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Preliminary FIN24A PSerDes Low Voltage 24-Bit Bi-Directional Serializer/Deserializer with Multiple Frequency Ranges (Preliminary)
April 2005 Revised May 2005
FIN24A PSerDes Low Voltage 24-Bit Bi-Directional Serializer/Deserializer with Multiple Frequency Ranges (Preliminary)
General Description
The FIN24A allows for a pair of SerDes to interleave data from two different data sources going opposite directions or standard bi-directional interface operation. The bi-directional data flow is controlled through use of a direction (DIRI) control pin. The devices can be configured to operate in a unidirectional mode only by hardwiring the DIRI pin. An internal PLL generates the required bit clock frequency for transfer across the serial link. The FIN24A supports multiple input frequency ranges which are selected by the S1 and S2 control pins. Options exist for dual or single PLL operation dependent upon system operational parameters. The device has been designed for low power operation and utilizes Fairchild Low Power LVDS interface. The device also supports an ultra low power Power-Down mode for conserving power in battery operated applications.
Features
s Low power consumption s Low power standards based LVDS differential interface s LVCMOS parallel I/O interface
* 2 mA source/sink current * Over-voltage tolerant control signals
s I/O Power Supply range between 1.65V and 3.6V s Analog Power Supply range of 2.775V r 5% s Multi-Mode operation allows for a single device to operate as Serializer or Deserializer s Internal PLL with no external components s Standby Power-Down mode support s Small footprint 40-terminal MLP packaging s Built in differential termination s Supports external CKREF frequencies between 2MHz and 30MHz s Serialized data rate up to 780Mb/s
Ordering Code:
Order Number FIN24AGFX (Preliminary) FIN24AMLX Package Number BGA042A MLP040A Package Description Pb-Free 42-Ball Ultra Small Scale Ball Grid Array (USS-BGA), JEDEC MO-195, 3.5mm Wide Pb-Free 40-Terminal Molded Leadless Package (MLP), Quad, JEDEC MO-220, 6mm Square
Pb-Free package per JEDEC J-STD-020B. BGX and MLP packages available in Tape and Reel only.
PSerDes is a trademark of Fairchild Semiconductor Corporation.
(c) 2005 Fairchild Semiconductor Corporation
DS500888
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Preliminary FIN24A Functional Block Diagram
Connection Diagram
Terminal Assignments for MLP
(Top View)
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Preliminary FIN24A Terminal Description
Terminal Name DP[1:20] DP[21:22] DP[23:24] CKREF STROBE CKP DSO / DSI DSO / DSI I/O Type I/O I O IN IN OUT DIFF-I/O Number of Terminals 20 2 2 1 1 1 2 Description of Signals LVCMOS Parallel I/O. Direction controlled by DIRI pin LVCMOS Parallel Unidirectional Inputs LVCMOS Unidirectional Parallel Outputs LVCMOS Clock Input and PLL Reference LVCMOS Strobe Signal for Latching Data into the Serializer LVCMOS Word Clock Output LpLVDS Differential Serial I/O Data Signals (Note 1) DSO: Refers to output signal pair DSI: Refers to input signal pair DSO(I): Positive signal of DSO(I) pair DSO(I): Negative signal of DSO(I) pair LpLVDS Differential Deserializer Input Bit Clock CKSI: Refers to signal pair CKSI: Positive signal of CKSI pair CKSI: Negative signal of CKSI pair LpLVDS Differential Serializer Output Bit Clock CKSO: Refers to signal pair CKSO: Positive signal of CKSO pair CKSO: Negative signal of CKSO pair LVCMOS Mode Selection terminals used to select Frequency Range for the RefClock, CKREF LVCMOS Control Input Used to control direction of Data Flow: DIRI "1" Serializer, DIRI "0" Deserializer LVCMOS Control Output Inversion of DIRI Power Supply for Parallel I/O and Translation Circuitry Power Supply for Core and Serial I/O Power Supply for Analog PLL Circuitry Use Bottom Ground Plane for Ground Signals
CKSI, SKSI
DIFF-IN
2
CKSO, SKSO DIFF-OUT
2
S1 S2 DIRI
IN IN IN
1 1 1
DIRO VDDP VDDS VDDA GND
OUT Supply Supply Supply Supply
1 1 1 1 0
Note 1: The DSO/DSI serial port pins have been arranged such that when one device is rotated 180 degrees with respect to the other device the serial connections will properly align without the need for any traces or cable signals to cross. Other layout orientations may require that traces or cables cross.
Control Logic Circuitry
The FIN24A has the ability to be used as a 24-bit Serializer or a 24-bit Deserializer. Pins S1 and S2 must be set to accommodate the clock reference input frequency range of the serializer. The table below shows the pin programming of these options based on the S1 and S2 control pins. The DIRI pin controls whether the device is a serializer or a deserializer. When DIRI is asserted LOW, the device is configured as a deserializer. When the DIRI pin is asserted HIGH, the device will be configured as a serializer. Changing the state on the DIRI signal will reverse the direction of the I/O signals and generate the opposite state signal on DIRO. For unidirectional operation the DIRI pin should be hardwired to the HIGH or LOW state and the DIRO pin should be left floating. For bi-directional operation the DIRI of the master device will be driven by the system and the DIRO signal of the master will be used to drive the DIRI of the slave device. Serializer/Deserializer with Dedicated I/O Variation The serialization and deserialization circuitry is setup for 24 bits. Because of the dedicated inputs and outputs only 22 3
bits of data are ever serialized or deserialized. Regardless of the mode of operation the serializer is always sending 24 bits of data plus 2 boundary bits and the deserializer is always receiving 24 bits of data and 2 word boundary bits. Bits 23 and 24 of the serializer will always contain the value of zero and will be discarded by the deserializer. DP[21:22] input to the serializer will be deserialized to DP[23:24] respectively. Turn-Around Functionality The device passes and inverts the DIRI signal through the device asynchronously to the DIRO signal. Care must be taken by the system designer to insure that no contention occurs between the deserializer outputs and the other devices on this port. Optimally the peripheral device driving the serializer should be put into a HIGH Impedance state prior to the DIRI signal being asserted. When a device with dedicated data outputs turns from a deserializer to a serializer the dedicated outputs will remain at the last logical value asserted. This value will only change if the device is once again turned around into a deserializer and the values are overwritten.
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Preliminary FIN24A
TABLE 1. Control Logic Circuitry Mode S2 S1 DIRI Number 0 1 0 0 0 2 1 1 3 1 1 0 1 1 0 0 1 1 x 1 0 1 0 1 0 Description Power-Down Mode 24-Bit Serializer 2MHz to 5MHz CKREF 24-Bit Deserializer 24-Bit Serializer 5MHz to 15MHz CKREF 24-Bit Deserializer 24-Bit Serializer 10MHz to 30MHz CKREF 24-Bit Deserializer Serializer Operation: (Figure 1) Modes 1, 2, or 3 DIRI equals 1 CKREF equals STROBE The PLL must receive a stable CKREF signal in order to achieve lock prior to any valid data being sent. The CKREF signal can be used as the data STROBE signal provided that data can be ignored during the PLL lock phase. Once the PLL is stable and locked the device can begin to capture and serialize data. Data will be captured on the rising edge of the STROBE signal and then serialized. The serialized data stream is synchronized and sent source synchronously with a bit clock with an embedded word boundary. When operating in this mode the internal deserializer circuitry is disabled including the serial clock, serial data input buffers, the bi-directional parallel outputs and the CKP word clock. The CKP word clock will be driven HIGH. Serializer Operation: (Figure 2) DIRI equals 1 CKREF does not equal STROBE If the same signal is not used for CKREF and STROBE, then the CKREF signal must be run at a higher frequency than the STROBE rate in order to serialize the data correctly. The actual serial transfer rate will remain at 26 times the CKREF frequency. A data bit value of zero will be sent when no valid data is present in the serial bit stream. The operation of the serializer will otherwise remain the same. The exact frequency that the reference clock needs to run at will be dependent upon the stability of the CKREF and STROBE signal. If the source of the CKREF signal implements spread spectrum technology then the maximum frequency of this spread spectrum clock should be used in calculating the ratio of STROBE frequency to the CKREF frequency. Similarly if the STROBE signal has significant cycle-to-cycle variation then the maximum cycle-to-cycle time needs to be factored into the selection of the CKREF frequency. Serializer Operation: (Figure 3) DIRI equals 1 No CKREF A third method of serialization can be done by providing a free running bit clock on the CKSI signal. This mode is enabled by grounding the CKREF signal and driving the DIRI signal HIGH. At power-up the device is configured to accept a serialization clock from CKSI. If a CKREF is received then this device will enable the CKREF serialization mode. The device will remain in this mode even if CKREF is stopped. To re-enable this mode the device must be powered down and then powered back up with a "logic 0" on CKREF.
Power-Down Mode: (Mode 0)
Mode 0 is used for powering down and resetting the device. When both of the mode signals are driven to a LOW state the PLL and references will be disabled, differential input buffers will be shut off, differential output buffers will be placed into a HIGH impedance state, LVCMOS outputs will be placed into a HIGH impedance state and LVCMOS inputs will be driven to a valid level internally. Additionally all internal circuitry will be reset. The loss of CKREF state is also enabled to insure that the PLL will only power-up if there is a valid CKREF signal. In a typical application mode signals of the device will typically not change states other than between the desired frequency range and the power-down mode. This allows for system level power-down functionality to be implemented via a single wire for a SerDes pair. The S1 and S2 selection signals that have their operating mode driven to a "logic 0" should be hardwired to GND. The S1 and S2 signals that have their operating mode driven to a "logic 1" should be connected to a system level power-down signal.
Serializer Operation Mode
The serializer configurations are described in the following sections. The basic serialization circuitry works essentially identical in these modes but the actual data and clock streams will differ dependent on if CKREF is the same as the STROBE signal or not. When it is stated that CKREF STROBE this means that the CKREF and STROBE signals have an identical frequency of operation but may or may not be phase aligned. When it is stated that CKREF does not equal STROBE then each signal is distinct and CKREF must be running at a frequency high enough to avoid any loss of data condition. CKREF must never be a lower frequency than STROBE.
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Preliminary FIN24A Serializer Operation Mode
(Continued)
FIGURE 1. Serializer Timing Diagram (CKREF equals STROBE)
FIGURE 2. Serializer Timing Diagram (CKREF does not equal STROBE)
FIGURE 3. Serializer Timing Diagram Using Provided Bit Clock (No CKREF)
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Preliminary FIN24A Deserializer Operation Mode
The operation of the deserializer is only dependent upon the data received on the DSI data signal pair and the CKSI clock signal pair. The following two sections describe the operation of the deserializer under two distinct serializer source conditions. References to the CKREF and STROBE signals refer to the signals associated with the serializer device used in generating the serial data and clock signals that are inputs to the deserializer. When operating in this mode the internal serializer circuitry is disabled including the parallel data input buffers. If there is a CKREF signal provided then the CKSO serial clock will continue to transmit bit clocks. Deserializer Operation: DIRI equals 0 (Serializer Source: CKREF equals STROBE) When the DIRI signal is asserted LOW the device will be configured as a deserializer. Data will be captured on the serial port and deserialized through use of the bit clock sent with the data. The word boundary is defined in the actual clock and data signal. Parallel data will be generated at the time the word boundary is detected. The falling edge of CKP will occur approximately 6 bit times after the falling edge of CKSI. The rising edge of CKP will go high approximately 13 bit times after CKP goes LOW. The rising edge of CKP will be generated approximately 13 bit times later. When no embedded word boundary occurs then no pulse on CKP will be generated and CKP will remain HIGH. Deserializer Operation: DIRI equals 0 (Serializer Source: CKREF does not equal STROBE) The logical operation of the deserializer remains the same regardless of if the CKREF is equal in frequency to the STOBE or at a higher frequency than the STROBE. The actual serial data stream presented to the deserializer will however be different because it will have non-valid data bits sent between words. The duty cycle of CKP will vary based on the ratio of the frequency of the CKREF signal to the STROBE signal. The frequency of the CKP signal will be equal to the STROBE frequency. The falling edge of CKP will occur 6 bit times after the data transition. The LOW time of the CKP signal will be equal to 1/2 (13 bit times) of the CKREF period. The CKP HIGH time will be equal to STROBE period - 1/2 of the CKREF period. Figure 5 is representative of a waveform that could be seen when CKREF is not equal to STROBE. If CKREF was significantly faster then additional non-valid data bits would occur between data words.
FIGURE 4. Deserializer Timing Diagram (Serializer Source: CKREF equals STROBE)
FIGURE 5. Deserializer Timing Diagram (Serializer Source: CKREF does not equal STROBE)
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Preliminary FIN24A Embedded Word Clock Operation
The FIN24A sends and receives serial data source synchronously with a bit clock. The bit clock has been modified to create a word boundary at the end of each data word. The word boundary has been implemented by skipping a low clock pulse. This appears in the serial clock stream as 3 consecutive bit times where signal CKSO remains HIGH. In order to implement this sort of scheme two extra data bits are required. During the word boundary phase the data will toggle either HIGH-then-LOW or LOW-then-HIGH dependent upon the last bit of the actual data word. Table 2 provides some examples showing the actual data word and the data word with the word boundary bits added. Note that a 24-bit word will be extended to 26-bits during serial transmission. Bit 25 and Bit 26 are defined with-respect-to Bit 24. Bit 25 will always be the inverse of Bit 24, and Bit 26 will always be the same as Bit 24. This insures that a "0" o "1" and a "1" o "0" transition will always occur during the embedded word phase where CKSO is HIGH. The serializer generates the word boundary data bits and the boundary clock condition and embeds them into the serial data stream. The deserializer looks for the end of the word boundary condition to capture and transfer the data to the parallel port. The deserializer only uses the embedded word boundary information to find and capture the data. These boundary bits are then stripped prior to the word being sent out of the parallel port.
TABLE 2. Word Boundary Data Bits 24-Bit Data Words Hex 3FFFFFh 155555h xxxxxxh Binary 0011 1111 1111 1111 1111 1111b 0101 0101 0101 0101 01010 0101b 0xxx xxxx xxxx xxxx xxxx xxxxb 24-Bit Data Word with Word Boundary Hex 1FFFFFFh 1155555h 1xxxxxxh Binary 01 1111 1111 1111 1111 1111 1111b 01 0101 0101 0101 0101 0101 0101b 01 0xxx xxxx xxxx xxxx xxxx xxxxb
LVCMOS Data I/O
The LVCMOS input buffers have a nominal threshold value equal to 1/2 of VDDP. The input buffers are only operational when the device is operating as a serializer. When the device is operating as a deserializer the inputs are gated off to conserve power. The LVCMOS 3-STATE output buffers are rated for a source/sink current of 2 mAs at 1.8V. The outputs are active when the DIRI signal is asserted LOW. When the DIRI signal is asserted HIGH the bi-directional LVCMOS I/Os will be in a HIGH-Z state. Under purely capacitive load conditions the output will swing between GND and VDDP. The LVCMOS I/O buffers incorporate bushold functionality to allow for pins to maintain state when they are not driven. The bushold circuitry only consumes power during signal transitions.
Differential I/O Circuitry
The differential I/O circuitry is a low power variant of LVDS. The differential outputs operate in the same fashion as LVDS by sourcing and sinking a balanced current through the output pair. Like LVDS an input source termination resistor is required to develop a voltage at the differential input pair. The FIN24A device incorporates an internal termination resistor on the CKSI receiver and a gated internal termination resistor on the DS input receiver. The gated termination resistor insures proper termination regardless of direction of data flow. During power-down mode the differential inputs will be disabled and powered down and the differential outputs will be placed in a HIGH-Z state.
FIGURE 6. LVCMOS I/O
FIGURE 7. Bi-directional Differential I/O Circuitry
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Preliminary FIN24A PLL Circuitry
The CKREF input signal is used to provide a reference to the PLL. The PLL will generate internal timing signals capable of transferring data at 26 times the incoming CKREF signal. The output of the PLL is a Bit Clock that is used to serialize the data. The bit clock is also sent source synchronously with the serial data stream. There are two ways to disable the PLL. The PLL can be disabled by entering the Mode 0 state (S1 S2 0). The PLL will disable immediately upon detecting a LOW on both the S1 and S2 signals. When any of the other modes are entered by asserting either S1 or S2 HIGH and by providing a CKREF signal the PLL will power-up and goes through a lock sequence. One must wait the specified number of clock cycles prior to capturing valid data into the parallel port. An alternate way of powering down the PLL is by stopping the CKREF signal either HIGH or LOW. Internal circuitry detects the lack of transitions and shuts the PLL and serial I/O down. Internal references will not however be disabled allowing for the PLL to power-up and re-lock in a lesser number of clock cycles than when exiting Mode 0. When a transition is seen on the CKREF signal the PLL will once again be reactivated.
Application Mode Diagrams
Unidirectional Data Transfer
FIGURE 8. Simplified Block Diagram for Unidirectional Serializer and Deserializer
Figure 8 shows the basic operation diagram when a pair of SerDes is configured in an unidirectional operation mode. Master Operation: The device will... (Please refer to Figure 8) 1. During power-up the device will be configured as a serializer based on the value of the DIRI signal. 2. Accept CKREF_M word clock and generate a bit clock with embedded word boundary. This bit clock will be sent to the slave device through the CKSO port. 3. Receive parallel data on the rising edge of STROBE_M. 4. Generate and transmit serialized data on the DS signals which is source synchronous with CKSO. 5. Generate an embedded word clock for each strobe signal.
Slave Operation: The device will... 1. Be configured as a deserializer at power-up based on the value of the DIRI signal. 2. Accept an embedded word boundary bit clock on CKSI. 3. Deserialize the DS Data stream using the CKSI input clock. 4. Write parallel data onto the DP_S port and generate the CKP_S. CKP_S will only be generated when a valid data word occurs.
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Preliminary FIN24A Application Mode Diagrams
(Continued)
FIGURE 9. Unidirectional Serializer and Deserializer
FIGURE 10. Multiple Units, Unidirectional Signals in Each Direction
Figure 10 shows a half duplex connectivity diagram. This connectivity allows for two unidirectional data streams to be sent across a single pair of SerDes devices. Data will be sent on a frame by frame basis. For this mode of operation to work there needs to be some synchronization between when the Camera sends its data frame and when the LCD sends its data. One option for this is to have the LCD send data during the camera blanking period. External logic may need to be provided in order for this mode of operation to work. Devices will alternate frames of data controlled by a direction control and a direction sense. When DIRI, on the righthand FIN24A is HIGH, data will be sent from the Camera to
the Camera interface at the base. When DIRI, on the righthand FIN24A goes LOW data will be sent from the baseband process to the LCD. The direction is then changed at DIRO on the right-hand FIN24A indicating to the left-hand FIN24A to change direction. Data will be sent from the Base LCD Unit to the LCD. The DIRO pin on the left-hand FIN24A is used to indicate to the base control unit that the signals are changing direction and the LCD is now available to be sent data. DIRI on the right-hand FIN24A could typically use a timing reference signal such as VSYNC from the camera interface to indicate direction change. A derivative of this signal may be required in order to make sure that no data is lost on the final data transfer.
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Preliminary FIN24A Absolute Maximum Ratings(Note 2)
Supply Voltage (VDD) ALL Input/Output Voltage LVDS Output Short Circuit Duration Storage Temperature Range (TSTG) Maximum Junction Temperature (TJ) Lead Temperature (TL) (Soldering, 4 seconds) ESD Rating Human Body Model, 1.5K:, 100pF Machine Model, 0:, 200pF
0.5V to 4.6V 0.5V to 4.6V
Continuous
Recommended Operating Conditions
Supply Voltage (VDDA, VDDS) Supply Voltage (VDDP) Operating Temperature (TA) (Note 2) Supply Noise Voltage (VDDA-PP) 2.775V r 5.0%V 1.65V to 3.6V
65qC to 150qC 150qC 260qC !2kV !200V
10qC to 70qC
100 mVP-P
Note 2: Absolute maximum ratings are DC values beyond which the device may be damaged or have its useful life impaired. The datasheet specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation outside datasheet specifications.
DC Electrical Characteristics
Over supply voltage and operating temperature ranges, unless otherwise specified.
Symbol LVCMOS I/O VIH VIL VOH Input High Voltage Input Low Voltage Output High Voltage IOH VOL Output Low Voltage IOL IIN II(Hold) Input Current Minimum Bushold Currents VIN VDDP VDDP VDDP II(OD) Minimum Required Bushold Overdrive Current IOFF Input/Output Power-Off Leakage Current DIFFERENTIAL I/O VOD Output Differential Voltage VOD Magnitude Change from Differential LOW-to-HIGH VOS Offset Voltage Offset Magnitude Change from Differential LOW-to-HIGH IOS IOZ VTH VTL VICM RTRM0 Short Circuit Output Current (Note 4) Disabled Output Leakage Current DP Differential Input Threshold LOW Input Common Mode Range CKSI Internal Receiver Termination Resistor DS I/O Termination Resistor 0V to VDDP, DIRI Differential Input Threshold HIGH See Figure 12 and Table 2 See Figure 12 and Table 2 VDD VID VID |DS 2.775 r 5% 225 mV, VIC 225 mV, VIC 925 mV, DIRI VID 925 mV, DIRI 0 0 300 80.0 80.0 925 100 100 VOUT 0V Driver Enabled Driver Disabled V DDP 100 RL RL RL 100 :, See Figure 100 :, See Figure 100 :, See Figure VDD 2.775 r 5% 925 15.0 150 225 350 15.0 mV mV mV mV mA VDDP VDDP VDDP VDDP 2.0 mA 0V to 3.6V 3.0, VIN 2.3, VIN 1.65, VIN 3.6, VIN 2.7, VIN 1.95, VIN 0V, VDDS 1.95 or 1.05 1.495 or 0.805 1.07 or 0.58 2.34 or 1.26 1.76 or 0.945 1.268 or 0.682 0, VDDA 0 VDDP 3.3 r 0.3 2.5 r 0.2 1.8 r 0.15 3.3 r 0.3 2.5 r 0.2 1.8 r 0.15 0.25 x VDDP V 0.75 x VDDP V 0.65 x VDDP GND VDDP 0.35 x VDDP V Parameter Test Conditions Min Typ (Note 3) Max Unit
2.0 mA
VDDP VDDP VDDP VDDP VDDP
5.0 r35.0 r25.0 r10.0 r200 r150 r75.0
5.0
PA
uA
uA
ALL LVCMOS Inputs/ Outputs 0V to 3.6V
r5.0
PA
'VOD
'VOS
2.5 r1.0
5.0 r5.0 r10.0 100
1550 120
PA PA
mV mV mV
|CKSI CKSI|
:
120
DSI|
VID
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Preliminary FIN24A DC Electrical Characteristics
Symbol IIN Parameter Input Current VIN VDD
(Continued)
Min Typ (Note 3) Max
Test Conditions VDD 0.3V or 0V 0V or VDD
Unit
r20.0
PA
Note 3: Typical Values are given for VDD 2.5V and TA 25qC. Positive current values refer to the current flowing into device and negative values means current flowing out of pins. Voltage are referenced to GROUND unless otherwise specified (except 'VOD and VOD). Note 4: The definition of short-circuit includes all the possible situations. For example, the short of differential pairs to Ground, the short of differential pairs (No Grounding) and either line of differential pairs tied to Ground.
Power Supply Currents
Symbol IDDA1 IDDA2 IDDS1 IDDS2 IDDS IDD_PD IDD_SER1 Parameter VDDA Serializer Static Supply Current VDDA Deserializer Static Supply Current VDDS Serializer Static Supply Current VDDS Deserializer Static Supply Current VDDA Static Supply Current VDD Power-Down Supply Current IDD_PD IDDA IDDS IDDP 26:1 Dynamic Serializer Power Supply Current IDD_SER1 IDDA IDDS IDDP CKREF DIRI H STROBE Test Conditions All DP and Control Inputs at 0V or VDD NOCKREF, S2 NOCKREF, S2 NOCKREF, S2 NOCKREF, S2 S1 S1 S2 S2 0 0, S2 S1 S2 S1 S2 S1 IDD_DES1 1:26 Dynamic Deserializer Power Supply Current IDD_DES1 IDDA IDDS IDDP CKREF DIRI L STROBE S2 S1 S2 S1 S2 S1 IDD_SER2 26:1 Dynamic Serializer Power Supply Current IDD_SER2 IDDA IDDS IDDP NO CKREF STROBE o Active CKSI DIRI 15X Strobe H L H H L H H L H H L H H 2 MHz 5 MHz 5 MHz 15 MHz 10 MHz 30 MHz 2 MHz 5 MHz 5 MHz 15 MHz 10 MHz 30 MHz 2 MHz 5 MHz 10 MHz 15 MHz 30 MHz TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD 0, S1 0, S1 0, S1 0, S1 1, DIR 1, DIR 1, DIR 1, DIR 1 0 1 0 All DP and Control Inputs at 0V or VDD All DP and Control Inputs at 0V or VDD All DP and Control Inputs at 0V or VDD All DP and Control Inputs at 0V or VDD Min Typ TBD TBD TBD TBD TBD Max TBD TBD TBD TBD TBD 5.0 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD mA mA mA Units
PA
mA mA mA mA
All Inputs at GND or VDD
PA
See Figure 13
See Figure 13
See Figure 13
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Preliminary FIN24A AC Electrical Characteristics
Over supply voltage and operating temperature ranges, unless otherwise specified.
Symbol tTCP Parameter CKREF Clock Period (2 MHz - 30 MHz) Test Conditions See Figure 17 CKREF STROBE CKREF does not equal STROBE tCPWH tCPWL tCLKT tSPWH tSPWL fMAX CKREF Clock High Time CKREF Clock Low Time LVCMOS Input Transition Time STROBE Pulse Width HIGH STROBE Pulse Width LOW Maximum Serial Data Rate See Figure 17 See Figure 17 See Figure 17 CKREF x 26 S2 S2 S2 Serializer AC Electrical Characteristics tTLH tTHL tSTC tHTC tTCCD tSPOS Differential Output Rise Time (20% to 80%) Differential Output Fall Time (80% to 20%) DP[n] Setup to STROBE DP[n] Hold to STROBE Transmitter Clock Input to Clock Output Delay CKSO Position Relative to DS See Figure 14 DIRI 1 1, 2.5 0 TBD TBD TBD TBD TBD TBD TBD TBD TBD 0.6 0.6 0.9 0.9 ns ns ns ns ns 0 S1 1 S1 1 S1 1 0 1 5.0 5.0 52.0 130 260 130 390 780 Mb/s S2 S2 S2 fREF CKREF Frequency Relative to Strobe Frequency S2 S2 S2 0 S1 1 S1 1 S1 0 S1 1 S1 1 S1 1 0 1 1 0 1 TBD TBD 0.5 0.5 1.1 *fST Min 200 66.0 33.0 T Typ Max 500 200 100 5.0 15.0 30.0 TBD TBD TBD T T ns ns ns MHz ns Units Serializer Electrical Characteristics
See Figure 16 (f 10 MHz) See Figure 20, DIRI CKREF STROBE
See Figure 23, (Note 5) CKREF Serialization Mode See Figure 23, (Note 5) No CKREF Serialization Mode
PLL AC Electrical Characteristics Specifications tJCC tTPLLS0 tTPLLD0 tTPLLD1 tS_DS tH_DS tRCOP tRCOL tRCOH tPDV tROLH tROHL CKSO Clock Out Jitter (Cycle-to-Cycle) Serializer Phase Lock Loop Stabilization Time PLL Disable Time Loss of Clock PLL Power-Down Time Serial Port Setup Time, DS-to-CKSI Serial Port Hold Time, DS-to-CKS CKP OUT Low Time CKP OUT High Time Data Valid to CKP LOW Output Rise Time (20% to 80%) Output Fall time (80% to 20%) (Note 6) See Figure 19 See Figure 24, (Note 7) See Figure 25 Figure 22, (Note 8) Figure 22, (Note 8) Figure 18 (Rising Edge Strobe) Serializer Source STROBE CKREF Where a (1/f)/26 (Note 9) Figure 18 (Rising Edge Strobe) Where a CL 8 pF Figure 15 (1/f)/26 (Note 9) 2.5 2.5 5.0 5.0 ns ns 500 500 33.0 13a-3 13a-3 6a-3 6a T 500 13a3 13a3 6a3 3.0 TBD 1000 10.0 20.0 ns Cycles us ns ps ps ns ns ns ns
Deserializer AC Electrical Characteristics
Deserializer Clock Output (CKP OUT) Period Figure 18
Note 5: Skew is measured from either the rising or falling edge of the clock (CKSO) relative to the center of the data bit (DSO). Both outputs should have identical load conditions for this to be valid. Note 6: This jitter specification is based on the assumption that PLL has a REF Clock with cycle-to-cycle input jitter less than 2ns. Note 7: The power-down time is a function of the CKREF frequency prior to CKREF being stopped HIGH or LOW and the state of the S1/S2 mode pins. The specific number of clock cycles required for the PLL to be disabled will vary dependent upon the operating mode of the device. Note 8: Signals are transmitted from the serializer source synchronously. Note that in some cases data is transmitted when the clock remains at a high state. Skew should only be measured when data and clock are transitioning at the same time. Total measured input skew would be a combination of output skew from the serializer, load variations and ISI and jitter effects. Note 9: Rising edge of CKP will appear approximately 13 bit times after the falling edge of the CKP output. Falling edge of CKP will occur approximately 6 bit times after a data transition. Variation with respect to the CKP signal is due to internal propagation delays of the device. Note that if CKREF is not equal to STROBE for the serializer the CKP signal will not maintain a 50% Duty Cycle. The low time of CKP will remain 13 bit times.
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Preliminary FIN24A Control Logic Timing Controls
Symbol tPHL_DIR, tPLH_DIR tPLZ, tPHZ tPZL, tPZH tPLZ, tPHZ tPZL, tPZH tPLZ, tPHZ tPZL, tPZH Parameter Propagation Delay DIRI-to-DIRO Propagation Delay DIRI-to-DP Propagation Delay DIRI-to-DP Deserializer Disable Time: S0 or S1 to DP Deserializer Enable Time: S0 or S1 to DP Serializer Disable Time: S0 or S1 to CKSO, DS Serializer Enable Time: S0 or S1 to CKSO, DS Test Conditions DIRI LOW-to-HIGH or HIGH-to-LOW DIRI LOW-to-HIGH DIRI HIGH-to-LOW DIRI S1(2) DIRI S1(2) DIRI S1(2) DIRI 0, 0 and S2(1) 0, 0 and S2(1) 1, 0 and S2(1) 1, LOW-to-HIGH Figure 25 HIGH-to-LOW Figure 25 LOW-to-HIGH Figure 26 LOW-to-HIGH Figure 26 Min TBD Typ TBD Max 7.0 7.0 10.0 7.0 10.0 7.0 10.0 Units ns ns ns ns ns ns ns
S1(2) and S2(1)
Capacitance
Symbol CIN CIO Parameter Capacitance of Input Only Signals, CKREF, STROBE, S1, S2, DIRI Capacitance of Parallel Port Pins DP1:12 CIO-DIFF DIRI VDD DIRI VDD 1, S1 2.5V 1, S1 2.5V 0, PwnDwn 0, VDD 2.5V 0; 0, Test Conditions 0, Min Typ TBD TBD Max Units pF pF
Capacitance of Differential I/O Signals DIRI S1
TBD
pF
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Preliminary FIN24A AC Loading and Waveforms
Note A: For All input pulses, t R or tF 1 ns
FIGURE 11. Differential LpLVDS Output DC Test Circuit
FIGURE 12. Differential Receiver Voltage Definitions
Note: The Worst Case test pattern produces a maximum toggling of internal digital circuits, LpLVDS I/O and LVCMOS I/O with the PLL operating at the reference frequency unless otherwise specified. Maximum power is measured at the maximum VDD values. Minimum values are measured at the minimum VDD values. Typical values are measured at VDD 2.5V.
FIGURE 13. "Worst Case" Serializer Test Pattern
FIGURE 14. LpLVDS Output Load and Transition Times
FIGURE 15. LVCMOS Output Load and Transition Times
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14
Preliminary FIN24A AC Loading and Waveforms
(Continued)
Setup: MODE0
"0" or "1", MODE1
"1", SER/DES
"1"
FIGURE 16. Serial Setup and Hold Time
FIGURE 17. LVCMOS Clock Parameters
Setup: EN_DES
"1", CKSI and DSI are valid signals
Note: CKREF Signal is free running.
FIGURE 18. Deserializer Data Valid Window Time and Clock Output Parameters
FIGURE 19. Serializer PLL Lock Time
Note: STROBE
CKREF
FIGURE 20. Serializer Clock Propagation Delay
FIGURE 21. Deserializer Clock Propagation Delay
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Preliminary FIN24A AC Loading and Waveforms
(Continued)
FIGURE 22. Differential Input Setup and Hold Times
FIGURE 23. Differential Output Signal Skew
Note: CKREF Signal can be stopped either HIGH or LOW
FIGURE 24. PLL Loss of Clock Disable Time
FIGURE 25. PLL Power-Down Time
Note: CKREF must be active and PLL must be stable
Note: If S1(2) transitioning then S2(1) must
0 for test to be valid
FIGURE 26. Serializer Enable and Disable Time
FIGURE 27. Deserializer Enable and Disable Times
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16
Preliminary FIN24A Tape and Reel Specification
TAPE FORMAT for USS-BGA
Dimensions are in millimeters Package 3.5 x 4.5 A0 B0 D D1 min 1.5 E F K0 P1 TYP 8.0 P0 TYP 4.0 P2 T TYP 0.3 TC W WC TYP 9.3
r0.10
TBD
r0.10
TBD
r0.05
1.55
r0.1
1.75
r0.1
5.5
r0.1
1.1
r0/05
2.0
r0.005
0.07
r0.3
12.0
Note: A0, B0, and K0 dimensions are determined with respect to the EIA/JEDEC RS-481 rotational and lateral movement requirements (see sketches A, B, and C).
Dimensions are in millimeters Tape Width 8 12 16 Dia A max 330 330 330 Dim B min 1.5 1.5 1.5 Dia C Dia D min 20.2 20.2 20.2 Dim N min 178 178 178 Dim W1 Dim W2 max 14.4 18.4 22.4 Dim W3 (LSL - USL) 7.9 a 10.4 11.9 a 15.4 15.9 a 19.4
0.5/0.2
13.0 13.0 13.0
2.0/0
8.4 12.4 16.4
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Preliminary FIN24A Tape and Reel Specification
TAPE FORMAT for MLP Package Designator MLX Tape Section Leader (Start End) Carrier Trailer (Hub End) MLP Embossed Tape Dimension (Continued) Number Cavities 125 (typ) 3000 75 (typ) Cavity Status Empty Filled Empty Cover Tape Status Sealed Sealed Sealed
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Preliminary FIN24A Physical Dimensions inches (millimeters) unless otherwise noted
Pb-Free 42-Ball Ultra Small Scale Ball Grid Array (USS-BGA), JEDEC MO-195, 3.5mm Wide Package Number BGA042A
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Preliminary FIN24A PSerDes Low Voltage 24-Bit Bi-Directional Serializer/Deserializer with Multiple Frequency Ranges (Preliminary) Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 40-Terminal Molded Leadless Package (MLP), Quad, JEDEC MO-220, 6mm Square Package Number MLP040A
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 20 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com

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