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Product Detailed Parameters
- Description：IC XPNDR 400KHZ I2C SMBUS 16SSOP
- 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-SSOP (0.154", 3.90mm Width)
- Supplier Device Package：16-SSOP
- Grade：-
- Qualification：-
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Overview
The TCA9554ADBQR is an 8-bit I/O expander from the TCA9554A series, manufactured by Texas Instruments. It operates on a supply voltage range of 1.65V to 5.5V and supports I2C and SMBus interfaces with a maximum clock frequency of 400kHz. The device features open-drain outputs and includes configuration registers and an interrupt pin. It is housed in a VSSOP-16 package, suitable for surface mount applications. The component functions within a temperature range of -40°C to +85°C.
Feature Summary
- Supports I2C and SMBus serial communication protocols
- Includes dedicated interrupt output capability
- Features programmable configuration registers
Applications
- Remote I/O expansion in embedded systems
- Consumer electronics interface management
- Industrial control system input/output handling
Procurement Notes
Verify the specific suffix 'ADBQR' against the manufacturer's current datasheet to confirm package type and availability status. Check for any recent product change notices or lifecycle updates that may affect long-term supply. Ensure compatibility with existing board designs regarding footprint and electrical specifications before finalizing procurement decisions.
Selection Notes
Select this component when an 8-bit I/O expander with low-voltage operation down to 1.65V is required. It is suitable for applications needing I2C/SMBus connectivity and interrupt-driven functionality. Consider the VSSOP-16 package constraints for PCB layout. Compare against similar devices if higher current drive or different package options are needed.
Part Context
The TCA9554ADBQR belongs to the TCA9554A family of 8-bit I/O expanders. This series provides general-purpose remote I/O expansion via two-line bidirectional buses. The 'ADBQR' suffix typically denotes a specific tape-and-reel packaging variant optimized for automated assembly processes, distinguishing it from cut-tape or tube-packaged versions.
Replacement Considerations
The PCA9554DW is listed as a discontinued alternative with similar I2C/SMBus capabilities but uses a push-pull output structure instead of open-drain. Verify voltage levels and output drive requirements when substituting. Other TCA9554 variants like TCA9554PWR offer different packages but share core functionality.
