參數(shù)資料
型號(hào): FS784BZB
英文描述: MISCELLANEOUS CLOCK GENERATOR|SOP|8PIN|PLASTIC
中文描述: 雜項(xiàng)時(shí)鐘發(fā)生器|專(zhuān)科| 8引腳|塑料
文件頁(yè)數(shù): 11/13頁(yè)
文件大?。?/td> 103K
代理商: FS784BZB
LOW EMI SPECTRUM SPREAD CLOCK
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07029 Rev. **
05/07/2001
Page 11 of 13
APPROVED
PRODUCT
FS781/82/84
Application Notes and Schematic
The schematic at the right is configured for the following parameters;
Package selected = FS781
Xin = 20 MHz Crystal
FSOUT = 20 MHz (S0=1 and S1=0)
Bandwidth of the FSOUT clock is
determined by the values of the loop
filter connected to pin 4.
**
** Occasionally, C8 is used to
create a second pole for this loop
filter. Refer to Loop Filter Selection
table.
.
Mount loop filter components as
close to LF pin as possible.
Crystal is 20 MHz is 1st Order
with 18 pF load capacitance.
If Crystal load capacitance is
different than 18 pF, C1 and C2
must be re-calculated.
For third overtone crystals, a
parallel or series resonant trap
is required.
R6
C1
0.1 uF
C2
27 pF
C3
27 pF
Y1
20 MHz
C8
C7
FS781
Xin
1
Xout
2
S1
3
LF
4
VSS
5
FSOUT
6
S0
7
VDD
8
VDD
FSOUT
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