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TIBPAL20R4-10C Datasheet

  • TIBPAL20R4-10C

  • HIGH-PERFORMANCE IMPACT-X PAL CIRCUITS

  • 24頁

  • TI

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TIBPAL20L8-10C, TIBPAL20R4-10C, TIBPAL20R6-10C, TIBPAL20R8-10C
HIGH-PERFORMANCE
IMPACT-X
鈩?/div>
PAL
廬
CIRCUITS
SRPS008A 鈥?D3336, OCTOBER 1989 鈥?REVISED MARCH 1992
鈥?/div>
High-Performance Operation:
f
max
(no feedback)
TIBPAL20R鈥?. . . 71.4 MHz
f
max
(internal feedback)
TIBPAL20R鈥?. . . 58.8 MHz
f
max
(external feedback)
TIBPAL20R鈥?. . . 55.5 MHz
Propagation Delay
TIBPAL20鈥?. . . 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
PAL20L8
PAL20R4
PAL20R6
PAL20R8
I
INPUTS
14
12
12
12
3-STATE
O OUTPUTS
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
TIBPAL20L8鈥?/div>
JT OR NT PACKAGE
(TOP VIEW)
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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
23
22
21
20
19
18
17
16
15
14
13
V
CC
I
O
I/O
I/O
I/O
I/O
I/O
I/O
O
I
I
TIBPAL20L8鈥?/div>
FN PACKAGE
(TOP VIEW)
I
I
I
NC
I
I
I
5
6
7
8
9
10
I
I
I
NC
V
CC
I
O
4
3 2 1 28 27 26
25
24
23
22
21
20
11
19
12 13 14 15 16 17 18
I/O
I/O
I/O
NC
I/O
I/O
I/O
description
These programmable array logic devices feature
NC
鈥?/div>
No internal connection
high speed and functional equivalency when
Pin assignments in operating mode
compared with currently available devices. These
IMPACT-X鈩?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鈥?C series is characterized from 0擄C to 75擄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.
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
鈥?/div>
DALLAS, TEXAS 75265
I
I
GND
NC
I
I
O
Copyright
漏
1992, Texas Instruments Incorporated
1

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