Overview
The TCA9554ADBR, produced by Texas Instruments, is an 8-bit I2C/SMBus I/O expander designed to provide additional input/output (I/O) ports for various applications. This device operates within a power supply voltage range of 1.65 V to 5.5 V, making it versatile for different system requirements. It supports both Standard-mode (100 kHz) and Fast-mode (400 kHz) I2C bus frequencies, ensuring compatibility with a wide range of systems.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Power-Supply Voltage Range | 1.65 V to 5.5 V |
| I2C Bus Frequencies | 100 kHz (Standard-mode), 400 kHz (Fast-mode) |
| Number of I/O Ports | 8 bits |
| Interrupt Output | Open-Drain Active-Low |
| I/O Port Tolerance | 5-V Tolerant |
| Hardware Address Pins | A0, A1, A2 (allow up to eight devices on the same I2C/SMBus) |
| Package Type | 16-pin SSOP |
| Operating Temperature Range | -40°C to 85°C |
Key Features
- Provides 8 bits of general-purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol.
- Interrupt generated on the INT pin whenever an input port changes state.
- Three hardware selectable address pins (A0, A1, A2) allow up to eight devices on the same I2C/SMBus.
- Device can be reset to its default state by cycling the power supply and causing a power-on reset.
- Weak pull-up resistors on the I/O ports.
- Configuration registers for flexible operation.
Applications
The TCA9554ADBR is suitable for a variety of applications where additional I/O ports are required, such as:
- Switches and push-buttons.
- Sensors and monitoring systems.
- LED indicators and display systems.
- Fans and other motor control systems.
- General-purpose I/O expansion in embedded systems.
Q & A
- What is the operating voltage range of the TCA9554ADBR?
The operating voltage range is from 1.65 V to 5.5 V.
- What I2C bus frequencies does the TCA9554ADBR support?
The device supports both 100 kHz (Standard-mode) and 400 kHz (Fast-mode) I2C bus frequencies.
- How many I/O ports does the TCA9554ADBR provide?
The device provides 8 bits of general-purpose parallel input/output (I/O) expansion.
- What type of interrupt output does the TCA9554ADBR have?
The interrupt output is open-drain active-low.
- Can multiple TCA9554ADBR devices be connected on the same I2C/SMBus?
- What is the package type of the TCA9554ADBR?
The device is packaged in a 16-pin SSOP.
- What is the operating temperature range of the TCA9554ADBR?
The operating temperature range is from -40°C to 85°C.
- How can the TCA9554ADBR be reset to its default state?
The device can be reset by cycling the power supply and causing a power-on reset.
- What types of applications is the TCA9554ADBR suitable for?
The device is suitable for applications such as switches, sensors, LEDs, fans, and general-purpose I/O expansion in embedded systems.
- Does the TCA9554ADBR have weak pull-up resistors on the I/O ports?
