CAT9554AYI-GT2

Product Overview

Category

CAT9554AYI-GT2 belongs to the category of integrated circuits (ICs).

Use

It is commonly used for digital I/O expansion in various electronic devices.

Characteristics

• Low power consumption
• Wide operating voltage range
• High-speed I²C interface
• 8-bit remote bidirectional I/O port
• Programmable output polarity inversion
• Schmitt trigger inputs for noise suppression
• Open-drain outputs with selectable pull-up resistors

Package

The CAT9554AYI-GT2 is available in a small outline package (SOIC) with 16 pins.

Essence

The essence of CAT9554AYI-GT2 lies in its ability to provide additional digital I/O ports for microcontrollers and other digital systems.

Packaging/Quantity

The product is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• I/O Port Count: 8
• I²C Bus Frequency: Up to 400kHz
• Output Current: 25mA per I/O pin
• Input Voltage High Level: 0.7 x VDD to VDD
• Input Voltage Low Level: 0 to 0.3 x VDD

Detailed Pin Configuration

1. SDA - Serial Data Input/Output
2. SCL - Serial Clock Input
3. A0 - Address Select Bit 0
4. A1 - Address Select Bit 1
5. RESET - Reset Input
6. INT - Interrupt Output
7. P0-P7 - Bidirectional I/O Ports
8. GND - Ground
9. VDD - Supply Voltage

Functional Features

• Bidirectional I/O ports allow both input and output operations.
• Programmable output polarity inversion for flexibility in signal control.
• Schmitt trigger inputs provide noise immunity and reliable signal detection.
• Open-drain outputs with selectable pull-up resistors enable easy interfacing with different voltage levels.

Advantages and Disadvantages

Advantages

• Low power consumption makes it suitable for battery-powered devices.
• Wide operating voltage range allows compatibility with various systems.
• High-speed I²C interface enables efficient data transfer.
• Programmable output polarity inversion enhances signal control flexibility.

Disadvantages

• Limited number of I/O ports may restrict its use in applications requiring a higher count.
• Lack of built-in protection features against overvoltage or ESD events.

Working Principles

CAT9554AYI-GT2 operates as an I/O expander by communicating with a microcontroller or other digital devices through the I²C bus. It receives commands and data from the master device and controls the bidirectional I/O ports accordingly. The programmable features, such as output polarity inversion and pull-up resistor selection, allow customization of signal behavior.

Detailed Application Field Plans

The CAT9554AYI-GT2 can be applied in various fields, including but not limited to: - Consumer electronics - Industrial automation - Internet of Things (IoT) devices - Automotive electronics - Medical equipment

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to CAT9554AYI-GT2 are: - MCP23017 - PCF8574 - MAX7313 - PCA9538

These alternatives provide comparable digital I/O expansion capabilities and can be considered based on specific application requirements.

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