SN74CB3Q3125PWRE4

Overview

The SN74CB3Q3125PWRE4 is a quadruple FET bus switch from the CB3Q family, designed for high-bandwidth applications up to 500MHz. It operates on a single supply voltage ranging from 2.3V to 3.6V and features 5V tolerant I/Os that remain functional during power-up or power-down states. The device utilizes a charge pump to maintain low and flat ON-state resistance (ron) across the operating range, enabling rail-to-rail switching with minimal propagation delay. It supports bidirectional data flow and includes undershoot clamp diodes on data and control inputs.

Feature Summary

• High-bandwidth data path supporting frequencies up to 500MHz
• Rail-to-rail switching capability on data I/O ports
• Low and flat ON-state resistance characteristics over the full operating temperature range
• Partial-power-down mode support via Ioff circuitry

Applications

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

Procurement Notes

Verify the specific package type and suffix against the manufacturer's current orderable addendum, as availability and lead times are subject to change. Confirm RoHS compliance status and moisture sensitivity level ratings prior to integration into the manufacturing process. Ensure design validation accounts for the recommended operating conditions and absolute maximum ratings defined in the official datasheet.

Selection Notes

Select this component when a high-bandwidth solution is required for 2.5V or 3.3V systems interfacing with 5V logic levels. The device is suitable for applications demanding low capacitive loading to minimize signal distortion. Consider the TSSOP-14 package for surface-mount assembly requirements. Verify that the control input voltage levels align with the specified VIH and VIL thresholds for the chosen supply voltage.

Part Context

This part belongs to the Texas Instruments SN74CB3Q3125 series of quadruple FET bus switches. The 'PW' suffix indicates a 14-pin Thin Shrink Small Outline Package (TSSOP). The 'E4' suffix denotes environmental compliance and lead finish specifications consistent with Texas Instruments standards. The device is engineered for broadband communications and networking environments requiring reliable signal routing.

Replacement Considerations

SN74CB3Q3125PWR

FAQ

How does the device handle partial-power-down scenarios?

The SN74CB3Q3125PWRE4 incorporates Ioff circuitry that prevents damaging current backflow through the device when it is powered down, ensuring isolation during power-off states.

What is the maximum switching frequency supported by the control inputs?

The device supports a maximum switching frequency (fOE) of 20MHz for the output enable inputs.