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Product Detailed Parameters
- Description：IC BUS SWITCH 1 X 1:1 SC70-5
- Series：74CB
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT),Bulk
- Type：Bus Switch
- Circuit：1 x 1:1
- Independent Circuits：1
- Current - Output High, Low：-
- Voltage Supply Source：Single Supply
- Voltage - Supply：2.3V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：5-TSSOP, SC-70-5, SOT-353
- Supplier Device Package：SC-70-5
- Grade：-
- Qualification：-
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Overview
The SN74CB3T1G125DCKR 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 operating temperature range from -40°C to 85°C. The device features powered-off protection and signal path translation capabilities. Key electrical parameters include a maximum supply current of 20 µA, input/output continuous current of 128 mA, typical on-state capacitance (CON) of 12 pF, and typical off-state capacitance (COFF) of 5 pF. Logic thresholds are defined by a minimum VIH of 2 V and a maximum VIL of 0.8 V.
Feature Summary
- Provides signal path translation between different voltage domains while maintaining 5-V tolerance.
- Includes powered-off protection to prevent current leakage when the device is unpowered.
- Features low on-state capacitance for high-speed signal integrity in low-voltage applications.
Applications
- Low-voltage bus switching in portable electronic devices
- Signal translation between 2.5-V/3.3-V systems and 5-V tolerant interfaces
- Battery-powered equipment requiring powered-off protection
Procurement Notes
Verify the specific ordering suffix 'DCKR' to confirm the SC-70-5 package type and reel packaging configuration. Ensure compatibility with the required 2.3-V to 3.6-V supply voltage range and -40°C to 85°C operating temperature. Confirm that the single-channel architecture meets the system's I/O requirements.
Selection Notes
Select this component for applications requiring a single-channel bus switch with 5-V tolerant level shifting capabilities. It is suitable for low-voltage systems operating between 2.3 V and 3.6 V where powered-off protection is necessary. Consider the SC-70-5 package size for space-constrained designs and verify that the 128 mA continuous current rating aligns with load requirements.
Part Context
This part belongs to the SN74CB3T1G series of single FET bus switches designed for low-voltage operation. It is distinct from buffer-based variants like the SN74LV1T125 or higher-voltage switches. The device integrates level-shifting functionality specifically for translating signals between lower voltage domains and 5-V tolerant interfaces.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other SN74CB3T1G variants if pinout and electrical characteristics match.
