February 2007
rev 1.4
Pin Configuration (8-pin SOIC and TSSOP Packages)
ASM3P2531A
CLKIN
V
DD
V
SS
ModOUT
1
2
3
4
ASM3P2531A
8
7
6
5
NC
NC
NC
STOP
Spread Range Selection, V
DD
= 3.3 V
CLKIN frequency
27MHz – 55MHz
Spreading range
± 1.7%
Modulation rate
(CLKIN/1280) KHz
Pin Description
Pin#
1
2
3
4
Pin Name
CLKIN
V
DD
V
SS
ModOUT
Type
I
P
P
O
External reference frequency input.
Power supply for the entire chip.
Ground to entire chip.
Description
Spread spectrum clock output or reference output.( Refer Standby Mode Selection.)
5
6
7
8
STOP
NC
NC
NC
I
-
-
-
Active LOW signal. When HIGH, enables ModOUT and when LOW, ModOUT would be
LOW.
No connect.
No connect.
No connect.
Low Frequency EMI Reduction
Notice: The information in this document is subject to change without notice.
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PULSECORE [ PulseCore Semiconductor ]
