SN74CB3Q3253PWR

Overview

The SN74CB3Q3253PWR is a dual 1-of-4 FET multiplexer/demultiplexer bus switch manufactured by Texas Instruments. It operates within a VCC range of 2.3V to 3.6V and features 5V tolerant I/Os. The device utilizes a charge pump to achieve low ON-state resistance (typical 4Ω) and supports rail-to-rail switching. It provides bidirectional data flow with near-zero propagation delay, high bandwidth up to 500MHz, and low input/output capacitance to minimize signal distortion.

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 operating range
• Support for partial-power-down mode operation via Ioff

Applications

• Video broadcasting IP-based multi-format transcoder
• Video communications system
• USB interface applications
• Differential signal interface bus isolation

Procurement Notes

Verify the package type matches the required footprint, as the PW suffix indicates TSSOP-16. Confirm that the voltage levels in the target circuit align with the specified 2.3V to 3.6V supply range and 5V tolerance limits. Ensure control inputs are driven by compatible TTL or CMOS logic levels. Check for any specific environmental or reliability certifications required for the deployment scenario.

Selection Notes

Select this component when designing systems requiring high-speed signal routing with minimal distortion. It is suitable for applications needing simultaneous multiplexing of four channels per switch section. Consider its low power consumption and fast switching frequency if energy efficiency and speed are critical constraints in the design architecture.

Part Context

This part belongs to the SN74CB3Q family of low-voltage high-bandwidth bus switches. It is designed for broadband communications, networking, and data-intensive computing systems. The device integrates two independent 1-of-4 multiplexers/demultiplexers, offering flexible configuration options for managing multiple data lines within a compact surface-mount package.

Replacement Considerations

SN74CB3T3253PW

FAQ

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

The SN74CB3Q3253 supports partial-power-down mode through its Ioff circuitry, which prevents damaging current backflow through the device when it is powered down.

What is the maximum switching frequency for the control inputs?

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