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Edge649 Octal Pin Electronics Driver/Receiver
TEST AND MEASUREMENT PRODUCTS Description
The Edge649 is an octal pin electronics driver and receiver combination fabricated in a high- performance CMOS process. It is designed for automatic test equipment and instrumentation where cost, functional density, and power are all at a premium. The Edge649 incorporates eight channels of programmable drivers and receivers into one package. Each channel has per pin driver levels, receiver threshold, and tristate control. The 11V driver output and receiver input range allows the Edge649 to interface directly between TTL, ECL, CMOS (3V, 5V, and 8V), and custom level circuitry. The Edge649 is pin and functionally compatible with the EDGE648, with the following performance differences: * reduced driver preshoot * faster driver propagation delay * superior driver pulse width distortion * higher driver Fmax operation * slightly slower driver output slew rates * higher comparator Fmax operation * lower comparator propagation delay * superior comparator pulse width distortion.
Featur es
* * * * * * * * 50 MHz Operation 11 V DUT I/O Range Programmable Output Levels Programmable Input Thresholds Per Pin Flexibility High Integration Levels 615 mW Quiescent Power Dissipation Edge648 Compatible
Functional Block Diagram
VHIGH
VLOW
8
8
8
DATA IN
Applications
8
DVR EN*
8
DUT
* * * * * * *
Burn-In ATE Functional Board Testers In-Circuit Board Testers Combinational Board Testers Low Cost Chip Testers ASIC Verifiers VXI-Based Test Equipment
8
DATA OUT
+ -
8
THRESHOLD
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Edge649
TEST AND MEASUREMENT PRODUCTS PIN Description
Pin Name DATA IN (0:7) Pin Number 64, 65, 66, 67, 3, 4, 5, 6 56, 57, 58, 59, 11, 12, 13, 14 46, 43, 40, 37, 33, 30, 27, 24 60, 61, 62, 63, 7, 8, 9, 10 45, 44, 39, 38, 32, 31, 26, 25 47, 42, 41, 36, 34, 29, 28, 23 50, 51, 52, 53, 17, 18, 19, 20 21, 49 Description TTL compatible inputs that determine the high/low status of the DUT drivers. CMOS level outputs that indicate the status of the DUT receivers.
DATA OUT (0:7)
DUT (0:7)
Pin electronic inputs/outputs that receive/drive the device under test.
DVR EN (0:7)
TTL compatible inputs that control the high impedance state of the DUT drivers. Unbuffered analog inputs that set the voltage level of a logical 1 of the DUT drivers. Unbuffered analog inputs that set the voltage level of a logical 0 of the DUT drivers. Buffered analog input voltage that sets the threshold for the DUT comparators. Analog positive power supply.
VHIGH (0:7)
VLOW (0:7)
THRESHOLD (0:7)
VCC
VEE
22, 48
Analog negative power supply.
VDD
1, 15, 55
Digital power supply.
GND
2, 16, 54, 68
Device ground.
N/C
35
No connection.
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Edge649
TEST AND MEASUREMENT PRODUCTS PIN Description (continued)
THRESHOLD3
THRESHOLD2
THRESHOLD1
THRESHOLD0
DATA OUT3
DATA OUT2
DATA OUT1
DATA OUT0
DVR EN*0
VHIGH0 45
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
DVR EN*1 DVR EN*2 DVR EN*3 DATA IN0 DATA IN1 DATA IN2 DATA IN3 GND VDD GND DATA IN4 DATA IN5 DATA IN6 DATA IN7 DVR EN*4 DVR EN*5 DVR EN*6
61 62 63 64 65 66 67 68 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 11
44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27
VHIGH1
VLOW0
DUT0
GND
VDD
VCC
VEE
DUT1 VLOW1 VLOW2 DUT2 VHIGH2 VHIGH3 DUT3 VLOW3 NC VLOW4 DUT4 VHIGH4 VHIGH5 DUT5 VLOW5 VLOW6 DUT6
DATA OUT4
DATA OUT5
DATA OUT6
DATA OUT7
VLOW7
VHIGH7
THRESHOLD4
THRESHOLD5
THRESHOLD6
THRESHOLD7
DVR EN*7
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VHIGH6
GND
VEE
DUT7
VDD
VCC
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Edge649
TEST AND MEASUREMENT PRODUCTS Circuit Description
Driver Description
VHIGH VLOW
VHIGH and VLOW VHIGH and VLOW define the logical "1" and "0" levels of the DUT driver and can be adjusted anywhere over the range determined by VCC and VEE. Table 1 documents the relationship between the analog power to supplies (VCC and VEE), the driver range (VHIGH and VLOW), and the comparator threshold range (VTHRESHOLD). The VHIGH and VLOW inputs are unbuffered in that they also provide the driver output current (see Figure 3), so the source of VHIGH and VLOW must have ample current drive capability.
VHIGH
DATA IN DUT
DVR EN*
Figure 1. Driver Diagram
As shown in Figure 1, Edge649 supports programmable high and low levels and tristate per channel. There are no shared lines between any drivers. The DVR EN* and DATA IN signals are TTL compatible inputs that control the driver (see Figure 2). With DVR EN* high, the DUT driver goes into a high impedance state. With DVR EN* low, DATA IN high forces the driver into a high state (DUT = VHIGH), and DATA IN low forces the driver low (DUT = VLOW).
DVR EN*
DUT
DATA IN VHIGH VLOW
VLOW
DUT
Figure 2. Driver Functionality
Figure 3. Simplified Model of the Unbuffered Output Stage
Drive/Receive Common Mode Range 0V <= DUT <= +6.5V
Threshold Range 0.1V <= THRESHOLD <= 3.0V
Power Supply Conditions VCC = +6.5V VEE = 0V VCC = +8V VEE = 0V VCC + 11V VEE = 0V VCC = +8V VEE = -3V
0V <= DUT <= +8V
0.1V <= THRESHOLD <= 4.5V
0V <= DUT <= +11V
0.1V <= THRESHOLD <= 7.5V
-3V <= DUT <= +8V
-2.9V <= THRESHOLD <= 4.5V
Table 1. Power Supply Requirement
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Edge649
TEST AND MEASUREMENT PRODUCTS Circuit Description (continued)
Driver Output Protection In a functional testing environment, where a resistor is added in series with the driver output, the Edge649 can withstand a short to any legal DUT voltage for an indefinite amount of time. In a low impedance application with no additional output series resistance, care must be exercised and systems should be designed to check for this condition and tristate the driver if a short is detected.
Receiver Functionality Edge649 supports programmable thresholds per channel. There are no shared lines between comparators. THRESHOLD is a high input impedance analog input which defines a logical "1" and "0" at the DUT (see Figure 4). If the DUT voltage is more positive than THRESHOLD, DATA OUT will be high. With DUT lower than THRESHOLD, DATA OUT will be low.
+ DATA OUT -
DUT THRESHOLD
THRESHOLD DUT
DATA OUT Tpd
Figure 4. Receiver Functionality
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Edge649
TEST AND MEASUREMENT PRODUCTS Application Infor mation
Power Supplies The Edge649 uses three power supplies: VDD, VCC and VEE. VDD is the digital supply for all of the data inputs and outputs. VCC and VEE are the analog power supplies for the Edge649 drivers and comparators. In order to protect the Edge649 and avoid damaging it, the following power supply requirements must be satisifed at all times: VEE GND VDD VCC VEE All Inputs VCC at all times VCC and VEE, which power the DUT drivers and receivers, should also be decoupled to GND with a .1 F chip capacitor in parallel with a .001 F chip capacitor. A VCC and VEE plane, or at least a solid power bus, is recommended for optimal performance.
VHIGH and VLOW Decoupling As the VHIGH and VLOW inputs are unbuffered and must supply the driver output current, decoupling capacitors for these inputs are recommended in proportion to the amount of output current the application requires
Also,
The three-diode configuration shown in Figure 5, used on a once-per-board basis, insures power supply sequence and fault tolerance.
VCC
Expanding the Common Mode Range
VDD 1N5820 or Equivalent
Although the Edge649 can drive and receive 11V swings, these 11 V signals can be adjusted over an 14V range. By using programmable regulators V1 and V2 for the VCC and VEE supplies (feasible because these two analog power supplies do not supply driver output current), the Edge649 I/O range can be optimized for a variety of applications (see Figure 6).
VEE
V1
Figure 5. Power Supply Protection Scheme
VCC
The sequence below can be used as a guideline with the Edge649: Power-On Sequencing 1. VCC (substrate) 2. VEE 3. VDD 4. Inputs Power Supplies Decoupling VDD, which provides the digital power, should be decoupled to GND with a .1 F chip capacitor in parallel with a .001 F chip capacitor. The bypass capacitors should be as close to the device as possible. Power and ground planes are recommended to provide a low inductance return path.
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Edge 649
Power-Off Sequencing 1. Inputs 2. VDD 3. VEE 4. VCC
VDD
V2
Figure 6.
There are three rules which govern the supplies V1 and V2: 1) 2) 3) VDD + 1.5V V1 +11V -3V V2 0V (V1 - V2) 11V
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Edge649
TEST AND MEASUREMENT PRODUCTS Application Infor mation (continued)
Window Comparator Certain applications require a dual threshold window comparator to distinguish between the DUT being high, low, or floating. To support this application, two Edge649 channels can be combined to create one channel with a window comparator (see Figure 7). Notice that connecting two DUT pins ties together the positive inputs of both receivers. The result is a difference in polarity between the digital outputs reporting the high and low status of the DUT. Trinary Driver At times, there is a need for a three-level driver. Typically, two levels are required for the standard digital "1" and "0" pattern generation. The third level provides a higher voltage to place the device under test (DUT) into a programming or test mode. By controlling the DATA IN and DVR EN* inputs, a trinary driver with tristate is realizable (see Figure 8).
Driver with Pull Up/Pull Down
DUT HIGH - DUT LOW* High Threshold
DUT + - Low Threshold
As the drivers are unbuffered, paralleling two drivers for one DUT node provides a means for adding pull up or pull down capability. By connecting the VHIGH and VLOW inputs of one driver through a resistor to a voltage, additional functionality that would normally require an external relay on the DUT transmission line to engage and disengage these functions is realizable. One common application for the pull up feature is testing open collector devices. The pull down satisfies open emitter DUTs (typically ECL). Either the pull up or down could be used to establish a default high impedance voltage on a bidirectional bus. Notice that in all applications, the resistors can be switched dynamically or statically.
Figure 7. Edge649 as a Window Comparator
Once two receivers are connected as window comparators, the two drivers also get connected in parallel. This dual driver configuration supports a multitude of applications that have traditionally been difficult to accommodate.
DATA IN A
DVR EN*A VHIGH B DUT
DATA IN B
DVR EN*B
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+
VHIGH A
VLOW A
VHIGH B VHIGH A VLOW A
Figure 8. Trinary Driver
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Edge649
TEST AND MEASUREMENT PRODUCTS Application Infor mation (continued)
Also, either the pull up or pull down resistor could be used to terminate the transmission from the DUT to the pin electronics in an effort to minimize any reflections.
VHIGH A VLOW A
Two Logic Family Driver Many test systems support exactly two families of driver and receiver levels and select between family A and family B settings on a per-pin basis, typically using an analog multiplexer, (See Figure 11.) Common examples of these families are: Family A = TTL Family B = CMOS or Family A = TTL Family B = ECL The Edge649 supports this system architecture with minimal hardware and the elimination of the per-pin analog multiplexer. The drive and receive levels need to be generated once per system, then distributed and buffered suitably.
DATA IN A
DUT
DVR EN*A VHIGH B VPULL UP DATA IN B VPULL DOWN VLOW B
DVR EN*B
Figure 9. Driver with Pull Up/Pull Down
Trinary Driver with Termination Other combinations are also possible. For example, two parallel drivers can be configured to implement one trinary driver with a pull down (or pull up) dynamic termination (see Figure 10).
VHIGH A VLOW A
Parametric Functions Two drivers in parallel also offer the possibility of connecting force and sense parametric circuitry to the DUT without adding additional circuitry to the controlled impedance DUT line. For example, Figure 12 shows the second driver being utilized to force a current and measure a voltage. Notice that the VHIGH and VLOW pins are used from different drivers to allow the force and sense functions to be active simultaneously.
DATA IN A
DVR EN*A VHIGH B VTERMINATION DATA IN B DUT
DVR EN*B
Figure 10. Trinary Driver with Termination
CHANNEL 1 VHIGH A VHIGH B
CHANNEL n
DVR EN*A
DVR EN*A
DVR DATA
DVR DATA
DUT0 DVR EN*B DVR EN*B
DUT0
VLOW B VLOW A
Figure 11. Family A/B Using Two Drivers Per Pin
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Edge649
TEST AND MEASUREMENT PRODUCTS Application Infor mation (continued)
Optional Output Configuration Certain functional applications require a series output resistor yet also demand that the comparator be connected directly to the DUT, not via the backmatch resistor. To create this configuration, two distinct termination resistors may be connected to the VHIGH and VLOW input pins (see Figure 13).
VHIGH
PROGRAMMABLE CURRENT SOURCE
VHIGH DUT VLOW
DATA IN A
DATA EN* A VLOW
VOLTAGE MEASUREMENT UNIT
DUT
DATA IN B
DATA EN* B
Figure 12. Edge649 Supporting Parametric Testing
Figure 13. Functional Application with the Comparator Connected Directly to the DUT
Thermal Information
Parameter T hermal R esist anc e Junc t ion t o C ase Junc t ion t o A ir St ill A ir 50 LF P M 400 LF P M
Symbol JC
Min
Typ 9.8
Max
Units
oC / W
JA JA JA
34 26 19
oC / W oC / W oC / W
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Edge649
TEST AND MEASUREMENT PRODUCTS Package Infor mation
68 Pin PLCC Package JA = 42 to 48C / W
0.990 SQ [25.146]
PIN Descriptions
0.953 SQ [24.206] 0.045 SQ [1.143]
0.048 [1.219]
See Detail A
0.800 REF [20.32]
0.910 [23.114]
0.175 [4.445]
0.113 [2.87]
0.016 [0.406]
0.029 [0.736]
0.029 [0.736]
0.016 [0.406]
0.020 [0.508] MIN
; ; ;
10
0.065 [1.651]
0.030 [0.762]
Notes: (unless otherwise specified) 1. Dimensions are in inches [millimeters]. 2. Tolerances are: .XXX 0.005 [0.127]. 3. PLCC packages are intended for surface mounting on solder lands on 0.050 [1.27] centers.
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Edge649
TEST AND MEASUREMENT PRODUCTS Recommended Operating Conditions
Parameter Digital Power Supply Analog Positive Power Supply Analog Negative Power Supply Total Analog Power Supply Ambient Operating Temperature Symbol VDD VCC VEE VCC - VEE TA TJ Min 4.5 VDD + 2.0 -3 7.0 0 0 Typ 5 Max 5. 5 11 0 11 +70 +125 Units V V V V
oC oC
Absolute Maximum Ratings
Parameter T ot al A nalog P ow er Supply P osit iv e A nalog P ow er Supply Neg at iv e A nalog P ow er Supply Driv er Hig h Out put V olt ag e Driv er Low Out put V olt ag e Driv er Out put Sw ing R ec eiv er T hreshold V olt ag e Dig it al I nput s Dig it al P ow er Supply A mbient Operat ing T emperat ure St orag e T emperat ure Junc t ion T emperat ure Soldering T emperat ure Symbol V C C - V EE VCC V EE VH I G H VLO W VH I G H - VLO W T HR ESHOLD DA T A I N DV R EN* V DD TA TS TJ T SOL +5.0 -4.0 V EE - .5 V EE - .5 -5 V EE - .5 GND - .5 0 -55 -65 Min Typ Max 13 13 0.5 V C C + .5 V C C + .5 12 V C C + .5 V DD + .5 6.5 +125 +150 +150 260 Units V V V V V V V V V
oC oC oC oC
Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only, and functional operation of the device at these, or any other conditions beyond those listed, is not implied. Exposure to absolute maximum conditions for extended periods may affect device reliability.
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Edge649
TEST AND MEASUREMENT PRODUCTS DC Characteristics
Parameter Driver/Receiver Characteristics Driver High Voltage Level @ 1 mA @ 125 mA Driver Low Voltage Level @ 1 mA @ 125 mA DC Driver Output Current (Note 1) Driver Output Impedance @ 1 mA @ 125 mA DUT Pin Capacitance DUT Output voltage Receiver Threshold Level Threshold Bias Current DUT Leakage Input Current Receiver Offset Voltage Quiescent Power Supply Current Positive Power Supply Negative Power Supply Digital Power Supply Digital Inputs DATA IN (0:7), DVR EN* (0:7) Input High Voltage Input Low Voltage Input Current Input Capacitance Digital Outputs DATA OUT (0:7) Output Voltage High (Note 2) Output Voltage Low (Note 3) DC Output current VOH VOL IOUT -4 VDD - .4 GND + .4 4 V V mA VIHMIN VILMAX IIN CIN 5 2.0 0.8 1.0 V V A pF VHIGH VEE + 3 VEE + 7 VLOW VEE VEE IOUT ROUT 8 COUT DUT<0:7> VTHRESHOLD IBIAS ILEAK VOS ICC IEE IDD - 200 VEE VEE + 0.1 0 .002 45 25 25 20 20 VCC VCC - 3.5 1.0 1.0 200 40 40 35 40 17 - 125 VCC - 3 VCC - 7 +125 V V mA pF V V A A mV mA mA mA VCC VCC V V Symbol Min Typ Max Units
Note 1 : Note 2: Note 3:
Output current specification is per individual driver. Output current of 4 mA. Output current of -4 mA.
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Edge649
TEST AND MEASUREMENT PRODUCTS AC Characteristics
Parameter Propagation Delay DATA IN <0:7> to DUT <0:7> (Note 2) DUT <0:7> to DATA OUT <0:7> (Note 3) Active to HiZ (Note 4) HiZ to Active (Note 4) DUT Output Rise/Fall Times (Note 1) 1V Swing (20% - 80%) 3V Swing (10% - 90%) 5V Swing (10% - 90%) 8V Swing (10% - 90%) 10V Swing (10% - 90%) Digital Outputs (DATA OUT <0:7>) DATA OUT Rise Time (10% - 90%) DATA OUT Fall Time (10% - 90%) Minimum Pulse Width Driver Output Comparator Output Maximum Operating Frequency Fmax Symbol Min Typ Max Units
T1 T2 T3 T4
12 8 17 12
20 15 25 20
33 27 38 33
ns ns ns ns
3.0 3.5 4.0 4.5 5.0
ns ns ns ns ns
TR TF
2 2
ns ns
20 10 50
ns ns MHz
AC Test Conditions: VCC = 8V, VEE = -3V, VDD = 5V. Note 1: Note 2: Note 3: Note 4: Into 18 inches of 50 transmission line terminated with 1K and 5 pF with the proper series termination resistor. Measured at 2.5V with a 10 mA load under the following conditions: VHIGH = +5.0V, VLOW = 0V, VCC = +8V, VEE = -3V, and VDD = +5V. Measured at 2.5V with a 4 mA load. Load = 10 mA and measured when a 500 mV change at the output is detected.
T1 DATA IN T2
DUT
DATA OUT
DVR EN*
DUT T3
HiZ T4
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Edge649
TEST AND MEASUREMENT PRODUCTS Ordering Infor mation
Model Number E649APJ
Package 68-Pin PLCC
EVM649APJ
Edge649 Evaluation Module
Contact Infor mation
Semtech Corporation Test and Measurement Division 10021 Willow Creek Rd., San Diego, CA 92131 Phone: (858)695-1808 FAX (858)695-2633
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Edge649
TEST AND MEASUREMENT PRODUCTS Revision History
Current Revision Date: October 21, 2002 Previous Revision Date: June 11, 2002
Page # 6 Section Name Power Supplies Previous Revision Current Revision Para 1 rewritten. Para 2 deleted. Power On & Off Sequencing added
Current Revision Date: June 11, 2002 Previous Revision Date: December 6, 2001
Page # 2 14 Section Name Pin Descriptions Ordering Information Previous Revision VLOW E649BPJ EVM649EVM Current Revision Change Pin #44 to Pin #47 E649APJ EVM649APJ
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Edge649
TEST AND MEASUREMENT PRODUCTS Revision History
Current Revision Date: December 6, 2001 Previous Revision Date: October 28, 1996
Page # 4 11
Section Name Circuit Description Recommended Operating Conditions
Previous Revision Table 1
Current Revision Update Threshold Ranges Delete: Driver High Output Voltage Driver Low Output Voltage Total Driver Output Swing Receiver Threshold Voltage
Analog Positive Power Supply, Min: VDD + 1.5 Total Analog Power Supply, Min: 6.5 12 DC Characteristics
Analog Positive Power Supply, Min: VDD + 2.0 Total Analog Power Supply, Min: 7.0 Add: Driver High Voltage Driver Low Voltage Driver Output Impedance Delete: Driver Headroom Delete: Output Voltage Swing
Driver High Voltage @ 1 mA, Min: VEE @ 125 mA, VEE + 6 Driver Low Voltqge @ 1 mA, Max: VCC @ 125 mA, Max: VCC - 6 Driver Output Impedance @ 1 mA, Max: TBD @ 125 mA, Max: 12 Receiver Threshold Level, Max: VCC - 1.5 Receiver Offset Voltage, Min: -100, Typ: +25, Max: 100 13 AC Characteristics
Driver High Voltage Level @ 1 mA, Min: VEE + 3 @ 125 mA, VEE + 7 Driver Low Voltqge Level @ 1 mA, Max: VCC - 3 @ 125 mA, Max: VCC - 7 Driver Output Impedance @ 1 mA, Max: 40 @ 125 mA, Max: 17 Receiver Threshold Level, Max: VCC - 3.5 Receiver Offset Voltage, Min: -200, Typ: 45, Max: 200 Add: AC Test Conditions
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