SN74ABT543A Datasheet, PDF (1/7 Pages) Texas Instruments – OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS

• 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
• Typical V_OLP (Output Ground Bounce) < 1 V
at V_CC = 5 V, T_A = 25°C
• High-Drive Outputs (–32-mA I_OH,
64-mA I_OL)
• Package Options Include Plastic
Small-Outline (DW) and Shrink
Small-Outline (DB) Packages, and Standard
Plastic 300-mil DIPs (JT)
SN74ABT543A
OCTAL REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS
SCBS464A – JUNE 1992 – REVISED JUNE 1994
DB, 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
description
The SN74ABT543A 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.
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.
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.
The SN74ABT543A is packaged 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 SN74ABT543A is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE†
INPUTS
OUTPUT
CEAB LEAB OEAB A
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.
EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.
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.
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Copyright © 1994, Texas Instruments Incorporated
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