SM560 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – Spread Spectrum Clock Generator

Features
• 25- to 108-MHz operating frequency range
• Wide (9) range of spread selections
• Accepts clock and crystal inputs
• Low power dissipation
• 3.3V = 85 mw (50 MHz)
• Frequency Spread disable function
• Center Spread modulation
• Low cycle-to cycle jitter
• Eight-pin SOIC package
SM560
Spread Spectrum Clock Generator
Applications
• VGA controllers
• LCD panels and monitors
• Printers and multi-function devices (MFP)
Benefits
• Peak electromagnetic interference (EMI) reduction
by 8 to 16 dB
• Fast time to market
• Cost reduction
Block Diagram
250 K
Xin/ ₁
CLK
4 pf
Xout ⁸
8 pF
VDD ²
VSS 3
REFERENCE
DIVIDER
MODULATION
CONTROL
INPUT
DECODER
LOGIC
5
SSCC
6
7
S1 S0
Pin Configuration
PD CP
FEEDBACK
DIVIDER
LF
VCO
Xin/CLK 1
VDD
2
VSS
3
SSCLK
4
DIVIDER
AND MUX
4 SSCLK
8 Xout
7 S0
6 S1
5 SSCC
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-07020 Rev. *E
Revised June 25, 2004