Overview
The PCA9554DTR2G, produced by onsemi, is a CMOS device designed to provide 8-bit parallel input/output port expansion for I2C and SMBus compatible applications. This I/O expander offers a simple solution for scenarios where additional I/Os are required, such as in the control of sensors, power switches, LEDs, pushbuttons, and fans. The device features an I2C/SMBus-compatible serial interface and includes input, output, configuration, and polarity inversion registers. It is particularly useful in applications needing remote I/O expansion for most microcontroller families via the I2C interface.
Key Specifications
| Specification | Details |
|---|---|
| Operating Power-Supply Voltage | 2.3 V to 5.5 V |
| I2C Bus Compatibility | 400 kHz |
| I/O Configuration | Individual I/O configuration; default to inputs at power-up |
| Interrupt Output | Active low interrupt output |
| Addressing Capability | Up to 8 devices can share the same bus using three hardware address pins (A0, A1, A2) |
| Package Type | 16-lead TSSOP |
| Environmental Compliance | Pb-free, Halogen free/BFR free, and RoHS compliant |
| Temperature Range | Industrial temperature range |
| ESD Protection | Exceeds JESD 22 – 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- 400 kHz I2C Bus Compatible
- 5 V Tolerant I/Os
- High Drive Capability for directly driving LEDs
- Individual I/O Configuration
- Polarity Inversion Register
- Active Low Interrupt Output
- Internal Power-On Reset
- No Glitch on Power-Up
- Noise Filter on SDA/SCL Inputs
- Cascadable up to 8 Devices
- Low Standby Current
Applications
- White Goods (dishwashers, washing machines)
- Handheld Devices (cell phones, PDAs, digital cameras)
- Data Communications (routers, hubs, and servers)
- Sensors, power switches, LEDs, pushbuttons, and fans
Q & A
- What is the PCA9554DTR2G used for?
The PCA9554DTR2G is used for 8-bit parallel input/output port expansion in I2C and SMBus compatible applications, providing additional I/Os for various devices such as sensors, power switches, LEDs, pushbuttons, and fans.
- What is the operating voltage range of the PCA9554DTR2G?
The operating power-supply voltage range is from 2.3 V to 5.5 V.
- How many devices can share the same I2C bus?
Up to 8 devices can share the same I2C bus using the three hardware address pins (A0, A1, A2).
- What type of interrupt output does the PCA9554DTR2G have?
The PCA9554DTR2G features an active low interrupt output.
- Is the PCA9554DTR2G RoHS compliant?
- What is the package type of the PCA9554DTR2G?
The package type is a 16-lead TSSOP.
- Can the I/O pins be configured individually?
- Does the PCA9554DTR2G have ESD protection?
- What is the temperature range for the PCA9554DTR2G?
The PCA9554DTR2G operates within the industrial temperature range.
- Does the PCA9554DTR2G have noise filtering on the SDA/SCL inputs?
