Content for 27C256


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, SOIC, VSOP or TSOP packaging is available. Tape and reel packaging is also available for PLCC or SOIC packages.

Ultracompact minimalistic 6809 Computer V2

“A working 6809 Computer on a 5x5 cm PCB that could fit on your keychain ( and even has a hole for that :) ) This is version 2 that fixes some issues of the first version. A tiny and minimalistic 6809 board …

6502 retro controller board

“Classic CPU as an “Arduino style” microcontroller An attempt to create “Adruino inspired” set of modular boards, containing thirty years old parts - primarily vintage 6502 microprocessor. About one year ago I noticed that some sellers on popular Chinese auction site …