
87158AG
www.idt.com
REV. C JULY 25, 2010
13
ICS87158
1-TO-6, LVPECL-TO-HCSL/LVCMOS
÷1, ÷2, ÷4 CLOCK GENERATOR
RELIABILITY INFORMATION
TRANSISTOR COUNT
The transistor count for ICS87158 is: 2631
TABLE 6A.
θ
JA
VS
. AIR FLOW TABLE FOR 48 LEAD TSSOP PACKAGE
θθθθθ
JA by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
82.6°C/W
70.3°C/W
63.7°C/W
Multi-Layer PCB, JEDEC Standard Test Boards
58.3°C/W
52.3°C/W
49.9°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
TABLE 6B.
θ
JA
VS
. AIR FLOW TABLE FOR 48 LEAD SSOP PACKAGE
θθθθθ
JA by Velocity (Linear Feet per Minute)
0
200
500
Multi-Layer PCB, JEDEC Standard Test Boards
52.9°C/W
46.0°C/W
42.0°C/W