PCS3P2189A PulseCore Semiconductor, PCS3P2189A Datasheet - Page 2

• Manufacturer Part Number: PCS3P2189A
• Description: Spread Spectrum Clock Generator
• Manufacturer: PulseCore Semiconductor

Pin Description
September 2006
rev 0.1
Pin Configurations
Spread Deviation Selection Table
Modulation Enable Setting Table
Pin#
1
2
3
4
5
6
7
8
S1
0
0
1
1
CLKIN / XIN
SSON
Pin Name
ModOUT
XOUT
SSON
H
L
VDD
VSS
S1
S0
S0
0
1
0
1
Type
O
O
O
P
P
I
I
I
Notice: The information in this document is subject to change without notice.
Spread Spectrum Clock Generator
CLKIN / XIN
No Modulation
Modulation
Crystal connection or external reference frequency input. This pin has dual
functions. It can be connected either to an external crystal or an external reference
clock.
Crystal connection. If using an external reference, this pin must be left
unconnected.
Modulation enables pin. When HIGH enables spread spectrum modulation. 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.
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.
Power Supply Voltage Pin. Connect to +3.3V.
Modulation
Deviation
XOUT
SSON
± 0.5%
± 1.0%
± 1.5%
± 2.0%
S1
1
2
4
3
PCS3P2189A
8
7
5
6
Description
S0
VDD
VSS
ModOUT
PCS3P2189A
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