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PDF ICS840031I Data sheet ( Hoja de datos )
| Número de pieza | ICS840031I | |
| 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 ICS840031I (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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Integrated
Circuit
Systems, Inc.
ICS840031I
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
GENERAL DESCRIPTION
ICS
The ICS840031I is an IEEE 1394b Clock
Generator and a member of the HiPerClocksTM
HiPerClockS™ family of high performance devices from ICS.
The ICS840031I uses a 24.576MHz crystal to
synthesize 98.304MHz. The ICS840031I has
excellent phase jitter performance, from 12KHz – 20MHz
integration range. The ICS840031I is packaged in a small
8-pin SOIC, making it ideal for use in systems with limited
www.DataSheebt4oUa.rcdomspace.
FEATURES
• (1) LVCMOS/LVTTL output
• Crystal oscillator interface designed for a 24.576MHz,
18pF parallel resonant crystal
• Output frequency: 98.304MHz (typical)
• VCO range: 490MHz to 640MHz
• RMS phase jitter @ 98.304MHz, using a 24.576MHz crystal
(12KHz - 20MHz): 0.75ps (typical)
• RMS phase noise at 98.304MHz (typical)
Offset
Noise Power
100Hz .............. -103.3 dBc/Hz
1KHz .............. -126.2 dBc/Hz
10KHz .............. -134.2 dBc/Hz
100KHz .............. -132.9 dBc/Hz
• 3.3V core/1.8V output operating supply
• Lead-Free fully RoHS compliant
• -40°C to 85°C ambient operating temperature
FREQUENCY TABLE
Inputs
Crystal Frequency (MHz)
24.576
Output Frequency
(MHz)
98.304
BLOCK DIAGRAM
(Pullup)
PLL_SEL
XTAL_IN
XTAL_OUT
OSC
Phase
Detector
VCO
589.824MHz w/
24.576MHz Ref.
M = ÷24 (fixed)
0
÷6 1
PIN ASSIGNMENT
VDD 1
8 VDDO
XTAL_OUT 2
7 Q0
XTAL_IN 3
6 GND
Q0
VDDA 4
5 PLL_SEL
ICS840031I
8-Lead SOIC
3.90mm x 4.90mm x 1.37mm package body
M Package
Top View
840031AMI
www.icst.com/products/hiperclocks.html
1
REV. A FEBRUARY 24, 2005
1 page  
Integrated
Circuit
Systems, Inc.
ICS840031I
FEMTOCLOCKS™CRYSTAL-TO-
LVCMOS/LVTTL CLOCK GENERATOR
PARAMETER MEASUREMENT INFORMATION
2.4±0.9V 0.9V±5%
VDD,
www.DataSheet4UV.cDoDAm VDDO
LVCMOS
GND
-0.9V±5%
SCOPE
Qx
Phase Noise Plot
Phase Noise Mask
f1 Offset Frequency f2
RMS Jitter = Area Under the Masked Phase Noise Plot
3.3V/1.8V OUTPUT LOAD AC TEST CIRCUIT
RMS PHASE JITTER
V
DD
Q0 2
Pulse Width
t
PERIOD
odc = t PW
t PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
20%
Clock
Outputs
80%
tR
80%
tF
20%
OUTPUT RISE/FALL TIME
840031AMI
www.icst.com/products/hiperclocks.html
5
REV. A FEBRUARY 24, 2005
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet ICS840031I.PDF ] | |
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