PCA9543CPW,118

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Multiplexer and demultiplexer for I2C-bus applications
• Characteristics:
  • Low voltage level shifting between I2C-bus and SMBus
  • Compatible with I2C-bus standard mode, fast mode, and fast mode plus
  • Supports hot insertion
  • Low standby current consumption
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: PCA9543CPW,118 is a multiplexer/demultiplexer IC designed for I2C-bus applications.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: Up to 400 kHz
• Number of Channels: 4
• Channel ON Resistance: 7 Ω (typical)

Detailed Pin Configuration

1. SDA: Serial Data Input/Output
2. SCL: Serial Clock Input
3. EN: Enable Input
4. A0: Address Input Bit 0
5. A1: Address Input Bit 1
6. GND: Ground
7. Y0: Channel 0 Output
8. Y1: Channel 1 Output
9. Y2: Channel 2 Output
10. Y3: Channel 3 Output
11. VCC: Supply Voltage

Functional Features

• The PCA9543CPW,118 acts as a bidirectional switch, allowing multiple I2C-bus or SMBus devices to be connected to a single bus.
• It enables the system master to isolate segments of the I2C-bus, allowing communication with selected devices.
• The device supports hot insertion, allowing new I2C-bus devices to be added or removed without disrupting the bus operation.

Advantages and Disadvantages

Advantages

• Enables efficient use of I2C-bus resources by multiplexing multiple devices onto a single bus.
• Supports different I2C-bus speeds, providing flexibility in system design.
• Low standby current consumption helps conserve power in battery-powered applications.

Disadvantages

• Limited to 4 channels, which may not be sufficient for complex systems requiring more connections.
• Requires careful consideration of addressing to avoid conflicts when multiple PCA9543CPW,118 devices are used in the same system.

Working Principles

The PCA9543CPW,118 operates by selectively connecting one of the four input channels (Y0-Y3) to the output channel (SDA/SCL). This is controlled by the enable input (EN) and the address inputs (A0 and A1). When a specific channel is selected, the corresponding input signals are passed through to the output, allowing communication with the desired device on that channel.

Detailed Application Field Plans

The PCA9543CPW,118 finds applications in various scenarios where multiple I2C-bus devices need to be connected to a single bus. Some common application fields include: - Industrial automation systems - Consumer electronics - Automotive electronics - Medical devices - Telecommunications equipment

Detailed and Complete Alternative Models

• PCA9544APW,118: Similar to PCA9543CPW,118 but with 4 additional channels (8 channels in total).
• PCA9545APW,118: Similar to PCA9543CPW,118 but with 8 additional channels (12 channels in total).
• TCA9543APW,118: Similar functionality to PCA9543CPW,118 but with different pin configuration and package.

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