SN74ALS645ADWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS645ADWR is an octal bus transceiver from the Texas Instruments SN74ALS645A series, housed in a 20-pin Small Outline (DW) package. It supports asynchronous bidirectional communication between data buses with true logic and 3-state outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and functions over an operating temperature range of 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional data transmission between A and B buses controlled by DIR input
• Output isolation capability via OE input for effective bus disconnection
• High-density 20-pin plastic small-outline packaging

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• General-purpose bus interfacing in industrial control systems
• Memory interface circuits requiring high drive current

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the specific part number matches the required ALS logic family and SOIC-20 package configuration. Confirm RoHS compliance status and lead finish details against the latest TI Package Option Addendum. Ensure the ordering suffix corresponds to the desired tape and reel quantity if applicable.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high-speed bidirectional data transfer is required with strong output drive capabilities. The ALS technology provides faster switching speeds compared to standard LS logic. Consider the -1 version variant if increased low-level output current up to 48 mA is necessary for specific load conditions.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74ALS645A octal bus transceiver family, designed for high-performance digital applications. It complements other ALS series components like the SN74ALS373A latch and SN74ALS577A flip-flop, offering compatible logic levels and pinout structures for system integration.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS645DWR: Compatible alternative with lower speed but similar functionality. SN74ALS645ADW: Same electrical specifications in a non-reel SOIC package.