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Partname:CY74FCT2543ATSOCT
Description: OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS AND SERIES DAMPING RESISTORS
Manufacturer:Texas Instruments
Package:DW
Pins:24
Oper. temp.:-40 to 85
Datasheet:PDF (55.4K).
Click here to download *)

The FCT2543T Octal Latched Tranceiver contains two sets of eight D-type latches. Separate Latch Enable (LEAB, LEBA) and Output Enable (OEAB, OEBA) permits each latch set to have independent control of inputting and outputting in either direction of data flow. For data flow from A to B, for example, the A-to-B Enable (CEAB) input must be LOW to enter data from A or to take data from B, as indicated in the truth table. With CEAB LOW, 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 LEAB signal puts the A latches in the storage mode and their output no longer change with the A inputs. With CEAB and OEAB both LOW, the three-state B output buffers are active and reflect data present at the output of the A latches. Control of data from B to A is similar, but uses CEAB, LEAB, and OEAB inputs. On-chip termination resistors have been added to the outputs to reduce system noise caused by reflections. The FCT2543T can be used to replace the FCT543T to reduce noise in an existing design.

Click here to download CY74FCT2543ATSOCT Datasheet
Click here to download CY74FCT2543ATSOCT Datasheet
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