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Product Detailed Parameters
- Description：IC BUS SWITCH 1 X 8:1 24VQFN
- Series：TCA
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Bus Switch
- Circuit：1 x 8:1
- Independent Circuits：1
- Current - Output High, Low：-
- Voltage Supply Source：Single Supply
- Voltage - Supply：1.65V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：24-VFQFN Exposed Pad
- Supplier Device Package：24-VQFN (4x4)
- Grade：-
- Qualification：-
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Overview
The TCA9548AMRGER is an eight-channel bidirectional translating I2C switch manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 5.5 V and supports SMBus protocols. The device features a maximum on-resistance of 70 Ohms and a maximum power supply current of 80 uA. It functions reliably across an operating temperature range from -40 °C to +85 °C. The component is housed in a VQFN-24 surface-mount package.
Feature Summary
- Provides eight independent bidirectional translating switches for I2C bus expansion
- Supports multiple I2C clock frequencies including standard, fast, and high-speed modes
- Includes a dedicated reset input pin to initialize all channels to a known state
Applications
- Expanding I2C connectivity for systems with limited controller lines
- Isolating I2C buses to prevent communication conflicts between devices
- Managing multiple peripherals sharing identical hardware addresses
Procurement Notes
Verify the specific suffix 'MRG' against the manufacturer's official documentation to confirm the reel packaging configuration and tape-and-reel specifications. Ensure the ordering part number matches the exact voltage and package requirements for your design. Cross-reference the datasheet revision date to confirm compatibility with your system constraints.
Selection Notes
Select this component when designing systems requiring isolation of up to eight distinct I2C segments. It is suitable for applications needing bidirectional level translation between different voltage domains. Consider the low quiescent current and compact VQFN-24 footprint for space-constrained portable or industrial designs.
Part Context
This part belongs to the TCA954xA series of I2C switches from Texas Instruments. It serves as a functional upgrade over legacy variants like the PCA9548A, offering extended voltage support down to 1.65 V. The series is designed to facilitate complex multi-device I2C architectures without requiring additional microcontroller pins.
Replacement Considerations
The TCA9548APWR offers the same functionality in a TSSOP-24 package. The TCA9548ARGER provides equivalent performance in a VQFN-24 package. Verify pinout compatibility and thermal characteristics before substituting these alternatives.
