25LC512-M/SN

Product Overview

Category: Integrated Circuit (IC)

Use: Non-volatile Serial EEPROM Memory

Characteristics: - Low-power CMOS technology - 512 Kbit (64 Kbyte) capacity - SPI bus compatible - 1 MHz clock rate - 2.5V to 5.5V operating voltage range - 100,000 erase/write cycles endurance - Data retention of over 200 years - 8-byte page write mode - Self-timed erase and write cycles - Write protect pin for hardware protection - Industrial temperature range (-40°C to +85°C) - Small form factor package (SOIC-8)

Package: SOIC-8 (Small Outline Integrated Circuit)

Essence: The 25LC512-M/SN is a non-volatile serial EEPROM memory chip that provides reliable data storage in various electronic devices. It offers a high level of integration, low power consumption, and compatibility with the Serial Peripheral Interface (SPI) bus.

Packaging/Quantity: The 25LC512-M/SN is typically sold in reels or tubes containing multiple units. The exact quantity depends on the supplier and customer requirements.

Specifications

• Capacity: 512 Kbit (64 Kbyte)
• Operating Voltage Range: 2.5V to 5.5V
• Clock Rate: Up to 1 MHz
• Endurance: 100,000 erase/write cycles
• Data Retention: Over 200 years
• Page Write Mode: 8 bytes per page
• Temperature Range: -40°C to +85°C

Pin Configuration

The 25LC512-M/SN has an 8-pin Small Outline Integrated Circuit (SOIC) package. The pin configuration is as follows:

┌───┬───┐ │ 1 │ 8 │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ 4 │ 5 │ └───┴───┘

Pin Description: 1. Chip Select (CS): Active low input for device selection. 2. Serial Clock (SCK): Input for synchronous serial clock. 3. Master Out Slave In (MOSI): Input for data from the master to the device. 4. Ground (GND): Ground reference for the device. 5. Master In Slave Out (MISO): Output for data from the device to the master. 6. Write Protect (WP): Input for hardware write protection. 7. Serial Data Input/Output (SDI/SDO): Bidirectional data pin. 8. Power Supply (VCC): Positive power supply voltage.

Functional Features

• Non-volatile memory: Retains data even when power is removed.
• SPI compatibility: Supports communication with microcontrollers and other devices using the SPI bus protocol.
• Low-power consumption: Suitable for battery-powered applications.
• Self-timed erase and write cycles: Simplifies programming operations.
• Hardware write protection: Allows for protecting critical data from accidental modification.
• Wide operating temperature range: Can be used in industrial environments.

Advantages and Disadvantages

Advantages: - High data retention and endurance. - Compact package size. - Low power consumption. - Easy integration with SPI bus systems. - Reliable performance over a wide temperature range.

Disadvantages: - Limited storage capacity compared to larger EEPROMs. - Slower write speed compared to some other memory technologies. - Requires external components for proper operation.

Working Principles

The 25LC512-M/SN operates based on the principles of EEPROM (Electrically Erasable Programmable Read-Only Memory). It uses a floating gate transistor structure to store and retrieve data. The memory cells can be electrically erased and reprogrammed using specific voltage levels applied to the control pins.

During write operations, data is transferred serially from the master device to the 25LC512-M/SN through the SPI bus. The chip select pin is activated to enable communication, and the clock signal synchronizes the data transfer. The device internally manages the programming of individual memory cells.

During read operations, the stored data can be accessed by sending appropriate commands and addresses to the device. The data is then transmitted back to the master device via the MISO pin.

Detailed Application Field Plans

The 25LC512-M/SN is widely used in various electronic systems that require non-volatile memory for data storage. Some common application fields include:

1. Consumer Electronics: Used in smart TVs, set-top boxes, digital cameras, and portable media players for storing configuration settings, user preferences, and firmware updates.
2. Industrial Automation