PCF8574DWRManufacturer: TI Remote 8-Bit I/O Expander for I2C-Bus | |||
| Partnumber | Manufacturer | Quantity | Availability |
|---|---|---|---|
| PCF8574DWR | TI | 3000 | In Stock |
Description and Introduction
Remote 8-Bit I/O Expander for I2C-Bus The **PCF8574DWR** is a versatile **I/O expander** integrated circuit designed to simplify interfacing between microcontrollers and peripheral devices. Utilizing the **I²C-bus protocol**, this 8-bit remote I/O expander allows for bidirectional communication, making it ideal for applications requiring additional input/output ports without increasing microcontroller pin count.  
Housed in a **SOIC-16 package**, the PCF8574DWR features **quasi-bidirectional I/O pins** that can be individually configured as inputs or outputs. Each pin includes a weak pull-up resistor, eliminating the need for external components in many cases. With an operating voltage range of **2.5V to 6V**, it is compatible with a wide variety of microcontrollers and logic levels.   Key applications include **keypad interfacing, LED control, sensor monitoring, and industrial automation**, where efficient I/O expansion is crucial. The device also supports **interrupt functionality**, enabling efficient event-driven designs by alerting the microcontroller when input states change.   Designed for **low-power operation**, the PCF8574DWR is well-suited for battery-powered systems. Its compact footprint and ease of integration make it a reliable choice for engineers seeking a cost-effective solution for expanding digital I/O capabilities in embedded systems. |
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Application Scenarios & Design Considerations
Remote 8-Bit I/O Expander for I2C-Bus
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