74CB3T1G125DBVRG4

Overview

The SN74CB3T1G125DBVRG4 is a single FET bus switch manufactured by Texas Instruments, designed for low-voltage applications. It operates within a supply voltage range of 2.0 V to 3.6 V and features 5-V tolerant level shifting capabilities. The device provides powered-off protection to prevent current leakage when the power supply is off. Key electrical parameters include a maximum on-state resistance of 12 ohms, typical capacitance values of 12 pF (CON) and 5 pF (COFF), and an operating temperature range from -40°C to +85°C. It is housed in a compact SOT-23-5 package.

Feature Summary

• Integrates a single FET bus switch with 5-V tolerant level shifter functionality
• Provides powered-off protection to isolate signals during power loss
• Supports signal path translation between low-voltage domains and 5-V systems

Applications

• Low-voltage bus switching in portable electronic devices
• Signal translation between different voltage domains
• Battery-powered equipment requiring powered-off protection

Procurement Notes

Verify the complete part number including the G4 suffix to ensure compliance with RoHS standards and lead-free manufacturing requirements. Confirm that the SOT-23-5 package matches your PCB footprint design. Ensure the operating environment stays within the specified -40°C to +85°C temperature range for reliable performance. Check datasheet specifications for ESD protection ratings relevant to your assembly process.

Selection Notes

Select this component when a single-channel bus switch with 5-V tolerance is required for low-voltage systems. It is suitable for applications needing signal translation between 2.5-V or 3.3-V logic levels and 5-V interfaces. Consider its low capacitance and fast switching characteristics for high-speed data lines. Verify that the 12-ohm on-resistance meets your signal integrity requirements.

Part Context

This device belongs to the SN74CB3T1G series of single FET bus switches from Texas Instruments. It is part of a family of components designed for low-voltage, high-speed bus-oriented switching and voltage translation. The series offers various configurations to support different system architectures requiring efficient signal routing between disparate voltage domains.

FAQ

Does the SN74CB3T1G125DBVRG4 provide protection against current flow when powered off?

Yes, the device includes powered-off protection circuitry to prevent unwanted current leakage through the signal path when the supply voltage is absent.

What is the maximum supply voltage supported by this bus switch?

The device supports a supply voltage range up to 3.6 V, while its inputs are tolerant to 5-V signals for level shifting purposes.