cy2310anz Cypress Semiconductor Corporation., cy2310anz Datasheet - Page 6

• Manufacturer Part Number: cy2310anz
• Description: 3.3v Sdram Buffer For Mobile Pcs With 4 So-dimms
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 38-07142 Rev. *B
Application Information
Clock traces must be terminated with either series or parallel termination, as is normally done.
Summary
• Surface mount, low-ESR, ceramic capacitors should be used for filtering. Typically, these capacitors have a value of 0.1 µF.
• The value of the series terminating resistor satisfies the following equation, where Rtrace is the loaded characteristic impedance
• Footprints must be laid out for optional EMI-reducing capacitors, which should be placed as close to the terminating resistor
• A Ferrite Bead may be used to isolate the Board V
• If a Ferrite Bead is used, a 10 µF–22 µF tantalum bypass capacitor should be placed close to the Ferrite Bead. This capacitor
In some cases, smaller value capacitors may be required.
of the trace, Rout is the output impedance of the buffer (typically 25Ω), and Rseries is the series terminating resistor.
as is physically possible. Typical values of these capacitors range from 4.7 pF to 22 pF.
greater than 50Ω impedance at the clock frequency, under loaded DC conditions. Please refer to the application note “Layout
and Termination Techniques for Cypress Clock Generators” for more details.
prevents power supply droop during current surges.
Rseries > Rtrace – Rout
DD
from the clock generator V
DD
island. Ensure that the Ferrite Bead offers
CY2310ANZ
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