SN74CB3Q3253PWRE4

Overview

The SN74CB3Q3253PWRE4 is a dual 1-of-4 FET multiplexer/demultiplexer from Texas Instruments, housed in a 16-pin TSSOP package. It operates on a single supply voltage ranging from 2.3V to 3.6V. The device features high-bandwidth data paths up to 500MHz and 5V tolerant I/Os that function with the device powered up or down. Key electrical parameters include a typical ON-state resistance of 4Ω, a maximum switching frequency of 20MHz for control inputs, and low input/output capacitance to minimize signal distortion.

Feature Summary

• High-bandwidth data path supporting frequencies up to 500MHz
• 5V tolerant I/Os compatible with TTL and CMOS logic levels
• Low and flat ON-state resistance characteristics over the operating range
• Rail-to-rail switching capability on data ports

Applications

• Video broadcasting IP-based multi-format transcoders
• Video communications systems
• USB interface connections
• Differential signal interface bus isolation

Procurement Notes

Verify the E4 suffix indicates lead-free composition and RoHS compliance. Confirm the PWRE4 designation corresponds to the TSSOP-16 package type and reel packaging format. Ensure the component meets the specified -40°C to +85°C operating temperature range for your application environment.

Selection Notes

Select this component when bidirectional data flow with near-zero propagation delay is required. It is suitable for applications needing rail-to-rail switching between 0V and 5V signals while powered by 2.5V or 3.3V supplies. Consider its low power consumption and undershoot clamp diodes for sensitive digital and analog signal gating tasks.

Part Context

This part belongs to the SN74CB3Q family of high-speed FET bus switches. It utilizes a charge pump to elevate gate voltage, ensuring low ON-state resistance. The device supports partial-power-down mode via Ioff circuitry to prevent backflow current during power cycles.

Replacement Considerations

SN74CB3Q3253PWR is the non-E4 equivalent variant.

FAQ

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

The device includes Ioff circuitry that prevents damaging current backflow through the I/O ports when VCC is at 0V, allowing safe operation in partial-power-down modes.

What is the maximum switching frequency for the control inputs?

The maximum switching frequency for the OE or S control inputs is 20MHz.