TIPCA9555DBR
Overview
The PCA9555DBR is a 16-bit I/O expander designed for I2C or SMBus applications, providing a remote GPIO solution via a two-wire serial interface. It operates over a wide voltage range of 2.3V to 5.5V and features an interrupt output to notify the host processor of input state changes.
Why Choose This Part
This device offers high-current drive capability for LEDs and includes a polarity inversion register for flexible logic configuration. The hardware address pins allow up to eight devices on the same I2C bus, enabling a total of 128 additional I/O ports.
Applications
Key Specifications
Getting Started
To implement this part, connect the SDA and SCL pins to the host I2C bus with appropriate pull-up resistors and set the hardware address pins (A0, A1, A2). Software development involves writing to the Configuration register to set pin direction and reading the Input Port register to capture state changes signaled by the active-low interrupt pin.
PCA9555 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Stock |
|---|---|---|
| PCA9555DBR (this part) | SSOP-24 | 1,381 |
| PCA9555PWJ (Nexperia USA Inc.) | TSSOP-24 | 157 |
| PCA9555BSHP (NXP USA Inc.) | VFQFN-24 | — |
| PCA9555DGVR | TFSOP-24 | — |
| PCA9555DW | SOIC-24 | 1,967 |
| PCA9555RGER | VFQFN-24 | — |
