SN74ALS620ANS

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS620ANS is an octal bus transceiver from the Texas Instruments ALS logic family, designed for asynchronous two-way communication between data buses. It features a 20-pin Small-Outline (SOIC) package and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides three-state inverting outputs with dual output-enable inputs (OEAB and OEBA) that control data flow direction or isolate the buses. It supports local bus-latch capability and functions across an operating temperature range of 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous bidirectional data transmission between two independent 8-bit buses using dedicated enable controls.
• Features three-state inverting outputs that allow effective bus isolation when disabled.
• Supports local bus-latch functionality by simultaneously enabling both output-enable inputs.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus-oriented memory and signal buffering
• Local bus-latch applications

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'ANS' against current manufacturer documentation to confirm the package type and material specifications. Ensure the procurement channel sources production-grade components rather than preproduction prototypes. Confirm RoHS compliance status and lead finish details match project requirements before finalizing orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring octal bidirectional data transfer with inverting logic characteristics. The ALS series offers faster switching speeds compared to standard LS logic while maintaining lower power consumption. Verify that the required output drive strength and bus capacitance loads fall within the specified electrical limits for reliable operation.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74ALS620A family of octal bus transceivers. It shares functional similarities with the SN74ALS621A and SN74ALS623A but differs in output configuration. While the SN74ALS621A utilizes open-collector true outputs and the SN74ALS623A uses three-state true outputs, the SN74ALS620ANS specifically implements three-state inverting outputs for complementary data handling.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS621AN

Buffers, Drivers, Receivers, Transceivers FAQ

How does the SN74ALS620ANS achieve bus isolation?

The device isolates the buses when both output-enable inputs (OEAB and OEBA) are set to a high logic level, effectively disabling the outputs.

What is the function of the dual-enable configuration?

Simultaneously enabling both OEAB and OEBA allows the transceiver to store data, keeping the bus lines at their last states if no other data sources are active.