24LC21A/P

Product Overview

Category: Integrated Circuit (IC)

Use: The 24LC21A/P is a serial EEPROM (Electrically Erasable Programmable Read-Only Memory) IC. It is commonly used for non-volatile data storage in various electronic devices.

Characteristics: - Low power consumption - High reliability - Small form factor - Easy to integrate into circuit designs

Package: The 24LC21A/P is available in an 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: This IC provides a reliable and efficient solution for storing small amounts of data in electronic devices.

Packaging/Quantity: The 24LC21A/P is typically sold in reels or tubes, with quantities varying depending on the manufacturer and distributor.

Specifications

• Memory Capacity: 1 kilobit (128 bytes)
• Interface: I2C (Inter-Integrated Circuit)
• Operating Voltage: 2.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Endurance: 1,000,000 cycles
• Data Retention: 200 years

Pin Configuration

The 24LC21A/P has 8 pins, each serving a specific function:

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 for hardware write protection
5. A0: Address bit 0 for device addressing
6. A1: Address bit 1 for device addressing
7. A2: Address bit 2 for device addressing
8. GND: Ground reference

Functional Features

• Byte-wise Read and Write operations
• Random and Sequential Read modes
• Software and Hardware Write Protection
• Self-timed Write cycle completion
• 100 kHz and 400 kHz I2C bus compatibility

Advantages and Disadvantages

Advantages: - Low power consumption makes it suitable for battery-powered devices - High reliability ensures data integrity - Small form factor allows for easy integration into compact designs - Flexible addressing options with A0, A1, and A2 pins

Disadvantages: - Limited storage capacity (1 kilobit) - Slower write speed compared to other memory technologies - Vulnerable to electromagnetic interference

Working Principles

The 24LC21A/P utilizes EEPROM technology, which allows for electrically erasing and reprogramming of data. It uses the I2C communication protocol to interface with microcontrollers or other devices. The IC stores data in non-volatile memory cells, ensuring that the information remains intact even when power is removed.

Detailed Application Field Plans

The 24LC21A/P can be used in various applications, including but not limited to: - Consumer electronics (e.g., smartwatches, remote controls) - Industrial automation systems - Automotive electronics - Medical devices - IoT (Internet of Things) devices

Alternative Models

Some alternative models to the 24LC21A/P include: - 24LC01B: 1 kilobit EEPROM with a smaller package size - 24LC256: 256 kilobit EEPROM with higher storage capacity - 24LC515: 512 kilobit EEPROM with extended temperature range

These alternative models offer different capacities, package options, and additional features to suit specific application requirements.

In conclusion, the 24LC21A/P is a reliable and efficient serial EEPROM IC that provides non-volatile data storage capabilities. Its low power consumption, high reliability, and small form factor make it suitable for various electronic devices. While it has limitations in terms of storage capacity and write speed, it offers flexibility and ease of integration.