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CY26121

Part Number	CY26121
Manufacturer	Cypress Semiconductor
Description	Spread Spectrum Clock Generator
Published	Apr 15, 2011
Detailed Description	CY26121 PacketClock™ Spread Spectrum Clock Generator Features ■ ■ ■ ■ ■ ■ Benefits ■ ■ ■ ■ ■ Integrated phase-locked ...
Datasheet	CY26121 PDF File

Overview

CY26121 PacketClock™ Spread Spectrum Clock Generator Features ■ ■ ■ ■ ■ ■ Benefits ■ ■ ■ ■ ■ Integrated phase-locked loop (PLL) Low jitter, high-accuracy outputs 3.
3V operation 25-MHz input frequency 66.
66-MHz or 33.
33-MHz selectable output frequency (orig, -3,-11,-31) 33.
33-MHz or 25-MHz selectable output frequency (-2,-21) High-performance PLL tailored for Spread Spectrum application Meets critical timing requirements in complex system designs Enables application compatibility Works with commonly available crystal or driven reference Downspread Spread Spectrum with 30-kHz nominal modulation frequency Table 1.
Frequency Table for CLKA-D Part Number CY26121 CY26121-2 CY26121-3 CY26121-11 CY26121-21 CY26121-31 CLKSEL=0 66.
66 MHz 33.
33 MHz 66.
66 MHz 66.
66 MHz 33.
33 MHz 66.
66 MHz CLKSEL=1 33.
33 25.
00 33.
33 33.
33 25.
00 33.
33 Spread% –2.
8% –2.
8% –1.
4% –2.
8% –2.
8% –1.
4% Parallel Crystal Load 6 pF 6 pF 6 pF 15 pF 15 pF 15 pF Logic Block Diagram VDDL 25 MHz XIN XOUT OSC.
PLL with Modula...

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