SN74ALS640BDWG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640BDWG4 is an octal bus transceiver from the Texas Instruments 74ALS series, housed in a 20-pin SOIC package. 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 supports TTL input and output levels and functions within an operating temperature range of 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

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

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data acquisition systems requiring reliable signal buffering.
• Memory mapping applications involving address and data bus management.
• General-purpose digital communication interfaces utilizing parallel data transfer.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free construction as per manufacturer standards. Confirm the SOIC-20 package dimensions match the design footprint requirements. Ensure the operating temperature range aligns with the environmental conditions of the target application. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal transceiver with ALS speed characteristics is required. The 11 ns propagation delay suits moderate-to-high speed digital systems. Verify that the 24 mA sink current meets the load requirements of the connected bus lines. Consider the SOIC package for surface-mount assembly processes. Compare against LS or AS variants if power consumption or speed thresholds differ significantly.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS640B family of octal bus transceivers. It serves as a buffer and directional controller for data flow between two buses. The device simplifies circuit design by integrating direction control and output enable functions into a single package. It is widely used in microprocessor-based systems for memory and I/O expansion.

Buffers, Drivers, Receivers, Transceivers FAQ

Is the SN74ALS640BDWG4 compatible with TTL logic levels?

Yes, the device accepts TTL input levels and provides TTL-compatible output levels, ensuring compatibility with standard digital logic families.

What is the maximum supply voltage for this transceiver?

The maximum recommended supply voltage (VCC) for the SN74ALS640BDWG4 is 5.5 V.