SN54ABT543A ,Octal Registered Transceiver With 3-State Outputs SN54ABT543A, SN74ABT543A OCTAL REGISTERED TRANSCEIVERSWITH 3-STATE OUTPUTSSCBS157F – JANUARY 1991 ..
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SN54ABT543A
Octal Registered Transceiver With 3-State Outputs
Typical VOLP (Output Ground Bounce) < 1 Vat VCC = 5 V, TA = 25°C High-Drive Outputs (–32-mA IOH, 64-mA IOL) Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flat (W) Package, and Plastic (NT)
and Ceramic (JT) DIPs
descriptionThe ’ABT543A octal transceivers contain 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 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 VCCthrough a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
The SN54ABT543A is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABT543A is characterized for operation from –40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
CEAB
GND
LEAB
OEAB
SN54ABT543A... FK PACKAGE
(TOP VIEW)CEAB
GND
OEAB
LEABOEBALEBANC CEBAB1
NC – No internal connection
