The UPD41264V-12 is a 262,144-bit (256Kbit) Dynamic Random Access Memory (DRAM) chip manufactured by NEC. DRAM is a type of semiconductor memory widely used in computer systems, offering a balance between cost, density, and speed. The UPD41264V-12 is designed for applications needing moderate memory capacity with a specified access time.

Applications:

  
• Personal Computers: Used as main memory (RAM) in older PC systems.
  
• Graphics Cards: Employed as video RAM (VRAM) in graphics adapters of the time.
  
• Printers: Utilized in the memory subsystems of printers for storing print data and raster images.
  
• Industrial Control Systems: Integrated into embedded systems for data storage and processing.
  
• Video Game Consoles: Part of the memory architecture in early video game consoles.

Features:

  
• Capacity: 262,144 bits (256Kbit)
  
• Organization: Typically organized as 256K x 1 bit.
  
• Access Time: Offers an access time of 120ns.
  
• Refresh: Requires periodic refresh cycles to maintain data integrity.
  
• Power Consumption: Operates on a 5V power supply.
  
• Package: Available in various package types, including DIP (Dual In-line Package) and ZIP (Zig-zag In-line Package).

Benefits:

  
• Cost-Effective: Provides a reasonably priced memory solution for applications where high density isn't critical.
  
• Moderate Speed: Facilitates relatively quick data retrieval and storage for its generation.
  
• Standard Interface: Compatible with standard DRAM memory controllers.
  
• Widespread Use: Was a common component in numerous electronic devices.

Additional Details:

The UPD41264V-12 DRAM needs a periodic refresh cycle to retain stored data, which is characteristic of DRAM technology. The operating temperature typically ranges from 0°C to 70°C. Proper handling is necessary to prevent electrostatic discharge (ESD) damage. Consult the manufacturer's datasheet for detailed electrical specifications and application guidelines. Address multiplexing is employed to reduce the number of address pins required.