W158 Datasheet - Cypress Semiconductor

W158 Spread Spectrum System Frequency Synthesizer

41, 42, 45, 46 O CPU Clock Outputs 0 through 3: These four CPU clocks run at a frequency set by SEL133/100#. Output voltage swing is set by the voltage applied to VDDQ2. CPUdiv2_ 0:1 49, 50 O Synchronous Memory Reference Clock Output 0 through 1: Reference clock for Direct RDRAM clock generators run.

W158 Features

* Maximized EMI suppression using Cypress’s spread spectrum technology

* Intel® CK98 Specification compliant

* 0.5% downspread outputs deliver up to 10 dB lower EMI

* Four skew-controlled copies of CPU output

* Eight copies of PCI output (synchronous w/CPU out

W158 Datasheet (166.08 KB)