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PDF ICS650-47 Data sheet ( Hoja de datos )
| Número de pieza | ICS650-47 | |
| Descripción | Spread Spectrum Clock Synthesizer | |
| Fabricantes | Integrated Circuit Systems | |
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P R E L I M I N A RY I N F O R M AT I O N
ICS650-47
Spread Spectrum Clock Synthesizer
Description
The ICS650-47 is a spread spectrum clock synthesizer
intended for video projector applications. It generates
an EMI optimized 50 MHz clock signal 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.
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 (0 to +85°C)
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
PLL with
Spread
Spectrum
50M
Control
Logic
2
GND
PDTS
MDS 650-47 B
1
Revision 082305
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
1 page  
P R E L I M I N A RY I N F O R M AT I O N
ICS650-47
Spread Spectrum Clock Synthesizer
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, VDDO = 2.5 V ±5% , Ambient Temperature 0 to +85°C
Parameter
Symbol
Conditions
Min. Typ. Max. Units
no load
IDD
27 mA
Operating Supply Current
IDDO
PDTS = 0, no load
no load
PDTS = 0, no load
40 µA
4 mA
1 µA
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Short Circuit Current
Nominal Output
Impedance
VIH FS3:0, PDTS, SS_EN
VIL FS3:0, PDTS, SS_EN
VIH X1/CLKIN
VIL X1/CLKIN
VOH IOH = -4 mA
VOL IOL = 4 mA
IOS
ZO
2V
0.8 V
0.7 x VDD
V
0.3 x VDD V
1.8 V
0.6 V
±50 mA
20 Ω
Internal Pull-up Resistor
Input Leakage Current
RPU FS3:0, PDTS, SS_EN
II FS3:0, PDTS, SS_EN,
VIN=VDD
360 kΩ
1 µA
Internal Pull-down
Resistor
RPD CLK output
900 kΩ
Input Capacitance
CIN Inputs
4 pF
MDS 650-47 B
5
Revision 082305
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ICS650-47.PDF ] | |
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