PCA9541PW/01,118

Product Overview

Category: Integrated Circuits (ICs)

Use: The PCA9541PW/01,118 is a multiplexer/demultiplexer IC that allows multiple devices to share a single communication bus. It provides a simple solution for expanding the number of I2C or SMBus ports available in a system.

Characteristics: - Low voltage operation (1.65V to 5.5V) - 2-wire I2C-bus/SMBus interface compatibility - Four bidirectional channels - Individual enable control for each channel - High-speed I2C-bus/SMBus compatible (up to 400 kHz) - Low standby current consumption (<1µA) - ESD protection exceeds 2000V HBM per JESD22-A114 and 1000V CDM per JESD22-C101

Package: TSSOP-16

Essence: The PCA9541PW/01,118 is designed to simplify the management of multiple I2C or SMBus devices by allowing them to share a common bus. It enables efficient communication between a microcontroller and various peripheral devices, reducing the complexity of the system design.

Packaging/Quantity: The PCA9541PW/01,118 is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Number of Channels: 4
• Communication Interface: I2C-bus/SMBus
• Maximum Clock Frequency: 400 kHz
• Standby Current: <1µA
• Package Type: TSSOP-16

Pin Configuration

The PCA9541PW/01,118 has a TSSOP-16 package with the following pin configuration:

1 NC 2 SCL 3 SDA 4 EN0 5 EN1 6 EN2 7 EN3 8 GND 9 NC 10 NC 11 NC 12 NC 13 NC 14 NC 15 VCC 16 NC

Functional Features

The PCA9541PW/01,118 offers the following functional features:

• Multiplexes or demultiplexes I2C-bus/SMBus channels
• Individual enable control for each channel
• Bidirectional data transfer between selected channel and I2C-bus/SMBus
• Low standby current consumption for power efficiency
• ESD protection for enhanced reliability

Advantages and Disadvantages

Advantages: - Simplifies I2C or SMBus communication in systems with multiple devices - Enables efficient use of limited I2C or SMBus ports - Low voltage operation allows compatibility with a wide range of systems - High-speed communication up to 400 kHz - Provides individual enable control for each channel

Disadvantages: - Limited to four channels, may not be suitable for systems requiring more than four devices

Working Principles

The PCA9541PW/01,118 operates by selectively connecting one of the four bidirectional channels to the I2C-bus/SMBus. The channel selection is controlled through the enable pins (EN0-EN3). When a specific channel is enabled, data can be transferred between that channel and the I2C-bus/SMBus.

The IC supports high-speed communication up to 400 kHz and operates at low voltages, making it compatible with a wide range of systems. It also features low standby current consumption, ensuring power efficiency when not in use.

Detailed Application Field Plans

The PCA9541PW/01,118 finds applications in various fields where multiple I2C or SMBus devices need to be connected to a single bus. Some potential application areas include:

1. Industrial Automation: Controlling multiple sensors, actuators, and modules through a common I2C/SMBus interface.
2. Consumer Electronics: Managing communication between different peripheral devices in audio/video systems, gaming consoles, etc.
3. Automotive Systems: Enabling efficient communication between various automotive control units connected via I2C/SMBus.
4. Internet of Things (IoT): Facilitating connectivity between multiple IoT devices using a shared I2C/SMBus bus.

Alternative Models

Here are some alternative models that offer similar functionality to the PCA9541PW/01,118:

1. PCA9540B: 2-channel I2C-bus multiplexer/demultiplexer
2. PCA9543A: 2-channel I