
843081AGI-01
www.idt.com
REV. C JULY 25, 2010
1
ICS843081I-01
FEMTOCLOCKSCRYSTAL-TO-
3.3V, 2.5V LVPECL CLOCK MULTIPLIER
GENERAL DESCRIPTION
The ICS843081I-01 is an Ethernet Clock Multiplier. The
ICS843081I-01 accepts a crystal reference of 19.6MHz - 28MHz.
The ICS843081I-01 has excellent 1ps or lower phase jitter
performance, over the 1.875MHz - 20MHz integration range.
The ICS843081I-01 is packaged in a small 8-pin TSSOP, making
it ideal for use in systems with limited board space.
FEATURES
One differential LVPECL output
One crystal oscillator interface: 19.6MHz - 28MHz
Output frequency range: 490MHz - 700MHz
VCO range: 490MHz - 700MHz
RMS phase jitter @ 625MHz using a 25MHz reference
(1.875MHz - 20MHz): 0.32ps (typical)
3.3V or 2.5V operating supply
-40°C to 85°C ambient operating temperature
Available in both standard and lead-free RoHS compliant
packages
ICS843081I-01
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
VCCA
XTAL_OUT
XTAL_IN
VEE
1
2
3
4
VCC
Q
nQ
OE
8
7
6
5
VCO
490 - 700 MHz
Phase
Detector
M = ÷25 (fixed)
OE
XTAL_IN
XTAL_OUT
Q
nQ
BLOCK DIAGRAM
PIN ASSIGNMENT
FREQUENCY EXAMPLE FUNCTION TABLE
t
u
p
n
I
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r
e
i
l
p
i
t
l
u
M
(
N
/
M)
z
H
M
(
s
e
i
c
n
e
u
q
e
r
F
t
u
p
t
u
O
)
z
H
M
(
L
A
T
X
0
25
20
0
5
25
2
6
8
25
20
0
7