9VRS4339B Datasheet, PDF (1/21 Pages) Integrated Device Technology – VERY LOW POWER CLOCK FOR 2011 NETBOOKS

VERY LOW POWER CLOCK FOR 2011 NETBOOKS
DATASHEET
9VRS4339B
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
Pin Configuration
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
56 55 54 53 52 51 50 49 48 47 46 45 44 43
X2 1
42 SRC2_LPRS
X1 2
41 SRC2#_LPRS
VDD25_3.3 3
40 GNDSRC
25M 4
39 SRC6_LPRS
SDATA_3.3 5
38 SRC6#_LPRS
SCLK_3.3 6
37 SRC3_LPRS
VDDPCI_3.3 7
vITP_EN/PCI_F1_2x 8
9VRS4339B
36 SRC3#_LPRS
35 PCI_STOP#_3.3
FSLB/PCI2_2x 9
34 VDDSRC_LVIO
CLKREQA#/PCI3_2x 10
33 SRC4_LPRS
GNDPCI 11
32 SRC4#_LPRS
GND14M 12
31 SATA_LPRS
14M_2X/FSLC 13
30 SATA#_LPRS
VDD14_3.3 14
29 GNDSATA
15 16 17 18 19 20 21 22 23 24 25 26 27 28
IDT® VERY LOW POWER CLOCK FOR 2011 NETBOOKS
v prefix indicates internal pull-down resistor
^ prefix indicates internal pull-up resistor
1
9VRS4339B
REV A 010312