74CB3T1G125DCKRG4

Overview

The SN74CB3T1G125DCKRG4 is a single FET low-voltage bus switch manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 3.6 V and features a 5-V tolerant level shifter for signal path translation. The device provides powered-off protection, ensuring no current flows when the power supply is off. Key electrical parameters include a maximum supply current of 20 µA, an input/output continuous current rating of 128 mA, and an on-state leakage current of 10 µA. Typical capacitance values are 12 pF for CON and 5 pF for COFF. It supports an operating temperature range from -40°C to 85°C and includes ESD protection rated at 2 kV (HBM) and unspecified CDM levels.

Feature Summary

• Provides signal path translation between different voltage domains using a 5-V tolerant level shifter.
• Includes powered-off protection to prevent back-powering or excessive current draw during power-down states.
• Features low capacitance characteristics suitable for high-speed data transmission applications.

Applications

• Portable equipment requiring low-voltage operation
• Consumer electronics with mixed voltage domains
• Communications equipment utilizing level shifting

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per Texas Instruments documentation. Confirm the SC-70-5 package type matches the design requirements. Ensure the catalog rating aligns with the intended production volume and quality standards. Cross-reference the datasheet revision date to ensure all electrical specifications remain current for the manufacturing batch.

Selection Notes

Select this component when a single-channel bus switch is required for 2.5-V or 3.3-V systems interfacing with 5-V tolerant nodes. The low supply current and small SC-70-5 package make it suitable for space-constrained portable designs. Consider the 128 mA continuous current capability for driving moderate loads without significant voltage drop across the switch.

Part Context

This part belongs to the SN74CB3T1G series of low-voltage bus switches from Texas Instruments. It is designed for applications requiring efficient level shifting and signal routing in low-power environments. The device integrates a single FET switch with control logic to manage signal direction and isolation based on the enable input state.

Replacement Considerations

Public confirmed substitute part numbers: SN74CB3T1G125DCKR, SN74CB3T1G125DCKRE4.