PCF8574DW

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PCF8574DW

IC XPNDR 100KHZ I2C 16SOIC

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Spezifikationen

Part Status Obsolete
DigiKey Programmable Not Verified
Number of I/O 8
Interface I2C
Interrupt Output Yes
Features POR
Output Type Push-Pull
Current - Output Source/Sink 1mA, 25mA
Clock Frequency 100 kHz
Voltage - Supply 2.5V ~ 6V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 16-SOIC (0.295", 7.50mm Width)
Supplier Device Package 16-SOIC
Base Product Number PCF8574

Übersicht

Description

The PCF8574DW is an I2C-based I/O expander designed to increase the number of input/output pins available for microcontrollers. It features 8 GPIO (General Purpose Input/Output) pins that can be configured as either inputs or outputs, making it ideal for applications where more pins are needed than what the microcontroller provides.
Key features include:
1. I2C Interface: Communicates using the I2C protocol, which allows multiple devices to connect on the same bus with only two wires (SDA and SCL).
2. Addressing: Supports up to eight devices on the same bus, with configurable I2C addresses.
3. Interrupt Support: Can generate an interrupt signal when input states change, allowing efficient monitoring of inputs.
4. Wide Operating Voltage: Typically operates between 2.5V and 6V, making it compatible with various microcontrollers.
5. Low Power Consumption: Ideal for battery-powered applications.
The PCF8574DW is commonly used in various projects, such as LED control, button reading, and interfacing with other peripherals.

Features

The PCF8574DW is an I2C I/O expander that allows for the expansion of GPIO pins on microcontrollers. Key features include:
1. I2C Interface: Operates on a 2-wire I2C bus, allowing multiple devices to share the same bus.
2. 8 GPIO Pins: Provides 8 configurable I/O pins that can be set as inputs or outputs.
3. Interrupt Capability: Supports interrupt output when input pins change state, enabling efficient event handling.
4. Flexible Voltage Levels: Compatible with various logic levels (typically 2.5V to 6V) for integration with different microcontrollers.
5. Address Selection: Allows for up to 8 devices on the same I2C bus by setting different addresses through three address pins (A0, A1, A2).
6. Low Power Consumption: Designed for low power operation, making it suitable for battery-powered applications.
7. Pull-up Resistors: Internal pull-up resistors can be enabled for input pins to simplify circuit design.
This makes the PCF8574DW ideal for applications needing additional GPIO, such as controlling LEDs, switches, or sensors.

Package

The PCF8574DW is typically packaged in a 16-pin Dual In-Line Package (DIP) format. It may also be available in other package types like SOIC (Small Outline Integrated Circuit) or TSSOP (Thin Shrink Small Outline Package), depending on the manufacturer.

Pinout

The PCF8574DW is an I²C I/O expander with an 8-bit parallel I/O port. It has 16 pins in total, which include:
1. VCC (Pin 1): Power supply (typically +2.5V to +6V).
2. GPIO0 to GPIO7 (Pins 2-9): 8 general-purpose I/O pins, which can be configured as inputs or outputs.
3. SDA (Pin 10): Serial Data Line for I²C communication.
4. SCL (Pin 11): Serial Clock Line for I²C communication.
5. INT (Pin 12): Interrupt pin that can signal when an input state changes.
6. A0, A1, A2 (Pins 13-15): Address selection pins for configuring the I²C address (up to 8 possible addresses).
7. GND (Pin 16): Ground connection.
The PCF8574DW allows microcontrollers to expand their I/O capabilities easily over an I²C bus.

Manufacturer

The PCF8574DW is manufactured by NXP Semiconductors, a global semiconductor company based in the Netherlands. NXP focuses on providing high-performance mixed-signal and standard product solutions, particularly for automotive, industrial, and Internet of Things (IoT) applications. The company was formed in 2006 as a spin-off from Philips and has since become a leader in secure connectivity solutions, integrating advanced technologies in areas like RF, analog, and digital processing. NXP's products, including the PCF8574DW, are widely used in various electronic devices for interfacing and I/O expansion needs.

Application

The PCF8574DW is an I2C I/O expander used in various applications such as LED control, sensor interfacing, and keypad input for embedded systems. It enables microcontrollers to extend GPIO capabilities, making it ideal for home automation, robotics, and IoT devices. Additionally, it supports multiple devices on a single bus, facilitating communication in compact designs.

Equivalent

Equivalent products to the PCF8574DW chip include the MCP23008, MCP23017, and the TCA9535. These devices also function as I2C I/O expanders, allowing for additional GPIO pins to be controlled via the I2C bus. Make sure to check specific features such as voltage levels, pin configurations, and I2C addresses when selecting a suitable alternative.

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