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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 (0.154", 3.90mm Width)
- Supplier Device Package：16-SSOP
- Grade：-
- Qualification：-
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Overview
The TCA9554DBQR is a remote 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 capable of sourcing or sinking 10 mA or 25 mA, depending on the specific configuration. It includes an interrupt output pin and configuration registers for flexible control. The component is housed in a 16-pin SSOP package and is rated for operation between -40°C and +85°C.
Feature Summary
- Supports I2C and SMBus communication protocols for system integration
- Provides configurable interrupt output for efficient event handling
- Includes configuration registers to define input or output directions
Applications
- Portable devices requiring low-power I/O expansion
- Industrial control systems utilizing SMBus interfaces
- Consumer electronics with limited microcontroller pins
Procurement Notes
Verify the exact suffix DBQR corresponds to the 16-SSOP package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure compatibility with existing PCB footprints designed for SSOP-16 components. Check for any specific moisture sensitivity level requirements during storage and handling procedures.
Selection Notes
Select this component when an 8-bit I/O expansion solution is required with I2C/SMBus compatibility. The wide voltage range suits applications powered by various logic levels. Consider the SSOP package size constraints against available board space. Verify that the interrupt functionality meets the system's real-time response needs compared to polling methods.
Part Context
This part belongs to the TCA9554A family of remote I/O expanders. It shares core functionalities with other variants like TCA9554ADWR but differs in packaging. The family is designed for low-voltage applications requiring reliable digital interface expansion. It serves as a direct replacement for older PCA9554 series devices in many designs.
Replacement Considerations
- TCA9554ADWR
- TCA9554APWR
FAQ
What is the maximum clock frequency supported by the TCA9554DBQR?
The device supports standard mode (100 kHz) and fast mode (400 kHz) I2C/SMBus clock frequencies.
Does the TCA9554DBQR include an interrupt output?
Yes, the device features an interrupt output pin to signal state changes on the inputs.
What is the operating temperature range for this component?
The specified operating temperature range is from -40°C to +85°C.
