932SQ420DGLF Datasheet 932SQ420DGLFT, 932SQ420DKLF, 932SQ420DGLF | P19-P21

932SQ420D

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS

IDT®

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS 19

932SQ420D REV J 010715

Line

Byte5

Bit4

FS4

Byte5

Bit3

FS3

Byte5

Bit2

FS2

Byte5

Bit1

FS 1

Byte5

Bit0

FS0

NS_xxx

(MHz)

0 0 0 0 0 0 58.33

1 0 0 0 0 1 61.11

2 0 0 0 1 0 63.89

3 0 0 0 1 1 66.67

4 0 0 1 0 0 69.44

5 0 0 1 0 1 72.22

6 0 0 1 1 0 75.00

7 0 0 1 1 1 77.78

8 0 1 0 0 0 80.56

9 0 1 0 0 1 83.33

10 0 1 0 1 0 86.11

11 0 1 0 1 1 88.89

12 0 1 1 0 0 91.67

13 0 1 1 0 1 94.44

14 0 1 1 1 0 97.22

01111

100.00

16 1 0 0 0 0 102.78

17 1 0 0 0 1 105.56

18 1 0 0 1 0 108.33

19 1 0 0 1 1 111.11

20 1 0 1 0 0 113.89

21 1 0 1 0 1 116.67

22 1 0 1 1 0 119.44

23 1 0 1 1 1 122.22

24 1 1 0 0 0 125.00

25 1 1 0 0 1 127.78

26 1 1 0 1 0 130.56

27 1 1 0 1 1 133.33

28 1 1 1 0 0 136.11

29 1 1 1 0 1 138.89

30 1 1 1 1 0 141.67

31 1 1 1 1 1 144.44

NOTE: Operation at other than the default entry is not

guaranteed. These values are for margining purposes only.

NS_SAS Margining Table

932SQ420D

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS

IDT®

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS 20

932SQ420D REV J 010715

Common Recommendations for Differential Routing D imension or Value Unit Figure

L1 length, route as non-coupled 50ohm trace 0.5 max inch 1

L2 length, route as non-coupled 50ohm trace 0.2 max inch 1

L3 length, route as non-coupled 50ohm trace 0.2 max inch 1

Rs 33 ohm 1

Rt 49.9 ohm 1

Down Device Differential Routing

L4 length, route as coupled microstrip 100ohm differential trace 2 min to 16 max inch 1

L4 length, route as coupled stripline 100ohm differential trace 1.8 min to 14.4 max inch 1

Differential Routing to PCI Express Connector

L4 length, route as coupled microstrip 100ohm differential trace 0.25 to 14 max inch 2

L4 length, route as coupled stripline 100ohm differential trace 0.225 min to 12.6 max inch 2

DIF Reference Clock

HCSL Output Buffer

L1'

L2'

L4'

L3L3'

Rt Rt

PCI Express

Down Device

REF_CLK Input

Figure 1: Down Device Routing

HCSL Output Buffer

L1'

L2'

L4'

L3L3'

Rt Rt

PCI Express

Add-in Board

REF_CLK Input

Figure 2: PCI Express Connector Routing

932SQ420D

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS

IDT®

PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS 21

932SQ420D REV J 010715

Vdiff Vp-p Vcm R1 R2 R3 R4 Note

0.45v 0.22v 1.08 33 150 100 100

0.58 0.28 0.6 33 78.7 137 100

0.80 0.40 0.6 33 78.7 none 100 ICS874003i-02 input compatible

0.60 0.3 1.2 33 174 140 100 Standard LVDS

R1a = R1b = R1

R2a = R2b = R2

Alternative Termination for LVDS and other Common Differential Signals (figure 3)

HCSL Output Buffer

L1'

R1b

L2'

R1a

L4'

R2a R2b

Down Device

REF_CLK Input

Figure 3

L3'

R3 R4

Component Value Note

R5a, R5b 8.2K 5%

R6a, R6b 1K 5%

Cc 0.1 µF

Vcm 0.350 volts

Cable Connected AC Coupled Application (figure 4)

PCIe Device

REF_CLK Input

Figure 4

R5a

L4'

3.3 Volts

R5b

R6a R6b

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P28

932SQ420DGLF

Mfr. #:

Buy 932SQ420DGLF

Manufacturer:

IDT

Description:

Clock Synthesizer / Jitter Cleaner CK420BQ

Lifecycle:

New from this manufacturer.

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932SQ420DGLF

932SQ420DGLF

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