PCF8574T/3,518

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PCF8574T/3,518

IC XPNDR 100KHZ I2C 16SO

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規格

Part Status Last Time Buy
DigiKey Programmable Not Verified
Number of I/O 8
Interface I2C
Interrupt Output Yes
Features POR
Output Type Push-Pull
Current - Output Source/Sink 300µA, 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-SO
Base Product Number PCF8574

概述

Description

The PCF8574T is an I2C I/O expander that allows for the expansion of input/output pins for microcontrollers. It features eight GPIO pins and communicates via the I2C bus, enabling easy integration with various devices like sensors and displays. The "T" in its designation typically indicates the package type, with "3,518" possibly referring to a specific part number or production code related to its manufacturing.
Key features include:
- I2C Interface: Supports multiple devices on a single bus with addressable options.
- GPIO Pins: Configurable as input or output, allowing flexible interfacing.
- Interrupt Capabilities: Can send interrupts to the microcontroller, prompting immediate attention to changes in inputs.
The PCF8574T is widely used in embedded systems for simplifying the design of applications requiring additional I/O capabilities without increasing the complexity of the circuit. It is particularly useful in Arduino and Raspberry Pi projects for enhancing functionality in compact designs.

Features

The PCF8574T/3 is an I2C I/O expander designed for microcontrollers. Key features include:
1. I2C Interface: Supports 2-wire I2C communication, allowing easy integration with various microcontrollers.
2. 8-bit I/O Ports: Provides 8 GPIO pins, which can be configured as input or output.
3. Interrupt Functionality: Supports interrupt-driven operation, allowing efficient handling of input changes.
4. Addressing: Can connect up to 8 devices on the same I2C bus with unique addresses (0x20 to 0x27).
5. Open-Drain Outputs: Outputs are open-drain, enabling simple interfacing with various logic levels.
6. Low Power Consumption: Operates with low power requirements, making it suitable for battery-powered applications.
7. Wide Voltage Range: Supports a supply voltage from 2.5V to 6V, enhancing flexibility for different applications.
8. High Noise Immunity: Robust against noise, ensuring reliable operation in diverse environments.
These features make the PCF8574T/3 ideal for expanding I/O capabilities in embedded systems.

Package

The PCF8574T/3,518 is typically packaged in a 16-pin DIP (Dual In-line Package) or a similar surface mount package. This allows for easy integration into electronic circuits for I2C GPIO expansion.

Pinout

The PCF8574T/3,518 is an I2C I/O expander with a total of 16 pins. Its pin configuration includes:
1. VCC (Pin 1): Power supply (typically 2.5 to 6V).
2. GND (Pin 2): Ground connection.
3. SDA (Pin 3): Serial Data Line for I2C communication.
4. SCL (Pin 4): Serial Clock Line for I2C communication.
5. A0, A1, A2 (Pins 5, 6, 7): Address selection pins to set the I2C address (3-bit address).
6. P0 to P7 (Pins 8-15): Eight GPIO pins used for input or output.
7. INT (Pin 16): Interrupt output pin, which can signal changes in GPIO pin states.
The PCF8574T allows for the expansion of the number of I/O ports on microcontrollers, making it useful for applications requiring multiple input/output capabilities through I2C.

Manufacturer

The PCF8574T/3,518 is manufactured by NXP Semiconductors, a global semiconductor company known for its innovative solutions in automotive, industrial, and Internet of Things (IoT) applications. NXP specializes in designing and manufacturing microcontrollers, processors, and various integrated circuits, focusing on connectivity, security, and processing solutions. The company emerged from the spin-off of Philips' semiconductor division in 2006 and has since established itself as a key player in the semiconductor industry, serving a wide range of markets, including automotive, mobile, and consumer electronics.

Application

The PCF8574T/3,518 is a versatile I/O expander used primarily in microcontroller applications to increase the number of input/output pins. Common application areas include interfacing with buttons, LEDs, sensors, and displays in embedded systems, automation, and robotics. It is often utilized in projects requiring multiple I/O connections, such as home automation, industrial control, and consumer electronics, enabling efficient communication via I2C bus.

Equivalent

The PCF8574T/3,518 is an I2C I/O expander. Equivalent products include:
1. MCP23008 - 8-bit I/O expander with I2C interface.
2. MCP23017 - 16-bit I/O expander with I2C interface.
3. TCA9535 - 16-bit I/O expander with I2C interface.
4. PCA9554 - 8-bit I/O port with I2C.
5. PCA9535 - 16-bit I/O port with I2C.
Ensure to check voltage levels and specific features for compatibility.

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