ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 63

• Manufacturer Part Number: ACS8509
• Description: Synchronous Equipment Timing Source for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

ACS8509 SETS
ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Thermal Conditions
The device is rated for full temperature range when this package is used with a 4 layer or more PCB. Copper coverage
must exceed 50%. All pins must be soldered to the PCB. Maximum operating temperature must be reduced when the
device is used with a PCB with less than these requirements.
Figure 25 Typical 100 Pin LQFP Footprint
Width = 0.3 mm
Pitch = 0.5 mm
1.85 mm
F8509D_004QFNFootprint100_01
Notes: (i) (1) Solderable to this limit.
(ii) Square package - dimensions apply in both X and Y directions.
(iii) Typical example. The user is responsible for ensuring compatibility with PCB manufacturing process, etc.
Revision 2.00/January 2006 © Semtech Corp.
Page 63
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