Signetics Programmable Logic Devices - Al Kossow's Bitsavers

Signefics
Document No. 853-0960
ECN No. 97887
Date of Issue October 16, 1989
Status Product Specification
-
,programmable LogiC -ueVlces
PLHS 16L8AJB
Programmable AND Array Logic
(16 x 64 x 8)
DESCRIPTION
The PLHS16L8A is a high-speed "A" version,
and the PLHS16L8B is a very highspeed
"B"version PAL@-typedevice. The
sum of products (AND-OR) architecture is
comprised of 64 AND gates and 8 OR
gates. The Signetics PLHS16L8AIB devices
offer 100% functional compatibility
with other PAL 16L8 devices. Specified at
a tpD of 20ns (maximum), the PLHS 16L8A
is 20% faster than other "A" version PAL
16L8 devices, and consumes 20% less
power than most other "A" speed 16L8devices.
The PLHS16L8B, specffied at
155mA Icc (maximum), consumes 20%
less power than other "B" version PAL
16L8 devices.
All AND gates are linked to 10 dedicated
inputs, 6 bidirectionalI/O and 2 dedicated
outputs. On-chip buffers couple eithertrue
(I, B) or complement (1. "8) input polarities
to all AND gates. The 64 AND gates are
separated into eight groups of eight product
terms each. Within each group, seven
of the AND terms are OR'ed together,
while the eighth is used to control the
3-State function olthe bidirectionalI/O. All
outputs (bidirectional and dedicated) are
inverting.
In the virgin state, the AND array fuses are
back-to-back CB-EB diode pairs which act
as open connections. Current is avalanched
across individual diode pairs during
fusing, which essentially short circuits
the EB diode and provides the connection
for the associated product term.
The PLHS 16L8AIB is field-programmable,
allowing the user to quickly generate
custom patterns using standard
programming equipment.
Order codes are listed in the Ordering
Information Table.
FEATURES
• "A" version 100% functionally and
pin-for-pin compatible with
AmPAL16L8A, MMI PAL16L8A,
TlBPAL16L8-25, and
NSC PAL 16LBA devices
- 20% faster than other "A" version
PAL devices
- t pD = 20ns (max)
• "B" version 100% functionally and
pin-for-pin compatible with
AmPAL16L8B, MMI PAL16L8B,
TlBPAL 16L8-15 and NSC PAL1618B
devices
- Consumes 20% less power than
other "B" version PAL devices
- 155mA Icc (worst case)
- 110 propagation delay: 15ns (max)
("B" verSion)
• Field-programmable
• 10 dedicated inputs
• 8 outputs
- 6 bidirectional 110
- 2 dedicated outputs
• Individual 3-State control of all
outputs
• 64 AND gates/product terms
• Security fuse
PIN CONFIGURATIONS
APPLICATIONS
N Package
A Package
10 vee 07
Ia GND 19 00 B,
.100% functional replacement for
20-pin 16L8 combinatorial PAL devicas
• Random logic
• Code converters
• Fault detectors
• Function generators
• Address mapping/decoding
• Multiplexing
® PAL is a registered trademark of Monolithic Memories. Inc., a wholly owned subsidiary of Advanced Micro DevIces, Inc.
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PHILIPS