PCA9539PWRG4

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9539PWRG4 is a 16-bit I2C-bus and SMBus I/O expander designed for LED dimming control in various applications. It provides a simple solution for expanding the number of I/O ports available on a microcontroller.

Characteristics: - 16 programmable GPIO pins - I2C-bus and SMBus compatible interface - Low standby current consumption - Wide operating voltage range: 2.3V to 5.5V - High noise immunity - Schmitt-trigger action on all inputs

Package: TSSOP-24

Essence: The PCA9539PWRG4 is an essential component for controlling LED dimming in electronic devices. It allows for efficient management of multiple LEDs using a minimal number of microcontroller pins.

Packaging/Quantity: The PCA9539PWRG4 is typically sold in reels, with 2500 units per reel.

Specifications

• Operating Voltage Range: 2.3V to 5.5V
• Supply Current: 1.6mA (typical)
• Number of GPIO Pins: 16
• I2C-bus/SMBus Compatibility: Yes
• Maximum Clock Frequency: 400kHz
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The PCA9539PWRG4 has a TSSOP-24 package with the following pin configuration:

___________ | | NC |1 24| VDD SDA |2 23| SCL SDA |3 22| INT SDA |4 21| A2 SDA |5 20| A1 SDA |6 19| A0 SDA |7 18| RESET SDA |8 17| P7 SDA |9 16| P6 SDA |10 15| P5 SDA |11 14| P4 SDA |12 13| P3 |___________|

Functional Features

• Programmable I/O pins allow for flexible LED dimming control.
• I2C-bus and SMBus compatibility ensures easy integration with microcontrollers.
• Schmitt-trigger action on all inputs provides high noise immunity.
• Low standby current consumption minimizes power usage.

Advantages and Disadvantages

Advantages: - Efficient LED dimming control with minimal microcontroller pins. - Wide operating voltage range allows for versatile applications. - High noise immunity ensures reliable performance in noisy environments. - Low standby current consumption reduces power consumption.

Disadvantages: - Limited to 16 GPIO pins, may not be suitable for applications requiring a larger number of I/O ports. - Requires I2C-bus or SMBus interface support from the microcontroller.

Working Principles

The PCA9539PWRG4 operates by receiving commands through the I2C-bus or SMBus interface from a microcontroller. These commands determine the desired state of each GPIO pin, allowing for individual LED dimming control. The device utilizes internal registers to store the configuration and status of each pin, enabling efficient communication between the microcontroller and the PCA9539PWRG4.

Detailed Application Field Plans

The PCA9539PWRG4 finds application in various fields where LED dimming control is required. Some potential application areas include:

1. Automotive Lighting Systems: The PCA9539PWRG4 can be used to control the brightness of LEDs in automotive lighting systems, such as headlights, taillights, and interior lighting.

2. Display Panels: LED dimming control is crucial in display panels to adjust the brightness levels for optimal viewing experience. The PCA9539PWRG4 can be integrated into display panels to achieve this functionality.

3. Industrial Automation: LED indicators are commonly used in industrial automation systems. The PCA9539PWRG4 enables precise control over the brightness of these indicators, enhancing visibility and signaling capabilities.

4. Consumer Electronics: From televisions to smart home devices, LED dimming control plays a significant role in consumer electronics. The PCA9539PWRG4 can be utilized in various consumer electronic products to provide efficient LED dimming functionality.

Detailed and Complete Alternative Models

1. PCA9555PW: This 16-bit I/O expander offers similar features to the PCA9539PWRG4, including I2C-bus compatibility and programmable GPIO pins. However, it operates at a wider voltage range of 2.7V to 5.5V.

2. MCP