The DQ28C256-200 is a high-performance, 256K (32K x 8) CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by SEEQ. This EEPROM offers a combination of fast access times and low power consumption, making it suitable for various embedded applications. The -200 designation indicates a 200ns access time.

Applications

• Embedded systems: For storing configuration data, calibration parameters, and boot code.
• Industrial control systems: For storing program code and data in programmable logic controllers (PLCs) and other industrial equipment.
• Instrumentation: For storing calibration data and setup parameters in test and measurement equipment.
• Telecommunications equipment: For storing configuration data and firmware in network devices.
• Automotive electronics: For storing calibration data and program code in engine control units (ECUs) and other automotive systems.

Features

• 256K (32K x 8) memory organization: Provides a large storage capacity for program code and data.
• CMOS technology: Offers low power consumption for battery-powered applications.
• Fast access time (200ns): Enables quick data retrieval for real-time applications.
• Electrically erasable and programmable: Allows for easy reprogramming and updating of stored data.
• JEDEC standard pinout: Simplifies integration into existing systems.
• TTL compatible inputs and outputs: Ensures compatibility with a wide range of microprocessors and microcontrollers.
• Automatic page write operation: Simplifies write operations and reduces programming time.
• Data polling for end-of-write detection: Allows for efficient monitoring of write operations.

Benefits

• High performance: Fast access times enable efficient data retrieval for real-time applications.
• Low power consumption: Suitable for battery-powered applications and reduces overall system power consumption.
• Easy programmability: Electrically erasable and programmable, allowing for easy updating of stored data.
• Large storage capacity: 256K memory organization provides ample storage space for program code and data.
• Simplified system integration: JEDEC standard pinout and TTL compatible inputs/outputs simplify integration into existing systems.
• Improved reliability: Data polling ensures accurate write operations and reduces the risk of data corruption.

Additional Details

The DQ28C256-200 typically operates from a single 5V power supply. It supports both byte-wide and page-mode write operations. The endurance rating (number of write cycles) is typically in the thousands, depending on operating conditions. Detailed specifications, including voltage ranges, operating temperatures, and timing diagrams, can be found in the manufacturer's datasheet.