IDT74FCT543DTQG

Overview

The IDT74FCT543DTQG is an octal bus transceiver manufactured by Renesas Electronics Corporation, belonging to the 74FCT logic series. It features a single non-inverting element with eight bits per element and provides three-state outputs. The device operates within a supply voltage range of 4.75V to 5.25V and supports output currents of 15mA high and 64mA low. It is housed in a 24-QSOP surface-mount package and functions across a temperature range of -40°C to 85°C.

Feature Summary

• Provides bidirectional data transmission between buses using a single non-inverting transceiver element.
• Features three-state outputs to facilitate bus line driving and isolation.
• Compatible with TTL input levels while maintaining CMOS power consumption characteristics.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitter/receiver circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability issues. Confirm that the specific suffix matches the required package and temperature grade. Check for end-of-life status or obsolescence notices from Renesas before finalizing procurement plans.

Selection Notes

Select this component when an octal bidirectional transceiver with three-state outputs is required for system bus architectures. Ensure the design accommodates the 4.75V to 5.25V supply voltage range. Verify that the 24-QSOP package dimensions fit the printed circuit board layout constraints.

Part Context

This part belongs to the 74FCT family of Fast CMOS logic devices, which bridge the performance gap between standard TTL and CMOS technologies. The 74FCT543 variant specifically serves as an octal buffer/transceiver, offering high drive capability and low power dissipation suitable for complex digital systems requiring reliable data transfer.

Replacement Considerations

Public confirmed substitute part numbers include CY74FCT2543ATQCT and CY74FCT2543CTQCT from Texas Instruments. These alternatives offer similar functional characteristics but require verification of pinout compatibility and electrical specifications against the original design requirements.