CY74FCT245TQCT

Overview

The CY74FCT245TQCT is an octal bus transceiver from the Texas Instruments FCT logic series, housed in a 20-pin SSOP surface-mount package. It operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. The device features non-inverting data flow with three-state outputs, providing a maximum low-level output current of 64 mA and a maximum high-level output current of -32 mA. Propagation delay is specified at 4.6 ns under a 5 V supply with 50 pF load capacitance. It functions reliably across an industrial temperature range of -40 °C to +85 °C.

Feature Summary

• Octal bidirectional data transfer capability with a single control pin for direction selection
• Three-state outputs isolate the bus when disabled to prevent signal contention
• High drive strength ensures robust signal integrity on system buses
• Compatible with standard TTL logic families for seamless interface integration

Applications

• Memory bus architectures requiring high-speed data latching and transfer
• Clock drivers and buffered clock distribution networks
• Bidirectional gate interfaces between different logic domains
• Bus-oriented memory and I/O systems

Procurement Notes

Verify the specific suffix 'TQCT' against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and exact pinout compatibility. Ensure the order matches the required moisture sensitivity level and RoHS compliance status as defined in the latest product documentation. Cross-reference the part number with authorized distributors to validate authenticity and traceability before procurement.

Selection Notes

Select this component when an octal, non-inverting bus transceiver with strong drive capabilities is required for 5V logic systems. The SSOP package is suitable for space-constrained surface-mount designs. Compare propagation delay specifications against system timing requirements to ensure adequate performance margins. Verify that the input voltage thresholds align with the driving logic family to guarantee reliable switching characteristics.

Part Context

This device belongs to the FCT (Fast CMOS) logic family, designed to combine the speed of bipolar circuits with the low power consumption of CMOS technology. The CY74FCT245 variant specifically provides eight bits of bidirectional data transfer. The TQCT suffix indicates a specific reel quantity and packaging format within the broader 74FCT245 product line, distinguishing it from tube-packaged or alternative package variants.

Replacement Considerations

Direct replacements include CY74FCT245ATQCT and CY74FCT245TSOC, which share identical electrical characteristics and pinouts but may differ in packaging type such as SOIC versus SSOP. Verify that any substitute maintains the same 64mA/32mA drive current ratings and 4.6ns propagation delay to ensure circuit compatibility.