PCA9517D

Product Overview

Category: Integrated Circuit (IC)

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

Characteristics: - Bidirectional voltage level translation - Supports I2C Fast Mode Plus (Fm+) with a maximum frequency of 1 MHz - Compatible with both 3.3V and 5V systems - Provides buffering for unidirectional data transfer - Supports hot insertion - Low standby current consumption

Package: SOIC (Small Outline Integrated Circuit)

Essence: The PCA9517D is an IC designed to facilitate communication between devices operating at different voltage levels within an I2C bus system.

Packaging/Quantity: The PCA9517D is typically sold in reels, with each reel containing 2500 units.

Specifications

Supply Voltage Range: 2.3V to 5.5V
Operating Temperature Range: -40°C to +85°C
Maximum Data Rate: 1 MHz
Standby Current: 10 µA (typical)
Rise/Fall Time: 20 ns (maximum)

Pin Configuration

The PCA9517D has a total of 8 pins:

SDA_IN: Input/output pin for the I2C data line.
SCL_IN: Input pin for the I2C clock line.
OE: Output enable pin for controlling the direction of the I2C bus.
VCC: Power supply pin (2.3V to 5.5V).
GND: Ground pin.
SDA_OUT: Output pin for the translated I2C data line.
SCL_OUT: Output pin for the translated I2C clock line.
NC: No connection pin.

Functional Features

Bidirectional voltage level translation between 3.3V and 5V systems.
Automatic direction sensing and control of the I2C bus.
Provides buffering for unidirectional data transfer.
Supports hot insertion, allowing devices to be added or removed without disrupting the bus operation.
Low standby current consumption helps conserve power in battery-powered applications.

Advantages and Disadvantages

Advantages: - Simplifies interfacing between devices operating at different voltage levels. - Supports high-speed data transfer up to 1 MHz. - Compatible with both 3.3V and 5V systems. - Enables hot insertion without bus disruption. - Low standby current consumption.

Disadvantages: - Limited to voltage level translation within the I2C bus system. - Not suitable for applications requiring bidirectional voltage translation beyond the I2C protocol.

Working Principles

The PCA9517D utilizes a bidirectional voltage level shifting technique to enable communication between devices operating at different voltage levels within an I2C bus system. It automatically senses the direction of the I2C bus and controls the voltage translation accordingly. The device provides buffering for unidirectional data transfer, ensuring reliable communication between devices.

Detailed Application Field Plans

The PCA9517D is commonly used in various applications where voltage level translation is required within an I2C bus system. Some specific application fields include:

Consumer Electronics: Facilitating communication between different voltage level ICs in smartphones, tablets, and other portable devices.
Industrial Automation: Enabling interoperability between devices operating at different voltage levels in industrial control systems.
Automotive Electronics: Supporting communication between components with varying voltage requirements in automotive applications.
Internet of Things (IoT): Bridging the gap between devices with different voltage levels in IoT networks.

Detailed and Complete Alternative Models

PCA9306: Similar bidirectional I2C voltage level translator with automatic direction sensing.
TXB0108: Eight-channel bidirectional voltage level translator with configurable voltage levels.
BSS138: Single-channel bidirectional voltage level translator for general-purpose applications.

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

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací PCA9517D v technických řešeních

Sure! Here are 10 common questions and answers related to the application of PCA9517D in technical solutions:

Q: What is PCA9517D? A: PCA9517D is a level-translating I2C-bus repeater that provides bidirectional voltage-level translation between low-voltage (down to 0.9V) and higher-voltage (up to 5.5V) I2C-bus or SMBus applications.
Q: What is the purpose of using PCA9517D in a technical solution? A: PCA9517D is used to enable communication between devices operating at different voltage levels, allowing them to interface seamlessly on the I2C bus.
Q: How many channels does PCA9517D support? A: PCA9517D supports two bidirectional channels, allowing for voltage-level translation between two different I2C buses.
Q: What is the maximum data rate supported by PCA9517D? A: PCA9517D supports a maximum data rate of 400 kHz, making it suitable for high-speed I2C applications.
Q: Can PCA9517D be used as a standalone device? A: Yes, PCA9517D can be used as a standalone device without requiring any external components.
Q: Does PCA9517D require an external power supply? A: Yes, PCA9517D requires an external power supply connected to its VCC pin to operate.
Q: Can PCA9517D handle level shifting for both clock and data lines? A: Yes, PCA9517D performs level shifting for both clock (SCL) and data (SDA) lines of the I2C bus.
Q: What is the voltage range supported by PCA9517D for level translation? A: PCA9517D supports voltage-level translation between 0.9V and 5.5V, making it compatible with a wide range of devices.
Q: Can PCA9517D be used in hot-swapping applications? A: Yes, PCA9517D is designed to support hot-swapping, allowing devices to be added or removed from the I2C bus without disrupting communication.
Q: Are there any special considerations when using PCA9517D in a design? A: It is important to ensure that the VCC voltage supplied to PCA9517D is within the specified range and that the I2C bus capacitance does not exceed the recommended limits to maintain reliable operation.

Please note that these answers are general and may vary depending on the specific requirements and implementation of PCA9517D in a technical solution.