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PulseCore Semiconductor

PCS3I2191A Datasheet Preview

PCS3I2191A Datasheet

Spread Spectrum Clock Generator

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April 2007
PCS3P2191A
rev 0.2
Spread Spectrum Clock Generator
Features
Generates four 4X low EMI spread spectrum clocks
Input frequency: 15MHz
Output frequency: 60MHz
Internal loop filter minimizes external components
and board space
Selectable Centre Spread frequency deviation:
±0.5%, ±0.75%, ± 1.0%,
± 1.25%, ± 1.5%, ± 1.75% ± 2.0%
3.3V ± 0.3V Operating Voltage
Commercial and Industrial temperature range
16-pin TSSOP Package
Advanced low power CMOS process
output. PCS3P2191A offers seven sewlewctwab.DleatacSehneteret4U.com
spread options of ±0.5% to ±2.0%, and a no spread
option. (Refer Spread Deviation Selection Table).
PCS3P2191A reduces electromagnetic interference
(EMI) at the clock source, allowing system wide reduction
of EMI of all clock dependent signals. The PCS3P2191A
allows significant system cost savings by reducing the
number of circuit board layers, ferrite beads, and
shielding that are traditionally required to pass EMI
regulations. The PCS3P2191A uses the most efficient
and optimized modulation profile approved by the FCC
and is implemented in a proprietary all digital method.
The Device is available in 16 Pin TSSOP package, in
Commercial and Industrial temperature range.
Product Description
Application
PCS3P2191A is a versatile spread spectrum frequency
modulator that generates four low EMI 4x clocks at the
PCS3P2191A is targetted for LCD panel application
Block Diagram
S2 S1 S0
VDD
2
CLKIN / XIN
XOUT
Crystal
Oscillator
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
PLL
VCO
Output
Divider
ModOUT
4
5
GND
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.




PulseCore Semiconductor

PCS3I2191A Datasheet Preview

PCS3I2191A Datasheet

Spread Spectrum Clock Generator

No Preview Available !

April 2007
rev 0.2
Pin Configuration
VDD 1
GND 2
S2 3
GND 4
CLK1 5
CLK2
GND
6
7
XIN/CLKIN 8
PCS3P2191A
16Pin TSSOP
16 S0
15 VDD
14 S1
13 GND
12 CLK4
11 GND
10 CLK3
9 XOUT
PCS3P2191A
www.DataSheet4U.com
Pin Description
Pin#
1
2
3
4
5
6
7
Pin Name
VDD
GND
S2
GND
CLK1
CLK2
GND
8 XIN/CLKIN
9 XOUT
10 GND
11 CLK3
12 CLK4
13 GND
14 S1
15 S0
16 VDD
Type
power
power
Input
power
Output
Output
power
Input
Output
power
Output
Output
power
Output
Output
power
Description
Power Supply Voltage Pin. Connect to +3.3V.
Ground Connection. Connect to system ground.
Spread range select. Digital logic input used to select frequency deviation
(Refer Spread Deviation Table). This pin has an internal pull-up resistor.
Ground Connection. Connect to system ground.
Low EMI 4x clock output.
Low EMI 4x clock output.
Ground Connection. Connect to system ground.
Crystal connection or external reference frequency input. It can be connected to a
15MHz fundamental mode crystal.
Crystal connection. If using an external reference, this pin must be left
unconnected.
Ground Connection. Connect to system ground.
Low EMI 4x clock output.
Low EMI 4x clock output.
Ground Connection. Connect to system ground.
Spread range select. Digital logic input used to select frequency deviation
(Refer Spread Deviation Table). This pin has an internal pull-up resistor.
Spread range select. Digital logic input used to select frequency deviation
(Refer Spread Deviation Table). This pin has an internal pull-up resistor.
Power Supply Voltage Pin. Connect to +3.3V.
Spread Spectrum Clock Generator
Notice: The information in this document is subject to change without notice.
2 of 8


Part Number PCS3I2191A
Description Spread Spectrum Clock Generator
Maker PulseCore Semiconductor
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PCS3I2191A Datasheet PDF






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