November 2006
ASM3P2872A
rev 1.7
Pin Configuration (8-pin SOIC and TSSOP Packages)
XIN/CLKIN
XOUT
1
2
3
4
8
7
6
5
VDD
NC
ASM3P2872A
ModOUT
REFOUT
NC
VSS
Pin Description
Pin# Pin Name Type
Description
Crystal connection or external reference frequency input. This pin has dual functions. It
1
XIN/CLKIN
I
can be connected either to an external crystal or an external reference clock.
2
3
4
5
6
7
8
XOUT
REFOUT
NC
O
O
-
Crystal connection. If using an external reference, this pin must be left unconnected.
Buffered output of the input frequency.
No connect.
VSS
P
O
-
Ground connection.
ModOUT
NC
Spread spectrum clock output.
No connect.
VDD
P
Power supply for the entire chip
Modulation Profile
Specifications
Description
For 2.5V Supply
For 3.3V Supply
Specification
13MHz < CLKIN < 30MHz
13MHz < CLKIN < 30MHz
Frequency Range
Modulation Equation
Frequency Deviation
FIN/640
-1.25% @ 22MHz
Low Power Peak EMI Reducing Solution
3 of 12
Notice: The information in this document is subject to change without notice.
PULSECORE [ PulseCore Semiconductor ]
