Supports the following output frequencies: 156.25MHz,
125MHz, 62.5MHz
VCO range: 560MHz - 680MHz
RMS phase jitter @ 156.25MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.44ps (typical)
Power supply modes:
Core/Output
3.3V/1.8V
2.5V/1.8V
-40°C to 85°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
General Description
The ICS8422002I-01 is a 2 output LVHSTL
Synthesizer optimized to generate Ethernet
HiPerClockS™
reference clock frequencies and is a member of the
HiPerClocks
TM
family of high performance clock
solutions from IDT. Using a 25MHz 18pF parallel
resonant crystal, the following frequencies can be generated
based on the 2 frequency select pins (F_SEL[1:0]): 156.25MHz,
125MHz and 62.5MHz. The ICS8422002I-01 uses IDT’s 3
rd
generation low phase noise VCO technology and can achieve 1ps
or lower typical rms phase jitter, easily meeting Ethernet jitter
requirements. The ICS8422002I-01 is packaged in a small 20-pin
TSSOP package.
ICS
Pin Assignment
nc
V
DDO
Q0
nQ0
MR
nPLL_SEL
nc
V
DDA
F_SEL0
V
DD
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DDO
Q1
nQ1
GND
V
DD
nXTAL_SEL
REF_CLK
XTAL_IN
XTAL_OUT
F_SEL1
Block Diagram
F_SEL[1:0]
Pulldown
nPLL_SEL
Pulldown
2
ICS422002I-01
20-Lead TSSOP
6.5mm x 4.4mm x 0.925mm package body
G Package
Top View
Q0
1
F_SEL[1:0]
0 0 ÷4
0 1 ÷5
1 0 ÷10
1 1
Not Used
nQ0
REF_CLK
Pulldown
25MHz
1
XTAL_IN
OSC
XTAL_OUT
nXTAL_SEL
Pulldown
0
Phase
Detector
VCO
Q1
nQ1
0
M = 25 (fixed)
MR
Pulldown
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization and/or qualification.
Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT™ / ICS™
LVHSTL FREQUENCY SYNTHESIZER
1
ICS8422002AGI-01 REV. C NOVEMBER 1, 2007
ICS8422002I-01
FEMTOCLOCKS™ CRYSTAL-TO-LVHSTL FREQUENCY SYNTHESIZER
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