PCAL6416AEX1Z

Product Overview

• Category: Integrated Circuit (IC)
• Use: GPIO Expander
• Characteristics: High-performance, low-power, 16-bit I2C-bus/SMBus I/O expander
• Package: 24-pin TSSOP package
• Essence: Provides general-purpose input/output expansion for most microcontroller families
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 1.65V to 5.5V
• I/O Voltage: 1.8V to 5.5V
• Maximum Output Current: ±10mA
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: Up to 400kHz
• Interrupt Output: Open-drain output with selectable polarity
• Address Pins: Allows up to 8 devices on the same bus

Detailed Pin Configuration

The PCAL6416AEX1Z has a total of 24 pins. The pin configuration is as follows:

1. INT - Interrupt output pin
2. SDA - Serial data line for I2C communication
3. SCL - Serial clock line for I2C communication
4. A0 - Address bit 0
5. A1 - Address bit 1
6. A2 - Address bit 2
7. GND - Ground
8. P00 - General-purpose I/O pin 0
9. P01 - General-purpose I/O pin 1
10. P02 - General-purpose I/O pin 2
11. P03 - General-purpose I/O pin 3
12. P04 - General-purpose I/O pin 4
13. P05 - General-purpose I/O pin 5
14. P06 - General-purpose I/O pin 6
15. P07 - General-purpose I/O pin 7
16. VDD - Supply voltage
17. P10 - General-purpose I/O pin 8
18. P11 - General-purpose I/O pin 9
19. P12 - General-purpose I/O pin 10
20. P13 - General-purpose I/O pin 11
21. P14 - General-purpose I/O pin 12
22. P15 - General-purpose I/O pin 13
23. P16 - General-purpose I/O pin 14
24. P17 - General-purpose I/O pin 15

Functional Features

• Provides 16 general-purpose input/output pins
• Supports both input and output modes for each pin
• Configurable interrupt output with selectable polarity
• Low standby current consumption
• Compatible with I2C-bus and SMBus protocols
• Allows multiple devices to be connected on the same bus

Advantages and Disadvantages

Advantages

• High-performance GPIO expander
• Wide supply voltage range allows compatibility with various microcontrollers
• Low-power consumption
• Flexible pin configuration options
• Easy integration with I2C-bus/SMBus systems

Disadvantages

• Limited number of I/O pins (16)
• Requires I2C-bus/SMBus interface for communication

Working Principles

The PCAL6416AEX1Z is an I2C-bus/SMBus compatible GPIO expander. It communicates with a microcontroller or host device through the I2C-bus/SMBus interface. The device acts as an intermediary between the microcontroller and external devices, providing additional input/output pins.

By configuring the appropriate registers via the I2C-bus/SMBus, the PCAL6416AEX1Z can be used to read input states or set output states on its GPIO pins. It also supports interrupt functionality, allowing the microcontroller to be notified of specific events.

Detailed Application Field Plans

The PCAL6416AEX1Z finds applications in various fields, including:

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

In these fields, the PCAL6416AEX1Z is used for expanding the number of available I/O pins, enabling connectivity with external sensors, actuators, and other peripheral devices.

Detailed and Complete Alternative Models

• PCAL6416AHF: Similar to PCAL6416AEX1Z but available in a 20-pin QFN package
• PCA9538PW: 8-bit I2C-bus/SMBus I/O expander with lower pin count
• MCP23017-E/SP: 16-bit I2C-bus I/O expander with higher maximum output current

These alternative models offer similar functionality