SN74AS641DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS641DW is an octal bus transceiver from the Texas Instruments AS logic family, housed in a 20-pin Small-Outline (SOIC) package. It supports bidirectional data transmission between two buses based on a direction-control input and features an output-enable pin for isolation. The device operates within a supply voltage range of 4.5 V to 5.5 V and an ambient temperature range of 0°C to 70°C. Electrical characteristics include a low-level output current capability of 64 mA, with propagation delays ranging from 1 ns to 22 ns depending on the signal path.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous two-way communication between data buses via true logic outputs
• Features a single direction-control input to manage data flow between A and B buses
• Includes an output-enable input to effectively isolate the buses when disabled

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Memory and memory mapping applications
• Clock drivers and buffered oscillators

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's Package Option Addendum to confirm the exact packaging type and material specifications. Ensure that the selected variant matches the required operating temperature range and moisture sensitivity level for your assembly process. Cross-reference the part marking codes to validate authenticity and traceability before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high-speed bidirectional data transfer is required using true logic polarity. The AS series offers faster switching speeds compared to standard LS or ALS families. Consider the 64 mA low-level output current capability if driving heavy capacitive loads. Verify that the system design accommodates the specified maximum supply voltage and operating temperature constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74AS641 family of octal bus transceivers. It is functionally related to the SN74ALS641A but utilizes the faster AS logic technology. The DW suffix specifically denotes the plastic small-outline package configuration. This family is designed for high-density applications requiring efficient bus management and isolation capabilities.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74AS641DW.A is confirmed as a direct replacement variant with identical electrical specifications and functionality.