Datasheet
PROGRAMMABLE TIMING CONTROL HUB FOR
INTEL BASED SYSTEMS
ICS9LRS3187B
Features/Benefits:
Recommended Application:
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Supports spread spectrum modulation, 0 to -0.5%
down spread for CPU and SRC clocks
CK505version1.1clock,withfullyintegratedvoltageregulators
and series resistors
Uses external 14.318MHz crystal, external crystal load
caps are required for frequency tuning
Output Features:
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2 - CPU differential low power push-pull pairs
1 - SRC differential low power push-pull pair
1 - SATA differential low power push-pull pair
1 - DOT differential low power push-pull pair
1 - REF, able to drive 3 loads, 14.318MHz
1 - 27MHz_SS/non_SS single-ended output pair
Available in commercial (0 to +70°C) and industrial
(-40 to +85°C) temperature ranges
Meets PCIe Gen2 specifications
Key Specifications:
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CPU outputs cycle-cycle jitter <85ps
SRC outputs cycle-cycle jitter <125ps
+/- 100ppm frequency accuracy on all clocks
Pin Configuration
32 31 30 29 28 27 26 25
VDDDOT96MHz_3.3 1
GNDDOT96MHz 2
DOT96T_LPR 3
DOT96C_LPR 4
VDD_27MHz 5
VDDCPU_3.3
CPUT0_LPR
CPUC0_LPR
GNDCPU
24
23
22
21
20
19
18
17
9LRS3187
CPUT1_LPR
CPUC1_LPR
VDDCPU_IO
VDDSRC_3.3
27MHz_nonSS 6
27MHz_SS 7
GND27MHz 8
9 10 11 12 13 14 15 16
** Internal Pull-Down Resistor
* Internal Pull-Up Resistor
32-pin MLF
IDT® Programmable Timing Control Hub for Intel Based Systems
1602F—11/04/11
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