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參數(shù)資料
| 型號： | C9914BY |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| 封裝： | SSOP-28 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 131K |
| 代理商： | C9914BY |
Clock Generator for 100MHz and 133.3MHz Mobile Applications
Cypress Semiconductor Corporation
525 Los Coches St.
Document#: 38-07069 Rev. **
5/4/2001
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
Page 5 of 14
http://www.cypress.com
PRELIMINARY
C9914
Strapping Resistor Options for pins with internal
Pull-ups:
The power up bidirectional pins have a large value pull-
up each (250K
), therefore, a selection “1” is the
default. If the system uses a slow power supply (over
3mS settling time), then it is recommended to use an
external Pullup (Rup)
in order to insure a high
selection. In this case, the designer may choose one of
two configurations, see Fig. 3A and Fig. 3B.
Fig. 3A represents an additional pull up resistor 50K
connected from the pin to the power line, which allows a
faster pull to a high level.
If a selection “0” is desired, then a jumper is placed on
JP1 to a 5K
resistor as implemented as shown in
Fig.3A. Please note the selection resistors (Rup, and
Rdn
) are placed before the Damping resistor (Rd)
close to the pin.
Fig. 3B represent a single resistor 10K
connected to a
3 way jumper, JP2. When a “1” selection is desired, a
jumper is placed between leads1 and 3. When a “0”
selection is desired, a jumper is placed between leads 1
and 2.
Load
Fig.3A
Fig.3B
Vdd
Rup
50K
Rd
IMI C9914
Bidirectional
JP1
JUMPER
JP2
3 Way Jumper
Rsel
10K
Rd
IMI C9914
Bidirectional
Rdn
5K
Spectrum Spread Clocking
Spectrum Analysis
Spread
Non -Spread
Reduction
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