SN74ALS651A-1DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS651A-1DW is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin SOIC package. It features non-inverting data paths with three-state outputs and TTL-compatible inputs. The device operates within a supply voltage range of 4.5 V to 5.5 V, supporting low-level output currents up to 48 mA and high-level output currents of -15 mA. Designed for surface-mount applications, it functions reliably across a commercial temperature range of 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides bidirectional octal data transmission between two buses using three-state outputs
• Features TTL-compatible input levels for direct interfacing with standard logic systems
• Delivers high drive capability suitable for driving heavy capacitive loads on system buses

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data acquisition systems requiring isolated bus segments
• Memory mapping circuits in microprocessor-based embedded designs
• Bidirectional gate interfaces connecting different logic families or subsystems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'DW' confirms the SOIC-20 surface mount package variant. Confirm that the 'A' designation aligns with current manufacturing revisions. Ensure compatibility with existing PCB footprints and thermal management requirements for the specified operating temperature range before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional octal transfer with three-state isolation is required. The ALS series offers improved speed and power consumption compared to standard LS logic. Verify that the 48 mA sink capability meets the load requirements of the destination bus lines and that the TTL input thresholds match the source driver outputs.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS651A family of octal bus transceivers. It serves as a critical interface element in digital systems, enabling controlled data flow between memory arrays, I/O ports, and processing units while maintaining signal integrity through its three-state output architecture.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible alternatives include the SN74ALS651A-1N (PDIP) and SN74ALS651A-1DR (SOIC). Verify that substitute packages match the board layout constraints and that electrical characteristics remain identical for seamless integration.