CD54HCT640F3A

Buffers, Drivers, Receivers, Transceivers Overview

The CD54HCT640F3A is a high-speed CMOS logic octal inverting bus transceiver with three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -55°C to 125°C. The device features buffered inputs, balanced propagation delay, and transition times. It provides significant power reduction compared to LSTTL logic ICs while maintaining speeds comparable to low-power Schottky TTL circuits.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal three-state bus transceiver architecture
• Inverting buffer functionality
• Direct LSTTL input logic compatibility
• High drive current outputs for large bus capacitances

Buffers, Drivers, Receivers, Transceivers Applications

• Multiple-data-bus architectures
• Two-way asynchronous communication between data buses
• High-speed operation driving large bus capacitances

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix F3A corresponds to the CDIP-20 package configuration. Confirm military-grade QML certification requirements if applicable to the system design. Ensure proper handling precautions are observed due to electrostatic discharge sensitivity inherent to CMOS technology.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer with inversion is required across multiple lines. The HCT series ensures direct compatibility with LSTTL logic levels at standard 5V operation. Consider the wide temperature range for harsh environment deployments where standard commercial grade devices may not suffice.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments CDx4HCT640 family of high-speed CMOS logic devices. It serves as the military-grade variant (CD54) of the commercial CD74HCT640. The family includes non-inverting counterparts and HC series variants with wider voltage ranges.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

CD54HC640F3A

Buffers, Drivers, Receivers, Transceivers FAQ

How is the direction of data flow controlled?

The direction of data flow (A to B or B to A) is controlled by the DIR input pin.

What controls the output enable state?

Outputs are enabled by a low signal on the Output Enable (OE) input; a high OE puts the device in the high impedance mode.