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Número de pieza | ICS181-53 | |
Descripción | Low EMI Clock Generator | |
Fabricantes | Integrated Circuit Systems | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de ICS181-53 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
No Preview Available ! ICS181-53
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Description
The ICS181-53 generates a low EMI output clock from
a clock or crystal input. The device uses ICS’
proprietary mix of analog and digital Phase Locked
Loop (PLL) technology to spread the frequency
spectrum of the output, thereby reducing the frequency
amplitude peaks by several dB.
The ICS181-53 offers center spread selection of
+/-0.625% and +/-1.875%. Refer to the MK1714-01/02
for the widest selection of input frequencies and
multipliers.
ICS offers a complete line of EMI reducing clock
generators. Consult us when you need to remove
crystals and oscillators from your board.
Features
• Pin and function compatible to Cypress W181-53
• Packaged in 8-pin SOIC
• Provides a spread spectrum output clock
• Accepts a clock input and provides same frequency
dithered output
• Input frequency of 46 to 75 MHz for Clock input
• Peak reduction by 7dB - 14dB typical on 3rd - 19th
odd harmonics
• Spread percentage selection for +/-0.625% and
+/-1.875%
• Operating voltage of 3.3 V and 5 V
• Advanced, low-power CMOS process
Block Diagram
VDD
FS1
SSON#
SS%
CLKIN
Clock Buffer
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
CLK
GND
MDS 181-53 A
1
Revision 110404
Integrated Circuit Systemsl525 Race Street, San Jose, CA 95126 l tel (408) 297-1201 l www.icst.com
1 page ICS181-53
LOW EMI CLOCK GENERATOR
www.DataSheet4U.com
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V±5% or 5 V±10%, Ambient Temperature 0 to +70° C, CL=15 pf
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Input/Output Clock Frequency
46 75 MHz
Input Clock Duty Cycle
Time above VDD/2
40
60 %
Output Clock Duty Cycle
Note 1
40 50 60 %
Output Rise Time
Output Fall Time
Jitter
tOR 0.8 to 2.4 V, note 1
tOF 2.4 to 0.8 V, note 1
Cycle-to-cycle
2 5 ns
2 5 ns
250 300 ps
Note 1: Measured with 15 pF load
Thermal Characteristics
Parameter
Symbol Conditions Min. Typ. Max. Units
Thermal Resistance Junction to
Ambient
θJA Still air
θJA 1 m/s air flow
θJA 3 m/s air flow
Thermal Resistance Junction to Case θJC
150 °C/W
140 °C/W
120 °C/W
40 °C/W
Marking Diagram
85
Notes:
1. ###### is the lot number.
181M-53
######
YYWW
2. YYWW is the last two digits of the year and week
that the part was assembled.
3. “LF” denotes Pb (lead) free package.
4. Bottom marking: country of origin.
14
Marking Diagram (Pb free)
85
181M53LF
######
YYWW
14
MDS 181-53 A
5
Revision 110404
Integrated Circuit Systemsl 525 Race Street, San Jose, CA 95126 l tel (408) 297-1201l www.icst.com
5 Page |
Páginas | Total 6 Páginas | |
PDF Descargar | [ Datasheet ICS181-53.PDF ] |
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