CY28158 - Spread Spectrum Timing Solution for Serverworks Chipset

Cypress Semiconductor

CY28158 Datasheet Preview — Preview of CY28158 PDF

Datasheet Details

Part number	CY28158
Manufacturer	Cypress Semiconductor
File Size	220.13 KB
Description	Spread Spectrum Timing Solution for Serverworks Chipset
Datasheet	CY28158_CypressSemiconductor.pdf

CY28158 Product details

Description

Reference crystal input Reference crystal feedback CPU clock outputs PCI clock outputs, synchronously running at 33.33 MHz Free running PCI clock 3V66 clock outputs, running at 66.66 MHz IOAPIC clock outputs, running at 16.67 MHz Reference clock outputs, 14.318 MHz 48-MHz USB clock output Active LOW input, disables CPU and 3V66 clocks when asserted Active LOW input, disables PCI clocks when asserted Active LOW input, powers down part when asserted Active LOW input, enables spread spectrum when a

Features

Maximized EMI suppression using Cypress’s spread spectrum technology.
Based on Industry Standard CK133 Pinout with all outputs compliant to CK98 specifications.
0.5% downspread outputs deliver up to 10dB lower EMI.
6 skew-controlled copies of CPU output.
6 copies of PCI output (synchronous w/CPU output).
2 copies of 66 MHz fixed frequency 3.3V clock.
3 copies of 16.67 MHz IOAPIC clock, synchronous to CPU clock.
1 copy of 48.

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Published: Mar 26, 2005 |