CY25901
Features
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- Supports clock requirements for Spread Spectrum 40-MHz Spread Spectrum clock output Reference clock output Two spread bandwidths: 1%, 3% External clock or Cera-Lock input 3.3V operation 8-pin SOIC package
Description
The CY25901 clock generator provides a low-electromagnetic interference (EMI) clock output. It features
Spread Spectrum technology, a modulation technique designed specifically for reducing EMI at the fundamental frequency and its harmonics.
Table 1. Function Table CLKOUT (Spread Spectrum) SSSEL 0 1 X (don’t care) SSON 0 0 1 REFOUT XIN XIN XIN CY25901SC = XIN ± 0.35% (0.7% center) = XIN ± 1.20% (2.4% center) = XIN (No Spread) CY25901SC-1 = XIN ± 0.5% (1.0% center) = XIN ± 1.5% (3.0% center) = XIN (No Spread)
Block Diagram
Pin Configuration
XIN Oscillator XOUT
REFOUT
CLKOUT VDD VSS XIN
1 2 3 4
8 7 6 5
SSON# REFOUT SSSEL XOUT
SSON SSSEL
PLL CLKOUT SSCG
Cypress Semiconductor Corporation Document #: 38-07521 Rev.
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- 3901 North First...
