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Product Detailed Parameters
- Description：IC XPNDR 400KHZ I2C SMBUS 16SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of I/O：8
- Interface：I2C, SMBus
- Interrupt Output：Yes
- Features：POR
- Output Type：Push-Pull
- Current - Output Source/Sink：-
- Clock Frequency：400 kHz
- Voltage - Supply：1.65V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
- Grade：-
- Qualification：-
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Overview
The TCA9554ADWR is an 8-bit I2C and SMBus I/O expander manufactured by Texas Instruments. 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 open-drain outputs, interrupt output capability, and configuration registers for pin direction control. It is housed in a 16-pin SOIC package with surface-mount installation. The component functions reliably across an operating temperature range from -40°C to +85°C and includes ESD protection rated at 2 kV.
Feature Summary
- Supports I2C and SMBus serial communication interfaces
- Includes dedicated interrupt output pin for event signaling
- Features configuration registers for flexible input/output assignment
Applications
- Portable systems requiring extended GPIO capabilities
- Industrial control panels utilizing I2C/SMBus networks
- Consumer electronics with limited microcontroller pins
Procurement Notes
Verify the specific suffix 'A' against official datasheets to confirm any distinct electrical or mechanical variations compared to standard variants. Ensure the SOIC-16 package dimensions match the target PCB footprint. Confirm RoHS compliance status through current manufacturer documentation before finalizing procurement orders.
Selection Notes
Select this component when an 8-bit expansion is required on an I2C bus with low-voltage operation down to 1.65 V. The SOIC-16 package suits applications needing surface-mount assembly with moderate pin density. Consider the interrupt feature if asynchronous event handling is necessary for system efficiency.
Part Context
This part belongs to the TCA9554A series of I/O expanders. It serves as a successor or variant to older models like the PCA9554, offering similar functionality with potentially updated manufacturing processes. The 'DWR' suffix indicates the 16-SOIC package and reel packaging format.
Replacement Considerations
TCA9554DWR and TCA9554ADWT are confirmed substitutes within the same family. Verify package compatibility (SOIC vs. other) and suffix-specific differences before replacement.
