74CB3Q3253BQX

Overview

The Nexperia 74CB3Q3253BQX is a dual high-bandwidth single-pole, quad-throw FET bus switch. It features an internal charge pump that increases the gate voltage of the NMOS pass transistor, enabling the switching of 5 V signals when VCC = 3.3 V. The device operates with a supply voltage range from 2.3 V to 3.6 V and supports overvoltage switching on ports up to 5.5 V. It provides low ON resistance and OFF-state capacitance to minimize loading and signal distortion.

Feature Summary

• Internal charge pump enables 5 V signal switching at 3.3 V supply
• High bandwidth for fast switching frequency applications
• IOFF circuitry supports partial power-down mode operation
• Control inputs compatible with TTL or 5 V/3.3 V CMOS outputs

Applications

• Communication infrastructure
• Bus isolation
• Memory interleaving
• Sensor multiplexing

Procurement Notes

Verify the specific ordering suffix 'BQ' corresponds to the DHVQFN16 package (SOT763-1) as defined in the official datasheet. Confirm the temperature range matches the -40 °C to +85 °C specification. Ensure the component meets the required ESD protection levels and latch-up performance standards before finalizing procurement.

Selection Notes

Select this component when interfacing between different voltage nodes, specifically requiring 5 V signal handling with a lower control supply. The DHVQFN16 package offers a compact solution for space-constrained designs. Consider the maximum operating frequency and ON resistance characteristics relative to the load requirements.

Part Context

This part belongs to the Nexperia CB3Q logic family, designed for switching 5 V signals in 3.3 V isolation and multiplexing applications. It utilizes Advanced BiCMOS Technology to provide high reliability and low power consumption. The series includes various packages to accommodate different PCB layout needs.

Replacement Considerations

The 74CB3Q3253PW serves as a functional equivalent in the TSSOP16 package. Verify pin compatibility and thermal dissipation requirements when substituting between the DHVQFN16 and TSSOP16 form factors.