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100

AMD-K5 Processor Data Sheet 18522F/0—Jan1997

PRELIMINARY INFORMATION

12 Package Thermal Specifications

The AMD-K5 processor is specified for operation when T

CASE

(the case temperature) is within the range of 0°C to 70°C. T

CASE

can be measured in any environment to determine whether the

AMD-K5 processor is within the specified operating range. The

case temperature should be measured at the center of the top

surface opposite the pins.

The ambient temperature (T

) is guaranteed as long as T

CASE

not violated. The ambient temperature can be calculated from

and from the following equation:

CASE

= T

+ (P • θ

)

where:

, T

CASE

= Ambient and Case Temperature

= Case-to-ambient Thermal Resistance

P = Maximum Power Consumption

The value for θ

is given in Table 27 for the 1.90 sq. in., 296-

pin, ceramic SPGA case. Maximum T

is shown in Table 28 and

Table 29. The values for processor frequency in Table 28 apply

to the AMD-K5 processor model 0. The values for processor fre-

quency in Table 29 apply to the AMD-K5 processor models 1

and 2.

Table 27. θ

for the AMD-K5 Processor in 296-pin SPGA Package for

Typical Heat Sinks with Fans

Heat Sink With Fan

(length x width x height)

(°C/W)

Manufacturer - Part Number

1.885 in x 1.9 in x 1.04 in 0.81 Thermalloy, Inc. - 20961-TCM

1.95 in x 1.79 in x 1.06 in 1.3 Wakefield Engineering, Inc. - 709-100AB124

1.96 in x 1.96 in x 0.65 in 1.5 AAVID - 355455F00267

Notes:

1. Thermal interface material (e.g., thermal grease or thermal compound) is required between

the top of the processor case and the base of the heat sink.

1 2 ... 87 88 89 90 91 92 93 94 95 96 97 98 99 100

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