
87974CYI
www.idt.com
REV. E JULY 26, 2010
12
ICS87974I
LOW SKEW, 1-TO-15,
LVCMOS/LVTTL CLOCK GENERATOR
RELIABILITY INFORMATION
TRANSISTOR COUNT
The transistor count for ICS87974I is: 4225
TABLE 6.
θ
JA
VS
. AIR FLOW TABLE FOR 52 LEAD LQFP
θθθθθ
JA by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
58.0°C/W
47.1°C/W
42.0°C/W
Multi-Layer PCB, JEDEC Standard Test Boards
42.3°C/W
36.4°C/W
34.0°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.