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Product Detailed Parameters
- Description：IC XPNDR 400KHZ I2C 16SSOP
- 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-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：16-SSOP
- Grade：-
- Qualification：-
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Overview
The TCA9554DBR is an 8-bit I/O expander from 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 open-drain outputs, interrupt output capability, and configuration registers for input/output direction control. It is housed in a 16-SSOP package with a width of 5.30 mm. The component functions reliably across an operating temperature range of -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 I/O direction setup
Applications
- Portable systems requiring low-voltage operation
- Industrial control applications with extended temperature requirements
- Consumer electronics utilizing I2C/SMBus buses
Procurement Notes
Verify the specific package type and manufacturer documentation when sourcing. Confirm RoHS compliance status through official datasheets or distributor specifications. Ensure the ordering suffix matches the required tape-and-reel packaging format for automated assembly processes.
Selection Notes
Select this component for designs needing 8 additional GPIO pins via standard two-wire interfaces. Consider the 1.65 V minimum supply voltage for compatibility with modern low-power logic families. Verify that the 16-SSOP footprint fits the available PCB space constraints.
Part Context
This part belongs to the TCA9554A series of low-voltage I/O expanders. It serves as a surface-mount solution for expanding microcontroller ports. The DBR suffix indicates the SSOP package variant, distinguishing it from other form factors like TSSOP or SOIC within the same functional family.
Replacement Considerations
TCA9554ADBR shares identical electrical characteristics and functionality but utilizes a different SSOP package variant. PCA9554DBR is functionally similar but typically specifies a higher minimum operating voltage of 2.3 V.
