25LC256-I/SN

Product Overview

Category: Integrated Circuit (IC)

Use: Non-volatile Serial EEPROM Memory

Characteristics: - Low-power CMOS technology - 256 Kbit (32 Kbyte) capacity - SPI interface - 1 MHz clock rate - 2.5V to 5.5V operating voltage range - 10,000,000 erase/write cycles endurance - Data retention of over 200 years - 8-byte page write mode for faster programming

Package: SOIC (Small Outline Integrated Circuit)

Essence: The 25LC256-I/SN is a non-volatile memory chip that provides reliable data storage in various electronic devices.

Packaging/Quantity: The 25LC256-I/SN is available in tape and reel packaging with 2,500 units per reel.

Specifications

• Memory Size: 256 Kbit (32 Kbyte)
• Interface: SPI (Serial Peripheral Interface)
• Clock Rate: Up to 1 MHz
• Operating Voltage Range: 2.5V to 5.5V
• Endurance: 10,000,000 erase/write cycles
• Data Retention: Over 200 years
• Page Write Mode: 8-byte page write

Detailed Pin Configuration

The 25LC256-I/SN has a total of 8 pins:

1. Chip Select (/CS): Used to enable or disable the chip.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Used to input data into the chip.
4. Serial Data Output (SO): Outputs data from the chip.
5. Write Protect (/WP): When held low, prevents write operations.
6. VCC: Power supply voltage.
7. Ground (GND): Ground reference.
8. Hold (/HOLD): Used to pause serial communication.

Functional Features

• Non-volatile memory: Retains data even when power is disconnected.
• Serial interface: Uses SPI for easy integration with microcontrollers.
• Low-power consumption: Suitable for battery-powered devices.
• High endurance: Can withstand frequent erase/write cycles.
• Wide operating voltage range: Compatible with various systems.

Advantages and Disadvantages

Advantages: - Reliable data storage - Easy integration with microcontrollers - Low power consumption - High endurance - Wide operating voltage range

Disadvantages: - Limited storage capacity compared to other memory options - Slower write speed compared to some alternatives

Working Principles

The 25LC256-I/SN utilizes non-volatile memory technology to store data. It communicates with a microcontroller or other devices through the SPI interface. The chip can be enabled or disabled using the Chip Select pin. Data can be written to or read from the chip using the Serial Data Input and Output pins. The Write Protect pin allows for protection against accidental writes. The memory is organized into pages, and the chip supports both byte-level and page-level write operations.

Detailed Application Field Plans

The 25LC256-I/SN is widely used in various electronic devices that require non-volatile memory for data storage. Some common application fields include:

1. Consumer Electronics: Used in smart TVs, set-top boxes, and audio/video players for storing configuration settings and user preferences.
2. Industrial Automation: Employed in industrial control systems, PLCs (Programmable Logic Controllers), and data loggers for storing critical data and program code.
3. Automotive Electronics: Integrated into automotive ECUs (Engine Control Units), infotainment systems, and instrument clusters for storing calibration data, firmware, and vehicle parameters.
4. Medical Devices: Utilized in medical equipment such as patient monitors, infusion pumps, and diagnostic devices for storing patient data and device settings.
5. IoT (Internet of Things): Incorporated into IoT devices for storing sensor data, device configurations, and firmware updates.

Detailed and Complete Alternative Models

1. 25AA256: Similar to the 25LC256-I/SN but with a smaller package size (8-pin DIP).
2. 24LC256: Another non-volatile serial EEPROM memory chip with similar specifications but a different pin configuration.
3. AT25SF041: Serial flash memory chip with higher storage capacity (4 Mbit) and faster write speed.

These alternative models offer different form factors, pin configurations, and storage capacities to suit various design requirements.

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