SN74ALS645A-1NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS645A-1NSR is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin Small Outline Package (SOP). It provides bidirectional data communication between two buses with three-state outputs. The device features a direction control input to select transmission flow and an output enable input for isolation. Designed for asynchronous applications, it operates within a supply voltage range of 4.5 V to 5.5 V and supports a recommended maximum low-level output current of 48 mA when VCC is between 4.75 V and 5.25 V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional octal bus transceiver architecture supporting asynchronous two-way communication
• Three-state outputs allowing effective bus isolation via the output-enable input
• Direction control input determines data flow between A and B buses
• -1 version designation indicates increased low-level output current capability

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• High-density digital circuit designs requiring bidirectional data transfer
• Systems utilizing TTL-compatible logic levels

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the specific -1 suffix corresponds to the required 48 mA low-level output current specification. Confirm the SOP package type matches the design footprint. Ensure operating conditions remain within the specified 4.5 V to 5.5 V supply voltage range for proper functionality.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional octal data transfer with high drive capability is required. The -1 variant is necessary if the application demands the increased 48 mA low-level output current under specific voltage conditions. Consider the SOP package dimensions for board layout constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS645A series of octal bus transceivers. It shares functional similarities with standard versions but differs in output drive characteristics due to the -1 suffix. It is distinct from the SN54ALS645A, which lacks the -1 version option and supports military temperature ranges.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS645ANSR is a compatible alternative within the same series without the -1 suffix modification.