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Functional Description

The CY7C261, CY7C263, and CY7C264 are high-performance 8192-word by 8-bit CMOS PROMs. When deselected, the CY7C261 automatically powers down into a low-power standby mode. It is packaged in a 300-mil-wide package. The CY7C263 and CY7C264 are packaged in 300-mil-wide and 600-mil-wide packages respectively, and do not power down when deselected. The reprogrammable packages are equipped with an erasure window; when exposed to UV light, these PROMs are erased and can then be reprogrammed. The memory cells utilize proven EPROM floating-gate technology and byte-wide intelligent programming algorithms.

Features

? CMOS for optimum speed/power

? Windowed for reprogrammability

? High speed

— 20 ns (Commercial)

— 25 ns (Military)

? Low power

— 660 mW (Commercial)

— 770 mW (Military)

? Super low standby power (7C261)

— Less than 220 mW when deselected

— Fast access: 20 ns

? EPROM technology 100 programmable

? Slim 300-mil or standard 600-mil packaging available

? 5V ± 10 VCC, commercial and military

? Capable of withstanding greater than 2001V static discharge

? TTL-compatible I/O

? Direct replacement for bipolar PROMs