CY28158OXCT

CY28158OXCT Datasheet


CY28158

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CY28158OXCT CY28158OXCT CY28158OXCT (pdf)
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CY28158OXC CY28158OXC CY28158OXC
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CY28158

Spread Spectrum Timing Solution for Serverworks Chipset
• Maximized EMI suppression using Cypress’s spread spectrum technology
• Based on Industry Standard CK133 Pinout with all outputs compliant to CK98 specifications
• 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 MHz IOAPIC clock, synchronous to

CPU clock
• 1 copy of 48 MHz USB output
• 2 copies of MHz reference clock
• Programmable to 133 or 100 MHz operation
• Power management control pins for clock stop and
shut down
• Available in 56-pin SSOP

Key Specifications

Supply VDD33 = 3.3V ± 5% VDD25 = 2.5V ± 5% CPU Output Jitter ps

CPU Output Skew ps

CPU to 3V66 Output Offset:
to1.5 ns CPU leads

CPU to IOAPIC Output Offset to ns CPU leads

CPU to PCI Output Offset................. 0 to ns CPU leads

Table Pin Selectable Frequency.

SEL133/100#

CPU0:5 MHz

Block Diagram

X1 X2

CPU_STOP#

XTAL OSC
2 REF0:1

STOP Clock Logic
6 CPU0:5

SPREAD# SEL0 SEL1

SEL133/100#

PWRDWN# PCI_STOP#

PLL 1

Power Down Logic

STOP Clock Logic

STOP

Clock

Logic
2 3V66_0:1
1 PCI_F
5 PCI1:5
3 IOAPIC0:2

Tristate Logic

PLL2
1 48MHz

Pin Configuration
Ordering Information
Ordering Code CY28158PVC CY28158PVCT Lead Free CY28158OXC CY28158OXCT

Package Name O56

Package Type 56-Pin SSOP 56-Pin SSOP- Tape and Reel
56-Pin SSOP
56-Pin SSOP- Tape and Reel

Operating Range Commercial

Commercial

Page 8 of 10

Package Diagram
56-Lead Shrunk Small Outline Package O56

CY28158
51-85062-C

Page 9 of 10

Cypress Semiconductor Corporation, The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

CY28158

Document Title CY28158 Spread Spectrum Timing Solution for Serverworks Chipset Document Number 38-07039

Issue ECN NO. Date

Orig. of Change Description of Change
107005 08/08/01 IKA

New Data Sheet
122732 12/16/02 RBI

Added power-up requirements to operating conditions information.
237871 See ECN RGL

Added Lead Free Devices

Page 10 of 10
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Datasheet ID: CY28158OXCT 507718