PCA8574TS,112

Overview

Category: Integrated Circuit (IC)

Use: I/O Expander

Characteristics: - 8-bit remote I/O expander for I2C-bus - Low standby current consumption of 10 µA - Operating voltage range: 2.3 V to 5.5 V - Open-drain interrupt output - Compatible with most microcontrollers - Address by three hardware address pins for use of up to eight devices on the same bus

Package: TSSOP16

Essence: The PCA8574TS,112 is an integrated circuit that serves as an I/O expander. It allows a microcontroller to communicate with and control multiple input/output devices using only a few pins.

Packaging/Quantity: The PCA8574TS,112 is typically sold in reels or tubes containing 2500 units per package.

Specifications

• Supply Voltage Range: 2.3 V to 5.5 V
• Input/Output Voltage Range: 0 V to VDD
• Maximum Output Current: 25 mA per I/O pin
• Standby Current Consumption: 10 µA
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: 100 kHz, 400 kHz, or 1 MHz

Pin Configuration

The PCA8574TS,112 has a total of 16 pins arranged in a TSSOP package. The pin configuration is as follows:

```

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| | | 1 16 | | | | 2 15 | | | | 3 14 | | | | 4 13 | | | | 5 12 | | | | 6 11 | | | | 7 10 | | | | 8 9 | |_______________| ```

Functional Features

• 8-bit remote I/O expander for I2C-bus
• Bidirectional I/O ports
• Internal power-on reset
• Noise filter on SDA/SCL inputs
• Interrupt output with programmable polarity
• Address by three hardware address pins (A0, A1, A2)
• Active LOW interrupt output

Advantages and Disadvantages

Advantages: - Low standby current consumption - Wide operating voltage range - Compatibility with most microcontrollers - Simple I2C-bus interface - Expandable to multiple devices on the same bus

Disadvantages: - Limited number of I/O pins (8 in total) - Requires additional components for I2C communication

Working Principles

The PCA8574TS,112 operates as an I/O expander by utilizing the I2C-bus protocol. It communicates with a microcontroller through the I2C bus, allowing the microcontroller to control the input/output signals of external devices connected to the PCA8574TS,112.

The device has eight bidirectional I/O ports that can be individually configured as inputs or outputs. The microcontroller sends commands and data to the PCA8574TS,112 via the I2C bus, specifying the desired state of each I/O pin. The PCA8574TS,112 then sets the corresponding pins accordingly.

Detailed Application Field Plans

The PCA8574TS,112 finds applications in various fields where there is a need for expanding the number of I/O pins available on a microcontroller. Some potential application areas include:

1. Home automation systems: Controlling and monitoring multiple sensors, actuators, and devices.
2. Industrial automation: Expanding the I/O capabilities of PLCs (Programmable Logic Controllers) for controlling machinery and equipment.
3. Internet of Things (IoT): Enabling communication between microcontrollers and multiple IoT devices.
4. Robotics: Controlling various motors, sensors, and peripherals in robotic systems.
5. Automotive electronics: Extending the I/O capabilities of automotive control units.

Detailed and Complete Alternative Models

1. PCA8574APW,112
2. PCA9674PW,118
3. MCP23008-E/SO
4. MAX7313ATG+
5. PCF8574T/3,518

These alternative models offer similar functionality to the PCA8574TS,112 and can be used as replacements depending on specific requirements and availability.

In conclusion, the PCA8574TS,112 is a versatile I/O expander IC that provides additional input/output capabilities to microcontrollers. With its low power consumption, wide operating voltage range, and compatibility with most microcontrollers, it is widely used in various applications ranging from home automation to industrial automation and IoT