CY74FCT245ATQCT

Overview

The CY74FCT245ATQCT 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 high-level output current of -32 mA. Propagation delay is specified at 4.6 ns at 5 V under a 50 pF load condition. It functions reliably across an industrial temperature range from -40 °C to +85 °C.

Feature Summary

• Octal bidirectional data transfer capability with a single direction control pin
• Three-state outputs for effective bus line isolation and system management
• TTL-compatible input thresholds ensuring direct interface with standard logic families

Applications

• High-speed data bus architectures requiring bidirectional signal routing
• Memory module interfacing and data buffering in embedded systems
• I/O port expansion circuits in industrial control environments

Procurement Notes

Verify the specific suffix 'ATQCT' against the manufacturer's official documentation to confirm the exact tape-and-reel packaging configuration and moisture sensitivity level. Ensure the order matches the required SSOP-20 footprint and lead finish specifications defined in the latest datasheet revision to prevent assembly compatibility issues.

Selection Notes

Select this component when designing systems that require robust bidirectional data handling with strong drive capabilities. The FCT technology offers superior speed compared to standard CMOS alternatives while maintaining low power consumption. Confirm that the application environment stays within the specified 4.75 V to 5.25 V supply range and thermal limits for optimal performance.

Part Context

This part belongs to the CY74FCT245T family of octal bus transceivers manufactured by Texas Instruments. It serves as a critical interface element in digital logic designs, facilitating efficient data movement between microprocessors, memory devices, and peripheral controllers. The FCT series is engineered for high-speed applications demanding reliable signal integrity and fast switching times.

Replacement Considerations

CY74FCT245ATSOCT (SOIC-20 package variant)

FAQ

What is the polarity of the data transmission?

The device provides non-inverting data transmission, meaning the output signal maintains the same logical state as the input signal.

How does the device manage bus contention?

It utilizes three-state outputs controlled by an OE (Output Enable) pin, allowing the bus lines to be placed in a high-impedance state to prevent electrical conflicts.