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PDF ICS650-41 Data sheet ( Hoja de datos )
| Número de pieza | ICS650-41 | |
| Descripción | Spread Spectrum Clock Synthesizer | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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ICS650-41
Spread Spectrum Clock Synthesizer
Description
The ICS650-41 is a spread spectrum clock synthesizer
intended for video projector applications. It generates
an EMI optimized 50 MHz clock signal (EMI peak
reduction of 7 to 14 dB on 3rd through 19th harmonics)
through the use of Spread Spectrum techniques from a
25 MHz crystal or clock input. For the 50 MHz output,
the modulation rate is 50 kHz.
In addition to the EMI optimized clock signal, the device
generates a 48 MHz clock for USB.
Features
• Packaged in 16-pin TSSOP (173 mil)
• Supply voltages: VDD = 3.3 V, VDDO = 2.5 V
• Peak-to-peak jitter: ±125 ps typ
• Output duty cycle 45/55% (worst case)
• Guarantees +85°C operational condition
• 25 MHz crystal or reference clock input
• Zero (0) ppm frequency error on all output clocks
• Advanced, low-power CMOS process
• Industrial temperature range
Block Diagram
25 MHz crystal
or clock input
X1/CLKIN
X2
External capacitors are
required with a crystal
input.
FS3:0
SS_EN
Crystal
OSC
VDD
3
VDDO
PLL1 with
Spread
Spectrum
Control
Logic
PLL2
GND 2
PDTS
50M
48M
MDS 650-41 F
1
Revision 082305
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
1 page  
ICS650-41
Spread Spectrum Clock Synthesizer
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS650-41. These ratings,
which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of
the device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Supply Voltage, VDD
All Inputs and Outputs
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Soldering Temperature (max. of 10 seconds)
Rating
7V
-0.5 V to VDD+0.5 V
0 to +85°C
-65 to +150°C
125°C
260°C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
Power Supply Voltage (VDDO)
Power Supply Ramp Time, Figure 4
Min.
0
+3.135
+2.375
Typ.
–
+3.3
+2.5
Max.
+85
+3.465
+2.625
4
Units
°C
V
V
ms
MDS 650-41 F
5
Revision 082305
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
5 Page 
ICS650-41
Spread Spectrum Clock Synthesizer
Revision History
Rev.
B
C
D
E
Originator
P.Griffith
P. Griffith
P. Griffith
P. Griffith
Date Description of Change
10/07/04 Changed the input frequency from 14.31818 to 25 MHz; changed Short Circuit Current
from ±70 to ±50; added separate Pull-up resistor spec for SS_EN; added “I” to part
ordering number
11/15/04
12/06/04
Changed AC and DC parameters to reflect measured char values: IDD, IDDO, VIH, VIL,
RPU, II, RPD, t1,.t2, t3, t4, tja, tEN, tDIS, tP. Added Figures for key parameters.
Changed jitter spec to +/-150 ps and duty cycle to 45% min, 55% max.
1/17/05
Renamed pin 1 to X1/CLKin on page2, improved jitter spec to +/-125 ps on front page and
in electrical tables, changed rise and fall time to 1.5 ns typical to reflect balanced drive,
changed typical ID spec to 4 ma, updated graphs on page 8 to reflect separate VDDO and
correct bypass capacitor value, updated marking diagram and ordering table to reflect
Pb-free device.
MDS 650-41 F
11
Revision 082305
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ICS650-41.PDF ] | |
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