SN74ALS640BDWRE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640BDWRE4 is an octal bus transceiver from the Texas Instruments 74ALS series. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a propagation delay of 11 ns, with low-level output current capability of 24 mA and high-level output current of -15 mA. It utilizes TTL input and output levels and functions as an inverting transceiver. The component is housed in a 20-pin SOIC package and supports surface-mount installation.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight bidirectional data channels for efficient bus interfacing
• Three-state outputs enable direct connection to system buses without additional drivers
• TTL-compatible input and output levels ensure compatibility with standard logic families

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data acquisition systems requiring fast signal transfer
• Memory mapping applications involving address and data bus management
• Control circuits utilizing parallel I/O expansion via bus architectures

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix E4 indicates lead-free compliance and RoHS status against the manufacturer's official documentation. Confirm the package type matches the required PCB footprint and that the operating temperature range aligns with the intended environmental conditions. Ensure the ordering part number corresponds exactly to the desired revision and packaging format.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring high-speed data transfer with TTL interface compatibility. The ALS technology offers improved speed over standard LS series while maintaining similar power consumption profiles. Consider the three-state output capability for multiplexed bus designs where multiple devices share common data lines.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments 74ALS (Advanced Low-power Schottky) family, designed for high-speed digital applications. The SN74ALS640B variant specifically addresses the need for octal bus transceivers with enhanced performance characteristics compared to earlier generations, supporting modern embedded control requirements.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The SN74ALS640BDWR serves as a functional equivalent within the same product line. Verify pinout compatibility and electrical specifications before substitution. Cross-reference with other 74ALS octal transceivers if alternative packaging or sourcing options are required.