PCF8574T/3,518-NXP-I/O Expander, 8 bit, I2C, 2.5 V, 6 V, SOIC, 16 Pins


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Approx Restocking Date: 25 to 30 Days
SKU: 1881791
  1. No. of Bits: 8bit
  2. No. of Pins: 16Pins
  3. No. of I/Os: 8I/O’s
  4. Supply Voltage Min: 2.5V
  5. Supply Voltage Max: 6V


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Brand: NXP
Category: Microcontroller IC

The PCF8574T/3,518 is an 8-bit remote I/O Expander for I²C-bus with interrupt. It provides general-purpose remote I/O expansion via the two-wire bidirectional I²C-bus (serial clock (SCL), serial data (SDA)). The devices consist of eight quasi-bidirectional ports, 100KHz I²C-bus interface, three hardware address inputs, and interrupt output operating between 2.5 and 6V. The quasi-bidirectional port can be independently assigned as an input to monitor interrupt status or keypads or as an output to activate indicator devices such as LEDs. The low current consumption of 2.5µA (typical, static) is great for mobile applications, and the latched output ports directly drive LEDs.


  1. The PCF8574T/3,518 is designed to expand the digital input/output (I/O) capabilities of microcontrollers.
  2. It provides 8 bits of I/O, allowing for versatile control and sensing in electronic applications.
  3. Utilizes the I2C (Inter-Integrated Circuit) protocol for efficient and standardized communication between devices.
  4. Comes in a Small Outline Integrated Circuit (SOIC) package with 16 pins, facilitating compact and space-efficient integration onto circuit boards.
  5. Suitable for a range of applications, including industrial automation, robotics, and other electronic systems requiring expanded I/O capabilities.
  6. Manufactured by NXP, a reputable semiconductor company, ensuring reliability and performance in electronic designs.

Package Includes:

1 x PCF8574T/3,518-NXP-I/O Expander, 8 bit, I2C, 2.5 V, 6 V, SOIC, 16 Pins

SKU: 1881791 Category:
No. of Bits


No. of Pins


No. of I/Os


Supply Voltage Min


Supply Voltage Max


Operating Temperature (°C)


Operating Temperature Max


IC Case / Package


Shipping Weight 0.002 kg
Shipping Dimensions 9 × 7 × 2 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China