Integrated
Circuit
Systems, Inc.
ICS840-125
125MH
Z
, LVCMOS/LVTTL
O
SCILLATOR
R
EPLACEMENT
F
EATURES
•
One LVCMOS/LVTTL output, 15Ω output impedance
•
Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
•
Output frequency: 125MHz
•
Random jitter: 3.7ps (typical)
•
Deterministic jitter: 0.1ps (typical)
•
3.3V operating supply
•
0°C to 70°C ambient operating temperature
•
Available in both standard and lead-free RoHS-compliant
packages
G
ENERAL
D
ESCRIPTION
The ICS840-125 is a Gigabit Ethernet Oscillator
Replacement and a member of the
HiPerClockS™
HiPerClocks
TM
family of high perfor mance
devices from ICS. The ICS840-125 uses a
25MHz crystal to synthesize 125MHz. The
ICS840-125 has excellent jitter perfor mance. The
ICS840-125 is packaged in a small 8-pin TSSOP, making
it ideal for use in systems with limited board space.
IC
S
B
LOCK
D
IAGRAM
OE
Pullup
P
IN
A
SSIGNMENT
V
DD
XTAL_OUT
XTAL_IN
OE
1
2
3
4
8
7
6
5
nc
Q
V
DDO
GND
25MHz
XTAL_IN
Clock
Synthesizer
125MHz
Q
ICS840-125
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
XTAL_OUT
ICS840-125
8-Lead SOIC
3.90mm x 4.92mm x 1.37mm body package
M Package
Top View
840AG-125
www.icst.com/products/hiperclocks.html
1
REV. A FEBRUARY 3, 2006
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
