PCF8574T/3,512

Product Overview

Category

The PCF8574T/3,512 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used as an I/O expander for microcontrollers or other digital systems.

Characteristics

• The PCF8574T/3,512 is a 16-pin IC with 8-bit remote I/O expansion capabilities.
• It operates at a voltage range of 2.5V to 6V, making it suitable for various applications.
• This IC is compatible with both 3.3V and 5V microcontrollers.
• It offers a low standby current consumption, making it energy-efficient.

Package

The PCF8574T/3,512 is available in a small outline package (SOT96-1) with 16 pins.

Essence

The essence of this IC lies in its ability to expand the input/output capabilities of microcontrollers or digital systems.

Packaging/Quantity

The PCF8574T/3,512 is typically packaged in reels or tubes, and the quantity per package varies depending on the manufacturer's specifications.

Specifications

• Supply Voltage: 2.5V to 6V
• Input/Output Voltage: 0V to VDD
• Maximum Output Current: 25mA per channel
• Standby Current: 10μA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. A0: Address Input
2. A1: Address Input
3. A2: Address Input
4. GND: Ground
5. P0: I/O Port 0
6. P1: I/O Port 1
7. P2: I/O Port 2
8. P3: I/O Port 3
9. P4: I/O Port 4
10. P5: I/O Port 5
11. P6: I/O Port 6
12. P7: I/O Port 7
13. INT: Interrupt Output
14. SDA: Serial Data Input/Output
15. SCL: Serial Clock Input
16. VDD: Supply Voltage

Functional Features

• The PCF8574T/3,512 provides 8-bit bidirectional I/O expansion through the I2C bus.
• It can be cascaded with multiple devices to expand the number of I/O ports.
• This IC supports both input and output operations on each port independently.
• It offers an interrupt output that can be used to notify the microcontroller of any changes in the input status.

Advantages and Disadvantages

Advantages

• Easy to interface with microcontrollers using the I2C protocol.
• Low power consumption, suitable for battery-powered applications.
• Can be used to increase the number of I/O ports without requiring additional pins on the microcontroller.

Disadvantages

• Limited maximum output current per channel (25mA).
• Requires external pull-up resistors for the I2C bus.

Working Principles

The PCF8574T/3,512 operates based on the I2C (Inter-Integrated Circuit) communication protocol. It acts as a slave device, controlled by a master device (typically a microcontroller). The master sends commands and data to the PCF8574T/3,512 via the SDA (Serial Data) and SCL (Serial Clock) lines. The IC interprets these commands and controls the I/O ports accordingly.

Detailed Application Field Plans

The PCF8574T/3,512 finds applications in various fields, including but not limited to: 1. Home automation systems 2. Industrial control systems 3. Robotics 4. Automotive electronics 5. IoT (Internet of Things) devices

Detailed and Complete Alternative Models

1. PCF8574AP: Similar to PCF8574T/3,512 but available in a different package (DIP16).
2. MCP23017: Another I/O expander IC with similar functionality but higher maximum output current.
3. MAX7313: I/O expander IC with additional features like LED driver capabilities.

These alternative models can be considered based on specific requirements and compatibility with the target system.

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