PCAL9555APW,118

Product Overview

Category

PCAL9555APW,118 belongs to the category of integrated circuits (ICs).

Use

It is commonly used as an I/O expander for microcontrollers or other digital systems.

Characteristics

• 16-bit I/O expander with interrupt output
• Low standby current consumption
• Wide operating voltage range
• High-speed I2C-bus interface
• Schmitt-trigger action on all inputs
• Open-drain interrupt output
• ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

Package

The PCAL9555APW,118 is available in a TSSOP package.

Essence

The essence of PCAL9555APW,118 lies in its ability to expand the number of I/O pins available for a microcontroller or digital system.

Packaging/Quantity

The PCAL9555APW,118 is typically sold in reels, with 2500 units per reel.

Specifications

• Supply Voltage: 1.65 V to 5.5 V
• Operating Temperature Range: -40°C to +85°C
• Number of I/O Pins: 16
• I2C-bus Frequency: Up to 400 kHz
• Interrupt Output: Open-drain

Detailed Pin Configuration

The PCAL9555APW,118 has a total of 20 pins. The pin configuration is as follows:

1. SDA (Serial Data)
2. SCL (Serial Clock)
3. A0 (Address Bit 0)
4. A1 (Address Bit 1)
5. A2 (Address Bit 2)
6. INT (Interrupt Output)
7. P0 (I/O Port 0)
8. P1 (I/O Port 1)
9. P2 (I/O Port 2)
10. P3 (I/O Port 3)
11. P4 (I/O Port 4)
12. P5 (I/O Port 5)
13. P6 (I/O Port 6)
14. P7 (I/O Port 7)
15. P10 (I/O Port 10)
16. P11 (I/O Port 11)
17. VDD (Supply Voltage)
18. GND (Ground)
19. RESET (Reset Input)
20. NC (No Connection)

Functional Features

• I2C-bus interface for easy communication with microcontrollers
• Interrupt output for efficient event handling
• Schmitt-trigger action on all inputs for noise immunity
• ESD protection for enhanced reliability

Advantages and Disadvantages

Advantages

• Allows expansion of I/O pins without using additional microcontroller pins
• Low standby current consumption helps conserve power
• Wide operating voltage range provides flexibility in different applications
• High-speed I2C-bus interface enables fast data transfer

Disadvantages

• Limited to 16 I/O pins, may not be suitable for applications requiring a larger number of I/Os
• Requires knowledge of I2C-bus protocol for proper integration

Working Principles

The PCAL9555APW,118 works by communicating with a microcontroller or digital system through the I2C-bus interface. It receives commands and data from the microcontroller and controls the I/O pins accordingly. The interrupt output can be used to notify the microcontroller of specific events or changes in the I/O status.

Detailed Application Field Plans

The PCAL9555APW,118 finds applications in various fields, including but not limited to: - Industrial automation - Home automation - Consumer electronics - Automotive systems - Internet of Things (IoT) devices

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to PCAL9555APW,118 are: - MCP23017 - PCA9535 - MAX7313

These models can be considered as alternatives based on specific requirements and compatibility with the target system.

In conclusion, the PCAL9555APW,118 is a versatile 16-bit I/O expander IC that offers a range of features and advantages for expanding the I/O capabilities of microcontrollers or digital systems. Its wide application field plans and availability of alternative models make it a popular choice in various industries.