7C274 / CY7C274-45WC / CY7C274 / 27C256 eprom

7C274 / CY7C274-45WC / CY7C274 / 27C256 eprom

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These parts are NEW parts that have a factory program already on them. They have never been installed on a working board. They will have a factory sticker on them.
Please note: The following spec sheet / information is provided by the manufacturer and may cover several different items and/or products. I am offering the part listed in the heading and picture ONLY.
According to the IC Master. The CY7C274 is the same as a 27C256.
32K x 8 Power Switched and Reprogrammable PROM
• CMOS for optimum speed/power
• Windowed for reprogrammability
—Less than 165 mW when deselected
• EPROM technology 100% programmable
• Slim 300-mil package (7C271)
• Direct replacement for bipolar PROMs
• Capable of withstanding >2001V static discharge
The CY7C271 and CY7C274 are high-performance 32,768-word by 8-bit CMOS PROMs. When disabled (CE HIGH), the 7C271/7C274 automatically powers down into a low-power stand-by mode. The CY7C271 is packaged in the 300-mil slim package. The CY7C274 is packaged in the industry standard 600-mil package. Both the 7C271 and 7C274 are available in a cerDIP package equipped with an erasure window to provide for reprogrammability. When exposed to UV light, the PROM is erased and can be reprogrammed. The memory cells utilize proven EPROM floating gate technology and byte-wide intelligent programming algorithms.
Reading the 7C271 is accomplished by placing active LOW signals on CS
1 and CE, and an active HIGH on CS2. Reading the 7C274 is accomplished by placing active LOW signals on OE and CE. The contents of the memory location addressed by the address lines (A0 ? A14) will become available on the output lines (O0 ? O7).
Cypress Semiconductor :: UV-Erasable PROM (EPROM) - TTL Compatible I/O
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