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PDF E749BPJ Data sheet ( Hoja de datos )
| Número de pieza | E749BPJ | |
| Descripción | Octal Pin Electronics Driver/Receiver | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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EDGE HIGH-PERFORMANCE PRODUCTS
Description
Features
Edge749
Octal Pin Electronics
Driver/Receiver
The Edge749 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 Edge749 incorporates eight channels of
programmable drivers and receivers into one package.
Each channel has per pin driver levels, receiver threshold,
and tristate control.
• 20 MHz Operation
• 18 V DUT I/O Range
• Programmable Output Levels
• Programmable Input Thresholds
• Per Pin Flexibility
• High Integration Levels
• Low Power Dissipation
• Edge 648 and 649 Compatible
The 18V driver output and receiver input range allows
the Edge749 to interface directly between TTL, ECL,
CMOS (3V, 5V, and 8V), very high voltage, and custom
level circuitry.
The Edge749 is pin and functionally compatible with the
Edge648 and Edge649.
Functional Block Diagram
Applications
• Burn-In ATE
• Functional Board Testers
• In-Circuit Board Testers
• Combinational Board Testers
• Low Cost Chip Testers
• ASIC Verifiers
• VXI-Based Test Equipment
VHIGH
VLOW
88
DATA IN
8
DVR EN*
8
DATA OUT
8
+
–
8
DUT
8
THRESHOLD
Revision 1/ June 23, 1998
1
www.semtech.com
1 page  
EDGE HIGH-PERFORMANCE PRODUCTS
Circuit Description (continued)
Driver Output Protection
In a functional testing environment, where a resistor is
added in series with the driver output (to create a 50Ω
output impedance), the Edge749 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
Edge749 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
2000 Semtech Corp.
5
Edge749
www.semtech.com
5 Page 
EDGE HIGH-PERFORMANCE PRODUCTS
Recommended Operating Conditions
Edge749
Parameter
Digital Power Supply
Analog Positive Power Supply
Analog Negative Power Supply
Total Analog Power Supply
Driver High Output Voltage
Driver Low Output Voltage
Total Driver Output Swing
Receiver Threshold Voltage
Ambient Operating Temperature
Symbol
VDD
VCC
VEE
VCC - VEE
VHIGH
VLOW
VHIGH - VLOW
THRESHOLD
TA
TJ
Min
4.5
10
-3
10
VEE
VEE
-18
VEE + 3
0
0
Typ
5
15
-2
Max
5.5
18
0
18
VCC
VCC
18
VCC - 3
+70
+125
Units
V
V
V
V
V
V
V
V
oC
oC
Absolute Maximum Ratings
Parameter
Total Analog Power Supply
Positive Analog Power Supply
Negative Analog Power Supply
Driver High Output Voltage
Driver Low Output Voltage
Driver Output Swing
Receiver Threshold Voltage
Digital Inputs
Digital Power Supply
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Soldering Temperature
Symbol
Min
Typ
Max
Units
VCC - VEE
19 V
VCC -.5
19 V
VEE -5
0.5 V
VHIGH
VLOW
VHIGH - VLOW
THRESHOLD
VEE - .5
VEE - .5
-18.5
VEE - .5
VCC + .5
VCC + .5
18.5
VCC + .5
V
V
V
V
DATA IN
DVR EN*
GND - .5
VDD + .5
V
VDD
TA
TS
TJ
TSOL
0
-55
-65
6.5
+125
+150
+150
260
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.
2000 Semtech Corp.
11 www.semtech.com
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| PDF Descargar | [ Datasheet E749BPJ.PDF ] | |
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