SN54ABT16952, SN74ABT16952
16-BIT REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS082C – FEBRUARY 1991 – REVISED JANUARY 1997
SN54ABT16952 . . . WD PACKAGE
SN74ABT16952 . . . DGG OR DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
State-of-the-Art EPIC-ΙΙB BiCMOS Design
Significantly Reduces Power Dissipation
1OEAB
1CLKAB
1CLKENAB
GND
1OEBA
1
2
3
4
5
6
7
8
9
56
Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
55 1CLKBA
54 1CLKENBA
53 GND
Typical V
(Output Ground Bounce) < 1 V
OLP
1A1
1A2
52 1B1
at V
= 5 V, T = 25°C
CC
A
51 1B2
Distributed V
Minimizes High-Speed Switching Noise
and GND Pin Configuration
CC
V
50
V
CC
CC
1A3
1A4
1A5 10
GND 11
1A6 12
49 1B3
48 1B4
47 1B5
46 GND
45 1B6
Flow-Through Architecture Optimizes PCB
Layout
High-Drive Outputs (–32-mA I , 64-mA I
OH
)
OL
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
description
The ’ABT16952 are 16-bit registered transceivers
that contain two sets of D-type flip-flops for
temporary storage of data flowing in either
direction. The’ABT16952canbeusedastwo8-bit
transceivers or one 16-bit transceiver. Data on the
A or B bus is stored in the registers on the
low-to-high transition of the clock (CLKAB or
CLKBA) input provided that the clock-enable
(CLKENAB or CLKENBA) input is low. Taking the
output-enable (OEAB or OEBA) input low
accesses the data on either port.
V
V
CC
CC
2A7
2A8
GND
2B7
2B8
GND
2CLKENBA
2CLKBA
2OEBA
2CLKENAB
2CLKAB
2OEAB
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54ABT16952 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABT16952 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.
Widebus and EPIC-ΙΙB are trademarks of Texas Instruments Incorporated.
Copyright 1997, 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.
1
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