ISL8491IBZ

Product Overview

Category

ISL8491IBZ belongs to the category of integrated circuits (ICs).

Use

The ISL8491IBZ is commonly used as a voltage level translator and bidirectional I2C bus buffer. It facilitates communication between devices operating at different voltage levels.

Characteristics

• Voltage level translation: The ISL8491IBZ can translate signals between two different voltage domains, allowing devices with incompatible voltage levels to communicate effectively.
• Bidirectional operation: It supports bidirectional data transfer, enabling communication in both directions.
• High-speed operation: The IC is capable of operating at high speeds, making it suitable for applications requiring fast data transmission.
• Low power consumption: The ISL8491IBZ is designed to consume minimal power, ensuring efficient energy usage.
• Small package size: It comes in a compact package, making it suitable for space-constrained applications.

Package and Quantity

The ISL8491IBZ is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels containing a specified quantity of ICs.

Specifications

• Supply voltage range: 1.65V to 5.5V
• Operating temperature range: -40°C to +85°C
• Maximum data rate: 3.4 Mbps
• Number of channels: 1
• Input/output voltage levels: Compatible with I2C bus levels (0V to VCC)
• Quiescent current: 0.8µA (typical)

Pin Configuration

The ISL8491IBZ has a total of 8 pins, which are assigned specific functions:

1. VCCA: Power supply input for channel A
2. SDA: Serial data input/output for channel A
3. SCL: Serial clock input for channel A
4. GND: Ground
5. VCCB: Power supply input for channel B
6. SDA: Serial data input/output for channel B
7. SCL: Serial clock input for channel B
8. NC: No connection

Functional Features

• Voltage level translation: The ISL8491IBZ can translate logic signals between two voltage domains, allowing devices operating at different voltage levels to communicate seamlessly.
• Bidirectional buffer: It acts as a bidirectional buffer, ensuring reliable data transfer in both directions.
• Automatic direction sensing: The IC automatically senses the direction of data flow and adjusts the signal accordingly, simplifying the design process.
• Open-drain outputs: The SDA and SCL pins feature open-drain outputs, providing compatibility with various bus systems.

Advantages and Disadvantages

Advantages

• Enables communication between devices with different voltage levels
• Supports bidirectional data transfer
• High-speed operation
• Low power consumption
• Compact package size

Disadvantages

• Limited number of channels (only one)
• May require additional components for certain applications

Working Principles

The ISL8491IBZ operates by monitoring the voltage levels on its input pins and translating them to the appropriate levels on the output pins. It uses a combination of level shifters and buffers to ensure accurate and reliable data transfer between devices operating at different voltage levels. The IC also incorporates automatic direction sensing, which eliminates the need for external control signals to determine the data flow direction.

Application Field Plans

The ISL8491IBZ finds application in various fields, including but not limited to: - Industrial automation - Consumer electronics - Automotive systems - Telecommunications - Medical devices

Alternative Models

Several alternative models are available that offer similar functionality to the ISL8491IBZ. Some notable alternatives include: - PCA9306: A bidirectional I2C bus voltage level translator with two channels. - TXB0108: An eight-channel bi-directional voltage-level translator with automatic direction sensing. - SN74LVC1T45: A single-bit dual-supply bus transceiver and voltage level translator.

These alternative models can be considered based on specific application requirements and design constraints.

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