CAT9555HT6I-GT2

Product Overview

Category

The CAT9555HT6I-GT2 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used for digital input/output (I/O) expansion in various electronic devices and systems.

Characteristics

• The CAT9555HT6I-GT2 is a high-performance I/O expander with 16 bidirectional input/output pins.
• It operates at a voltage range of 1.8V to 5.5V, making it compatible with a wide range of systems.
• This IC offers a low standby current consumption, making it suitable for power-sensitive applications.
• It supports both the I²C and SMBus serial interfaces, providing flexibility in communication protocols.

Package

The CAT9555HT6I-GT2 is available in a small form factor TSSOP-24 package.

Essence

The essence of this product lies in its ability to expand the number of available I/O pins in electronic systems, enabling efficient interfacing with peripheral devices.

Packaging/Quantity

The CAT9555HT6I-GT2 is typically packaged in reels, containing 2500 units per reel.

Specifications

• Supply Voltage: 1.8V - 5.5V
• Number of I/O Pins: 16
• Communication Interface: I²C, SMBus
• Standby Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CAT9555HT6I-GT2 features a total of 24 pins, each serving a specific function. The pin configuration is as follows:

1. SDA - Serial Data Input/Output
2. SCL - Serial Clock Input
3. A0 - Address Select Bit 0
4. A1 - Address Select Bit 1
5. A2 - Address Select Bit 2 6-21. I/O0-I/O15 - Bidirectional Input/Output Pins
6. RESET - Reset Input
7. VCC - Supply Voltage
8. GND - Ground

Functional Features

• Bidirectional I/O Expansion: The CAT9555HT6I-GT2 provides 16 additional bidirectional I/O pins, expanding the capabilities of electronic systems.
• Flexible Communication Interface: It supports both I²C and SMBus interfaces, allowing seamless integration with various microcontrollers and devices.
• Low Standby Current Consumption: With a standby current of less than 1µA, this IC is suitable for power-sensitive applications.
• Address Selectability: The address select bits (A0, A1, A2) enable multiple devices to be connected on the same bus, increasing system scalability.

Advantages and Disadvantages

Advantages

• Compact form factor
• Wide operating voltage range
• Low standby current consumption
• Multiple address selectability
• Compatible with popular communication protocols

Disadvantages

• Limited number of I/O pins (16)
• Requires external pull-up resistors for I²C/SMBus communication

Working Principles

The CAT9555HT6I-GT2 operates by receiving commands and data through the I²C or SMBus interface. It can function as an input or output expander depending on the configuration set by the host microcontroller. The bidirectional I/O pins can be individually configured as inputs or outputs, allowing for versatile interfacing with peripheral devices.

Detailed Application Field Plans

The CAT9555HT6I-GT2 finds applications in various fields, including but not limited to: - Consumer electronics - Industrial automation - Automotive systems - Internet of Things (IoT) devices - Robotics

Detailed and Complete Alternative Models

• MCP23017: 16-Bit I/O Expander with I²C Interface
• PCF8574: 8-Bit I/O Expander with I²C Interface
• MAX7313: 16-Bit I/O Expander with SPI Interface
• TCA9539: 16-Bit I/O Expander with I²C Interface

These alternative models offer similar functionality and can be considered as alternatives to the CAT9555HT6I-GT2.

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