25LC256-I/P

Product Overview

Category: Integrated Circuit (IC)

Use: Non-volatile Serial EEPROM Memory

Characteristics: - Low-power CMOS technology - High-speed SPI interface - 256 Kbits of memory - 64-byte page write buffer - Self-timed erase and write cycles - Write protect pin for hardware data protection - Low standby current consumption

Package: DIP (Dual In-line Package)

Essence: The 25LC256-I/P is a non-volatile serial EEPROM memory chip that provides reliable data storage in various electronic devices. It offers high-speed data transfer, low power consumption, and a compact form factor.

Packaging/Quantity: The 25LC256-I/P is typically sold in tubes or trays, with each tube containing 45 chips.

Specifications

• Memory Size: 256 Kbits (32 Kbytes)
• Interface: Serial Peripheral Interface (SPI)
• Operating Voltage: 2.5V to 5.5V
• Maximum Clock Frequency: 10 MHz
• Data Retention: > 200 years
• Endurance: 1,000,000 erase/write cycles
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The 25LC256-I/P has a total of 8 pins, which are assigned specific functions:

1. Chip Select (CS): Used to enable/disable the chip for communication.
2. Serial Clock (SCK): Provides the clock signal for data transfer.
3. Serial Data Input (SI): Receives data from the microcontroller.
4. Serial Data Output (SO): Transmits data to the microcontroller.
5. Write Protect (WP): Allows hardware protection against accidental writes.
6. VCC: Power supply voltage (2.5V to 5.5V).
7. VSS: Ground reference.
8. HOLD: Optional pin for suspending serial communication.

Functional Features

• High-speed data transfer: The 25LC256-I/P supports a maximum clock frequency of 10 MHz, enabling fast read and write operations.
• Self-timed erase and write cycles: The chip manages the timing of erase and write operations, simplifying the programming process.
• Hardware data protection: The write protect pin (WP) allows users to prevent accidental modification of stored data.
• Low power consumption: The low-power CMOS technology used in the chip ensures minimal energy usage during operation and standby.

Advantages and Disadvantages

Advantages: - Compact form factor - High-speed data transfer - Self-timed erase and write cycles - Hardware data protection - Low power consumption

Disadvantages: - Limited memory size (256 Kbits)

Working Principles

The 25LC256-I/P operates based on the Serial Peripheral Interface (SPI) protocol. It communicates with a microcontroller using a synchronous serial interface, consisting of clock, data input, and data output lines. The chip stores data in non-volatile memory cells, which retain information even when power is removed. It supports both sequential and random access to memory locations, allowing flexible data storage and retrieval.

Application Field Plans

The 25LC256-I/P finds applications in various electronic devices that require non-volatile memory storage, such as: - Consumer electronics (e.g., TVs, set-top boxes) - Automotive systems (e.g., infotainment, engine control units) - Industrial automation (e.g., sensors, control systems) - Medical devices (e.g., patient monitors, diagnostic equipment) - Internet of Things (IoT) devices (e.g., smart home appliances, wearable devices)

Alternative Models

1. AT25080AN-10SU-2.7: 8 Kbits SPI Serial EEPROM, operating voltage 2.7V to 5.5V.
2. CAT24C256WI-GT3: 256 Kbits I2C Serial EEPROM, operating voltage 1.7V to 5.5V.
3. M93C86-WMN6TP: 16 Kbits Microwire Serial EEPROM, operating voltage 2.5V to 5.5V.

These alternative models offer similar functionality and memory capacity, providing options for different system requirements.

In conclusion, the 25LC256-I/P is a versatile non-volatile serial EEPROM memory chip that offers high-speed data transfer, low power consumption, and reliable data storage. Its compact size and hardware data protection make it suitable for various electronic applications.