PM8621 PMC-Sierra, Inc., PM8621 Datasheet - Page 182

• Manufacturer Part Number: PM8621
• Description: NSE-8G Standard Product Data Sheet Preliminary
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
In partial operation (less than 10 ports), this product is designed to operate over a
wide temperature range and is suited for industrial applications such as outside
plant equipment.
Notes
1.
2.
3.
Maximum long-term operating junction temperature to ensure adequate long-term
life
Maximum junction temperature for short-term excursions with guaranteed
continued functional performance
local ambient reaches 85 Deg C.
Minimum ambient temperature
Thermal Resistance vs Air Flow
Airflow
Device Compact Model
Operating power is dissipated in package (watts) at
worst case power supply
Power (watts)
JA
JT
JB
Short-term is understood as the definition stated in Telcordia Generic Requirements GR-63-Core
JESD51 (2S2P)
resistance are obtained by simulating conditions described in JEDEC Standard, JESD 15-8
JA
JB
(
(
(
0
0
0
, the junction-to-board thermal resistance and
C/W)
C/W)
C/W)
, the total junction to ambient thermal resistance as measured according to JEDEC Standard
3
2.56
2
1
This condition will typically be reached when
Natural Convection
13.5
# 1
# 4
JT,
the residual junction to ambient thermal
200 LFM
12.2
NSE-8G™ Standard Product Data Sheet
Ambient
Board
Junction
JB
JT
400 LFM
11.8
105
125
-40
Compact
Device
Model
0
0
0
C
C
C
Preliminary
181