OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTSThe BCT543 octal transceiver SN54BCT543 SN74BCT543 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.
The SN54BCT543 is characterized for operation
over the full military temperature range of 55C
to 125C. The SN74BCT543 is characterized for
operation from 0C to 70C. By Texas Instruments
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