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(R)
SP333
+5V Only RS-232/AppleTalkTM Programmable Transceiver
+5V Only, Single Supply Operation Low Power Shutdown 28-Pin SOIC Packaging 3 Drivers, 5 Receivers - RS-232 Complete AppleTalkTM Interface High Data Rates 5Mbps Differential Transceivers 460kbps Single-Ended Transceivers
Now Available in Lead Free Packaging
DESCRIPTION... The SP333 is a monolithic device that supports both MacintoshTM and PC serial interfaces. RS-232 mode offers three (3) RS-232 drivers and five (5) RS-232 receivers. Mac mode includes a differential driver and a single-ended inverting driver. Receivers in Mac mode include one differential receiver, one non-inverting single-ended receiver and one inverting single-ended receiver. An on-chip charge pump allows +5V-only operation, and a low power Shutdown mode makes the SP333 ideal for battery powered applications. The interface mode can be changed at any time by a mode select pin.
PC Mode
9 0.1F 12
+5V 0V 25 5V CC 0.1F
Mac Mode
9 0.1F 0.1F 12
+5V +5V 5V 25 CC 0.1F
0.1F
10 RS-232/MacMode V+ 14 11 C2+ VShutdown 26 13 C2-
SP333
0.1F
10 RS-232/MacMode V+ 14 11 C2+ VShutdown 26 13 C2-
SP333
0.1F
27 TI1
T1
TX1 6 27 TI1 TX2 7 2 TXEN T1
TX1 6 TX2 7
28 TI2
T2
1 TI3 19 RX1 20 RX2 21 RX3 22 RX4 23 RX5 3
RXEN
T3 R1
TX3 4 RI1 15 RI2 16 RI3 17 RI4 18 RI5 24 GND 8
1 TI3 19 RX1
T3
TX3 4 RI2 16
R1
RI1 15
R2
R3
21 RX3
R3
RI3 17
R4
R5
23 RX5 3
RXEN
R5
RI5 24 GND 8
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VCC...................................................................................................+12V Input Voltages Logic........................................................-0.3V to (VCC+0.5V) Drivers..................................................-0.3V to (VCC+0.5V) Receivers..................................................................15V Driver Outputs......................................................................................14V Storage Temperature..................................................-65C to +150C Power Dissipation..........................................................................1000mW
SPECIFICATIONS
TMIN to TMAX and VCC = 5V5% unless otherwise noted.
PARAMETER MAC Mode (pin 25 = +5V) Differential Driver High Level Output Voltage Low Level Output Voltage Differential Output, Load Differential Output, No Load Driver Short Circuit Current Output Leakage Current Input High Voltage Input Low Voltage Input Current Transition Time Propagation Delay tPHL tPLH Data Rate
MIN.
TYP.
MAX.
UNITS
CONDITIONS
+3.6 -3.6 5V 40 2.0 0.8 20 30 100 100 5 +6.0 -3.6 10 40 2.0 0.8 20 30 100 100 5 -0.2 70 12 3.5 0.4 85 +0.2 10 500 100
Volts Volts Volts Volts mA A Volts Volts A ns ns ns Mbps Volts Volts Volts mA Volts Volts A ns ns ns Mbps Volts mV k Volts Volts mA
IOH = 8mA IOH = -8mA RL = 450 (TX outputs to GND) RL = -7VVO+7V; VIN LOW0.8V or VIN HIGH2.0V -7VVO+7V; TxEN = VCC Applies to differential driver inputs Applies to differential driver inputs VIN = 0V to VCC RL = 450, CL = 50pF; Rise/Fall 10% - 90% RL = 450, CL = 50pF RL = 450, CL = 50pF RL = 450, CL = 50pF RL = 450 to GND; VIN LOW0.8V or VIN HIGH2.0V RL = 450 to GND; VIN LOW0.8V or VIN HIGH2.0V RL = -7VVO+7V; Infinite duration Applies to single-ended driver inputs Applies to single-ended driver inputs VIN = 0V to VCC RL = 450, CL = 50pF; Rise/Fall 10% - 90% RL = 450, CL = 50pF RL = 450, CL = 50pF RL = 450, CL = 50pF -7VVCM+7V VCM=0V -7VVCM+7V ISOURCE = -4mA ISINK = +4mA 0VVOUTVCC
Single-Ended Inverting Driver High Level Output Voltage +3.6 Low Level Output Voltage Driver Open Circuit Voltage Driver Short Circuit Current Input High Voltage Input Low Voltage Input Current Transition Time Propagation Delay tPHL tPLH Data Rate Differential Receiver Differential Input Threshold Input Hysteresis Input Resistance Output Voltage High Output Voltage Low Short Circuit Current -6.0
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
2
SPECIFICATIONS (CONTINUED)
TMIN to TMAX and VCC = 5V5% unless otherwise noted.
PARAMETER Differential Receiver Propagation Delay tPHL tPLH Data Rate
MIN.
TYP.
MAX.
UNITS
CONDITIONS
100 100 5 +15 1.2 1.7 500 5 3.0 1000 7 0.4 100 100
ns ns Mbps Volts Volts Volts mV k Volts Volts ns ns Mbps +7 +0.2 Volts Volts Volts mV k Volts Volts ns ns Mbps
RL = 450, CL = 50pF RL = 450, CL = 50pF RL = 450, CL = 50pF
Single-Ended Inverting Receiver Input Voltage Range -15 Input Threshold Low 0.8 Input Threshold High Hysteresis 200 Input Impedance 3 Output Voltage High 3.5 Output Voltage Low Propagation Delay tPHL tPLH Data Rate 5 Single-Ended Non-Inverting Receiver Input Voltage Range -7 Input Threshold Low -0.2 Input Threshold High Hysteresis Input Impedance 12 Output Voltage High 3.5 Output Voltage Low Propagation Delay tPHL tPLH Data Rate 5 PC Mode (pin 25 = GND) RS-232 Driver TTL Input Levels VIL VIH High Level Voltage Output Low Level Voltage Output Open Circuit Output Short Circuit Current Power Off Impedance Slew Rate Transition Time Propagation Delay tPHL tPLH Data Rate RS-232 Receiver TTL Output Levels VOL VOH Receiver Input High Threshold 460
ISOURCE = -4mA ISINK = +4mA
70 15 0.4 100 100
ISOURCE = -4mA ISINK = +4mA
0.8 2.0 +5.0 -15.0 300 60 1.56 1.5 1.3 600 +15.0 -5.0 15 100
Volts Volts Volts Volts Volts mA Ohms V/s s s s kbps
Applies to transmitter inputs Applies to transmitter inputs RL = 3k to Gnd RL = 3k to Gnd RL = VOUT = Gnd VCC=0V; VOUT= 2V RL=3k, CL=50pF; From +3V to -3V or -3V to +3V Rise/fall time, between +3V & -3V ; RL=3k, CL=2500pF RL=3k, CL=1000pF; From 1.5V of TIN to 50% of VOUT RL=3k, CL=1000pF; From 1.5V of TIN to 50% of VOUT RL=3k, CL=1000pF
0.4 2.4 1.7 3.0
Volts Volts
ISINK = 4mA ISOURCE = -4mA
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
3
SPECIFICATIONS (CONTINUED)
TMIN to TMAX and VCC = 5V5% unless otherwise noted.
PARAMETER RS-232 Receiver Low Threshold Input Voltage Range Input Impedance Hysteresis Transmission Rate Propagation Delay tPHL tPLH Data Rate POWER REQUIREMENTS No Load Supply Current Shutdown Supply Current AC PARAMETERS Differential Mode tPZL; Enable to Output low tPZH; Enable to Output high tPLZ; Disable from Output low tPHZ; Disable from Output high
MIN. 0.8 -15 3 0.2 10
TYP. 1.2 5 0.5 100 100 600 15
MAX.
UNITS Volts Volts kOhms Volts Mbps ns ns kbps mA A
CONDITIONS
+15 7 1.0 600 600
VIN=15V VCC=+5V From 50% of VIN to 1.5V of ROUT From 50% of VIN to 1.5V of ROUT
460
25 75
No load; VCC=5.0V; TA=25C TA=25C, VCC=5.0V
200 200 200 200
1000 1000 1000 1000
ns ns ns ns
CL=100pF, Figures 2 & 4, S2 closed CL=100pF, Figures 2 & 4, S1 closed CL=15pF, Figures 2 & 4, S2 closed CL=15pF, Figures 2 & 4, S1 closed
Receiver Delay Time from Enable Mode to Tri-state Mode Single-Ended Mode tPZL; Enable to Output low 200 1000 tPZH; Enable to Output high 200 1000 tPLZ; Disable from Output low 200 1000 tPHZ; Disable from Output high 200 1000 Differential Mode tPZL; Enable to Output low tPZH; Enable to Output high tPLZ; Disable from Output low tPHZ; Disable from Output high Notes: 1. 2. 3. 4.
ns ns ns ns
CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed
200 200 200 200
1000 1000 1000 1000
ns ns ns ns
CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed CRL=15pF, Figures 1 & 6, S1 closed CRL=15pF, Figures 1 & 6, S2 closed
Measured from 2.5V of RIN to 2.5V of ROUT. Measured from one-half of RIN to 2.5V of ROUT. Measured from 1.5V of TIN to one-half of TOUT. Measured from 2.5V of RO to 0V of A and B.
Output Under Test
500 CL
S1
VCC
Receiver Output CRL
Test Point S1 1K S2
1K VCC
S2
Figure 1. Circuit
Rev 07/29/02
Driver
Timing
Test
Load
Figure 2. Circuit
Receiver
Timing
Test
Load
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
4
+3V DRIVER INPUT 0V DRIVER OUTPUT TX 1 DIFFERENTIAL VO+ OUTPUT 0V TX1 - TX2 VO-
Figure 3. Driver Propagation Delays
f = 1MHz; tR < 10ns; tF < 10ns 1.5V tPLH VO 1/2VO tSKEW tPHL 1/2VO tSKEW 1.5V
TX2
tR
tF
+3V TXEN 0V 5V TXx VOL VOH TXx 0V
f = 1MHz; tR < 10ns; tF < 10ns 1.5V tZL 2.3V Output normally LOW 1.5V tLZ 0.5V 0.5V tHZ
2.3V tZH
Output normally HIGH
Figure 4. Driver Enable and Disable Times
V0D2+ RI1-RI2 V0D2- VOH RX VOL tPHL
0V
INPUT
0V
1.5V
OUTPUT
1.5V
tPLH f = 1MHz; tR < 10ns; tF < 10ns
Figure 5. Receiver Propagation Delays
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
5
+3V RXEN 0V 5V RXx VIL VIH RXx 0V
1.5V f = 1MHz; t < 10ns; t < 10ns R F tZL 1.5V Output normally LOW
1.5V tLZ 0.5V 0.5V tHZ
1.5V tZH
Output normally HIGH
Figure 6. Receiver Enable and Disable Times
THEORY OF OPERATION... The SP333 is a single chip device that can be configured via software for either RS-232 or AppleTalkTM interface modes at any time. The SP333 is made up of three basic circuit elements: single-ended drivers and receivers, differential drivers and receivers, and charge pump. APPLETALKTM DRIVERS/RECEIVERS... To program the SP333 for MacMode, Pin 25 should be connected to a logic HIGH. In MacMode, the SP333 offers a complete AppleTalk serial interface. The driver section of the AppleTalk interface is made up of a differential driver and a singleended inverting driver. The differential driver has voltage swings that are typically 5V on each output pin under loaded conditions, and typically 8V under no-load conditions. The differential driver can maintain 3.6V (minimum) swings (per pin) under worst case load conditions of 450 between the differential output. The differential driver is equipped with a tristate control pin. When TXEN is a logic LOW, the differential driver is active. When the TXEN pin is a logic HIGH, the differential driver outputs are tri-stated. The TXEN pin only functions in MacMode. The differential AppleTalk driver can support data rates up to 5Mbps.
The single-ended AppleTalk driver also has typical voltage output swings of 5V under loaded conditions, and 8V under no-load conditions. The single-ended AppleTalk driver can maintain 3.6V (minimum) swings under worst case conditions of 450 to ground. The singleended AppleTalk driver can support data rates up to 5Mbps. The receiver section of the SP333 is made up of a differential receiver, a single-ended non-inverting receiver , and a single-ended inverting receiver. The differential receiver has an input sensitivity of 200mV over a common mode range of 7V. The receivers have a typical input resistance of 15k (12k minimum). The differential receiver can receive data up to 5Mbps. The single-ended non-inverting receiver has a 200mV input threshold, however, the input voltage can vary between 7V. The typical input resistance of the single-ended non-inverting receiver is 15k (12k minimum). The single-ended non-inverting receiver can also receive data up to 5Mbps. The SP333 also has a single-ended inverting receiver input. This receiver is basically an RS232 receiver (R5 receiver) and is typically used as a GPI (General Purpose Input) in the AppleTalk interface. The GPI input has TTLcompatible input thresholds that can receive signals up to 15V. The input resistance of the single-ended inverting receiver is typically 5k (3k to 7k). The GPI receiver can operate up to 5Mbps.
(c) Copyright 2002 Sipex Corporation
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
6
SINGLE ENDED DRIVERS/RECEIVERS... RS-232 (V.28) Drivers... The single-ended drivers and receivers comply the with the RS-232E and V.28 standards. The drivers are inverting transmitters which accept either TTL or CMOS inputs and output the RS232 signals with an inverted sense relative to the input logic levels. Typically, the RS-232 driver output voltage swing is 9V with no load and is guaranteed to be greater than 5V under full load. The drivers rely on the V+ and V- voltages generated by the on-chip charge pump to maintain proper RS-232 output levels. With worst case load conditions of 3k and 2500pF, the four RS-232 drivers can still maintain 5V output levels. The drivers can operate over 400kbps; the propagation delay from input to output is typically 1.5s. During shutdown, the driver outputs will be put into a high impedance tri-state mode. RS-232 (V.28) Receivers... The RS-232 receivers convert RS-232 input signals to inverted TTL signals. Each of the four receivers features 500mV of hysteresis margin to minimize the affects of noisy tranmission lines. The inputs also have a 5k resistor to ground, in an open circuit situation the input of the receiver will be forced low, committing the
VCC = +5V
output to a logic HIGH state. The input resistance will maintain 3k-7k over a 15V range. The maximum operating voltage range for the receiver is 30V, under these conditions the input current to the receiver must be limited to less than 100mA. Due to the on-chip ESD protection circuitry, the receiver inputs will be clamped to 15V levels; this should not affect operation at 30Volts. The RS-232 receivers can operate over 400kbps. CHARGE PUMP... The charge pump is a Sipex-patented design (5,306,954) and uses a unique approach compared to older less-efficient designs. The charge pump still requires four external capacitors, but uses a four-phase voltage shifting technique to attain symmetrical 10V power supplies. The capacitor values of the SP333 can be as low as 0.1F. Figure 11a shows the waveform found on the positive side of capacitor C2, and Figure 11b shows the negative side of capacitor C2. There is a free-running oscillator that controls the four phases of the voltage shifting. A description of each phase follows.
VCC = +5V
+10V C1
+ -
C4
+ - +
+5V VDD Storage Capacitor VSS Storage Capacitor C1
+ -
C4
+ - +
C2
+ - -
C2
+ - -
VDD Storage Capacitor VSS Storage Capacitor
C3
-5V
-5V
C3
Figure 7. Charge Pump Phase 1
Figure 8. Charge Pump Phase 2
VCC = +5V
VCC = +5V
C4
+ - +
+5V
VDD Storage Capacitor
C4
+ - +
C1
+ -
C2
+ - -
C1
VSS Storage Capacitor
+ -
C2
+ - -
VDD Storage Capacitor VSS Storage Capacitor
-10V
C3
-5V
-5V
C3
Figure 9. Charge Pump Phase 3
Figure 10. Charge Pump Phase 4
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
7
Phase 1 -Vss charge storage- During this phase of the clock cycle, the positive side of capacitors C1 and C2 are initially charged to +5V. C1+ is then switched to ground and charge in C1- is transferred to C2-. Since C2+ is connected to +5V, the voltage potential across capacitor C2 is now 10V. Phase 2 -Vss transfer- Phase two of the clock connects the negative terminal of C2 to the Vss storage capacitor and the positive terminal of C2 to ground, and transfers the generated -10V to C3. Simultaneously, the positive side of capacitor C1 is switched to +5V and the negative side is connected to ground. Phase 3 -Vdd charge storage- The third phase of the clock is identical to the first phase- the transferred charge in C1 produces -5V in the negative terminal of C1, which is applied to the negative side of capacitor C2. Since C2+ is at +5V, the voltage potential across C2 is 10V. Phase 4 -Vdd transfer- The fourth phase of the clock connects the negative terminal of C2 to ground and transfers the generated 10V across C2 to C4,
the Vdd storage capacitor. Simultaneously with this, the positive side of capacitor C1 is switched to +5V and the negative side is connected to ground, and the cycle begins again. Since both V+ and V- are separately generated from Vcc in a no load condition, V+ and V- will be symmetrical. Older charge pump approaches that generate V- from V+ will show a decrease in the magnitude of V- compared to V+ due to the inherent inefficiencies in the design. The clock rate for the charge pump typically operates at 15kHz. The external capacitors should be 0.1F with a 16V breakdown rating. External Power Supplies For applications that do not require +5V only, external supplies can be applied at the V+ and V- pins. The value of the external supply voltages must be no greater than 10V. The current drain from the 10V supplies is used for the RS232 drivers. For the RS-232 driver, the current requirement is 3.5mA per driver. The external power supplies should provide a power supply sequence of either: +10V, -10V, and then +5V; or -10V, +10V, and then +5V. It is critical that the 10V supplies are on before VCC.
+10V a) C2+ GND GND b) C2- -10V
Figure 11. Charge Pump Waveforms
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
8
Shutdown Mode The SP333 can be put into a low power shutdown mode by connecting the Shutdown pin (SD, Pin 26) to a logic HIGH. During Shutdown, the driver outputs are put into a high impedance tri-state, and the charge pump is put into stand-by mode. The supply current drops to less than 10A during shutdown and can be activated in either RS-232 or AppleTalk mode. For normal operation, the SD pin should be connected to a logic LOW. Receiver Enable The SP333 has a control line to enable or disable the receiver outputs. Pin 3 (RXEN) is active LOW; a logic LOW on Pin 3 will enable the receiver outputs. A logic HIGH on Pin 3 will disable the receiver outputs. The receiver enable function can be initiated in either RS-232 or AppleTalk mode. Wake-Up The SP333 also features a "wake-up" function. The wake up function allows the RS-232 receivers to remain active during Shutdown mode unless they are disabled by the Receiver Enable control pin (Pin 3). The wake-up feature allows users to take advantage of the low power Shutdown mode and keep the receivers active to accept an incoming "ring indicator" signal.
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
9
SP333 Typical Application for AppleTalkTM and RS-232
+5V +5V 5 9 25 12 SP333 11 13 27 2 1 19
0.1F 10 14 0.1F 26 6 7
0.1F 0.1F
APPLETALKTM INTERFACE
4 16 15 8 7 6 3
5 21 17 2 23 3 24 8
4
1
+5V 0V 9 25 0.1F 0.1F 12 11 13 27 28 1 19 20 21 22 23 3 5 10 0.1F 14 26 6 7 4 15 8 16 17 18 24 8 5 2 4 3 7 6 0.1F
SP333
PC INTERFACE
1
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
10
SP333 PIN CONFIGURATION
TI3 TXEN RXEN TX3 VCC TX1 TX2 GND C1+ V+ C2+ C1C2V1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 TI2 TI1 SD RS-232/Mac RI5 RX5 RX4 RX3 RX2 RX1 RI4 RI3 RI2 RI1
SP333
SP333 TYPICAL OPERATING CIRCUIT
PC Mode (RS-232)
+5V 0V 25 9 5V CC 0.1F
Mac Mode (AppleTalk)
+5V +5V 10 RS-232/MacMode 12 V+ 14 11 VC2+ Shutdown 26 13 C29 25 5V CC 0.1F
0.1F
0.1F
10 RS-232/MacMode 12 V+ 14 11 VC2+ Shutdown 26 13 C2-
SP333
0.1F
0.1F
SP333
0.1F
0.1F
27 TI1
T1
TX1 6 27 TI1 TX2 7 2 TXEN T1
TX1 6 TX2 7
28 TI2
T2
1 TI3 19 RX1 20 RX2 21 RX3 22 RX4 23 RX5 3
RXEN
T3 R1
TX3 4 RI1 15 RI2 16 RI3 17 RI4 18 RI5 24 GND 8
1 TI3 19 RX1
T3
TX3 4 RI2 16
R1
RI1 15
R2
R3
21 RX3
R3
RI3 17
R4
R5
23 RX5 3
RXEN
R5
RI5 24 GND 8
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
11
PACKAGE: PLASTIC SMALL OUTLINE (SOIC)
E
H
D A O e B A1 L
DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H L O
28-PIN 0.093/0.104 (2.352/2.649) 0.004/0.012 (0.102/0.300) 0.013/0.020 (0.330/0.508) 0.697/0.713 (17.70/18.09) 0.291/0.299 (7.402/7.600) 0.050 BSC (1.270 BSC) 0.394/0.419 (10.00/10.64) 0.016/0.050 (0.406/1.270) 0/8 (0/8)
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
12
ORDERING INFORMATION
Model Temperature Range Package Types SP333CT .............................................................................. 0C to +70C ......................................................................................... 28-Pin SOIC SP333ET ............................................................................. -40C to +85C ........................................................................................ 28-Pin SOIC
Available in lead free packaging. To order, add "-L" suffix to the part number. Example: SP33CT= standard. SP333CT-L = lead free.
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
Rev 07/29/02
SP333 RS-232/AppleTalk Programmable Transceiver
(c) Copyright 2002 Sipex Corporation
13

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