
TIBPAL20L8-7C, TIBPAL20R4-7C, TIBPAL20R6-7C, TIBPAL20R8-7C
TIBPAL20L8-10M TIBPAL20R4-10M TIBPAL20R6-10M TIBPAL20R8-10M
HIGH-PERFORMANCE
IMPACT-X
PAL
CIRCUITS
SRPS005D – D3307, OCTOBER 1989 – REVISED NOVEMBER 1995
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Copyright
1995, Texas Instruments Incorporated
1
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard
warranty. Production processing does not necessarily include testing of all
parameters.
High-Performance Operation:
f
max
(no feedback)
TIBPAL20R’ -7C Series . . . 100 MHz
TIBPAL20R’ -10M Series . . . 62.5 MHz
f
max
(internal feedback)
TIBPAL20R’ -7C Series . . . 100 MHz
TIBPAL20R’ -10M Series . . . 62.5 MHz
f
max
(external feedback)
TIBPAL20R’ -7C Series . . . 74 MHz
TIBPAL20R’ -10M Series . . . 50 MHz
Propagation Delay
TIBPAL20L8-7C Series . . . 7 ns Max
TIBPAL20L8-10M Series . . . 10 ns Max
Functionally Equivalent, but Faster Than
Existing 24-Pin PLD Circuits
Preload Capability on Output Registers
Simplifies Testing
Power-Up Clear on Registered Devices (All
Register Outputs are Set Low, but Voltage
Levels at the Output Pins Go High)
Package Options Include Both Plastic and
Ceramic Chip Carriers in Addition to Plastic
and Ceramic DIPs
Security Fuse Prevents Duplication
Dependable Texas Instruments Quality and
Reliability
DEVICE
I
INPUTS
3-STATE
O OUTPUTS
REGISTERED
Q OUTPUTS
I/O
PORT
S
6
4
2
0
PAL20L8
PAL20R4
PAL20R6
PAL20R8
14
12
12
12
2
0
0
0
0
4 (3-state buffers)
6 (3-state buffers)
8 (3-state buffers)
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 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.
All of the register outputs are set to a low level during power-up. Extra circuitry has been provided to allow loading
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. The TIBPAL20’ M series is characterized for
operation over the full military temperature range of –55
°
C to 125
°
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.
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
I
I
I
I
I
I
I
I
I
I
I
GND
V
CC
I
O
I/O
I/O
I/O
I/O
I/O
I/O
O
I
I
TIBPAL20L8’
C SUFFIX . . . JT OR NT PACKAGE
M SUFFIX . . . JT PACKAGE
(TOP VIEW)
3 2 1 28 27
12 13
5
6
7
8
9
10
11
25
24
23
22
21
20
19
I/O
I/O
I/O
NC
I/O
I/O
I/O
I
I
I
NC
I
I
I
4
26
14 15 16 1718
I
I
G
N
I
I
O
I
I
I
N
I
O
TIBPAL20L8’
C SUFFIX . . . FN PACKAGE
M SUFFIX . . . FK PACKAGE
(TOP VIEW)
NC
–
No internal connection
Pin assignments in operating mode
V
C