SN74AS643N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS643N is an 8-bit bus transceiver manufactured by Texas Instruments, featuring non-inverting 3-state outputs. It operates on a single 5V supply and utilizes the AS-TTL logic series for high-speed performance with a propagation delay of 6.5ns. The component is housed in a 20-pin PDIP plastic package, designed for through-hole mounting. It supports bidirectional data transfer between two buses, controlled by direction and output enable inputs.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides 8-bit bidirectional data transmission capability
• Features non-inverting 3-state outputs for bus isolation
• Utilizes AS-TTL technology for high-speed operation

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data bus systems
• Memory interface circuits
• Digital signal routing applications

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify RoHS compliance status as sources indicate conflicting information regarding lead-free certification. Confirm package authenticity and manufacturer origin. Ensure ordering suffix matches the specific PDIP-20 variant required for your design constraints.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an 8-bit wide bus interface with 3-state control is required. The AS-series offers faster switching speeds compared to standard LS-TTL equivalents. Ensure the PCB layout supports the PDIP-20 footprint and that voltage levels align with the 5V operating requirement.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74AS family of high-speed TTL logic components. It serves as a buffer and driver within Texas Instruments' broader logic IC portfolio, specifically addressing needs for multi-bit data transfer in digital systems requiring moderate speed and robust output drive capabilities.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for SN74AS643 alternatives from other manufacturers offering identical pinouts and electrical characteristics. Verify compatibility with existing board designs before substitution.