CAT24C21WI-GT3

Product Overview

Category

The CAT24C21WI-GT3 belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This chip is commonly used for non-volatile data storage in various electronic devices, such as microcontrollers, computers, and consumer electronics.

Characteristics

• Non-volatile: The CAT24C21WI-GT3 retains stored data even when power is removed.
• Electrically erasable: The chip allows for easy modification and erasure of stored data.
• High storage capacity: This model has a storage capacity of 2 kilobits (256 bytes).
• Low power consumption: The chip operates on low power, making it suitable for battery-powered devices.

Package

The CAT24C21WI-GT3 comes in a small surface-mount package, which facilitates easy integration into circuit boards.

Essence

The essence of this chip lies in its ability to store and retrieve data reliably, even in the absence of power. It offers a compact and efficient solution for non-volatile memory requirements in electronic systems.

Packaging/Quantity

The CAT24C21WI-GT3 is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Storage Capacity: 2 kilobits (256 bytes)
• Interface: I2C (Inter-Integrated Circuit)
• Operating Voltage: 1.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1 million cycles
• Data Retention: 100 years

Detailed Pin Configuration

The CAT24C21WI-GT3 chip has a total of 8 pins, which are assigned specific functions as follows:

1. VCC: Power supply voltage input
2. SDA: Serial data input/output for I2C communication
3. SCL: Serial clock input for I2C communication
4. WP: Write protect pin (optional)
5. A0: Address bit 0 (used for device addressing)
6. A1: Address bit 1 (used for device addressing)
7. GND: Ground connection
8. NC: No connection (unused pin)

Functional Features

• Random access: The chip allows for random access to any memory location, enabling efficient data retrieval.
• Byte-level read and write operations: Data can be written or read at the byte level, providing flexibility in data manipulation.
• Hardware write protection: The optional write protect pin (WP) allows for hardware-based protection against accidental data modification.
• Low standby current: The chip consumes minimal power in standby mode, contributing to energy efficiency.

Advantages and Disadvantages

Advantages

• Non-volatile storage: Data remains intact even during power loss or system shutdown.
• Compact size: The small form factor of the chip enables space-efficient integration into electronic devices.
• Easy integration: The I2C interface simplifies connectivity with other components in a system.
• High endurance: The chip can withstand frequent write cycles without compromising performance.

Disadvantages

• Limited storage capacity: With a capacity of 2 kilobits, this chip may not be suitable for applications requiring large amounts of data storage.
• Relatively slow write speed: Compared to other memory technologies, EEPROMs generally have slower write speeds.

Working Principles

The CAT24C21WI-GT3 utilizes electrically erasable programmable read-only memory technology. It consists of a grid of memory cells that can be individually programmed or erased using electrical signals. The stored data is retained through the use of floating gate transistors, which trap and hold electrical charges.

During write operations, the desired data is sent to the chip through the I2C interface. The chip then applies high voltages to specific memory cells, altering their charge states and storing the data. Reading data involves sending appropriate commands to the chip, which retrieves the stored information and sends it back through the I2C interface.

Detailed Application Field Plans

The CAT24C21WI-GT3 finds applications in various fields, including:

1. Embedded systems: It can be used for storing configuration settings, calibration data, or firmware updates in microcontroller-based systems.
2. Consumer electronics: The chip can store user preferences, device settings, or log data in devices such as smart TVs, set-top boxes, or home automation systems.
3. Automotive electronics: It can be employed for storing critical data like mileage, vehicle settings, or error logs in automotive electronic control units (ECUs).
4. Industrial automation: The chip can be utilized for storing parameters, calibration data, or event logs in industrial control systems or programmable logic controllers (PLCs).

Detailed and Complete Alternative Models