PCA9518PW,118

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Level shifting and translating between different voltage levels in I2C bus systems
• Characteristics:
  • Bidirectional voltage-level translation
  • Compatible with I2C Fast Mode (400 kHz) and Standard Mode (100 kHz)
  • Supports 2.3 V to 5.5 V on the low side and 1.65 V to 5.5 V on the high side
  • Provides buffering for both the SDA and SCL lines
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The PCA9518PW,118 is a level shifter IC specifically designed for I2C bus systems, allowing communication between devices operating at different voltage levels.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 1.65 V to 5.5 V
• Operating Temperature Range: -40°C to +85°C
• Maximum Data Rate: 400 kHz
• Input Capacitance: 10 pF
• Output Capacitance: 10 pF
• Rise Time: 20 ns
• Fall Time: 20 ns
• Quiescent Current: 2 µA (typical)

Detailed Pin Configuration

The PCA9518PW,118 has a total of 16 pins arranged as follows:

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| | | 1 2 3 | | | | 4 5 6 | | | | 7 8 9 | | | | 10 11 12 | | | | 13 14 15 | |_______________| ```

Pin descriptions: 1. VREF1: Reference voltage for low-level side 2. SDA1: Serial Data Line for low-level side 3. SCL1: Serial Clock Line for low-level side 4. GND1: Ground for low-level side 5. OE: Output Enable 6. A0: Address Input Bit 0 7. A1: Address Input Bit 1 8. A2: Address Input Bit 2 9. GND2: Ground for high-level side 10. SDA2: Serial Data Line for high-level side 11. SCL2: Serial Clock Line for high-level side 12. VREF2: Reference voltage for high-level side 13-16. NC: No Connection

Functional Features

• Bidirectional voltage-level translation between I2C buses operating at different voltage levels
• Automatic direction sensing and control of the I2C bus signals
• Provides buffering to prevent excessive loading of the I2C bus lines
• Supports both I2C Fast Mode (400 kHz) and Standard Mode (100 kHz)
• Enables communication between devices with voltage level differences ranging from 2.3 V to 5.5 V on the low side and 1.65 V to 5.5 V on the high side

Advantages and Disadvantages

Advantages: - Simplifies interfacing between I2C devices operating at different voltage levels - Supports high-speed data transfer up to 400 kHz - Low quiescent current consumption - Small package size allows for space-efficient designs

Disadvantages: - Limited to voltage translation within the specified range - Requires careful consideration of input/output capacitance for optimal performance

Working Principles

The PCA9518PW,118 utilizes a bidirectional voltage-level shifting technique to enable communication between I2C devices operating at different voltage levels. It automatically senses the direction of data flow and adjusts the voltage levels accordingly. The IC provides buffering to prevent excessive loading of the I2C bus lines, ensuring reliable data transmission.

Detailed Application Field Plans

The PCA9518PW,118 is commonly used in various applications where level shifting between I2C devices with different voltage requirements is necessary. Some typical application fields include: - Consumer electronics - Industrial automation - Automotive systems - Medical devices - Communication equipment

Detailed and Complete Alternative Models

• PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator
• TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing

These alternative models offer similar functionality and can be considered as alternatives to the PCA9518PW,118 depending on specific requirements and constraints.

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