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Product Detailed Parameters
- Description：IC XPND 400KHZ I2C SMBUS 24TSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of I/O：16
- Interface：I2C, SMBus
- Interrupt Output：Yes
- Features：POR
- Output Type：Push-Pull
- Current - Output Source/Sink：10mA, 25mA
- Clock Frequency：400 kHz
- Voltage - Supply：1.65V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：24-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：24-TSSOP
- Grade：-
- Qualification：-
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Overview
The TCA9535PWR is a low-voltage 16-bit I/O expander manufactured by Texas Instruments, designed for I2C and SMBus communication. It operates within a supply voltage range of 1.65 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features an interrupt output and configuration registers, housed in a 24-pin TSSOP package suitable for surface mount installation. It provides ESD protection rated at 2 kV and functions reliably across a temperature range from -40°C to +85°C.
Feature Summary
- Supports I2C and SMBus serial interfaces for system connectivity
- Includes dedicated interrupt output pin for event signaling
- Features configuration registers for flexible input/output setup
Applications
- Portable consumer electronics requiring extended I/O capabilities
- Industrial control systems utilizing I2C/SMBus networks
- Embedded devices needing low-power peripheral expansion
Procurement Notes
Verify the specific revision level against the latest Texas Instruments datasheet before procurement. Confirm that the TSSOP-24 package dimensions align with the target PCB footprint. Ensure the operating voltage requirements of the host system fall within the 1.65 V to 5.5 V range specified for this component.
Selection Notes
Select the TCA9535PWR when a 16-bit expansion is required with low-voltage operation down to 1.65 V. Compare against the PCA9535 variant if the minimum supply voltage requirement is higher, as the PCA9535 starts at 2.3 V. Consider the interrupt capability and configuration register availability for complex system designs.
Part Context
This component belongs to the TCA9535 series of low-power I/O expanders. It shares functional similarities with the PCA9535 but offers a lower minimum operating voltage. The PWR suffix indicates the TSSOP-24 package type, distinguishing it from other packaging options available within the same product family.
Replacement Considerations
The PCA9535PWR is a related part number within the same manufacturer's portfolio. Designers should verify voltage compatibility, as the PCA9535 has a higher minimum operating voltage of 2.3 V compared to the TCA9535's 1.65 V.
