Cypress Semiconductor CY25566 Fiche technique

Parcourez en ligne ou téléchargez le pdf Fiche technique pour {nom_de_la_catégorie} Cypress Semiconductor CY25566. Cypress Semiconductor CY25566 9 pages. Cypress spread spectrum clock generator specification sheet

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Features
• 25- to 200-MHz operating frequency range
• Wide range of spread selections (9)
• Accepts clock or crystal inputs
• Provides four clocks
— SSCLK1a
— SSCLK1b
— SSCLK2
— REFOUT
• Low-power dissipation
— 3.3V = 70 mW (typical @ 40 MHz, no load)

Block Diagram

300K
Xin/
1
CLK
Xout
16
VDD
4
VSS
5
11
VSS
14
VSS
10
SSCC
Cypress Semiconductor Corporation
Document #: 38-07429 Rev. *B
Spread Spectrum Clock Generator
REFERENCE
DIVIDER
PD
CP
MODULATION
FEEDBACK
CONTROL
DIVIDER
INPUT
DECODER
LOGIC
VDD
VDD
20 K
20 K
RANGE
CONTROL
20 K
20 K
VSS
VSS
6
12
13
7
S1
S0
S2
S3
•
3901 North First Street
• Center spread modulation
• Low cycle-to cycle jitter
• 16-pin SOIC package
Applications
• High-resolution VGA controllers
• LCD panels and monitors
• Printers and MFPs
Benefits
• Peak EMI reduction by 8 to 16 dB
• Fast time to market
• Cost reduction
Pin Configuration
REFOFF
2
XIN/CLKIN
3
REFOUT
Loop
Filter
vco
SSCLK1a
DIVIDER
&
8
SSCLK1a
MUX
9
SSCLK1b
/2
15
SSCLK2
•
San Jose
CY25566
1
16
XOUT
REFOFF
2
15
SSCLK2
REFOUT
3
14
VSS
VDD
4
13
S0
VSS
5
12
S1
S2
6
11
VSS
S3
7
10
SSCC
8
9
SSCLK1b
•
CA 95134
•
408-943-2600
Revised October 26, 2005
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