CY7C271-35WMB

CY7C271-35WMB is a Cypress 256 Kbit power-switched ultraviolet-erasable PROM organized as 32,768 × 8. The exact ordering row specifies a 35 ns access time, W22 28-lead 300-mil windowed CerDIP, and the military operating range. The Cypress data sheet specifies 5 V ±10% operation from -55°C to +125°C, with 130 mA maximum operating supply current and 40 mA maximum standby current for military-range devices.

This device is erased through its quartz window with ultraviolet exposure and then programmed with the specified EPROM programming algorithm; it is not electrically reprogrammable in-system. ZZX Electronics lists 905 pcs with date code 2136. Before use, verify programmed versus erased state, window and label condition, top marking, programming compatibility, lot/date-code evidence, storage history and any contract-specific screening paperwork. The data sheet does not identify this part as radiation tolerant, and the WMB code alone should not be presented as proof of a specific screening flow. Send an RFQ for current lot photos, traceability and inspection options.