PM7312 pmc-sierra, PM7312 Datasheet - Page 280

• Manufacturer Part Number: PM7312
• Description: Freedm 32a1024l Assp Telecom Standard Datasheet
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2021833, Issue 2
20
20.1 Central Office Environment – No Heatsink
Thermal Information
This product is designed to operate over a wide temperature range and is suited for central office
equipment
Table 65 Central Office Thermal Information
Maximum long-term operating junction temperature (T
term life
Maximum junction temperature (T
continued functional performance
local ambient reaches 70 °C.
Minimum ambient temperature (T
Table 66 Thermal Resistance vs. Air Flow
Airflow
q
Table 67 Device Compact Model
Junction-to-Top Thermal Resistance, q
Junction-to-Board Thermal Resistance, q
Power depends upon the operating mode. To obtain power information, refer to ‘High’ power
values in section 17.1 Power Requirements.
Notes
1.
2.
3.
4.
JA
(°C/W)
The minimum ambient temperature requirement for Central Office Equipment approximates the minimum
ambient temperature requirement for Commercial Equipment
Short-term is used as defined in Telcordia Technologies Generic Requirements GR-63-Core Core; for
more information about this standard, see [3]
q
(2S2P); for more information about this standard, see [4.1]
q
Standard JESD 51-8 (for more information about this standard, see [2]) and q
thermal resistance, is obtained by simulating conditions described in SEMI Standard G30-88 (for more
information about this standard, see [4])
JA
JB
, the junction-to-board thermal resistance, is obtained by simulating conditions described in JEDEC
is the total junction to ambient thermal resistance as measured according to JEDEC Standard JESD51
1
.
Natural
Convection
10.68
200 LFM
7.39
2
A
J
. This condition will typically be reached when
)
) for short-term excursions with guaranteed
FREEDM 32A1024L ASSP Telecom Standard Product Data Sheet
4
JT
JB
0.25°C/W
4.5 °C/W
400 LFM
6.63
3
J
) to ensure adequate long-
Top
Junction
Board
q
q
JT
JB
JT
, the junction-to-top
105°C
125°C
-5°C
Compact
Released
Device
Model
280