PCA9654EDTR2G

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: I2C-bus controller
• Characteristics: Low-voltage, low-power, 16-bit I/O expander for the two-line bidirectional bus (I2C) with interrupt and reset
• Package: TSSOP-24
• Essence: The PCA9654EDTR2G is a versatile IC that provides easy control of multiple input/output (I/O) pins through the I2C-bus interface.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• I2C-bus Operating Frequency: Up to 400 kHz
• Number of I/O Pins: 16
• Interrupt Output: Active-low open-drain output
• Reset Input: Active-low input for device reset
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA9654EDTR2G has a total of 24 pins, which are arranged as follows:

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| | | 1 2 3 4 5 6 7 8 9 | |_______________________________________| | | | 10 11 12 13 14 15 16 17 18 | |_______________________________________| | | | 19 20 21 22 23 24 | |_______________________________________| ```

Functional Features

• Bidirectional I/O Expander: Allows both input and output functionality on each pin.
• I2C-bus Interface: Provides easy control and communication with other devices on the I2C bus.
• Interrupt Output: Generates an interrupt signal to the microcontroller when a change in input status is detected.
• Reset Input: Allows for device reset, restoring all registers to their default values.

Advantages and Disadvantages

Advantages: - Versatile I/O Expander: Enables easy expansion of I/O capabilities in various applications. - Low Power Consumption: Suitable for battery-powered devices or energy-efficient systems. - Small Package Size: TSSOP-24 package offers space-saving benefits.

Disadvantages: - Limited I/O Pins: With only 16 pins, it may not be suitable for applications requiring a large number of I/Os. - Requires I2C-bus Interface: Integration with existing systems may require additional components or modifications.

Working Principles

The PCA9654EDTR2G operates as an I2C-bus controller, allowing bidirectional communication between a microcontroller and multiple I/O pins. It utilizes the I2C-bus protocol to send and receive data, enabling control over the state (input or output) of each pin. The interrupt output can be used to notify the microcontroller of any changes in the input status, while the reset input allows for device initialization.

Detailed Application Field Plans

The PCA9654EDTR2G finds application in various fields, including but not limited to: 1. Industrial Automation: Control and monitoring of sensors, actuators, and peripheral devices. 2. Home Automation: Integration with smart home systems for controlling lights, appliances, and security devices. 3. Automotive Electronics: Interface for controlling switches, indicators, and other automotive components. 4. Consumer Electronics: Expansion of I/O capabilities in devices such as gaming consoles, audio systems, and remote controls.

Detailed and Complete Alternative Models

1. PCA9535PW: 16-bit I2C-bus and SMBus I/O expander with interrupt output and configuration registers.
2. MCP23017-E/SP: 16-bit I/O expander with I2C interface, interrupt output, and hardware address pins.
3. MAX7313ATG+: 16-bit I/O expander with serial interface, interrupt output, and configurable polarity.

These alternative models offer similar functionality to the PCA9654EDTR2G and can be considered based on specific requirements and availability.

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