SN74BCT543 Datasheet, PDF (1/13 Pages) Texas Instruments – OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54BCT543, SN74BCT543
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS026C – NOVEMBER 1988 – REVISED APRIL 1994
• State-of-the-Art BiCMOS Design
Significantly Reduces I_CCZ
• 3-State True Outputs
• Back-to-Back Registers for Storage
• ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
• Package Options Include Plastic
Small-Outline Packages (DW), Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (JT, NT)
description
The ′BCT543 octal transceiver contains two sets
of D-type latches for temporary storage of data
flowing in either direction. Separate latch-enable
(LEAB or LEBA) and output-enable (OEAB or
OEBA) inputs are provided for each register to
permit independent control in either direction of
data flow.
SN54BCT543 . . . JT OR W PACKAGE
SN74BCT543 . . . DW OR NT PACKAGE
(TOP VIEW)
LEBA 1
OEBA 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
A8 10
CEAB 11
GND 12
24 V_CC
23 CEBA
22 B1
21 B2
20 B3
19 B4
18 B5
17 B6
16 B7
15 B8
14 LEAB
13 OEAB
SN54BCT543 . . . FK PACKAGE
(TOP VIEW)
The A-to-B enable (CEAB) input must be low in
order to enter data from A or to output data from
B. If CEAB is low and LEAB is low, the A-to-B
latches are transparent; a subsequent low-to-high
transition of LEAB puts the A latches in the storage
mode. With CEAB and OEAB both low, the 3-state
B outputs are active and reflect the data present
at the output of the A latches. Data flow from B to
A is similar but requires using the CEBA, LEBA,
and OEBA inputs.
The SN54BCT543 is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The SN74BCT543 is characterized for
operation from 0°C to 70°C.
4 3 2 1 28 27 26
A2 ⁵
25 B2
A3 ⁶
24 B3
A4 ⁷
23 B4
NC ⁸
22 NC
A5 ⁹
21 B5
A6 ¹⁰
20 B6
A7 ¹¹
19 B7
12 13 14 15 16 17 18
NC – No internal connection
FUNCTION TABLE†
INPUTS
CEAB LEAB OEAB A
OUTPUT
B
H
X
X
X
Z
X
X
H
X
Z
L
H
L
X
B0‡
L
L
L
L
L
L
L
L
H
H
† _{A-to-B data flow is shown; B-to-A flow control is the}
same except that it uses CEBA, LEBA, and OEBA.
‡ _{Output level before the indicated steady-state input}
conditions were established.
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 DALLAS, TEXAS 75265
Copyright © 1994, Texas Instruments Incorporated
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