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PDF ICS840002-32 Data sheet ( Hoja de datos )
| Número de pieza | ICS840002-32 | |
| Descripción | CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
The ICS840002-32 is a 2 output LVCMOS/
ICS LVTTL Synthesizer optimized to generate
HiPerClockS™ Fibre Channel or Serial ATA reference clock
frequencies and is a member of the
HiPerClocksTM family of high perfor mance
clock solutions from ICS. Using an 18pF parallel resonant
crystal, the following frequencies can be generated based
on 1 frequency select pin (SEL): 106.25MHz and 75MHz,
www.DataSheeot4rU2.1co2m.5MHz. The ICS840002-32 uses ICS’ 3rd generation
low phase noise VCO technology and can achieve 1ps or
lower typical rms phase jitter, easily meeting Fibre Channel
and Serial ATA jitter requirements. The ICS840002-32 is
packaged in a small 8-pin TSSOP package.
FEATURES
• Two LVCMOS/LVTTL outputs, 15Ω typical output impedance
• Crystal oscillator interface
• Output frequency range: 75MHz and 106.25MHz,
or 212.5MHz
• RMS phase jitter at 106.25MHZ (637kHz - 5MHz):
0.86ps (typical)
• Full 3.3V or 3.3V core/2.5V output supply mode
• 0°C to 70°C ambient operating temperature
SELECT FUNCTION TABLE
Input
SEL
0
1
Output Frequency Range (MHz)
Q0 Q1
75 106.25
75 212.5
BLOCK DIAGRAM
26.5625MHz
XTAL_IN
FemtoClock™
XTAL_OUT
SEL
PIN ASSIGNMENT
Q0
VDD 1
8 SEL
XTAL_OUT 2
7 Q0
XTAL_IN 3
6 VDDO
Q1
GND 4
5 Q1
ICS840002-32
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
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.
840002BG-32
www.icst.com/products/hiperclocks.html
REV. A JUNE 27, 2005
1
1 page  
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
1.65V±5%
VDD,
www.DataSheet4UV.cDoDmO
LVCMOS
GND
-1.65V±5%
2.05V±5% 1.25V±5%
SCOPE
Qx
VDD
VDDO
LVCMOS
GND
-1.25V±5%
SCOPE
Qx
3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
3.3V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
Phase Noise Plot
Phase Noise Mask
f1 Offset Frequency f2
RMS Jitter = Area Under the Masked Phase Noise Plot
V
DDO
Qx 2
V
DDO
Qy 2
t sk(o)
RMS PHASE JITTER
20%
Clock
Outputs
80%
tR
OUTPUT RISE/FALL TIME
840002BG-32
OUTPUT SKEW
80%
tF
20%
Q0, Q1
t PW
V
DDO
2
t
PERIOD
odc = t PW x 100%
t PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
www.icst.com/products/hiperclocks.html
REV. A JUNE 27, 2005
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ICS840002-32.PDF ] | |
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