PM8621 PMC-Sierra, Inc., PM8621 Datasheet - Page 181

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

18.1
18.2
18
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
Ordering and Thermal Information
Packaging Information
Thermal Information
In full operation (10–12 ports), the NSE-8G is designed to operate over a wide
temperature range when used with a heat sink with a worst case Junction to case
Tj (Tjc) of 1 °C/W and is suited for industrial applications such as outside plant
equipment
Notes
1.
2.
3.
4.
Part No.
PM8621-BIAP
Maximum long-term operating junction temperature to ensure adequate long-term life
Maximum junction temperature for short-term excursions with guaranteed continued functional
performance.
Minimum ambient temperature
Device Compact Model
Operating power is dissipated in package
(watts) at worst case power supply
Power (watts)
term operation
JC
JB
SA
SA
Short-term is understood as the definition stated in Telcordia Generic Requirements GR-63-Core
to-board thermal resistance is obtained by simulating conditions described in JEDEC Standard, JESD
51
attached material
The actual
with all the components in place
JC,
SA
(
(
and
+
0
0
C/W)
C/W)
is the thermal resistance of the heat sink to ambient.
the junction-to-case thermal resistance is a measured nominal value + 2 sigma.
CS
CS
(
0
C/W)
required for long-
1
SA
This condition will typically be reached when local ambient reaches 70 Deg C.
3
required may vary according to the air speed at the location of the device in the system
4
2
2.56
Description
480 Uni Ball Grid Array (UBGA) Package
# 1
# 4
#5
CS
is the thermal resistance of the heat sink
NSE-8G™ Standard Product Data Sheet
Ambient
Heat Sink
Case
Junction
Board
SA
JC
CS
JB
Device Compact
JB
, the junction-
Model
Preliminary
105
-40
125
0
C
0
0
180
C
C