NG80960JS25 datasheet(63/86 Pages) INTEL

63 / 86 page

80960JA/JF/JD/JS/JC/JT 3.3 V Embedded 32-Bit Microprocessor

Datasheet

6.0

Thermal Specifications

The 80960Jx is specified for operation when TC (case temperature) is within the range of 0° C to

100° C for PGA, MPBGA and PQFP packages. Extended temperature devices are also available in

a PQFP package and an MPBGA package with TC = -40° C to 100° C. Case temperature may be

measured in any environment to determine whether the 80960Jx is within its specified operating

range. The case temperature should be measured at the center of the top surface, opposite the pins.

CA is the thermal resistance from case to ambient. Use the following equation to calculate TA, the

maximum ambient temperature to conform to a particular case temperature:

TA = TC - P (θCA)

Junction temperature (TJ) is commonly used in reliability calculations. TJ may be calculated from

JC (thermal resistance from junction to case) using the following equation:

TJ = TC + P (θJC)

Similarly, when TA is known, the corresponding case temperature (TC) may be calculated as

follows:

TC = TA + P (θCA)

Compute P by multiplying ICC from Table 21, “80960Jx ICC Characteristics” on page 39 and VCC.

See the following tables for

JC and θCA values:

For high speed operation, the processor’s

JA may be significantly reduced by adding a heatsink

and/or by increasing airflow.

Refer to the following tables for the maximum ambient temperature (TA) permitted without

exceeding TC for the PGA, MPBGA, and PQFP packages. The values are based on typical ICC and

VCC of +3.3 V, with a TC of +100° C.

Table 31. Thermal Resistance for

CA and θJC Reference Table

Package

Table

PGA package

Table 33 on page 64

MPBGA package

Table 34 on page 64 and Table 35 on page 65

PQFP package

Table 36 on page 65

Table 32. Maximum Ambient Temperature Reference Table

Processor

Table

80960JT processor

Table 37 on page 66

80960JC processor

Table 38 on page 66

80960JD processor

Table 39 on page 67

80960JS processor

Table 40 on page 67

80960JA/JF processor

Table 41 on page 68

NG80960JS25 데이터시트(PDF) 63 Page - Intel Corporation

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