參數資料
型號: ASM3P2180A-08TR
廠商: ALLIANCE SEMICONDUCTOR CORP
元件分類: XO, clock
英文描述: Peak Reducing EMI Solution
中文描述: 30 MHz, OTHER CLOCK GENERATOR, PDSO8
封裝: TSSOP-8
文件頁數: 2/7頁
文件大?。?/td> 202K
代理商: ASM3P2180A-08TR
Peak Reducing EMI Solution
2 of 7
September 2004
rev 1.0
Pin Diagram
Modulation Width Selection
ASM3P2180A
Notice: The information in this document is subject to change without notice.
SS%
Output
0
FIN
FOUT
FIN – 1.25%
FIN
FOUT
FIN – 2.4%
1
Frequency Range Selection
FS1
Modulation Rate
6
FIN
10
18
FIN
30
0
1
Pin Description
Pin#
Pin Name
Type
Description
1
CLKIN / X1
I
Crystal connection or external reference frequency input. This pin has
dual functions. It can be connected to either an external crystal or an
external reference clock.
Crystal connection. Connection for an external crystal. If using an
external reference, this pin must be left unconnected.
2
NC / X2
O
3
GND
P
Ground to entire chip.
4
SS%
I
Modulation width selection. When spread spectrum feature is turned
on, this pin is used to select the amount of variation and peak EMI
reduction that is desired on the output signal. Internal pull-up resistor.
5
CLKOUT
O
Output modulated frequency. Copy of the un-modulated input clock.
6
VDD
P
Power supply for the entire chip (3.3V).
7
FS1
I
Frequency selection bit 1. This pin selects the frequency range of
operation. (
Refer to the Frequency Range Selection Table
). This pin
has an internal pull-up resistor.
8
NC
-
No connect.
CLKOUT
NC
VDD
FS1
1
2
3
4
5
6
7
8
CLKIN / X1
NC / X2
GND
SS%
ASM3P2180A
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