PCA9534DWR

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9534DWR 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 LED dimming. It provides 16 open-drain, low-voltage outputs that can be used to directly drive LEDs or other loads.

Characteristics: - 16-bit I/O expander - I2C-bus and SMBus compatible - Low standby current consumption - Wide supply voltage range: 2.3V to 5.5V - Internal power-on reset - Noise filter on SCL/SDA inputs - Output state change programmable on the Acknowledge or Stop command - Active LOW interrupt output - ESD protection exceeds 2000V HBM per JESD22-A114, 200V MM per JESD22-A115, and 1000V CDM per JESD22-C101

Package: SOIC (Small Outline Integrated Circuit) package

Essence: The PCA9534DWR is an essential component for controlling and dimming LEDs in various electronic devices. Its versatility and compatibility with I2C-bus and SMBus make it a popular choice among designers.

Packaging/Quantity: The PCA9534DWR is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Input Voltage Range: GND to VDD
• Output Voltage Range: GND to VDD
• Maximum Output Current: 25mA per channel
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-24

Pin Configuration

The PCA9534DWR has a total of 24 pins. The pin configuration is as follows:

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| | | 1 24 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |_______________| ```

Functional Features

• 16 open-drain, low-voltage outputs
• Individual output configuration (input or output)
• Programmable output polarity inversion
• Output state change programmable on Acknowledge or Stop command
• Active LOW interrupt output for each I/O pin
• Internal power-on reset
• Noise filter on SCL/SDA inputs

Advantages and Disadvantages

Advantages: - Versatile and compatible with I2C-bus and SMBus - Low standby current consumption - Wide supply voltage range - ESD protection exceeds industry standards

Disadvantages: - Limited to 16-bit I/O expansion

Working Principles

The PCA9534DWR operates by receiving commands through the I2C-bus or SMBus interface. It can be programmed to control the state of each individual output pin, allowing for dimming or switching of LEDs or other loads. The device also features an active LOW interrupt output that can be used to trigger events based on changes in the input or output states.

Detailed Application Field Plans

The PCA9534DWR finds applications in various fields where LED dimming or control is required. Some common application areas include: - Backlight control in LCD displays - Keypad illumination in electronic devices - General-purpose LED dimming in automotive applications - Industrial control systems requiring multiple LED outputs

Detailed and Complete Alternative Models

1. PCA9534PW: 16-bit I2C-bus and SMBus I/O expander, TSSOP package
2. PCA9534BS: 16-bit I2C-bus and SMBus I/O expander, HVQFN package
3. PCA9534DB: 16-bit I2C-bus and SMBus I/O expander, SSOP package
4. PCA9534RGYR: 16-bit I2C-bus and SMBus I/O expander, VQFN package

These alternative models offer similar functionality to the PCA9534DWR but may differ in package type or pin configuration.

In conclusion, the PCA9534DWR is a versatile and widely used I/O expander specifically designed for LED dimming applications. Its compatibility with I2C-bus and SMBus, along with its low standby current consumption and wide supply voltage range, make it an ideal choice for various electronic