SN54ABT2952 Datasheet, PDF (1/7 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

SN54ABT2952, SN74ABT2952
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3ĆSTATE OUTPUTS
SCBS202 − NOVEMBER 1990 − REVISED OCTOBER 1992
• State-of-the-Art EPIC-ΙΙB  BiCMOS Design
Significantly Reduces Power Dissipation
• ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
• Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
• Two 8-Bit Back-to-Back Registers Store
Data Flowing in Both Directions
• Noninverting Outputs
• Typical V_OLP (Output Ground Bounce)
< 1 V at V_CC = 5 V, T_A = 25°C
• Package Options Include Plastic
Small-Outline (SOIC) and Shrink
Small-Outline (SSOP) Packages, Ceramic
Chip Carriers, and Plastic and Ceramic
DIPs
SN54ABT2952 . . . JT PACKAGE
SN74ABT2952 . . . DB, DW, OR NT PACKAGE
(TOP VIEW)
B8 1
B7 2
B6 3
B5 4
B4 5
B3 6
B2 7
B1 8
OEAB 9
CLKAB 10
CLKENAB 11
GND 12
24 V_CC
23 A8
22 A7
21 A6
20 A5
19 A4
18 A3
17 A2
16 A1
15 OEBA
14 CLKBA
13 CLKENBA
SN54ABT2952 . . . FK PACKAGE
(TOP VIEW)
description
The ′ABT2952 consists of two 8-bit back-to-back
registers that store data flowing in both directions
between two bidirectional buses. 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.
B5
B4
B3
NC
B2
B1
OEAB
4 3 2 1 28 27 26
5
25 A6
6
24 A5
7
23 A4
8
22 NC
9
21 A3
10
20 A2
11
19 A1
12 13 14 15 16 17 18
To ensure the high-impedance state during power
up or power down, OE should be tied to V_CC
through a pullup resistor; the minimum value of the
resistor is determined by the current-sinking
capability of the driver.
NC − No internal connection
The SN74ABT2952 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count
and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54ABT2952 is characterized for operation over the full military temperature range of −55°C to 125°C.
The SN74ABT2952 is characterized for operation from − 40°C to 85°C.
EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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Copyright  1992, Texas Instruments Incorporated
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