SN74CB3Q3125DBQR

Overview

The SN74CB3Q3125DBQR is a quadruple FET bus switch from the Texas Instruments SN74CB3Q family, housed in a 16-pin SSOP (DBQ) package. It operates on a single supply voltage ranging from 2.3V to 3.6V and supports data I/O signaling levels up to 5.5V. The device features four independent 1-bit switches with separate active-low output-enable inputs. It utilizes an internal charge pump to maintain low and flat ON-state resistance across the operating range. The component provides bidirectional data flow with minimal propagation delay and includes undershoot clamp diodes on control and data inputs.

Feature Summary

• High-bandwidth data path supporting frequencies up to 500MHz
• Rail-to-rail switching capability for both 2.5V and 3.3V power supplies
• Low input/output capacitance to minimize signal distortion and loading
• Supports partial-power-down mode operation via Ioff circuitry

Applications

• USB interface connections
• Differential signal interfaces
• Bus isolation circuits
• Optical modules and networking equipment

Procurement Notes

Verify the DBQ package designation corresponds to the 16-pin SSOP form factor required by the design. Confirm that the manufacturing status remains Active as listed in the latest TI Package Option Addendum. Ensure ESD handling protocols are followed during assembly due to the sensitivity of the CMOS structure.

Selection Notes

Select this component when a high-speed, low-distortion bus switch is needed for mixed-voltage environments. The 5V tolerant I/Os allow compatibility with legacy systems while operating at lower core voltages. Verify that the thermal characteristics of the SSOP package meet the system's heat dissipation requirements under maximum load conditions.

Part Context

This part belongs to the SN74CB3Q series, designed for broadband communications and data-intensive computing. It serves as a high-performance alternative to standard logic switches by offering superior signal integrity through its charge-pump technology and optimized ON-state resistance profile.

Replacement Considerations

SN74CBTLV3125DBQR