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Product Detailed Parameters
- Description：IC MULTIPLEXER 1 X 1:4 20TSSOP
- Series：TCA
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Multiplexer
- Circuit：1 x 1:4
- 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：20-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：20-TSSOP
- Grade：-
- Qualification：-
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Overview
The TCA9544APWR is a quad bidirectional translating switch manufactured by Texas Instruments, designed for I2C and SMBus systems. It operates within a supply voltage range of 1.65 V to 5.5 V and features a maximum on-resistance of 16 Ohms. The device supports four independent switches with a maximum power dissipation of 400 mW and a maximum supply current of 50 uA. It functions reliably across an operating temperature range from -40°C to +85°C. The component is housed in a TSSOP-20 surface-mount package.
Feature Summary
- Provides four independent bidirectional translating switches for I2C and SMBus bus extension
- Enables selection of one downstream channel at a time via programmable control register
- Supports mixed-mode signal operation and accommodates standard and fast mode devices
Applications
- Extending I2C or SMBus bus topology without performance degradation
- Connecting multiple slave devices to a single upstream master controller
- Facilitating communication between different voltage domains in mixed-signal systems
Procurement Notes
Verify the specific suffix 'PWR' corresponds to the TSSOP-20 package and reel/cut-tape availability. Confirm RoHS compliance status through official documentation. Ensure the operating voltage requirements align with the 1.65 V to 5.5 V specification before integration into the target circuit design.
Selection Notes
Select this component when a single upstream I2C/SMBus connection must fan out to four distinct downstream channels. Choose the TCA9544APWR over the PCA9544A variant if lower on-resistance (16 Ohms vs 45 Ohms) and a wider voltage range starting at 1.65 V are required. Consider the TSSOP-20 package constraints for PCB layout.
Part Context
This part belongs to the TCA9544A series of bidirectional translating switches. It shares functional similarities with the PCA9544A but offers improved electrical characteristics regarding on-resistance and minimum operating voltage. Both variants serve as multiplexers for I2C buses, allowing system designers to expand address space and isolate bus segments.
Replacement Considerations
The PCA9544ARGYR serves as a functional alternative within the same family. Note that the PCA9544ARGYR utilizes a VQFN-20 package and has a higher on-resistance of 45 Ohms with a minimum voltage of 2.3 V. Verify pinout compatibility and thermal management requirements when substituting.
