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Product Detailed Parameters
- Description：IC XPNDR 400KHZ I2C SMBUS 24SSOP
- 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-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：24-SSOP
- Grade：-
- Qualification：-
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Overview
The TCA9555DBR is a remote 16-bit I/O expander manufactured by Texas Instruments, designed for I2C and SMBus interfaces. 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 push-pull outputs and includes an interrupt output pin for efficient event handling. It is housed in a 24-pin SSOP package and functions reliably across an operating temperature range of -40°C to +85°C. Key internal features include configuration registers that allow individual pin direction setting.
Feature Summary
- Supports I2C and SMBus serial communication protocols for system integration
- Provides 16 general-purpose digital input/output channels with configurable directions
- Includes dedicated interrupt output pin to signal state changes to the host processor
Applications
- Portable devices requiring extended I/O capabilities within limited space
- Industrial control systems utilizing I2C or SMBus networks
- Consumer electronics needing additional GPIO expansion via serial interfaces
Procurement Notes
Verify the specific ordering suffix against official Texas Instruments documentation to confirm package type and tape/reel specifications. Ensure compatibility with system voltage levels and interface requirements before procurement. Confirm RoHS compliance status through current manufacturer datasheets.
Selection Notes
Select this component when a 16-bit I/O expansion solution is required with low-voltage operation down to 1.65 V. Compare against the PCA9555 series if higher drive currents or different voltage ranges are needed. Verify package availability and lead times through authorized distributors.
Part Context
This part belongs to the TCA9555 family of I/O expanders from Texas Instruments. It shares functional similarities with the PCA9555 but offers a lower minimum operating voltage. The DBR suffix indicates a 24-SSOP package supplied in a reel format for surface-mount assembly.
Replacement Considerations
The PCA9555DBR is a documented alternative within the same product family. Verify voltage range differences and package compatibility before substitution.
