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Product Detailed Parameters
- Description：IC XPNDR 400KHZ I2C 16SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of I/O：8
- Interface：I2C
- 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 TCA9554DWR is an 8-bit I/O expander manufactured by Texas Instruments, designed for I2C and SMBus communication interfaces. It operates within a supply voltage range of 1.65V to 5.5V and supports clock frequencies up to 400 kHz. The device features push-pull outputs with current capabilities of 10mA and 25mA, and includes an interrupt output pin. It is housed in a 16-SOIC package (7.50mm width) and functions reliably across a temperature range of -40°C to +85°C. Key internal features include configuration registers and power-on reset (POR) functionality.
Feature Summary
- Supports standard I2C and SMBus protocols for system integration
- Provides configurable interrupt output for efficient event handling
- Includes dedicated configuration registers for flexible I/O direction control
Applications
- Remote I/O expansion in embedded systems
- Consumer electronics requiring additional GPIO pins
- Industrial control interfaces utilizing SMBus communication
Procurement Notes
Verify the specific suffix 'DWR' indicates tape-and-reel packaging when sourcing. Confirm RoHS3 compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the component matches the required 16-SOIC footprint for PCB layout compatibility.
Selection Notes
Select this component when an 8-bit I/O expander with push-pull outputs is required for low-voltage applications down to 1.65V. Compare against the PCA9554 series if higher minimum voltage operation at 2.3V is acceptable, noting that the TCA9554 offers broader voltage flexibility. Verify interrupt line compatibility with the host microcontroller.
Part Context
The TCA9554DWR belongs to the TCA9554 family, which serves as a successor or variant to the older PCA9554 series. While the PCA9554DW is marked as obsolete, the TCA9554 series remains active. This part shares functional similarities but may differ in electrical specifications such as minimum operating voltage and output drive characteristics compared to its predecessor.
Replacement Considerations
TCA9554APWR: Pin-compatible alternative in TSSOP-16 package. TCA9554ADWT: Tape-and-reel version in SOIC-16 package. PCA9554DW: Obsolete predecessor; verify voltage and current differences before substitution.
