General Description
The 9VRS4339B is a Intel CK-NET compatible main clock
for Intel Netbooks, conforming to the CK-NET specification.
It is driven with a 25MHz crystal and generates a variety of
clocks, including an LCD clock. An SMBus interface allows
full control of the device.
Output Features
• 2 – 0.8V push-pull differential CPU pairs
• 5 – 0.8V push-pull differential SRC pairs
• 1 – 0.8V push-pull differential SATA pair
• 1 – 0.8V push-pull differential DOT96/SRC pair
• 1 – 0.8V push-pull differential LCD100 pair
• 1 – 0.8V push-pull differential CPU_ITP/SRC pair
• 2 – PCI (33MHz)
• 1 – PCI_F, (33MHz) free-running
• 1 – USB_48MHz
• 1 – 48MHz
• 1 – 25MHz
• 1 – 27MHz/PCI
• 1 – 14.318MHz

Features/Benefits
• Supports Wake_On_LAN (see pin55 pin description)
• Selectable spread % on CPU, SRC, PCI; Supports
margining
• Uses external 25MHz crystal, external crystal load caps
are required for frequency tuning
• CLKREQ# pins; Support SRC power management
• Low power differential clock outputs driving 100 ohm
differential traces; reduced powe
• Integrated 33 ohm series resistors on all differential
outputs; reduced board space
Key Specifications
• CPU outputs cycle-to-cycle jitter <85ps
• SRC cycle-to-cycle jitter <85ps
• SRC meets PCIEX Gen2 specifications
• SATA outputs cycle-to-cycle jitter <125ps
• PCI outputs cycle-to-cycle jitter <500ps
• ±100ppm frequency accuracy on all clocks