CY74FCT245ATPCG4

Overview

The CY74FCT245ATPCG4 is an octal bus transceiver from the Texas Instruments FCT logic series, housed in a 20-pin TSSOP 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 polarity with three-state outputs. Key electrical parameters include 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 under a 50 pF load at 5 V. The component functions across an industrial temperature range from -40 °C to +85 °C.

Feature Summary

• Provides bidirectional data transmission via eight independent channels with three-state outputs for effective bus management.
• Accepts TTL-compatible input signals while driving TTL-compatible loads, ensuring interface compatibility.
• Features non-inverting signal polarity to maintain logical state integrity during data transfer.

Applications

• High-speed data bus architectures requiring octal width
• Memory mapping and buffer applications in computing systems
• Industrial control systems operating within extended temperature ranges

Procurement Notes

Verify the specific suffix 'TPCG4' against official Texas Instruments documentation to confirm the exact package type (TSSOP) and lead-free compliance status. Ensure the ordering code matches the required tape-and-reel or cut-tape packaging format for your assembly process. Cross-reference the manufacturer part number with the distributor's catalog to confirm availability and current revision status before finalizing procurement.

Selection Notes

Select this component when an octal, non-inverting bus transceiver with three-state outputs is required for TTL-to-TTL interfacing. The FCT series offers faster switching speeds compared to standard CMOS alternatives. Consider the TSSOP-20 package dimensions and thermal characteristics for PCB layout. Verify that the 4.75 V to 5.25 V operating voltage aligns with the system power supply rails.

Part Context

This device belongs to the CY74FCT245T family of octal bus transceivers manufactured by Texas Instruments. The FCT series is designed for high-speed digital applications, bridging the performance gap between older TTL and modern CMOS technologies. The 'G4' suffix typically indicates lead-free and RoHS-compliant manufacturing, adhering to environmental standards while maintaining the core electrical specifications of the original FCT design.

Replacement Considerations

Direct pin-compatible replacements within the same family include CY74FCT245TSOC and CY74FCT245ATQCT. Verify package differences; TSOC uses SOIC-20, while ATQCT uses SSOP-20. Ensure the substitute maintains the same 64 mA/32 mA drive strength and 4.6 ns propagation delay characteristics for equivalent performance.