PCA9671BQManufacturer: NXP Remote 16-bit I/O expander for Fm I2C-bus with reset | |||
| Partnumber | Manufacturer | Quantity | Availability |
|---|---|---|---|
| PCA9671BQ | NXP | 825 | In Stock |
Description and Introduction
Remote 16-bit I/O expander for Fm I2C-bus with reset The **PCA9671BQ** from NXP Semiconductors is a versatile I²C bus-controlled GPIO expander designed to enhance system flexibility in embedded applications. This 16-bit device enables designers to add extra input/output ports while minimizing microcontroller pin usage, making it ideal for space-constrained designs.  
Operating at voltages between 2.3V and 5.5V, the PCA9671BQ is compatible with a wide range of logic levels, ensuring seamless integration with both 3.3V and 5V systems. Unlike traditional GPIO expanders, it features quasi-bidirectional I/O ports that eliminate the need for direction configuration, simplifying software control.   The PCA9671BQ supports hot insertion and includes built-in pull-up resistors, reducing external component count. With an I²C interface, it allows multiple devices to share the same bus, enabling scalable expansion. Its interrupt output pin facilitates efficient event-driven designs by alerting the host microcontroller to input changes.   Common applications include industrial control systems, consumer electronics, and IoT devices where additional I/O is required without increasing processor complexity. Its robust design and ease of use make the PCA9671BQ a reliable choice for expanding digital interfaces in modern electronic systems. |
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Application Scenarios & Design Considerations
Remote 16-bit I/O expander for Fm I2C-bus with reset
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