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Sable CPU Module Specification

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11.3 <strong>CPU</strong> <strong>Module</strong> Max DC Power Requirement<br />

Copyright © 1993 Digital Equipment Corporation.<br />

The power requirements shown in Table 84 assume a 24ns System bus cycle.<br />

Table 84: <strong>CPU</strong> Power Requirements<br />

Configuration EV Clock 3.3V ± 5% DC 5V ± 5% DC<br />

Speed (ns) Max (amps) Max (amps)<br />

B2020-AA 5.26 14.5 13.0<br />

B2024-AA 3.64 0.0 25.0<br />

11.4 Environmental <strong>Specification</strong>s - Class B modified<br />

11.4.1 Temperature<br />

11.4.1.1 Storage<br />

Range -40 degrees Celsius to +66 degrees Celsius.<br />

Before operating a module which is at a temperature beyond the operating range,<br />

that module must first be brought to an environment within the operating range,<br />

and then allowed to stabilize for a reasonable length of time. (Five or more minutes,<br />

depending on air circulation.)<br />

11.4.1.2 Operating<br />

Range 5 degrees Celsius to 35 degrees Celsius environment with 10 degrees Celsius<br />

rise from inlet to outlet air.<br />

The enclosure is Class B rated with a 10 to 40 degrees Celsius environment and<br />

10 degrees Celsius rise from inlet to outlet with a 20-80% noncondensing relative<br />

humidity.<br />

De-rate the maximum operating temperature by 1.82 degrees Celsius for each 1000<br />

meters of altitude above sea level. Reference: Standard Atmosphere, Standard Gravity.<br />

11.4.2 Relative Humidity<br />

Physical and Electrical Characteristics 203

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