PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
F
EATURES
•
1 differential 3.3V LVPECL output
•
Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
•
Output frequencies: 125MHz or 62.5MHz (selectable)
•
RMS phase jitter @ 125MHz, using a 25MHz crystal
(12KHz - 20MHz): 0.62ps (typical)
•
RMS phase noise at 125MHz (typical)
Offset
Noise Power
100Hz ............... -94.6 dBc/Hz
1KHz .............. -122.8 dBc/Hz
10KHz .............. -132.2 dBc/Hz
100KHz .............. -132.0 dBc/Hz
•
3.3V operating supply
•
0°C to 70°C ambient operating temperature
•
Industrial temperature information available upon request
G
ENERAL
D
ESCRIPTION
The ICS843022 is a Fibre Channel Clock Generator
and a member of the HiPerClocks
TM
family of high
HiPerClockS™
performance devices from ICS. The ICS843022
uses a 25MHz crystal to synthesize 125MHz or
62.5MHz. The ICS843022 has excellent phase
jitter performance, over the 12KHz – 20MHz integration range.
The ICS843022 is packaged in a small 8-pin TSSOP, making
it ideal for use in systems with limited board space.
ICS
F
UNCTION
T
ABLE
Inputs
FREQ_SEL
0
1
Output Frequencies
(with a 25MHz crystal)
125MHz
62.5MHz
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
V
CCA
V
EE
XTAL_OUT
XTAL_IN
1
2
3
4
8
7
6
5
V
CC
Q0
nQ0
FREQ_SEL
XTAL_IN
OSC
XTAL_OUT
Output
Divider
nQ0
Q0
ICS843022
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
FREQ_SEL
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.
843022AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 30, 2004
1
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
Type
Power
Power
Input
Input
Description
Analog supply pin.
Negative supply pin.
Crystal oscillator interface. XTAL_in is the input,
XTAL_OUT is the output.
Pulldown Frequency select pin. LVCMOS/LVTTL interface levels.
Differential clock outputs. LVPECL interface levels.
Core supply pin.
T
ABLE
1. P
IN
D
ESCRIPTIONS
Number
1
2
3, 4
5
6, 7
8
Name
V
CCA
V
EE
XTAL_OUT,
XTAL_IN
FREQ_SEL
nQ0, Q0
V
CC
Output
Power
NOTE:
Pulldown
refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
T
ABLE
2. P
IN
C
HARACTERISTICS
Symbol
C
IN
R
PULLDOWN
Parameter
Input Capacitance
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
Maximum
Units
pF
KΩ
843022AG
www.icst.com/products/hiperclocks.html
2
REV. A NOVEMBER 30, 2004
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
4.6V
-0.5V to V
CC
+ 0.5V
50mA
100mA
101.7°C/W (0 mps)
-65°C to 150°C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional
operation of product at these conditions or any conditions be-
yond those listed in the
DC Characteristics
or
AC Character-
istics
is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
CC
Inputs, V
I
Outputs, I
O
Continuous Current
Surge Current
Package Thermal Impedance,
θ
JA
Storage Temperature, T
STG
T
ABLE
3A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
V
CC
V
CCA
I
EE
Parameter
Core Supply Voltage
Analog Supply Voltage
Power Supply Current
Test Conditions
Minimum
3.135
3.135
Typical
3.3
3.3
Maximum
3.465
3.465
85
Units
V
V
mA
T
ABLE
3B. LVCMOS/LVTTL DC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
V
IH
V
IL
I
IH
I
IL
Parameter
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
FREQ_SEL
FREQ_SEL
V
CC
= V
IN
= 3.465V
V
CC
= 3.465V, V
IN
= 0V
-5
Test Conditions
Minimum
2
-0.3
Typical
Maximum
V
CC
+ 0.3
0.8
150
Units
V
V
µA
µA
T
ABLE
3C. LVPECL DC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
V
OH
V
OL
V
SWING
Parameter
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
Test Conditions
Minimum
V
CC
- 1.4
V
CC
- 2.0
0.6
Typical
Maximum
V
CC
- 0.9
V
CC
- 1.7
1.0
Units
V
V
V
NOTE 1: Outputs terminated with 50
Ω
to V
CC
- 2V.
T
ABLE
4. C
RYSTAL
C
HARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Test Conditions
Minimum
Typical
Fundamental
25
50
7
MHz
Ω
pF
Maximum
Units
843022AG
www.icst.com/products/hiperclocks.html
3
REV. A NOVEMBER 30, 2004
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
Test Conditions
Minimum
Typical
125
62.5
125MHz,
Integration Range: 12KHz - 20MHz
62.5MHz,
Integration Range: 12KHz - 20MHz
20% to 80%
0.62
0.63
400
50
Maximum
Units
MHz
MHz
ps
ps
ps
%
T
ABLE
5. AC C
HARACTERISTICS
,
V
CC
= 3.3V±5%, T
A
=0°C
TO
70°C
Symbol
f
OUT
Parameter
Output Frequency
t
jit(Ø)
t
R
/ t
F
RMS Phase Jitter; NOTE 1
Output Rise/Fall Time
odc
Output Duty Cycle
NOTE 1: Please refer to the Phase Noise Plot.
843022AG
www.icst.com/products/hiperclocks.html
4
REV. A NOVEMBER 30, 2004
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS843022
F
EMTO
C
LOCKS
™ C
RYSTAL
-
TO
-
3.3V LVPECL C
LOCK
G
ENERATOR
T
YPICAL
P
HASE
N
OISE AT
125MH
Z
0
-10
-20
-30
-40
-50
➤
Fibre Channel Filter
125MHz
RMS Phase Jitter (Random)
12KHz to 20MHz = 0.62ps (typical)
N
OISE
P
OWER
dBc
Hz
-60
-70
-80
-90
-100
-110
Raw Phase Noise Data
➤
-120
-130
-140
-150
-160
-170
-180
-190
100
1k
➤
Phase Noise Result by adding
Fibre Channel Filter to raw data
10k
100k
1M
10M
100M
O
FFSET
F
REQUENCY
(H
Z
)
843022AG
www.icst.com/products/hiperclocks.html
5
REV. A NOVEMBER 30, 2004
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