Over 600 obsolete distributor catalogs now available on the Datasheet Archive - UV EPROM, 256K Bit (32K x 8) CMOS EPROM, 90ns, Pkg Style 28 Lead CERDIP
The maximum operating temperature range for the AM27C256-90DC is 0°C to 70°C.
The AM27C256-90DC can be programmed using a UV EPROM programmer or a specialized programming device. The programming process typically involves applying a high voltage (usually 12.5V) to the VPP pin and sending the data to be programmed to the device.
The AM27C256-90DC can be erased by exposing it to UV light with a wavelength of 253.7 nm for a minimum of 15 minutes. The erase process can also be accelerated by increasing the UV light intensity or duration.
Yes, the AM27C256-90DC can be used in a 5V system. However, the VCC pin should be connected to a 5V power supply, and the VPP pin should be connected to a 5V or 12.5V power supply, depending on the programming mode.
AM27C256-90DC datasheet
by AMD
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