PCAL6416AHF,128

Product Overview

• Category: Integrated Circuit
• Use: GPIO Expander
• Characteristics: High-performance, low-power, 16-bit I/O expander
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Expand the number of general-purpose input/output pins in a microcontroller or microprocessor-based system
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Number of I/O Pins: 16
• Supply Voltage Range: 1.65V to 5.5V
• Input/Output Voltage Range: 0V to VDD
• Maximum Output Current: ±10mA
• Operating Temperature Range: -40°C to +85°C
• Interface: I2C (Inter-Integrated Circuit)

Detailed Pin Configuration

The PCAL6416AHF,128 has a total of 24 pins. The pin configuration is as follows:

1. SDA (Serial Data Line)
2. SCL (Serial Clock Line)
3. INT (Interrupt Output)
4. RESET (Reset Input)
5. P00 (General Purpose I/O Pin 0)
6. P01 (General Purpose I/O Pin 1)
7. P02 (General Purpose I/O Pin 2)
8. P03 (General Purpose I/O Pin 3)
9. P04 (General Purpose I/O Pin 4)
10. P05 (General Purpose I/O Pin 5)
11. P06 (General Purpose I/O Pin 6)
12. P07 (General Purpose I/O Pin 7)
13. P10 (General Purpose I/O Pin 8)
14. P11 (General Purpose I/O Pin 9)
15. P12 (General Purpose I/O Pin 10)
16. P13 (General Purpose I/O Pin 11)
17. P14 (General Purpose I/O Pin 12)
18. P15 (General Purpose I/O Pin 13)
19. P16 (General Purpose I/O Pin 14)
20. P17 (General Purpose I/O Pin 15)
21. VDD (Supply Voltage)
22. GND (Ground)
23. A0 (Address Input Bit 0)
24. A1 (Address Input Bit 1)

Functional Features

• High-speed I2C interface for communication with the microcontroller
• Configurable input/output pins with programmable pull-up/pull-down resistors
• Interrupt output pin for efficient event-driven applications
• Reset input pin for system initialization
• Low standby current consumption for power-sensitive applications
• Address selection pins for multiple device operation on the same bus

Advantages and Disadvantages

Advantages: - Allows expansion of I/O pins without using additional microcontroller pins - Flexible configuration options for each I/O pin - Low power consumption - Wide operating voltage range - Small package size for space-constrained designs

Disadvantages: - Limited number of I/O pins (16 in this case) - Requires I2C interface support from the microcontroller

Working Principles

The PCAL6416AHF,128 is an I/O expander that communicates with a microcontroller or microprocessor through the I2C interface. It provides additional general-purpose input/output pins, which can be configured as either inputs or outputs. The device supports programmable pull-up/pull-down resistors for each I/O pin, allowing flexibility in interfacing with different types of devices.

The I2C interface enables bi-directional communication between the microcontroller and the PCAL6416AHF,128. The microcontroller sends commands to configure the I/O pins and read their states. The PCAL6416AHF,128 can also generate interrupts to notify the microcontroller of specific events, reducing the need for continuous polling.

Detailed Application Field Plans

The PCAL6416AHF,128 is widely used in various applications that require additional I/O pins beyond what the microcontroller or microprocessor can provide. Some common application fields include:

1. Industrial Automation: Control and monitoring systems often require a large number of I/O pins to interface with sensors, actuators, and other devices.
2. Consumer Electronics: Devices such as smart home controllers, gaming consoles, and audio/video equipment can benefit from extra I/O pins for user interface and peripheral connectivity.
3. Automotive: In-vehicle systems utilize GPIO expanders to interface with various components like switches, sensors, and displays.
4. Internet of Things (IoT): IoT devices often have limited I/O capabilities due to size and power constraints. GPIO expanders enable them to connect to multiple sensors and actuators.

Detailed and Complete Alternative Models

1. MCP23017: 16-bit I/O expander with I2C interface, similar features to PCAL6416AHF