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ICS932S421B fiches techniques PDF

IDT - PCIe Gen2 and QPI Clock

Numéro de référence ICS932S421B
Description PCIe Gen2 and QPI Clock
Fabricant IDT 
Logo IDT 





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ICS932S421B fiche technique
DATASHEET
PCIe Gen2 and QPI Clock for Intel-Based Servers
ICS932S421B
Recommended Application:
PCIe Gen 2 & QPI compliant CK410B+ clock for Intel-based
servers
Output Features:
• 4 - 0.7V current-mode differential CPU pairs
• 5 - 0.7V current-mode differential SRC pair
• 4 - PCI (33MHz)
• 3 - PCICLK_F, (33MHz) free-running
• 1 - 48MHz
• 2 - REF, 14.318MHz
Features/Benefits:
• Supports spread spectrum modulation, 0 to -0.5%
down spread
• Uses external 14.318MHz crystal and external load
capacitors for low ppm synthesis error
• CPU clocks independent of SRC/PCI clocks
• D2/D3 SMBus address
Key Specifications:
• PCIe Gen 2 compliant SRC outputs
• QPI & FBD 2 compliant CPU clocks
• CPU cycle-cycle jitter: < 50ps
• SRC cycle-cycle jitter: < 125ps
• PCI cycle-cycle jitter: < 500ps
• CPU output skew: < 50ps
• SRC output skew: < 250ps
• ± 100ppm frequency accuracy on all outputs
Functionality
FS_C1
0
0
0
0
1
1
1
1
FS_B1
0
0
1
1
0
0
1
1
FS_A2
0
1
0
1
0
1
0
1
CPU
MHz
266.67
133.33
200.00
166.67
333.33
100.00
400.00
SRC PCI REF
MHz MHz MHz
100.00 33.33 14.32
Reserved
USB
MHz
48.00
1. FS_B and FS_C are three-level inputs. Please see VIL_FS and VIH_FS specifications in
the Input/Supply/Common Output Parameters Table for correct values.
Also refer to the Test Clarification Table.
2. FS_A is a low-threshold input. Please see the VIL_FS and VIH_FS
specifications in the Input/Supply/Common Output Parameters Table for correct values.
Pin Configuration
VDDPCI 1
GNDPCI 2
PCICLK0 3
PCICLK1 4
PCICLK2 5
PCICLK3 6
GNDPCI 7
VDDPCI 8
PCICLK_F0 9
PCICLK_F1 10
PCICLK_F2 11
VDD48 12
48MHz 13
GND48 14
VDDSRC 15
SRCCLKT0 16
SRCCLKC0 17
SRCCLKC1 18
SRCCLKT1 19
GNDSRC 20
SRCCLKT2 21
SRCCLKC2 22
SRCCLKC3 23
SRCCLKT3 24
VDDSRC 25
SRCCLKT4 26
SRCCLKC4 27
VDDSRC 28
56 FS_C/TEST_SEL
55 REF0
54 REF1
53 VDDREF
52 X1
51 X2
50 GNDREF
49 FS_B/TEST_MODE
48 FS_A
47 VDDCPU
46 CPUCLKT0
45 CPUCLKC0
44 VDDCPU
43 CPUCLKT1
42 CPUCLKC1
41 GNDCPU
40 CPUCLKT2
39 CPUCLKC2
38 VDDCPU
37 CPUCLKT3
36 CPUCLKC3
35 VDDA
34 GNDA
33 IREF
32 NC
31 Vtt_PwrGd#/PD
30 SDATA
29 SCLK
56-pin SSOP & TSSOP
IDTTM PCIe Gen2 and QPI Clock for Intel-Based Servers
1340G—01/26/10
1

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