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E649BPJ Schematic ( PDF Datasheet ) - Semtech Corporation

Teilenummer E649BPJ
Beschreibung Octal Pin Electronics Driver/Receiver
Hersteller Semtech Corporation
Logo Semtech Corporation Logo 




Gesamt 14 Seiten
E649BPJ Datasheet, Funktion
EDGE HIGH-PERFORMANCE PRODUCTS
Description
Features
Edge649
Octal Pin Electronics
Driver/Receiver
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.
• 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
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.
Functional Block Diagram
VHIGH VLOW
88
Applications
• Burn-In ATE
• Functional Board Testers
• In-Circuit Board Testers
• Combinational Board Testers
• Low Cost Chip Testers
• ASIC Verifiers
• VXI-Based Test Equipment
DATA IN
8
DVR EN*
8
DATA OUT
8
+
8
DUT
8
THRESHOLD
Revision 1/ October 28, 1996
1
www.semtech.com






E649BPJ Datasheet, Funktion
Edge649
EDGE HIGH-PERFORMANCE PRODUCTS
Application Information
Power Supplies
The Edge649 uses three power supplies VDD, VCC
and VEE. VDD, typically +5V, is the digital supply for all
of the data inputs and outputs. VCC and VEE are the
analog power supplies for the DUT drivers and
comparators. VCC ranges from +6.5V to +11V, and must
be greater than or equal to VDD + 1.5V. VEE is the
negative analog power and typically varies from 0V to
3V.
VCC and VEE, which power the DUT drivers and receivers,
should also be decoupled to GND with a .1 µF chip
capacitor in parallel with a .001 µF chip capacitor. A
VCC and VEE plane, or at least a solid power bus, is
recommended for optimal performance.
VHIGH and VLOW Decoupling
The Edge649 has several power supply requirements to
protect the part in power supply fault situations, as well
as during power up and power down sequences. VCC
must remain greater than or equal to VDD at all times.
Both VCC and VDD must always be positive (above
ground), and VEE must always be negative (at or below
ground).
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
Expanding the Common Mode Range
The three-diode configuration shown in Figure 5, used
on a once-per-board basis, insures power supply
sequence and fault tolerance.
VCC
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).
VDD
1N5820 or
Equivalent
V1
VCC
VEE
Figure 5.
Power Supply Protection Scheme
Edge 649
VDD
V2
Power Supplies Decoupling
Figure 6.
VDD, which provides the digital power, should be
decoupled to GND with a .1 µF chip capacitor in parallel
with a .001 µF 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.
There are three rules which govern the supplies V1 and
V2:
1) VDD + 1.5V V1 +11V
2) 3V V2 0V
3) (V1 V2) 11V
2000 Semtech Corp.
6
www.semtech.com

6 Page









E649BPJ pdf, datenblatt
EDGE HIGH-PERFORMANCE PRODUCTS
DC Characteristics
Edge649
Parameter
Driver/Receiver Characteristics
Output Voltage Swing
DC Driver Output Current (Note 1)
Output Impedance
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
Driver Headroom
Driver High to VEE
Driver Low to VCC
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
Symbol
Min
VHIGH - VLOW
IO U T
RO U T
CO U T
DUT<0:7>
VT H R E S H O L D
0
-125
3
VEE
VEE + 0.1
IB IA S
VOS
ICC
IEE
IDD
VHIGH - VEE
VCC - VLOW
-100
2.5
3.0
VIHM IN
VILM A X
IIN
CIN
2.0
VOH
VOL
IO U T
VDD - .4
-4
Typ
8
20
0
.002
+25
25
25
20
5
Max
Units
11
+125
12
VCC
VCC - 1.5
1.0
1.0
100
40
40
35
V
mA
pF
V
V
µA
µA
mV
mA
mA
mA
V
V
V
0.8 V
1.0 µA
pF
GND + .4
4
V
V
mA
Note 1 : Output current specification is per individual driver.
Note 2: Output current of 4 mA.
Note 3: Output current of 4 mA.
2000 Semtech Corp.
12
www.semtech.com

12 Page





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