SN74CB3T3253DR

Overview

The SN74CB3T3253DR is a dual 1-of-4 FET multiplexer/demultiplexer switch manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 3.6 V and features a maximum on-resistance of 8 Ohms. The device supports high output currents up to 128 mA and includes powered-off protection to prevent leakage current when the power supply is off. It is housed in a 16-pin TVSOP package with dimensions of 5.0 mm width and 1.15 mm height, suitable for surface-mount applications across an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual independent channels configured as 1-of-4 multiplexers or demultiplexers
• Powered-off protection prevents leakage current during power-down states
• Low on-resistance ensures minimal signal attenuation across the data path
• High drive capability supports significant load currents without performance degradation

Applications

• Portable equipment requiring low-voltage signal routing
• Battery-powered systems utilizing single-supply operation
• Consumer electronics involving data bus switching
• Industrial control modules managing multiple signal inputs

Procurement Notes

Verify the specific suffix 'DR' corresponds to the tape-and-reel packaging format intended for automated assembly processes. Confirm that the TVSOP-16 footprint matches the target PCB design guidelines. Ensure the component meets RoHS compliance requirements for the specific manufacturing region. Cross-reference the datasheet revision history to validate electrical characteristics against the production batch date code.

Selection Notes

Select this component when dual-channel multiplexing is required within a compact surface-mount footprint. The 2.3 V minimum supply voltage makes it suitable for modern low-power logic families. Consider the 8 Ohm on-resistance limit when designing for high-fidelity analog signal paths. The TVSOP package offers thermal advantages over standard TSSOP variants while maintaining pin compatibility.

Part Context

This part belongs to the SN74CB3T3253 family of low-voltage bus switches. It serves as a digital signal routing solution within Texas Instruments' CB3T logic series. The device integrates FET-based switching technology optimized for high-speed data transmission. It complements other bus switches in the portfolio by providing dual-channel functionality in a standardized package.

Replacement Considerations

SN74CB3T3253DGVR: Identical functional specifications with a DGVR (TVSOP-16) package variant instead of DR.