ics840-125 Holt Integrated Circuits, Inc., ics840-125 Datasheet - Page 6

• Manufacturer Part Number: ics840-125
• Description: 125mhz, Lvcmos/lvttl Oscillator Replacement
• Manufacturer: Holt Integrated Circuits, Inc.

C
The ICS840-125 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 1 below were determined using a 25MHz, 18pF paral-
840AG-125
RYSTAL
I
NPUT
Integrated
Circuit
Systems, Inc.
I
NTERFACE
18pF Parallel Cry stal
A
X1
www.icst.com/products/hiperclocks.html
Figure 1. C
PPLICATION
RYSTAL
C1
12p
C2
12p
6
I
lel resonant crystal and were chosen to minimize the ppm
error. The optimum C1 and C2 values can be slightly adjusted
for different board layouts.
I
NFORMATION
NPU
XTAL_OUT
XTAL_IN
t I
NTERFACE
125MH
O
SCILLATOR
Z
, LVCMOS/LVTTL
ICS840-125
R
REV. A FEBRUARY 3, 2006
EPLACEMENT