EPROM OTP 256K-Bit 32K x 8 120ns 28-Pin PDIP

The Microchip Technology Inc. 27C256 is a CMOS 256K bit electrically Programmable Read Only Memory (EPROM). The device is organized as 32K words by 8 bits (32K bytes). Accessing individual bytes from an address transition or from power-up (chip enable pin going low) is accomplished in less than 90 ns. This very high speed device allows the most sophisticated microprocessors to run at full speed without the need for WAIT states. CMOS design and processing enables this part to be used in systems where reduced power consumption and reliability are requirements. A complete family of packages is offered to provide the most flexibility in applications. For surface mount applications, PLCC, or SOIC packaging is available. Tape and reel packaging is also available for PLCC or SOIC packages.

• High speed performance
  • 90 ns access time available
• CMOS Technology for low power consumption
  • 20 mA Active current
  • 100 µA Standby current
• Factory programming available
• Auto-insertion-compatible plastic packages
• Auto ID aids automated programming
• Separate chip enable and output enable controls
• High speed “express” programming algorithm
• Organized 32K x 8: JEDEC standard pinouts
  • 28-pin Dual-in-line package
  • 32-pin PLCC Package
  • 28-pin SOIC package
  • Tape and reel
• Data Retention > 200 years
• Available for the following temperature ranges:
  • Commercial: 0°C to +70°C
  • Industrial: -40°C to +85°C
  • Automotive: -40°C to +125°C