PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
LVCMOS/LVTTL F
REQUENCY
S
YNTHESIZER
F
EATURES
•
One LVCMOS/LVTTL output, 15Ω typical output
impedence and one reference clock output
•
40MHz, 10pF parallel resonant crystal
•
Output frequencies: 100MHz or 106.25MHz
•
RMS phase jitter @ 106.25MHz, using a 40MHz crystal
(637kHz - 5MHz): 0.78ps (typical)
•
3.3V operating supply
•
0°C to 70°C ambient operating temperature
•
Availabe in both standard and lead-free RoHS-compliant
packages
G
ENERAL
D
ESCRIPTION
The ICS840001-32 is a two output LVCMOS/
LVTTL Synthesizer and is a member of the
HiPerClockS™
HiPerClocks
TM
family of high perfor mance
devices from ICS. The device uses a 40MHz
crystal to provide a 40MHz reference clock
output and to synthesize a 100MHz or 106.25MHz
output. The ICS840001-32 has excellent <1ps phase
jitter performance over the 637kHz – 5MHz integration
range. The ICS840001-32 is packaged in a 3mm x 3mm
16-pin VFQFN, making it ideal for use on space con-
strained boards.
IC
S
F
UNCTION
T
ABLE
Inputs
Crystal Frequency
(MHz)
40
40
Outputs
SEL Input
0
1
Q Output
Frequency (MHz)
100
106.25
REF_OUT
Frequency (MHz)
40
40
B
LOCK
D
IAGRAM
40MHz
P
IN
A
SSIGNMENT
V
DDA
GND
nc
nc
REF_OUT
V
DD
1
XTAL_OUT 2
XTAL_IN
16 15 14 13
12
11
10
9
5
GND
Q
V
DDO
_
Q
V
DD
REF_OUT
OSC
XTAL_OUT
SEL
(Pullup)
Synthesizer
100MHz or
106.25MHz
XTAL_IN 3
SEL 4
6
nc
Q
7
V
DDO
_
REF
_
OUT
8
GND
ICS840001-32
16-Lead VFQFN
3mm x 3mm x 0.95 package body
K Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on
initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications
without notice.
840001CK-32
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 23, 2005
1
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
