January 2007
rev 1.1
Pin Configuration (8-pin SOIC and TSSOP Packages)
ASM3P2579A
XIN/CLKIN
XOUT
SSON
1
2
3
8
7
6
5
VDD
NC
ModOUT
VSS
ASM3P2579A
NC
4
Pin Description
Pin#
1
2
3
4
5
6
7
8
Pin Name
XIN/CLKIN
XOUT
Type
I
O
I
-
P
O
-
P
Description
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.
When SSON is HIGH, the spread spectrum is enabled and when LOW, it turns off the
spread spectrum. Connect the pin to ground When Spread Spectrum feature is not
required.
No connect.
Ground connection.
Spread spectrum clock output.
No connect.
Power supply for the entire chip
SSON
NC
VSS
ModOUT
NC
VDD
Modulation Profile
Specifications
Description
Frequency Range
Modulation Equation
Frequency Deviation
Specification
12MHz < CLKIN < 30MHz
F
IN
/640
±1% @ 24MHz
Low Power Peak EMI Reducing Solution
Notice: The information in this document is subject to change without notice.
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PULSECORE [ PulseCore Semiconductor ]
