CD74FCT245ME4

Overview

The CD74FCT245ME4 is an octal bus transceiver from the FCT logic series, manufactured by Texas Instruments. It features a single circuit with eight bidirectional channels and non-inverting polarity. The device utilizes a 20-pin SOIC package for surface-mount installation. It 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 maximum low-level output current of 64 mA and a high-level output current of -32 mA. The propagation delay is specified at 7 ns, with an operating temperature range spanning from -40 °C to +85 °C.

Feature Summary

• Provides octal bidirectional data transmission capability for asynchronous two-way communication between data buses.
• Features three-state outputs to facilitate efficient bus management and signal isolation.
• Designed for high-speed performance with low propagation delay characteristics typical of the FCT series.

Applications

• Asynchronous two-way communication between data buses
• High-speed memory bus interfacing
• Buffering and driving of bidirectional data lines

Procurement Notes

Verify the specific suffix 'ME4' against official Texas Instruments documentation to confirm pinout compatibility and RoHS status. Ensure the selected package variant matches the target PCB footprint requirements. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.

Selection Notes

Select this component when an octal bus transceiver with three-state outputs is required for 5V logic systems. Consider the FCT series for its speed and drive strength advantages over standard 74LS equivalents. Verify that the 20-pin SOIC package dimensions fit the available board space and thermal constraints of the design.

Part Context

This device belongs to the Texas Instruments FCT (Fast CMOS) logic family, which combines the speed of ECL with the power efficiency of CMOS. The 74FCT245 variant specifically provides octal buffering for high-performance digital systems. The 'E4' suffix typically indicates environmental compliance, such as lead-free manufacturing, consistent with industry standards.

Replacement Considerations

Compatible substitutes include the CY74FCT245TSOC and CY74FCT245CTSOC from Texas Instruments, which share identical logical functions and pinouts. Other manufacturers may offer equivalent parts under the 74FCT245 designation, provided they meet the same electrical specifications and package requirements.