SN54ABTH32543_08 Datasheet, PDF (3/11 Pages) Texas Instruments – 36-BIT REGISTERED BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54ABTH32543, SN74ABTH32543
36-BIT REGISTERED BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS230F – JUNE 1992 – REVISED MAY 1997
description (continued)
When V_CC is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 2.1 V, 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.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN54ABTH32543 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABTH32543 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE†
(each 18-bit section)
CEAB
INPUTS
LEAB OEAB
OUTPUT
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
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