74CB3T1G125DBVRE4

Overview

The SN74CB3T1G125DBVRE4 is a single FET low-voltage bus switch with a 5-V tolerant level shifter, manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 3.6 V and supports an input/output continuous current of up to 128 mA. The device features powered-off protection and signal path translation capabilities. Key electrical parameters include a maximum supply current of 20 uA, typical on-state capacitance (CON) of 12 pF, and typical off-state capacitance (COFF) of 5 pF. It functions reliably across an operating temperature range of -40°C to 85°C.

Feature Summary

• Provides signal path translation between different voltage domains while maintaining 5-V tolerance.
• Includes powered-off protection to prevent high leakage currents when the device is unpowered.
• Offers low on-state capacitance for high-speed signal switching applications.

Applications

• Level shifting in portable consumer electronics
• Signal routing in battery-powered devices
• Bus switching in low-voltage logic systems

Procurement Notes

Verify the specific ordering suffix 'E4' corresponds to the required lead-free and RoHS compliance status as defined by Texas Instruments. Confirm that the SC-70 or SOT-23 package variant matches your PCB footprint requirements. Ensure the voltage ratings align with your system's power supply specifications before finalizing procurement.

Selection Notes

Select this component when a single-channel bus switch with 5-V tolerant inputs is required for low-voltage (2.5-V/3.3-V) systems. It is suitable for applications needing powered-off protection and low capacitance. Compare against standard buffers if level shifting functionality is not explicitly needed, as this device integrates both switching and translation features.

Part Context

This part belongs to the SN74CB3T family of low-voltage bus switches from Texas Instruments. It is designed for space-constrained applications requiring efficient signal management in mobile and handheld devices. The device complements other logic families by providing robust interface solutions between varying voltage levels.

Replacement Considerations

Check for direct equivalents such as the SN74CB3T1G125 without the E4 suffix if packaging or compliance differences are acceptable. Verify pinout compatibility with alternative single FET bus switches from other manufacturers if sourcing constraints exist.