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For sale here we have the above…
These have been ‘pulled ‘ from working PCB’s and are fully working – guaranteed!
The X28C256 is an 32K x 8² EPROM, fabricated with
Xicor’s proprietary, high performance, floating gate
CMOS technology. Like all Xicor programmable non-
volatile memories the X28C256 is a 5V only device. The
X28C256 features the JEDEC approved pinout for byte-
wide memories, compatible with industry standard RAMs.
The X28C256 supports a 64-byte page write operation,
effectively providing a 78μs/byte write cycle and en-
abling the entire memory to be typically written in less
than 2.5 seconds. The X28C256 also features DATA
and Toggle Bit Polling, a system software support
scheme used to indicate the early completion of a write
cycle. In addition, the X28C256 includes a user-optional
software data protection mode that further enhances
Xicor’s hardware write protect capability.
Xicor E ²PROMs are designed and tested for applica-
tions requiring extended endurance. Inherent data re-
tention is greater than 100 years.
• Access Time: 200ns
• Simple Byte and Page Write
— Single 5V Supply
—No External High Voltages or VPP Control Circuits
— No Erase Before Write
— No Complex Programming Algorithms
—No Overerase Problem
• Low Power CMOS:
• Software Data Protection
— Protects Data Against System Level
• High Speed Page Write Capability
• Highly Reliable Direct Write ™ Cell
— Endurance: 100,000 Write Cycles
— Data Retention: 100 Years
• Early End of Write Detection
—Toggle Bit Polling
For datasheet SEARCH… Xicor X28C256P-25
Or go directly to…
These parts came to us as part of a lot of surplus stock from a large Milspec type Co. and have been kept in storage for some time. They have been pulled from sockets on working PCB’s, we have therefore classified them as ‘used’, the photographs are representative of their general appearance being of one of our actual stock, and, as with all our products they come with a full guarantee.
If you have similar items to this, or indeed any electronic components that are surplus to requirements please contact us with details.