24LC21/P

Product Overview

Category

The 24LC21/P is a serial EEPROM (Electrically Erasable Programmable Read-Only Memory) integrated circuit.

Use

It is commonly used for non-volatile data storage in various electronic devices, such as microcontrollers and other digital systems.

Characteristics

• The 24LC21/P offers low power consumption and high reliability.
• It comes in a small package size, making it suitable for space-constrained applications.
• The device is capable of operating over a wide voltage range.

Package

The 24LC21/P is available in an 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence

This EEPROM provides a cost-effective and efficient solution for storing configuration parameters and other critical data in embedded systems.

Packaging/Quantity

The 24LC21/P is typically sold in reels or tubes, with quantities varying based on the manufacturer's specifications.

Specifications

• Memory Size: 1 Kbit (128 x 8)
• Interface: I2C (Inter-Integrated Circuit)
• Operating Voltage: 1.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Write Cycle Endurance: 1,000,000 cycles
• Data Retention: 200 years

Detailed Pin Configuration

1. A0: Chip Address Input
2. A1: Chip Address Input
3. A2: Chip Address Input
4. VSS: Ground
5. SDA: Serial Data
6. SCL: Serial Clock
7. WP: Write Protect
8. VCC: Power Supply

Functional Features

• I2C Interface: The 24LC21/P communicates with the host microcontroller using the I2C protocol, allowing for easy integration into existing systems.
• Write Protection: The WP pin can be utilized to protect the memory from accidental writes, enhancing data integrity.
• Sequential Read: The device supports sequential read operations, enabling efficient retrieval of stored data.

Advantages and Disadvantages

Advantages

• Low power consumption
• Small form factor
• High reliability and endurance
• Wide operating voltage range

Disadvantages

• Limited storage capacity compared to larger EEPROMs
• Slower write speeds compared to some other non-volatile memory technologies

Working Principles

The 24LC21/P utilizes electrically programmable memory cells that can be individually written, read, and erased. When data is written to the EEPROM, it is stored in the memory cells using a combination of electrical charges, allowing the information to be retained even when the power is removed.

Detailed Application Field Plans

The 24LC21/P is commonly employed in various applications, including: - Embedded system configuration storage - Industrial control systems - Automotive electronics - Consumer electronics - Medical devices

Detailed and Complete Alternative Models

Some alternative models to the 24LC21/P include: - 24LC22: Higher capacity (2 Kbit) EEPROM - 24LC01B: Lower capacity (128 bit) EEPROM - 24AA02: I2C-compatible 2 Kbit EEPROM

In conclusion, the 24LC21/P is a versatile and reliable serial EEPROM that finds widespread use in diverse electronic applications, offering a balance of performance, size, and cost-effectiveness.

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