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