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E818AHF Schematic ( PDF Datasheet ) - Semtech Corporation

Teilenummer E818AHF
Beschreibung Octal 18V Pin Electronics Driver/window Comparator
Hersteller Semtech Corporation
Logo Semtech Corporation Logo 




Gesamt 12 Seiten
E818AHF Datasheet, Funktion
EDGE HIGH-PERFORMANCE PRODUCTS
Description
Edge818
Octal 18V Pin Electronics
Driver/window Comparator
Features
The Edge818 is an octal pin electronics driver and window
comparator fabricated in a wide voltage CMOS process.
It is designed specifically for Test During Burn In (TDBI)
applications, where cost, functional density, and power
are all at a premium.
The Edge818 incorporates eight channels of
programmable drivers and window comparators into one
14 mm X 20 mm 100 pin MQFP package. Each channel
has per pin driver levels, data, and high impedance
control. In addition, each comparator has per pin high
and low threshold levels.
The Edge818 uses "Flex In" and "Flex Out" digital inputs,
and can therefore mate directly with any digital technology
providing a minimum 2V swing. The digital outputs can
mate directly with any digital technology.
The 18V driver output and receiver input range allow the
Edge818 to interface directly with TTL, ECL, CMOS (3V,
5V, and 7V), LVCMOS, and custom level circuitry, as well
as the high voltage (Super Voltage) level required for
many special test modes for Flash Devices.
• 18V I/O Range
• 50 MHz Operation
• Per Pin Flexibility
• Programmable Input Thresholds
• Flex In Digital Inputs
• Flex Out Digital Outputs
• Small footprint (100 pin MQFP)
Applications
• Burn In ATE
• Low Cost ATE
• Instrumentation
Functional Block Diagram
VH VL
DATA
EN*
QA
COMP HIGH
COMP LOW
QB
8
8
8
8
8
DOUT
8
CVA
+
8
VINP
+8
CVB
Revision 1/ May 23, 2000
1
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E818AHF Datasheet, Funktion
Edge818
EDGE HIGH-PERFORMANCE PRODUCTS
Application Information
Power Supply Decoupling
VCC and VEE should 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.
VH and VL Decoupling
must always be positive (above ground), and VEE must
always be negative (at or below ground).
The three diode configuration shown in Figure 5 should
be used on a once-per-board basis.
As the VH and VL inputs are unbuffered and supply the
driver output current, which can be quite large during
edge transitions, decoupling capacitors for these inputs
are recommended in proportion to the amount of output
current requirements.
VCC
VDD
For applications where VH and VL are shared over multiple
channels, a solid power plane to distribute these levels
is preferred.
1N5820 or
Equivalent
VBB
The two VBB pins are connected together on-chip.
Therefore, only one VBB needs to be connected to for
proper 818 operation.
The two pins may be used to daisy chain a VBB signal
across a PC Board without having to route the actual
signal underneath the 818.
Latchup Protection
The Edge818 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 (external supply
for the digital logic) at all times. Both VCC and VDD
VEE
Figure 5.
Power Supply Protection Scheme
gure 5.
Warning: It is extremely important that the voltage on
any device pin does not exceed the range of VEE –
0.5V to VCC +0.5V at any time, either during power up,
normal operation, or during power down. Failure to
adhere to this requirement could result in latchup of
the device, which could be destructive if the system
power supplies are capable of supplying large amounts
of current. Even if the device is not immediately
destroyed, the cumulative damage caused by the stress
of repeated latchup may affect device reliability.
2000 Semtech Corp.
6
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E818AHF pdf, datenblatt
EDGE HIGH-PERFORMANCE PRODUCTS
Ordering Information
Model Number
E818AHF
EVM818AHF
Package
100 Lead MQFP
14 mm x 20 mm Body Size
w/Internal Heat Spreader
Edge818 Evaluation Board
Edge818
Contact Information
2000 Semtech Corp.
Semtech Corporation
Edge High-Performance Division
10021 Willow Creek Rd., San Diego, CA 92131
Phone: (858)695-1808 FAX (858)695-2633
12
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