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Электронный компонент: ICS844022AGI-02

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844022AGI-02
www.icst.com/products/hiperclocks.html
REV. A JUNE 28, 2005
1
Integrated
Circuit
Systems, Inc.
ICS844022I-02
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
- LVDS
C
LOCK
G
ENERATOR
PRELIMINARY
G
ENERAL
D
ESCRIPTION
The ICS844022I-02 is an Ethernet Clock
Generator and a member of the HiPerClocks
TM
family of high performance devices from ICS. The
ICS844022I-02 uses an 18pF parallel resonant
crystal over the range of 24.5MHz - 34MHz. For
Ethernet applications, a 25MHz crystal is used and either
62.5MHz or 125MHz may be selected with the FREQ_SEL
pin. The ICS844022I-02 has excellent <1ps phase jitter
performance, over the 1.875MHz - 20MHz integration range.
The ICS844022I-02 is packaged in a small 8-pin TSSOP,
making it ideal for use in systems with limited board space.
F
EATURES
(1) Differential LVDS output
Crystal oscillator interface, 18pF parallel resonant crystal
(24.5MHz - 34MHz)
Output frequency range: 61.25MHz - 170MHz
VCO range: 490MHz - 680MHz
RMS phase jitter @ 125MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.44ps (typical)
3.3V or 2.5V operating supply
-40C to 85C ambient operating temperature
HiPerClockSTM
ICS
ICS844022I-02
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
V
DDA
GND
XTAL_OUT
XTAL_IN
1
2
3
4
V
DD
Q
nQ
FREQ_SEL
8
7
6
5
B
LOCK
D
IAGRAM
OSC
Phase
Detector
VCO
490MHz - 680MHz
M = 20
(fixed)
FREQ_SEL N
0 4
1 8
XTAL_IN
XTAL_OUT
Q
nQ
C
OMMON
C
ONFIGURATION
T
ABLE
- Gb E
THERNET
P
IN
A
SSIGNMENT
FREQ_SEL
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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.
background image
844022AGI-02
www.icst.com/products/hiperclocks.html
REV. A JUNE 28, 2005
2
Integrated
Circuit
Systems, Inc.
ICS844022I-02
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
- LVDS
C
LOCK
G
ENERATOR
PRELIMINARY
T
ABLE
2. P
IN
C
HARACTERISTICS
T
ABLE
1. P
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background image
844022AGI-02
www.icst.com/products/hiperclocks.html
REV. A JUNE 28, 2005
3
Integrated
Circuit
Systems, Inc.
ICS844022I-02
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
- LVDS
C
LOCK
G
ENERATOR
PRELIMINARY
T
ABLE
3A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
DD
= V
DDA
= 3.3V5%, T
A
= -40C
TO
85C
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BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
DD
4.6V
Inputs, V
I
-0.5V to V
DD
+ 0.5 V
Outputs, I
O
(LVDS)
Continuous Current
10mA
Surge Current
15mA
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
DD
= V
DDA
= 3.3V5%
OR
2.5V5%, T
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= -40C
TO
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3D. LVDS DC C
HARACTERISTICS
,
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DD
= V
DDA
= 3.3V5%, T
A
= -40C
TO
85C
T
ABLE
3B. P
OWER
S
UPPLY
DC C
HARACTERISTICS
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= V
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= 2.5V5%, T
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background image
844022AGI-02
www.icst.com/products/hiperclocks.html
REV. A JUNE 28, 2005
4
Integrated
Circuit
Systems, Inc.
ICS844022I-02
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
- LVDS
C
LOCK
G
ENERATOR
PRELIMINARY
T
ABLE
4. C
RYSTAL
C
HARACTERISTICS
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ABLE
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HARACTERISTICS
,
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background image
844022AGI-02
www.icst.com/products/hiperclocks.html
REV. A JUNE 28, 2005
5
Integrated
Circuit
Systems, Inc.
ICS844022I-02
F
EMTO
C
LOCKS
TM C
RYSTAL
-
TO
- LVDS
C
LOCK
G
ENERATOR
PRELIMINARY
P
ARAMETER
M
EASUREMENT
I
NFORMATION
O
UTPUT
R
ISE
/F
ALL
T
IME
O
FFSET
V
OLTAGE
S
ETUP
LVDS 3.3V O
UTPUT
L
OAD
AC T
EST
C
IRCUIT
LVDS 2.5V O
UTPUT
L
OAD
AC T
EST
C
IRCUIT
RMS P
HASE
J
ITTER
O
UTPUT
D
UTY
C
YCLE
/P
ULSE
W
IDTH
/P
ERIOD
SCOPE
Qx
nQx
LVDS
3.3V5%
POWER SUPPLY
+
-
Float GND
Q
nQ
100
out
out
LVDS
DC Input
V
OD
/
V
OD
V
DD
out
out
LVDS
DC Input
V
OS
/
V
OS
V
DD
V
DD
V
DD
Clock
Outputs
20%
80%
80%
20%
t
R
t
F
V
SW I N G
D
IFFERENTIAL
O
UTPUT
V
OLTAGE
S
ETUP
SCOPE
Qx
nQx
LVDS
2.5V5%
POWER SUPPLY
+
-
Float GND
Phase Noise Mask
Offset Frequency
f
1
f
2
Phase Noise Plot
RMS Jitter = Area Under the Masked Phase Noise Plot
Noise P
o
w
er
t
PW
t
PERIOD
t
PW
t
PERIOD
odc =
x 100%

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