ICS840002-32 Datasheet, PDF (6/8 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840002-32
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
APPLICATION INFORMATION
CRYSTAL INPUT INTERFACE
The ICS840002-32 has been characterized with 18pF paral-
lel resonant crystals. The capacitor values shown in Figure 1
below were determined using an 18pF parallel resonant crys-
tal and were chosen to minimize the ppm error.
X1
18pF Parallel Crystal
XTAL_OUT
C1
33p
XTAL_IN
C2
27p
ICS840002-32
Figure 1. CRYSTAL INPUt INTERFACE
RELIABILITY INFORMATION
TABLE 6. θ_JAVS. AIR FLOW TABLE FOR 8 LEAD TSSOP
θ_JA by Velocity (Meters Per Second)
Multi-Layer PCB, JEDEC Standard Test Boards
0
101.7°C/W
1
90.5°C/W
TRANSISTOR COUNT
The transistor count for ICS840002-32 is: 2322
840002BG-32
www.icst.com/products/hiperclocks.html
6
2.5
89.8°C/W
REV. A JUNE 27, 2005