PCAL9539AHF,128

Product Overview

• Category: Integrated Circuit (IC)
• Use: GPIO Expander
• Characteristics: High-speed I2C-bus/SMBus I/O expander with interrupt and reset
• Package: 24-pin HVQFN package
• Essence: The PCAL9539AHF,128 is a versatile GPIO expander IC that provides additional input/output pins for microcontrollers or other devices.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage: 1.65V to 5.5V
• Number of I/O Pins: 16
• I/O Voltage Level: 1.8V to 5.5V
• Interface: I2C-bus/SMBus compatible
• Interrupt Output: Open-drain output
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCAL9539AHF,128 has a total of 24 pins. The pin configuration is as follows:

1. SDA: Serial Data Input/Output
2. SCL: Serial Clock Input
3. RESET: Active-Low Reset Input
4. INT: Interrupt Output 5-20. P0-P15: General Purpose I/O Pins
5. VDD: Supply Voltage
6. GND: Ground
7. NC: No Connection
8. NC: No Connection

Functional Features

• Provides 16 general-purpose I/O pins
• Supports both input and output modes for each pin
• Configurable interrupt output for efficient event handling
• Low standby current consumption for power-sensitive applications
• Supports hot insertion and removal without bus contention
• Internal pull-up resistors for each I/O pin

Advantages and Disadvantages

Advantages

• Compact and space-saving package
• Wide operating voltage range
• High-speed I2C-bus/SMBus interface
• Configurable interrupt output for efficient event handling

Disadvantages

• Limited number of I/O pins (16)
• No built-in protection features against overvoltage or ESD events

Working Principles

The PCAL9539AHF,128 operates as an I2C-bus/SMBus slave device. It communicates with a microcontroller or host device through the serial data (SDA) and serial clock (SCL) lines. The device can be configured to operate in input or output mode for each individual I/O pin. It also supports interrupt functionality, allowing the host device to be notified when specific events occur on the I/O pins.

Detailed Application Field Plans

The PCAL9539AHF,128 can be used in various applications that require additional GPIO pins. Some potential application fields include:

1. Industrial automation systems
2. Consumer electronics
3. Internet of Things (IoT) devices
4. Robotics
5. Automotive electronics

Detailed and Complete Alternative Models

1. PCAL9539APW,118: Similar GPIO expander IC with 20-pin TSSOP package.
2. PCA9539PW,112: GPIO expander IC with 16 I/O pins and 20-pin TSSOP package.
3. MCP23017-E/SP: I2C-bus I/O expander with 16 I/O pins and 28-pin DIP package.

These alternative models offer similar functionality and can be considered as alternatives to the PCAL9539AHF,128 based on specific requirements and constraints.

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