SN74ALS640BDWE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640BDWE4 is an octal bus transceiver from the Texas Instruments SN74ALS640B series. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides TTL-compatible input and output levels, with a propagation delay of 11 ns. It supports low-level output currents of 24 mA and high-level output currents of -15 mA. Designed for surface-mount applications, it is housed in a 20-pin SOIC package and functions within a temperature range of 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bidirectional data transfer capability with direction control
• Three-state outputs isolating the bus when disabled
• TTL-compatible input and output logic levels

Buffers, Drivers, Receivers, Transceivers Applications

• Memory mapping controllers
• Clock drivers
• Bus-oriented transmissions

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'E4' against the manufacturer's current datasheet to confirm compliance with RoHS directives and material composition requirements. Ensure the package designation matches the required SOIC-20 footprint for PCB layout compatibility. Confirm that the operating temperature range meets the environmental specifications of the target application system.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for systems requiring high-speed data transfer with TTL interface compatibility. The ALS logic family offers improved speed over standard LS types while maintaining similar power consumption characteristics. Consider the 11 ns propagation delay and drive strength when designing for signal integrity on high-capacitance buses.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS640B family of octal bus transceivers. It serves as a key interface component for managing data flow between microprocessors and peripheral devices. The device is part of the broader 74-series logic ecosystem, providing standardized functionality for digital circuit design across various industrial and commercial electronics platforms.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for SN74ALS640BDW or SN74ALS640BDWR as potential functional equivalents within the same series. Verify pinout and electrical specifications before substitution.