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Datasheet: 023AI (Integrated Circuit Systems)

FEMTOCLOCKS-TM CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR

 

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Integrated Circuit Systems

Document Outline

843023AGI
www.icst.com/products/hiperclocks.html
REV. A JUNE 29, 2005
1
Integrated
Circuit
Systems, Inc.
ICS843023I
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-3.3V, 2.5V
LVPECL C
LOCK
G
ENERATOR
G
ENERAL
D
ESCRIPTION
The ICS843023I is a Gigabit Ethernet Clock
Generator and a member of the HiPerClocks
TM
family of high performance devices from ICS.
The ICS843023I uses a 25MHz crystal to
synthesize 250MHz. The ICS843023I has
excellent phase jitter performance, over the 1.875MHz 20MHz
integration range. The ICS843023I is packaged in a small
8-pin TSSOP, making it ideal for use in systems with
limited board space.
F
EATURES
1 differential 3.3V LVPECL output
Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
Output frequency range: 245MHz - 320MHz
VCO range: 490MHz - 640MHz
RMS phase jitter @ 250MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.39ps (typical)
Phase noise:
Offset
Noise Power
100Hz ............... -86.3 dBc/Hz
1kHz .............. -114.6 dBc/Hz
10kHz .............. -125.6 dBc/Hz
100kHz ................ -126 dBc/Hz
3.3V or 2.5V operating supply
-40C to 85C ambient operating temperature
Lead-Free package fully RoHS compliant
HiPerClockSTM
ICS
ICS843023I
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
V
CC
XTAL_OUT
XTAL_IN
V
EE
1
2
3
4
Q
nQ
V
CC
OE
8
7
6
5
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
OSC
Phase
Detector
VCO
2
(fixed)
20
(fixed)
XTAL_IN
XTAL_OUT
Q
nQ
25MHz
OE
843023AGI
www.icst.com/products/hiperclocks.html
REV. A JUNE 29, 2005
2
Integrated
Circuit
Systems, Inc.
ICS843023I
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-3.3V, 2.5V
LVPECL C
LOCK
G
ENERATOR
T
ABLE
2. P
IN
C
HARACTERISTICS
T
ABLE
1. P
IN
D
ESCRIPTIONS
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843023AGI
www.icst.com/products/hiperclocks.html
REV. A JUNE 29, 2005
3
Integrated
Circuit
Systems, Inc.
ICS843023I
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-3.3V, 2.5V
LVPECL C
LOCK
G
ENERATOR
T
ABLE
3A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
CC
= 3.3V5%, T
A
= -40C
TO
85C
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,
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CC
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OR
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= -40C
TO
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A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
CC
4.6V
Inputs, V
I
-0.5V to V
CC
+ 0.5V
Outputs, I
O
Continuous Current
50mA
Surge Current
100mA
Package Thermal Impedance,
JA
101.7C/W (0 mps)
Storage Temperature, T
STG
-65C to 150C
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.
T
ABLE
3C. LVCMOS/LVTTL DC C
HARACTERISTICS
,
V
CC
= 3.3V5%
OR
2.5V5%, T
A
= -40C
TO
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843023AGI
www.icst.com/products/hiperclocks.html
REV. A JUNE 29, 2005
4
Integrated
Circuit
Systems, Inc.
ICS843023I
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-3.3V, 2.5V
LVPECL C
LOCK
G
ENERATOR
T
ABLE
5A. AC C
HARACTERISTICS
,
V
CC
= 3.3V5%, T
A
= -40C
TO
85C
T
ABLE
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843023AGI
www.icst.com/products/hiperclocks.html
REV. A JUNE 29, 2005
5
Integrated
Circuit
Systems, Inc.
ICS843023I
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
-3.3V, 2.5V
LVPECL C
LOCK
G
ENERATOR
T
YPICAL
P
HASE
N
OISE
AT
250MH
Z
(3.3V)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
250MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.39ps (typical)
O
FFSET
F
REQUENCY
(H
Z
)
N
OISE
P
O
WER
dBc
Hz
Phase Noise Result by adding
Gigabit Ethernet Filter to raw data
Raw Phase Noise Data
Gigabit Ethernet Filter
250MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.39ps (typical)
O
FFSET
F
REQUENCY
(H
Z
)
N
OISE
P
O
WER
dBc
Hz
Phase Noise Result by adding
Gigabit Ethernet Filter to raw data
Raw Phase Noise Data
Gigabit Ethernet Filter
T
YPICAL
P
HASE
N
OISE
AT
250MH
Z
(2.5V)
100
1k
10k
100k
1M
10M
100M
500M
100
1k
10k
100k
1M
10M
100M
500M
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
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