參數(shù)資料
型號(hào)： FS787BZ
英文描述： MISCELLANEOUS CLOCK GENERATOR|SOP|8PIN|PLASTIC
中文描述： 雜項(xiàng)時(shí)鐘發(fā)生器|?？苵 8引腳|塑料
文件頁(yè)數(shù)： 3/13頁(yè)
文件大?。?/td> 94K
代理商： FS787BZ
Low EMI Spread Spectrum Clock
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress
Document#: 38-07031 Rev. **
05/04/2001
Page 3 of 13
APPROVED
PRODUCT
FS786/787
Pin Configuration
Refer to page 11 for package dimensions.
Pin Description
Pin No.
1/2
Pin Name
Xin / Xout
I/O
I/O
TYPE
Analog
Description
Pins form an on-chip reference oscillator when connected to
terminals of an external parallel resonant crystal. Xin may be
connected to TTL/CMOS external clock source. If Xin
connected to external clock other than crystal, leave Xout (pin 2)
unconnected.
Input frequency range selection. Has internal pull-up resistor.
FS786
0 = 16
–
32 MHz, 1 = 64
–
82 MHz.
FS787
0 = 6
–
14 MHz, 1 = 34
–
62 MHz.
Loop Filter. Single ended tri-state output of the phase detector. A
passive RC filter is connected to the Loop Filter pin (LF).
Power Supply Ground.
Non-Modulated Clock Output of Reference Oscillator.
Modulated Clock Output of Reference Oscillator. Frequency is
center spread and 1X of reference clock.
Positive Power Supply.
3
D0
I
CMOS/TTL
4
LF
I
Analog
5
6
7
VSS
P
O
O
Power
CMOS/TTL
CMOS/TTL
REFOUT
FSOUT
8
VDD
P
Power
Table 1. Pin Description
Output Frequency Selection
Product Number
FS786
FS787
FSOUT Frequency Scaling
1x
1x
Description
1X Modulated Clock + 1X Non-Modulated Clock
1X Modulated Clock + 1X Non-Modulated Clock
Table 2. FSOUT SSCG (Modulated Output Clock) Product Selection
1
2
3
4
8
7
6
5
Xin
Xout
LF
VDD
FSOUT
VSS
FS786/787
D0
REFOUT
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