DM74ALS645AWMX

Overview

The DM74ALS645AWMX is an octal bus transceiver manufactured by onsemi, utilizing the Advanced Oxide-isolated Ion-implanted Schottky TTL process. It operates within a supply voltage range of 4.5V to 5.5V and supports bidirectional data transmission between two buses based on the direction control input. The device features three-state outputs and is housed in a 20-Lead Small Outline Integrated Circuit (SOIC) package. Propagation delay ranges from 10ns to 31ns at 50 pF load.

Feature Summary

• Advanced Oxide-isolated Ion-implanted Schottky TTL process
• Switching performance guaranteed over full temperature and VCC supply range
• PNP input design reduces input loading

Applications

• Asynchronous two-way communication between data busses
• Memory systems
• Microprocessor systems

Procurement Notes

Verify the manufacturer designation as onsemi for this specific part number while cross-referencing datasheet documentation originating from Fairchild Semiconductor. Confirm that the SOIC-20 package matches the M20B code. Ensure compatibility with the specified operating temperature range and electrical characteristics before procurement.

Selection Notes

Select this component for applications requiring asynchronous bidirectional data transfer with defined propagation delays. Consider the PNP input design for reduced loading requirements. Verify that the 20-pin SOIC footprint fits the target PCB layout and that the logic levels align with the system's TTL interface standards.

Part Context

This device belongs to the 74ALS series of logic integrated circuits, specifically designed for high-speed digital applications. It functions as an octal bus transceiver, providing eight channels of data transfer capability. The technology combines low power consumption with fast switching speeds suitable for complex digital systems.

Replacement Considerations

SN74ALS645A-1N