PCA9535PWRG4

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9535PWRG4 is a 16-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in applications such as backlight control, keypad illumination, and general-purpose input/output expansion. It provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset for the I2C-bus/SMBus protocol.

Characteristics: - 16-bit GPIO expansion - I2C-bus and SMBus compatible - Low standby current consumption - Internal power-on reset - Noise filter on SCL/SDA inputs - Polarity inversion register - Open-drain active-low interrupt output - 400 kHz Fast-mode I2C-bus - ESD protection exceeds JESD 22

Package: TSSOP (Thin Shrink Small Outline Package)

Essence: The PCA9535PWRG4 is an integrated circuit that allows for easy expansion of GPIO pins using the I2C-bus or SMBus protocol. It is specifically designed for LED dimming applications but can also be used for general-purpose input/output expansion.

Packaging/Quantity: The PCA9535PWRG4 is available in a TSSOP package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Input/Output Voltage Range: 0V to VDD
• Operating Temperature Range: -40°C to +85°C
• Standby Current Consumption: 1 μA (typical)
• Maximum Output Current: 25 mA per channel
• Maximum Sink Current: 25 mA per channel
• Maximum Frequency: 400 kHz

Pin Configuration

The PCA9535PWRG4 has a total of 20 pins. The pin configuration is as follows:

+---------------------+ | | | U1 | | | +---+-------------+---+ | | SDA|1 20|VDD SCL|2 19|INT A0-3|3-6 18|P7 P0-3|7-10 17|P6 P4-7|11-14 16|P5 GND |15 15|P4 +-------------+

Functional Features

• 16-bit GPIO expansion allows for easy control and monitoring of multiple devices.
• I2C-bus and SMBus compatibility ensures easy integration into existing systems.
• Low standby current consumption minimizes power usage when not in use.
• Internal power-on reset ensures reliable operation upon power-up.
• Noise filter on SCL/SDA inputs improves signal integrity.
• Polarity inversion register allows for flexible signal polarity configuration.
• Open-drain active-low interrupt output provides a convenient way to detect events.
• Fast-mode I2C-bus support enables high-speed communication.
• ESD protection exceeds industry standards, ensuring robustness against electrostatic discharge.

Advantages and Disadvantages

Advantages: - Easy expansion of GPIO pins using the I2C-bus or SMBus protocol. - Optimized for LED dimming applications. - Low standby current consumption for energy efficiency. - Flexible signal polarity configuration. - Robust ESD protection.

Disadvantages: - Limited to 16 bits of GPIO expansion. - Requires knowledge of I2C-bus or SMBus protocol for proper usage.

Working Principles

The PCA9535PWRG4 works by receiving commands and data through the I2C-bus or SMBus protocol. It can be controlled by a master device, such as a microcontroller, which sends commands to set the state of each GPIO pin. The device can also generate interrupts to notify the master device of specific events.

Detailed Application Field Plans

The PCA9535PWRG4 can be used in various applications, including: 1. Backlight control in LCD displays 2. Keypad illumination in electronic devices 3. General-purpose input/output expansion in embedded systems 4. LED dimming in automotive lighting systems 5. Control and monitoring of peripheral devices in industrial automation

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the PCA9535PWRG4 include: - PCA9555PW: 16-bit I2C-bus and SMBus I/O expander with interrupt output - MCP23017-E/SP: 16-bit I2C/SPI GPIO expander with interrupt output - MAX7313AUG+: 16-bit I2C GPIO expander with interrupt