The X28HC256FMB-12 is a high-speed, 256K CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor (later acquired by Intersil, and now part of Renesas). This type of memory is non-volatile, meaning it retains its data even when power is removed. It's designed for applications requiring in-system programmability and fast access times.

Applications

• Embedded Systems: Storing configuration data, calibration settings, and firmware updates in embedded systems.
• Industrial Control: Storing program code and data for industrial controllers and automation equipment.
• Instrumentation: Storing calibration data and system parameters in test and measurement instruments.
• Telecommunications: Storing network configuration data and firmware updates in communication equipment.
• Automotive Electronics: Storing calibration data, engine management parameters, and security codes in automotive systems.

Features

• Non-Volatile Memory: Retains data even when power is removed.
• In-System Programmability: Can be programmed and erased while installed in the system.
• High Speed: Offers fast read and write access times.
• Low Power Consumption: Designed for low-power operation, making it suitable for battery-powered applications.
• High Endurance: Supports a high number of erase/write cycles.
• Data Retention: Long data retention period, ensuring data integrity over time.
• CMOS Technology: Utilizes CMOS technology for low power consumption and high performance.

Benefits

• Flexible Data Storage: Provides flexible and reliable data storage for a wide range of applications.
• Easy Updates: In-system programmability allows for easy firmware updates and configuration changes.
• Fast Access Times: High-speed operation ensures quick data retrieval and processing.
• Low Power Operation: Low power consumption extends battery life in portable devices.
• Reliable Performance: High endurance and long data retention ensure reliable performance over time.

Technical Specifications

The specific technical specifications for the X28HC256FMB-12 EEPROM include:

• Memory Size: 256 Kbits (32K x 8)
• Access Time: 120 ns
• Operating Voltage: 5V ± 10%
• Operating Current: Typically 30 mA (active), 100 uA (standby)
• Endurance: 10,000 Erase/Write Cycles (minimum)
• Data Retention: 10 Years (minimum)
• Operating Temperature: 0°C to +70°C
• Package: 28-Pin DIP (Dual In-Line Package) or Surface Mount packages. "FMB" likely indicates a surface mount package.

The X28HC256FMB-12 from Renesas (originally Xicor) is a robust and reliable EEPROM designed for applications requiring in-system programmability, fast access times, and non-volatile data storage. Its low power consumption and high endurance make it suitable for a variety of industrial, commercial, and automotive applications.