TIBPAL20L8-10C, TIBPAL20R4-10C, TIBPAL20R6-10C, TIBPAL20R8-10C
HIGH-PERFORMANCE IMPACT-X PAL CIRCUITS
SRPS008A – D3336, OCTOBER 1989 – REVISED MARCH 1992
TIBPAL20L8’
JT OR NT PACKAGE
•
High-Performance Operation:
f
f
f
(no feedback)
TIBPAL20R’ . . . 71.4 MHz
(internal feedback)
TIBPAL20R’ . . . 58.8 MHz
(external feedback)
TIBPAL20R’ . . . 55.5 MHz
max
(TOP VIEW)
max
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V
I
O
I/O
I/O
I/O
I/O
I/O
I/O
O
1
24
23
22
21
20
19
18
17
16
15
14
13
CC
2
max
3
4
Propagation Delay
5
TIBPAL20’ . . . 10 ns Max
6
•
•
•
Functionally Equivalent, but Faster Than
Existing 24-Pin PLD Circuits
7
8
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9
Preload Capability on Output Registers
Simplifies Testing
10
11
12
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GND
Power-Up Clear on Registered Devices (All
Register Outputs are Set Low, but Voltage
Levels at the Output Pins Go High)
TIBPAL20L8’
FN PACKAGE
•
Package Options Include Plastic Chip
Carriers in Addition to Plastic and Ceramic
DIPs
(TOP VIEW)
•
•
Security Fuse Prevents Duplication
4
5
3
2
1
28 27 26
25
Dependable Texas Instruments Quality and
Reliability
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I/O
I/O
I/O
6
24
23
7
I/O
PORT
S
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3-STATE
REGISTERED
Q OUTPUTS
DEVICE
8
NC
22 NC
21 I/O
20 I/O
19 I/O
INPUTS O OUTPUTS
9
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PAL20L8
PAL20R4
PAL20R6
PAL20R8
14
12
12
12
2
0
0
0
0
6
4
2
0
10
11
4 (3-state buffers)
6 (3-state buffers)
8 (3-state buffers)
12 13 14 15 16 17 18
description
These programmable array logic devices feature
high speed and functional equivalency when
compared with currently available devices. These
IMPACT-X circuits combine the latest Advanced
NC – No internal connection
Pin assignments in operating mode
Low-Power Schottky technology with proven titanium-tungsten fuses to provide reliable, high-performance
substitutes for conventional TTL logic. Their easy programmability allows for quick design of custom functions
and typically results in a more compact circuit board. In addition, chip carriers are available for futher reduction
in board space.
Alloftheregisteroutputsaresettoalowlevelduringpowerup. Extracircuitryhasbeenprovidedtoallowloading
of each register asynchronously to either a high or low state. This feature simplifies testing because the registers
can be set to an initial state prior to executing the test sequence.
The TIBPAL20’ C series is characterized from 0°C to 75°C.
These devices are covered by U.S. Patent 4,410,987.
IMPACT-X is a trademark of Texas Instruments Incorporated.
PAL is a registered trademark of Advanced Micro Devices Inc.
PRODUCTION DATA information is current as of publication date.
Copyright 1992, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily
include testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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