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I2779A डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Low-Cost Notebook EMI Reduction IC - ETC

भाग संख्या I2779A
समारोह Low-Cost Notebook EMI Reduction IC
मैन्युफैक्चरर्स ETC 
लोगो ETC लोगो 
पूर्व दर्शन
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<?=I2779A?> डेटा पत्रक पीडीएफ

I2779A pdf
P2779A
®
Pin Description
Pin #
1
2
3
Name
XIN/CLKIN
XOUT
PD
Type
I
I
I
4 LF I
5 VSS P
6 ModOUT O
7 REF O
8 VDD P
1. Connect to VDD if not used.
Description
Connect to crystal or clock input.
Crystal output.
Power-down control pin. Pull low to enable power-down mode. This pin has an
internal pull-up resistor.1
External loop filter for the PLL. By changing the value of the CRC circuit, the
percentage spread can be adjusted accordingly. (See Loop Filter Selection
Table for detail value.)
Ground connection. Connect to system ground.
Spread Spectrum clock output.
Provides a reference clock output of the input frequency.
Connect to +3.3 V.
Loop Filter Selection Table VDD 3.3 V
R1
Pin 4 LF
C2 C1
BW = ± 0.50%
BW = ± 0.75%
BW = ± 1.00%
BW = ± 1.25%
Input
(MHz)
FS1
FS0
C1
C2
R1 C1 C2
R1 C1 C2
R1 C1 C2
R1
(pF) (pF) (ohms) (pF) (pF) (ohms) (pF) (pF) (ohms) (pF) (pF) (ohms)
20
21 - 22
23 - 24
25 - 26
27 - 28
29 - 30
31 - 32
33 - 34
35 - 36
37 - 38
1
1
1
1
1
1
1
1
1
1
0 270 100,000 330 270 100,000 560 270 100,000 750 560 100,000 910
0 270 100,000 390 270 100,000 620 270 100,000 866(1%) 560 100,000 1,100
0 270 100,000 510 270 100,000 750 270 10,000 1,000 680 6,800 1,200
0 270 100,000 560 270 100,000 820 270 12,000 1,200 470 4,700 1,200
0 270 100,000 620 270 100,000 1,000 270 6,800 1,200 330 3,300 1,200
0 270 100,000 750 270 100,000 1,100 270 3,900 1,200 330 3,300 1,500
0 270 100,000 820 270 100,000 1,200 270 12,000 2,200 680 6,800 2,200
0 270 100,000 910 270 100,000 1,300 270 10,000 2,200 390 3,900 2,200
0 270 100,000 1,000 270 100,000 1,500 270 5,600 2,200 270 2,700 2,200
0 270 100,000 1,200 270 100,000 1,600 270 3,300 2,200 270 2,700 2,700
Plese contact factory for loop filter values if desired spread settings are not listed.
February 2003
Low-Cost Notebook EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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शेयर लिंक


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भाग संख्याविवरणविनिर्माण
I2779ALow-Cost Notebook EMI Reduction ICETC
ETC


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