HIGH-PERFORMANCE IMPACT-X PAL CIRCUITS
TIBPAL20L8-10C, TIBPAL20R4-10C, TIBPAL20R6-10C, TIBPAL20R8-10C HIGH-PERFORMANCE IMPACT-X ™ PAL® CIRCUITS
• High-Perform...
Description
TIBPAL20L8-10C, TIBPAL20R4-10C, TIBPAL20R6-10C, TIBPAL20R8-10C HIGH-PERFORMANCE IMPACT-X ™ PAL® CIRCUITS
High-Performance Operation:
fmax (no feedback) TIBPAL20R’ . . . 71.4 MHz
fmax (internal feedback) TIBPAL20R’ . . . 58.8 MHz
fmax (external feedback) TIBPAL20R’ . . . 55.5 MHz
Propagation Delay TIBPAL20’ . . . 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 Plastic Chip
Carriers in Addition to Plastic and Ceramic DIPs
Security Fuse Prevents Duplication
Dependable Texas Instruments Quality and
Reliability
DEVICE
I 3-STATE INPUTS O OUTPUTS
PAL20L8 PAL20R4 PAL20R6 PAL20R8
14 12 12 12
2 0 0 0
REGISTERED Q OUTPUTS
0 4 (3-state buffers) 6 (3-state buffers) 8 (3-state buffers)
I/O PORT
S
6
4
2
0
SRPS008A – D3336, OCTOBER 1989 – REVISED MARCH 1992
TIBPAL20L8’ JT OR NT PACKAGE
(TOP VIEW)
I I I I I I I I I I I GND
1 2 3 4 5 6 7 8 9 10 11 12
24 VCC 23 I 22 O 21 I/O 20 I/O 19 I/O 18 I/O 17 I/O 16 I/O 15 O 14 I 13 I
TIBPAL20L8’ FN PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
I5
25 I/O
I6
24 I/O
I7
23 I/O
NC 8
22 NC
I9
21 I/O
I 10
20 I/O
I 11
19 I/O
12 13 14 15 16 17 18
II II GND I NC NC I VCC II OO
description
These programmable array logic devices feature high speed and functional equivalency when
NC – No internal conne...
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