80960JD datasheet(24/61 Pages) INTEL

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80960JD

PRELIMINARY

3.2

Package Thermal Specifications

The 80960JD is specified for operation when T

(case temperature) is within the range of 0°C to 85°C

for the (PGA) 80960JD-50, or 0°C to 100°C for the

(PQFP and PGA) 80960JD-40 and 80960JD-33.

Case

temperature

may

measured

any

environment to determine whether the 80960JD is

within specified operating range. The case temper-

ature 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 (T

is commonly used in

reliability calculations. T

J can be calculated from θJC

(thermal resistance from junction to case) using the

following equation:

J = TC + P (θJC)

Similarly, if TA is known, the corresponding case

temperature (TC) can be calculated as follows:

TC = TA + P (θCA)

Compute P by multiplying I

CC from Table 14 and

CC. Values for θJC and θCA are given in Table 10 for

the PGA package and Table 11 for the PQFP

package. For high speed operation, the processor’s

may be significantly reduced by adding a

heatsink and/or by increasing airflow.

Figure 6 shows the maximum ambient temperature

(TA) permitted without exceeding TC for the

80960JD-50 in a PGA package. Figure 7 illustrates

this

for

the

80960JD-40

PGA

and

PQFP

packages. The curves are based on minimum ICC

(hot) and maximum VCC of +5.25 V, with a TCASE of

+85°C for the 80960JD-50, or a TCASE of +100°C for

the 80960JD-40.

Table 10. 132-Lead PGA Package Thermal Characteristics

Thermal Resistance — °C/Watt

Parameter

Airflow — ft./min (m/sec)

(0)

200

(1.01)

400

(2.03)

600

(3.04)

800

(4.06)

1000

(5.08)

JC (Junction-to-Case)

CA (Case-to-Ambient) (No Heatsink)

CA (Case-to-Ambient) (Omnidirectional Heatsink)

CA (Case-to-Ambient) (Unidirectional Heatsink)

NOTES:

1. This table applies to a PGA device plugged into a socket or soldered directly into a board.

JA = θJC + θCA

J-CAP = 4°C/W (approx.)

J-PIN = 4°C/W (inner pins) (approx.)

J-PIN = 8°C/W (outer pins) (approx.)

J-CAP

J-PIN

80960JD Datasheet(PDF) 24 Page - Intel Corporation

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