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PDF ICS840021I Data sheet ( Hoja de datos )
| Número de pieza | ICS840021I | |
| Descripción | CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ICS840021I (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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Integrated
Circuit
Systems, Inc.
ICS840021I
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
GENERAL DESCRIPTION
The ICS840021I is a Gigabit Ethernet Clock
ICS Generator and a member of the HiPerClocksTM
HiPerClockS™ family of high performance devices from ICS. The
ICS840021I uses a 25MHz crystal to synthesize
125MHz. The ICS840021I has excellent phase
jitter performance, over the 1.875MHz – 20MHz integration
range. The ICS840021I is packaged in a small 8-pin TSSOP,
making it ideal for use in systems with limited board space.
www.DataSheet4U.com
FEATURES
• 1 LVCMOS/LVTTL output, 15Ω output impedence
• Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
• Output frequency: 125MHz
• VCO range: 560MHz to 680MHz
• RMS phase jitter @ 125MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.48ps (typical) (3.3V)
Offset
Noise Power
100Hz ............... -97.8 dBc/Hz
1kHz .............. -124.6 dBc/Hz
10kHz .............. -132.5 dBc/Hz
100kHz .............. -131.1 dBc/Hz
• Voltage supply modes:
V /V = 3.3V
DD DDA
VDD/VDDA = 2.5V
• -40°C to 85°C ambient operating temperature
• Lead-Free package fully RoHS compliant
BLOCK DIAGRAM
OE
25MHz
XTAL_IN
OSC
Phase
VCO
÷5
Q0
XTAL_OUT
Detector
÷25
(fixed)
PIN ASSIGNMENT
VDDA
OE
XTAL_OUT
XTAL_IN
1
2
3
4
8 VDD
7 Q0
6 GND
5 nc
ICS840021I
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
840021AGI
www.icst.com/products/hiperclocks.html
1
REV. A MAY 19, 2005
1 page  
Integrated
Circuit
Systems, Inc.
ICS840021I
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
TYPICAL PHASE NOISE AT 125MHZ (3.3V OR 2.5V)
www.DataSheet4U.com
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
100
Gigabit Ethernet Filter
125MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz (3.3V) = 0.48ps (typical)
1.875MHz to 20MHz (2.5V) = 0.50ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
Gigabit Ethernet Filter to raw data
1k
10k
100k
1M
10M 100M
OFFSET FREQUENCY (HZ)
840021AGI
www.icst.com/products/hiperclocks.html
5
REV. A MAY 19, 2005
5 Page 
Integrated
Circuit
Systems, Inc.
ICS840021I
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
TABLE 10. ORDERING INFORMATION
Part/Order Number
Marking
Package
Shipping Packaging Temperature
ICS840021AGI
021AI
8 lead TSSOP
tube
-40°C to 85°C
ICS840021AGIT
021AI
8 lead TSSOP
2500 tape & reel
-40°C to 85°C
ICS840021AGILF
TBD
8 lead "Lead-Free" TSSOP
tube
-40°C to 85°C
ICS840021AGILFT
TBD
8 lead "Lead-Free" TSSOP 2500 tape & reel
-40°C to 85°C
NOTE: Parts that are ordered with an "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.
www.DataSheet4U.com
The aforementioned trademarks, HiPerClockS™ and FemtoClocks™ are a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use
or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use
in normal commercial and industrial applications. Any other applications such as those requiring high reliability or other extraordinary environmental requirements are not
recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product
for use in life support devices or critical medical instruments.
840021AGI
www.icst.com/products/hiperclocks.html
REV. A MAY 19, 2005
11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ICS840021I.PDF ] | |
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