S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
18 Ordering and Thermal Information
Table 53 Ordering and Thermal Information
Part No.
PM7348
Description
324 Plastic Ball Grid Array (PBGA)
This product is designed to operate over a wide temperature range in industrial applications
such as Outside Plant Equipment. For the thermal characteristics below, a power of 0.684 watts
was used (as derived from section 16).
88°C
Maximum long-term operating junction temperature (TJ) to ensure adequate long-term
life.
125°C
Maximum junction temperature (TJ) for short-term excursions with guaranteed
continued functional performance. This condition will typically be reached when the
local ambient temperature reaches [temperature].
-40°C
Minimum ambient temperature (TA)
Table 54 Thermal information - Theta Ja vs. Airflow
Forced Air (Linear Feet per Minute)
Conv
41.3
22.9
100
200
300
400
500
Theta JA @
specified power
36.9
21.2
33.9
20.0
31.8
19.2
30.5
18.6
29.5
18.2
Dense Board
JEDEC Board
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
316
PMC [ PMC-SIERRA, INC ]
