SN74F543 - Octal Registered Transceiver With 3-State Outputs

The SN74F543 octal transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate latch-enable ( or ) and output enable ( or ) inputs are provided for each register to permit independent control in either direction of data flow. The A outputs are characterized to sink 24 mA while the B outputs are characterized to sink 64 mA.

The A-to-B enable () input must be low in order to enter data from A or to output data from B. Having low and low makes the A-to-B latches transparent; a subsequent low-to-high transition of puts the A latches in the storage mode. With and 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 , , and inputs.

The SN74F543 is available in TI's shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area.

The SN74F543 is characterized for operation from 0°C to 70°C.

 

 

A-to-B data flow is shown; B-to-A flow control is the same except that it uses , , and .

Output level before the indicated steady-state input conditions were established.

Products containing the "SN74F543" keyword are: SN74F543DBLE , SN74F543DBR , SN74F543DBR , SN74F543DW , SN74F543DW , SN74F543DWG4 , SN74F543DWR , SN74F543DWR , SN74F543DWRG4 , SN74F543NSR , SN74F543NSRE4 , SN74F543NSRG4 , SN74F543NT

• 3-State True Outputs
• Back-to-Back Registers for Storage
• Package Options Include Plastic Small-Outline and Shrink Small-Outline Packages and Standard Plastic 300-mil DIPs