NG80960JD-66 查看數據表（PDF） - Unspecified

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NG80960JD-66

3.3 V EMBEDDED 32-BIT MICROPROCESSOR

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80960JD

3.2 Package Thermal Specifications

The 80960JD is specified for operation when TC

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

100°C for both PGA and PQFP packages. Case

temperature may be measured in any environment

to determine whether the 80960JD is within its

specified operating range. The case temperature

should be measured at the center of the top surface,

opposite the pins.

θCA 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 can be calculated from θJC

(thermal resistance from junction to case) using the

following equation:

TJ = 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 ICC from Table 14 and

VCC. 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

θJA may be significantly reduced by adding a

heatsink and/or by increasing airflow.

Table 12 shows the maximum ambient temperature

(TA) permitted without exceeding TC for both PGA

and PQFP packages. The values are based on

typical ICC and VCC of +3.3 V, with a TCASE of

+100°C.

Table 10. 132-Lead PGA Package Thermal Characteristics

Thermal Resistance — °C/Watt

Airflow — ft./min (m/sec)

Parameter

0

200 400 600 800

(0) (1.01) (2.03) (3.04) (4.06)

θJC (Junction-to-Case)

θCA (Case-to-Ambient) (No Heatsink)

0.7 0.7 0.7 0.7 0.7

25

19

14

12

11

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

15

9

6

5

4

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

16

8

6

5

4

1000

(5.08)

0.7

10

4

4

θJA

θCA

θJ-PIN

θJC

θJ-CAP

NOTES:

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

2. θJA = θJC + θCA

3. θJ-CAP = 5.6°C/W (approx.) (no heatsink)

4. θJ-PIN = 6.4°C/W (inner pins) (approx.) (no heatsink)

5. θJ-PIN = 6.2°C/W (outer pins) (approx.) (no heatsink)

6. θJ-CAP = 3°C/W (approx.) (with heatsink)

7. θJ-PIN = 3.3°C/W (inner pins) (approx.) (with heatsink)

8. θJ-PIN = 3.3°C/W (outer pins) (approx.) (with heatsink)

PRODUCT PREVIEW

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