PCA9555RGER
| Parameters | |
|---|---|
| Number of I/O | 16 |
| Voltage - Supply | 2.3V ~ 5.5V |
| Clock Frequency | 400 kHz |
| Current - Output Source/Sink | 10mA, 25mA |
| Interrupt Output | Yes |
| Features | POR |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | PCA9555 |
| REACH Status | REACH Unaffected |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Series | - |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 24-VFQFN Exposed Pad |
| Interface | I²C, SMBus |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Output Type | Push-Pull |
| Supplier Device Package | 24-VQFN (4x4) |
PCA9555RGER 16-bit I/O expander SMBus 400 kHz 24-VQFN
The PCA9555RGER is a 16-bit I/O expander for the I²C-bus/SMBus from Texas Instruments, housed in a 24-VQFN package, designed to provide remote parallel I/O expansion for microcontrollers, ASICs, or other digital systems via a simple two-wire serial interface. This device operates from a 2.3 V to 5.5 V supply, supports 100 kHz and 400 kHz I²C clock frequencies, and features 16 quasi-bidirectional I/O ports that can be individually configured as inputs or outputs through software, with polarity inversion capability for the input ports.
It offers robust system integration features, including an active-low interrupt output that alerts the master to input state changes without continuous polling, reducing system overhead, and internal weak pull-up resistors on the I/O pins that eliminate the need for external resistors in many applications. The device also provides eight programmable slave addresses using three address pins, allowing up to eight such expanders on the same bus, and includes configuration, input, output, and polarity inversion registers for flexible control, with all I/Os defaulting to inputs at power-on for safe system initialization.
Compatible Alternative I/O Expander List
● MCP23017-E/SP: A Microchip 16-bit I/O expander with similar I²C interface and interrupt features, offering an alternative from a different manufacturer with a DIP package option for prototyping.
● MAX7317ATG+: A Maxim Integrated (Analog Devices) 16-bit port expander with interrupt output and individual I/O configuration, providing an alternative with push-pull output drivers for applications requiring higher drive strength.
● PCA9535PW,118: An NXP 16-bit I/O expander with I²C-bus interface and interrupt, acting as a pin-compatible alternative from another major semiconductor supplier.
