Cypress Semiconductor W180-52G PLL Frequency Synthesizer Single 8-Pin SOIC
$4.00
W180-52G Cypress Semiconductor EMI Reduction 3.3V±5% or VDD = 5V±10% Frequency Range: 8 MHz Fin 28 MHz Cycle to Cycle
Description
Cypress – Peak Reducing EMI Solution W180-52G
The W180 uses a phase-locked loop (PLL) to frequency modulate an input clock. The result is an output clock whose frequency is slowly swept over a narrow band near the input signal. The basic circuit topology is shown in Figure 1. The input reference signal is divided by Q and fed to the phase detector. A signal from the VCO is divided by P and fed back to the phase detector also. The PLL will force the frequency of the VCO output signal to change until the divided output signal and the divided reference signal match at the phase detector input. The output frequency is then equal to the ratio of P/Q times the reference frequency. (Note: For the W180 the output frequency is equal to the input frequency.) The unique feature of the Spread Spectrum Frequency Timing Generator is that a modulating waveform is superimposed at the input to the VCO. This causes the VCO output to be slowly swept across a predetermined frequency band.
Manufacturer Part Number: W180-52G
Manufacturer: Cypress
Datasheet: PCN040131.pdf
Additional information
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