CY74FCT245CTSOCTE4

Overview

The CY74FCT245CTSOCTE4 is an octal bus transceiver from the FCT logic series, manufactured by Texas Instruments. It features eight bidirectional channels with three-state outputs in a 20-pin SOIC package. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. Key electrical parameters include a propagation delay of 7 ns, a low-level output current of 64 mA, and a high-level output current of -32 mA. It functions as a non-inverting transceiver suitable for surface-mount applications across a temperature range of -40°C to +85°C.

Feature Summary

• Octal bidirectional data transfer capability with common control direction selection
• Three-state outputs designed to minimize bus contention during transitions
• TTL-compatible input and output voltage thresholds for system integration

Applications

• High-speed data bus architectures requiring parallel data movement
• Memory buffer interfaces connecting processors to storage modules
• I/O port expansion circuits in embedded computing systems

Procurement Notes

Verify the specific suffix E4 indicates lead-free compliance status against the manufacturer's latest documentation. Confirm the SOIC-20 package dimensions match the design footprint requirements. Ensure the operating temperature range aligns with the environmental conditions of the target application. Cross-reference the datasheet revision date to confirm current electrical specifications before finalizing procurement.

Selection Notes

Select this component when an octal bus transceiver with FCT speed characteristics is required for 5V logic systems. The SOIC-20 package offers a compact solution for surface-mount designs compared to through-hole alternatives. Consider the 7 ns propagation delay and drive strength when evaluating signal integrity for long traces or heavy capacitive loads on the bus lines.

Part Context

This part belongs to the Texas Instruments CY74FCT245T family of standard bus transceivers. The base model CY74FCT245 provides the core logical functionality, while the CT designation specifies the commercial temperature grade and SOIC package variant. The E4 suffix typically denotes environmental compliance attributes such as lead-free manufacturing processes defined by the manufacturer.

Replacement Considerations

Direct pin-to-pin replacements may include other manufacturers' 74FCT245 variants in SOIC-20 packages. Verify that substitute parts maintain identical voltage ranges and drive currents. Check for any differences in propagation delay specifications that might affect timing margins in high-speed bus applications.