Part Number : 27C256
Function : 256K (32x8) CMOS EPROM
Package : DIP, SOP 28 Pin, PLCC 32 Pin Type
Maker : Microchip Technology
Pinouts : 
Description :
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.
Features :
• High speed performance
- 90 ns access time available
• CMOS Technology for low power consumption
- 20 mA Active current
- 100 mA Standby current
• Factory programming available
• Auto-insertion-compatible plastic packages
• Auto ID aids automated programming
• Separate chip enable and output enable controls
Datasheet PDF Download : 
Others datasheet of same file :
27C256-10/P, 27C256-10/SO, 27C256-10/TS, 27C256-10/VS