SN74CB3Q3125PWR

Overview

The SN74CB3Q3125PWR is a quadruple FET bus switch from the SN74CB3Q family, manufactured by Texas Instruments. It operates within a supply voltage range of 2.3V to 3.6V and supports data I/O signaling levels from 0V to 5V. The device features four independent 1-bit switches with separate output-enable inputs, housed in a 14-pin TSSOP package. Key electrical parameters include a typical ON-state resistance (ron) of 3Ω to 4Ω, maximum propagation delay of 0.2ns at 3.3V, and typical off-state capacitance of 4pF. It supports partial-power-down mode via Ioff circuitry and provides high ESD protection ratings.

Feature Summary

• High-bandwidth data path supporting frequencies up to 500MHz
• Rail-to-rail switching capability for 0V to 5V signals with 3.3V VCC
• Low and flat ON-state resistance characteristics over the operating temperature range
• Ioff circuitry enables safe partial-power-down mode operation

Applications

• USB interface connections
• Differential signal interfaces
• Bus isolation circuits
• Low-distortion signal gating
• Optical networking equipment

Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the component status is listed as Active in the manufacturer's current production data, as previous revisions or alternative suffixes may indicate different availability or lifecycle stages. Ensure compatibility with standard surface-mount reflow profiles specified for the TSSOP-14 package.

Selection Notes

Select this component when designing systems requiring bidirectional data flow with minimal signal distortion and low insertion loss. It is suitable for applications needing 5V tolerance on I/O ports while powered by lower voltage supplies like 2.5V or 3.3V. Consider the 14-pin TSSOP footprint constraints and ensure adequate thermal management if multiple switches are utilized simultaneously under heavy load conditions.

Part Context

This part belongs to the SN74CB3Q series of high-speed bus switches designed for broadband communications and data-intensive computing. The CB3Q family utilizes a charge pump to elevate gate voltage, ensuring consistent ON-state resistance. This specific model represents the quadruple switch variant, offering four independent channels in a compact surface-mount package compared to single or dual-channel alternatives.

Replacement Considerations

SN74CB3Q3125PW is a parameter-equivalent alternative available in tube packaging.