SN74LVC646APWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC646APWR is an octal bus transceiver and register with 3-state outputs manufactured by Texas Instruments. It operates from a supply voltage range of 1.65 V to 3.6 V. The device features inputs that accept voltages up to 5.5 V, supporting mixed 5-V and 3-V systems. It includes Ioff support for partial-power-down mode, preventing excessive current draw when the device is powered down but the system is active. The component is housed in a 24-pin TSSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver architecture with non-inverting functionality
• Supports partial-power-down mode via Ioff circuitry
• Inputs tolerant to 5.5 V signals while operating at lower voltages
• Provides 3-state outputs for effective bus line management

Buffers, Drivers, Receivers, Transceivers Applications

• Mixed 5-V and 3-V memory mapping
• Clock drivers
• Bus-oriented communications

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'PWR' indicates the TSSOP-24 package variant. Confirm the revision level matches your design requirements, as datasheet revisions may update electrical characteristics or mechanical drawings. Ensure the operating temperature range of -40°C to 85°C aligns with your environmental specifications. Cross-reference the manufacturer's official ordering information to confirm availability and lead times directly from Texas Instruments or authorized distributors.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal bidirectional data path is required between buses operating at different voltage levels. The 5.5 V input tolerance allows direct interfacing with legacy 5-V logic without additional level shifting components. The integrated register function provides storage capability within the transceiver path. Consider the 3-state output capability for efficient bus sharing in complex digital systems requiring multiple masters or slaves.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the LVC (Low Voltage CMOS) family, designed for low-voltage applications ranging from 1.65 V to 3.6 V. The SN74LVC646A variant specifically combines transceiver and register functions in an octal configuration. It is part of Texas Instruments' broader portfolio of logic devices aimed at reducing power consumption while maintaining high-speed performance in portable and battery-operated electronics.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for SN74LVC646APW (SOIC-24) if pin-compatible packaging changes are acceptable. Verify functional equivalence with other octal bus transceivers in the LVC series. Ensure any substitute maintains the 5.5 V input tolerance and 3-state output characteristics.