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Integrated Device Technology Electronic Components Datasheet

ICS932S421B Datasheet

PCIe Gen2 and QPI Clock

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ICS932S421B pdf
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


Integrated Device Technology Electronic Components Datasheet

ICS932S421B Datasheet

PCIe Gen2 and QPI Clock

No Preview Available !

ICS932S421B pdf
ICS932S421B
PCIe Gen2 and QPI Clock for Intel-Based Servers
Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
PIN NAME
VDDPCI
GNDPCI
PCICLK0
PCICLK1
PCICLK2
PCICLK3
GNDPCI
VDDPCI
PCICLK_F0
PCICLK_F1
PCICLK_F2
VDD48
48MHz
GND48
VDDSRC
SRCCLKT0
SRCCLKC0
SRCCLKC1
SRCCLKT1
GNDSRC
SRCCLKT2
SRCCLKC2
SRCCLKC3
SRCCLKT3
VDDSRC
SRCCLKT4
SRCCLKC4
VDDSRC
PIN TYPE
DESCRIPTION
PWR Power supply for PCI clocks, nominal 3.3V
PWR Ground pin for the PCI outputs
OUT PCI clock output.
OUT PCI clock output.
OUT PCI clock output.
OUT PCI clock output.
PWR Ground pin for the PCI outputs
PWR Power supply for PCI clocks, nominal 3.3V
OUT Free running PCI clock not affected by PCI_STOP# .
OUT Free running PCI clock not affected by PCI_STOP# .
OUT Free running PCI clock not affected by PCI_STOP# .
PWR Power pin for the 48MHz output.3.3V
OUT 48MHz clock output.
PWR Ground pin for the 48MHz outputs
PWR Supply for SRC clocks, 3.3V nominal
OUT True clock of differential SRC clock pair.
OUT Complement clock of differential SRC clock pair.
OUT Complement clock of differential push-pull SRC clock pair.
OUT True clock of differential SRC clock pair.
PWR Ground pin for the SRC outputs
OUT True clock of differential SRC clock pair.
OUT Complement clock of differential SRC clock pair.
OUT Complement clock of differential SRC clock pair.
OUT True clock of differential SRC clock pair.
PWR Supply for SRC clocks, 3.3V nominal
OUT True clock of differential SRC clock pair.
OUT Complement clock of differential SRC clock pair.
PWR Supply for SRC clocks, 3.3V nominal
IDTTM PCIe Gen2 and QPI Clock for Intel-Based Servers
2
1340G—01/26/10


Part Number ICS932S421B
Description PCIe Gen2 and QPI Clock
Maker IDT
Total Page 23 Pages
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