Texas Instruments 74ACT16952DLR, 74ACT16952DL Datasheet
54ACT16952, 74ACT16952
16-BIT REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS159C – JANUARY 1991 – REVISED APRIL 1996
D
Members of the Texas Instruments
Widebus
D
Inputs Are TTL-Voltage Compatible
D
Noninverting Outputs
D
Two 16-Bit, Back-to-Back Registers Store
Family
Data Flowing in Both Directions
D
Flow-Through Architecture Optimizes
PCB Layout
D
Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D
EPIC
(Enhanced-Performance Implanted
CMOS) 1-µm Process
D
500-mA Typical Latch-Up Immunity at
125°C
D
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) Packages Using
25-mil Center-to-Center Pin Spacings and
380-mil Fine-Pitch Ceramic Flat (WD)
Packages Using 25-mil Center-to-Center
Pin Spacings
description
The ’ACT16952 are 16-bit registered transceivers
that contain two sets of D-type flip-flops for
temporary storage of data flowing in either
direction. They can be used as two 8-bit
transceivers or one 16-bit transceiver. Data on the
A or B bus is stored in registers on the low-to-high
transition of the clock (CLKAB or CLKBA) input,
provided that the clock-enable (CEAB
input is low. Taking the output-enable (OEAB or
OEBA
) input low accesses the data on either port.
or CEBA)
54ACT16952 . . . WD PACKAGE
74ACT16952 . . . DL PACKAGE
1OEAB
1CLKAB
1CEAB
2CEAB
2CLKAB
2OEAB
GND
1A1
1A2
V
CC
1A3
1A4
1A5
GND
1A6
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
V
CC
2A7
2A8
GND
(TOP VIEW)
1
56
2
55
3
54
4
53
5
52
6
51
7
50
8
49
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
25
32
26
31
27
30
28
29
1OEBA
1CLKBA
1CEBA
GND
1B1
1B2
V
CC
1B3
1B4
1B5
GND
1B6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
V
CC
2B7
2B8
GND
2CEBA
2CLKBA
2OEBA
To avoid false clocking of the flip-flops, CEAB (or
CEBA) should not be switched from low to high
while CLKAB (or CLKBA) is low.
The 74ACT16952 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and
functionality of standard small-outline packages in the same printed-circuit-board area.
The 54ACT16952 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74ACT16952 is characterized for operation from –40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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 • DALLAS, TEXAS 75265
Copyright 1996, Texas Instruments Incorporated
1
54ACT16952, 74ACT16952
16-BIT REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS159C – JANUARY 1991 – REVISED APRIL 1996
FUNCTION TABLE
INPUTS
CEAB
†
A-to-B data flow is shown; B-to-A data flow is
similar but uses CEBA
‡
Level of B before the indicated steady-state
input conditions were established
CLKAB OEAB A
H X L X B
X HLXB
L ↑ LL L
L ↑ LH H
X X H X Z
, CLKBA, and OEBA.
†
OUTPUT
B
‡
0
‡
0
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
54ACT16952, 74ACT16952
16-BIT REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS159C – JANUARY 1991 – REVISED APRIL 1996
logic symbol
†
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1A8
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2A8
56
54
55
1
3
2
29
31
30
28
26
27
5
6
8
9
10
12
13
14
15
16
17
19
20
21
23
24
EN3
G1
EN4
G2
EN9
G7
EN10
G8
3
6D
9
12D
10
5D
4
11D
52
51
49
48
47
45
44
43
42
41
40
38
37
36
34
33
1B1
1B2
1B3
1B4
1B5
1B6
1B7
1B8
2B1
2B2
2B3
2B4
2B5
2B6
2B7
2B8
1OEBA
1CEBA
1CLKBA 1C5
1OEAB
1CEAB
1CLKAB 2C6
2OEBA
2CEBA
2CLKBA 7C11
2OEAB
2CEAB
2CLKAB 8C12
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
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