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Part Number: C9851
Description: This device provides the necessary clocks for a differential host bus system in multi-processor servers and workstation...
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C9851
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DataSheet
General Description
C9851 General Description
This device provides the necessary clocks for a differential host bus system in multi-processor servers and workstations. It also generates a 66.6MHz hub clock for interfacing with a complimentary part, the Cypress B9852. The 2 Mref clock outputs are 180 degrees out of phase and are used for interfacing with the Direct Rambus Clock Generator (DRCG), C9820,C9821, or C9822. This device integrates the Cypress spread spectrum technology for optimum EMI reduction.
C9851 Maximum Ratings
Maximum Input Voltage Relative to VSS:...... VSS - 0.5V
Maximum Input Voltage Relative to VSS:..... VDD + 0.7V
Storage Temperature: ............-65 to + 150
Operating Temperature:............. 0 to +70
Maximum ESD protection ................2000V
Maximum Power Supply: .................5.5V
This device contains circuitry to protect the inputs against damage due to high static voltages or electric field; however, precautions should be taken to avoid application of any voltage higher than the maximum rated voltages to this circuit. For proper operation, Vin and Vout should be constrained to the range:
VSS<(Vin or Vout)<VDD
Unused inputs must always be tied to an appropriate logic voltage level (either VSS or VDD).
Maximum Input Voltage Relative to VSS:..... VDD + 0.7V
Storage Temperature: ............-65 to + 150
Operating Temperature:............. 0 to +70
Maximum ESD protection ................2000V
Maximum Power Supply: .................5.5V
This device contains circuitry to protect the inputs against damage due to high static voltages or electric field; however, precautions should be taken to avoid application of any voltage higher than the maximum rated voltages to this circuit. For proper operation, Vin and Vout should be constrained to the range:
VSS<(Vin or Vout)<VDD
Unused inputs must always be tied to an appropriate logic voltage level (either VSS or VDD).
C9851 Features
• Six pairs of current referenced differential clocks
• Two 3V 180° displaced Mref clocks for DRCG
• One 66.6 MHz reference output
• One 14.318 MHz reference output
• Select logic for Differential Swing Control, Test mode, Hi-Z, Power-down, Spread spectrum, and limited frequency select
• Cypress Spread Spectrum for EMI reduction
• 48 Pin SSOP Package
• Two 3V 180° displaced Mref clocks for DRCG
• One 66.6 MHz reference output
• One 14.318 MHz reference output
• Select logic for Differential Swing Control, Test mode, Hi-Z, Power-down, Spread spectrum, and limited frequency select
• Cypress Spread Spectrum for EMI reduction
• 48 Pin SSOP Package
C9851 Connection Diagram
C9851
PDF/DataSheet Download
- Datasheet: C9851
- File Size: 125814 KB
- Manufacturer: CYPRESS [Cypress Semiconductor]
- Click here to Download
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