74CB3Q3253DBQRG4

Overview

The SN74CB3Q3253DBQRG4 is a dual 1-of-4 FET multiplexer/demultiplexer from Texas Instruments. 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 supports bidirectional data flow with near-zero propagation delay. It includes 5V tolerant I/Os that function correctly whether the device is powered up or down. The package type is SSOP-16.

Feature Summary

• High-bandwidth data path supporting frequencies up to 500MHz
• 5V tolerant I/Os compatible with various logic levels during power states
• Low and flat ON-state resistance characteristics over the operating range
• Rail-to-rail switching capability for data input/output ports

Applications

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

Procurement Notes

Verify the specific ordering suffix 'RG4' against the manufacturer's current documentation to confirm RoHS compliance and lead-free status. Confirm the DBQR package designation matches the required SSOP-16 footprint for your PCB layout. Ensure control inputs are tied to VCC or GND to maintain proper operation.

Selection Notes

Select this component when designing systems requiring high-speed signal routing with low distortion. It is suitable for applications needing rail-to-rail switching between different voltage domains, such as 2.5V and 3.3V systems. Consider its bidirectional data flow capabilities for complex bus architectures.

Part Context

This part belongs to the SN74CB3Q3253 family of high-bandwidth FET bus switches. These devices utilize a charge pump to elevate gate voltage, ensuring consistent ON-state resistance. The family is designed for broadband communications and data-intensive computing systems requiring minimal signal degradation.

Replacement Considerations

SN74CB3Q3253DBQ

FAQ

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

The device supports partial-power-down mode via 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 20MHz.