Texas Instruments

PCF8574DGVR  

I/O Expanders

PCF8574DGVR Description

The PCF8574DGVR is an I/O expander IC designed by Texas Instruments, featuring an 8-bit quasi-bidirectional I/O port and an I2C interface. This device operates within a voltage range of 2.5V to 6V and supports a clock frequency of up to 100 kHz. The PCF8574DGVR is housed in a 20-pin TVSOP package and is available in tape and reel format, making it suitable for surface mount applications. It has a moisture sensitivity level (MSL) of 1, indicating it is unaffected by moisture and can be stored without limitations.

PCF8574DGVR Features

• I/O Capability: The PCF8574DGVR provides 8 quasi-bidirectional I/O lines, allowing for flexible control and monitoring of external devices. Each I/O line can source up to 1mA and sink up to 25mA, making it suitable for driving LEDs, switches, and other low-power devices.
• I2C Interface: The device communicates via the I2C bus, which simplifies the connection to microcontrollers and other system components. This interface supports a clock frequency of up to 100 kHz, ensuring reliable and efficient data transfer.
• Power-On Reset (POR): The built-in POR feature ensures that the device initializes to a known state upon power-up, enhancing system reliability and stability.
• Interrupt Output: The PCF8574DGVR includes an interrupt output pin, which can be used to signal changes in the I/O state, allowing for efficient event-driven programming and reducing the need for continuous polling.
• Wide Operating Voltage Range: The device operates within a voltage range of 2.5V to 6V, providing compatibility with a variety of power supply configurations.
• Compliance and Standards: The PCF8574DGVR is REACH unaffected and RoHS3 compliant, meeting environmental and safety standards for electronic components. It is also classified under ECCN EAR99 and HTSUS code 8542.39.0001.

PCF8574DGVR Applications

The PCF8574DGVR is ideal for applications requiring expansion of I/O capabilities in embedded systems. Some specific use cases include:

• Industrial Automation: Expanding the number of I/O lines for controlling and monitoring sensors, actuators, and other devices in industrial control systems.
• Consumer Electronics: Enhancing the I/O capabilities of microcontroller-based systems in products such as smart home devices, wearables, and IoT devices.
• Automotive Electronics: Providing additional I/O for automotive control units, enabling connection to various sensors and actuators within the vehicle.
• Medical Devices: Expanding the I/O interface in medical equipment for monitoring and controlling various parameters and devices.

Conclusion of PCF8574DGVR

The PCF8574DGVR is a versatile I/O expander IC that offers robust performance and a wide range of features. Its quasi-bidirectional I/O lines, I2C interface, and power-on reset functionality make it a reliable choice for expanding I/O capabilities in various applications. Despite being marked as obsolete, the PCF8574DGVR remains a valuable component for designers looking to enhance the functionality of their systems with a proven and compliant device.

PCF8574DGVR Documents

Download datasheets and manufacturer documentation for PCF8574DGVR

Datasheets :

PCF8574      

PCN Obsolescence/ EOL :

EOL- 08/May/2023