DATASHEET
Low Power Clock for Intel Atom®-Based Systems
9LPRS436C
Key Specifications:
Recommended Application:
NM10 Express Chipset + N450/D410/D510 Atom® CPUs
•
•
•
•
•
CPU outputs cycle-cycle jitter < 85ps
PCIEX outputs cycle-cycle jitter < 125ps
SATA outputs cycle-cycle jitter < 125ps
PCI outputs cycle-cycle jitter < 500ps
+/- 100ppm frequency accuracy on all clocks
Output Features:
•
•
•
•
•
•
•
•
•
•
•
•
2 - 0.8V push-pull differential CPU pairs
2 - 0.8V push-pull differential PCIEX pairs
1 - 0.8V push-pull differential SATA75 pair
1 - 0.8V push-pull differential DOT96 pair
1 - 0.8V push-pull differential CPU/PCIEX selectable pair
1 - PCI (33MHz)
1 - PCICLK_F, (33MHz) free-running
1 - USB, 48MHz
1 - 12/48MHz
Features/Benefits:
•
•
•
VDDSUSP allows 25MHz to run in S-states
Supports programmable spread percentage
Uses external 25MHz crystal, external crystal load caps
are required for frequency tuning
•
•
•
PEREQ# pins to support PCIEX/SATA power
management.
1 - 25MHz
1 - REF, 14.318MHz
1 - 12.288MHz
Low power differential clock outputs (No 50Ω resistor to
GND needed)
Integrated 33Ω series resistor on all differential outputs.
Pin Configuration
**FS3/12_288M_2x
VDD12_288
1
2
48 GND
47 GND
PEREQ1# 3
PEREQ2# 4
46 REF0_2x/FSLC
VDD14
45
**FS4/PCICLK0_2x 5
GND 6
44 Vtt_PwrGd/WOL_STOP#
43 VDDSUSP
42 25MHz
VDDPCI 7
**ITP_EN/PCICLK_F0_2x 8
PEREQ3# 9
41 GND
40 X1_25
*SEL12_48#/12_48MHz_2x 10
VDD 11
39 X2_25
38 PCI&PCIEX_STOP#
37 CPU_STOP#
36 SDATA
FSLA/USB48_2x 12
GND 13
DOTT_96MHzLR 14
DOTC_96MHzLR 15
FSLB 16
35 SCLK
34 GND
33 CPUT_LR0
32 CPUC_LR0
31 VDDCPU
30 CPUT_LR1
29 CPUC_LR1
28 CPUITPT_LR2/PCIeT_LR2
27 CPUITPC_LR2/PCIeC_LR2
26 VDDPCIEX
25 GND
GNDSATA 17
SATAT_LR/PCIeT_LR3 18
SATAC_LR/PCIeC_LR3 19
VDDSATA 20
PCIeT_LR0 21
PCIeC_LR0 22
PCIeT_LR1 23
PCIeC_LR1 24
48-TSSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
IDT® Low Power Clock for Intel Atom®-Based Systems
1561C —08/24/11
1