IDT74FCT543ATEB Datasheet – CMOS Octal Latched Transceiver

Part Number: IDT74FCT543ATEB

Function: Fast CMOS Octal Latched Transceiver

Package: SOIC and QSOP Type

Manufacturer: Integrated Device Technology


IDT74FCT543ATEB datasheet



The FCT543T, IDT74FCT543ATEB is a non-inverting octal transceiver built using an advanced dual metal CMOS technology. This device contains two sets of eight D-type latches with separate input and output controls for each set. For data flow from A to B, for example, the A-to-B Enable (CEAB) input must be low in order to enter data from A0–A7or to take data from B0–B7, as indicated in the Function Table.

With CEABlow, a low signal on the A-to-B Latch Enable (LEAB) input makes the A-to-B latches transparent; a subsequent low-to high transition of the LEABsignal puts the A latches in the storage mode and their outputs no longer change with the A inputs. With CEABand OEABboth low, the 3-state B output buffers are active and reflect the data present at the output of the A latches. Control of data from B to A is similar, but uses the CEBA, LEB Aand OEBAinputs.


• A, C, and D grades

• Low input and output leakage ≤1µA (max.)

• CMOS power levels

• True TTL input and output compatibility:

(1) VOH= 3.3V (typ.)

(2) VOL= 0.3V (typ.)

• High Drive outputs (-15mA IOH, 64mA IOL)

• Meets or exceeds JEDEC standard 18 specifications

• Power off disable outputs permit “live insertion”

• Available in SOIC and QSOP packages

Block Diagram

IDT74FCT543ATEB pdf pinout

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IDT74FCT543ATEB Datasheet PDF Download