SN74ALS643A-1N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS643A-1N is an octal bus transceiver manufactured by Texas Instruments, belonging to the ALS logic series. It features eight circuits with three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports TTL input and output levels, providing a low-level output current of 24 mA and a high-level output current of -15 mA. It exhibits a propagation delay of 10 ns and functions reliably between 0°C and +70°C. The component is housed in a PDIP-20 package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver configuration with three-state outputs
• Compatible with TTL input and output logic levels
• High drive capability with specified low and high-level output currents

Buffers, Drivers, Receivers, Transceivers Applications

• Memory mapping control
• Clock driving
• Bus-oriented communications

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify RoHS compliance status as documentation indicates non-compliance. Confirm moisture sensitivity level (MSL 3) for storage and handling requirements. Ensure the specific suffix matches design needs. Check for lead-free availability alternatives if required by project specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring high-speed data transfer with strong drive capabilities. The ALS series offers improved speed-power product compared to standard TTL. Verify that the operating temperature range meets environmental constraints. Consider the PDIP-20 package for through-hole mounting requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS64x family of octal bus transceivers. It shares functional similarities with the SN74ALS645A but may differ in specific electrical characteristics or pinout configurations. It is designed for bidirectional data transmission on microprocessor systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The SN74ALS645A-1N is a related component in the same family. Verify pin compatibility and specific electrical parameter differences before substitution. Consult official datasheets for detailed comparison.