Over 600 obsolete distributor catalogs now available on the Datasheet Archive - UV EPROM, 256K Bit (32K x 8) CMOS EPROM, 70ns, Pkg Style 28 Lead CERDIP
The maximum operating temperature range for the AM27C256-70DC is -40°C to +85°C.
The power-up and power-down sequences for the AM27C256-70DC should be handled slowly and smoothly to prevent voltage spikes and ensure data integrity. A power-up ramp time of 10ms to 100ms and a power-down ramp time of 10ms to 100ms are recommended.
A 0.1uF ceramic capacitor should be placed as close as possible to the VCC pin of the AM27C256-70DC to decouple the voltage supply. Additional decoupling capacitors may be required depending on the system design and layout.
To ensure data integrity during power-down or brownout conditions, it is recommended to use a voltage supervisor or a power-on reset circuit to detect when the voltage supply drops below a certain threshold and hold the device in a reset state until the voltage supply returns to a stable level.
The maximum clock frequency that can be used with the AM27C256-70DC is 70ns, which corresponds to a clock frequency of 14.29MHz.
AM27C256-70DC datasheet
by AMD
