PCA9517D,118

Product Overview

Category: Integrated Circuit (IC)

Use: Level shifting and translating between different voltage levels in I2C bus applications.

Characteristics: - Bidirectional voltage level translation - Supports I2C Fast Mode Plus (Fm+) with speeds up to 1 MHz - Compatible with both 3.3V and 5V systems - Low standby current consumption - ESD protection exceeding 2000V HBM per JESD22-A114 and 1000V CDM per JESD22-C101

Package: SOIC (Small Outline Integrated Circuit)

Essence: The PCA9517D,118 is a level shifter IC designed specifically for I2C bus applications, allowing communication between devices operating at different voltage levels.

Packaging/Quantity: The PCA9517D,118 is available in a standard SOIC package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Data Rate: 1 MHz
• Number of Channels: 2
• Input/Output Logic Compatibility: 3.3V and 5V

Pin Configuration

The PCA9517D,118 has a total of 8 pins arranged as follows:

```

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| | --| VCC1 GND|-- Pin 1: Ground (GND) --| SDA1 SCL|-- Pin 2: I2C Bus 1 (SDA1/SCL) --| OE EN |-- Pin 3: Output Enable (OE) / Enable (EN) --| SDA2 SCL|-- Pin 4: I2C Bus 2 (SDA2/SCL) --| A0 A1 |-- Pins 5 and 6: Address Select (A0, A1) --| VCC2 VREF|-- Pin 7: Reference Voltage (VREF) --| | |___________| ```

Functional Features

• Bidirectional voltage level translation between two I2C buses operating at different voltage levels.
• Automatic direction sensing and control of the data and clock lines.
• Supports I2C Fast Mode Plus (Fm+) with speeds up to 1 MHz.
• Provides ESD protection exceeding industry standards.

Advantages and Disadvantages

Advantages: - Enables communication between devices operating at different voltage levels. - Supports high-speed data transfer in I2C bus applications. - Low standby current consumption helps conserve power. - Offers built-in ESD protection for enhanced reliability.

Disadvantages: - Limited to level shifting and translating within the I2C bus protocol. - Not suitable for applications requiring voltage translation beyond the specified range.

Working Principles

The PCA9517D,118 utilizes a bidirectional voltage level shifting technique to enable communication between two I2C buses operating at different voltage levels. It automatically senses the direction of data flow and adjusts the voltage levels accordingly. The device ensures compatibility between 3.3V and 5V systems while maintaining signal integrity and minimizing power consumption.

Detailed Application Field Plans

The PCA9517D,118 is commonly used in various applications where voltage level translation is required in I2C bus communication. Some typical application fields include:

1. Embedded Systems: Facilitating communication between microcontrollers and peripheral devices operating at different voltage levels.
2. Industrial Automation: Enabling interoperability between sensors, actuators, and control units with varying voltage requirements.
3. Consumer Electronics: Supporting communication between different modules or subsystems within electronic devices.
4. Automotive Electronics: Facilitating data exchange between various automotive components operating at different voltage levels.

Detailed and Complete Alternative Models

1. PCA9306: Similar bidirectional I2C bus voltage level translator with automatic direction sensing.
2. TXB0108: Eight-channel bidirectional voltage-level translator with configurable voltage levels.
3. BSS138: General-purpose N-channel MOSFET used for level shifting applications.
4. SN74LVC4245A: Octal bus transceiver with configurable voltage translation capabilities.

These alternative models offer similar functionality to the PCA9517D,118 and can be considered as alternatives based on specific application requirements.

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