PCA9521D,118

Product Overview

• Category: Integrated Circuit
• Use: I2C-bus repeater/hub
• Characteristics: High-speed, low-power, 8-channel I2C-bus hub/repeater with reset and interrupt
• Package: SO16 (Small Outline Package)
• Essence: The PCA9521D,118 is a versatile integrated circuit that acts as an I2C-bus repeater/hub. It allows multiple devices to be connected to a single I2C-bus, extending the bus length and increasing the number of devices that can be controlled.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Operating voltage: 2.3V to 5.5V
• Maximum frequency: 400 kHz
• Number of channels: 8
• Reset input with power-on reset
• Interrupt output for bus activity monitoring
• Low standby current consumption: 1 μA (typical)

Detailed Pin Configuration

The PCA9521D,118 has a total of 16 pins arranged in a Small Outline Package (SO16). The pin configuration is as follows:

Pin 1: SDA1 Pin 2: SCL1 Pin 3: GND Pin 4: VCC Pin 5: RESET Pin 6: INT Pin 7: SDA2 Pin 8: SCL2 Pin 9: SDA3 Pin 10: SCL3 Pin 11: SDA4 Pin 12: SCL4 Pin 13: SDA5 Pin 14: SCL5 Pin 15: SDA6 Pin 16: SCL6

Functional Features

• Acts as a repeater/hub for I2C-bus signals
• Extends the bus length and increases the number of devices that can be connected
• Supports high-speed communication up to 400 kHz
• Provides reset input for power-on reset functionality
• Offers interrupt output for monitoring bus activity
• Low standby current consumption ensures energy efficiency

Advantages and Disadvantages

Advantages

• Enables easy expansion of I2C-bus networks
• Allows longer bus lengths without signal degradation
• Provides flexibility in connecting multiple devices
• Supports high-speed communication
• Power-on reset feature ensures reliable operation

Disadvantages

• Limited to 8 channels, may not be suitable for larger networks
• Requires additional components for proper operation

Working Principles

The PCA9521D,118 acts as an I2C-bus repeater/hub by receiving and retransmitting I2C-bus signals. It amplifies and regenerates the signals, allowing them to travel longer distances without degradation. The device also provides a reset input for power-on reset functionality and an interrupt output for monitoring bus activity.

Detailed Application Field Plans

The PCA9521D,118 finds applications in various fields where multiple devices need to be connected to a single I2C-bus. Some potential application areas include:

1. Industrial automation systems
2. Home automation and smart home devices
3. Automotive electronics
4. Consumer electronics
5. Medical equipment
6. Internet of Things (IoT) devices

Detailed and Complete Alternative Models

1. PCA9511A,112: 2-channel I2C-bus hub/repeater with level shifting and interrupt
2. PCA9515A,112: 5-channel I2C-bus hub/repeater with level shifting and interrupt
3. PCA9517A,112: 8-channel I2C-bus hub/repeater with level shifting and interrupt
4. PCA9518A,112: 1-channel I2C-bus hub/repeater with level shifting and interrupt

These alternative models offer similar functionality to the PCA9521D,118 but may have different channel configurations or additional features.

In conclusion, the PCA9521D,118 is a versatile integrated circuit that serves as an I2C-bus repeater/hub. It allows for the expansion of I2C-bus networks, supports high-speed communication, and provides essential features like reset and interrupt. While it has limitations in terms of channel count, it finds applications in various fields and has alternative models with different specifications.