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ICS9FG104DGLF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
IDT
®
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA 1541C—12/16/10
ICS9FG104D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
13
Common Recommendations for Differential Routing Dimension 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
L1'
Rs
L2
L2'
Rs
L4'
L4
L3L3'
Rt Rt
PCI Express
Down Device
REF_CLK Input
Figure 1: Down Device Routing
HCSL Output Buffer
L1
L1'
Rs
L2
L2'
Rs
L4'
L4
L3L3'
Rt Rt
PCI Express
Add-in Board
REF_CLK Input
Figure 2: PCI Express Connector Routing
IDT
®
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA 1541C—12/16/10
ICS9FG104D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
14
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
L1'
R1b
L2
L2'
R1a
L4'
L4
L3
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'
L4
3.3 Volts
R5b
R6a R6b
Cc
Cc
IDT
®
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA 1541C—12/16/10
ICS9FG104D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
15
INDEX
AREA
INDEX
AREA
1 2
N
D
h x 45°
E1
E
α
SEATING
PLANE
SEATING
PLANE
A1
A
e
- C -
b
.10 (.004) C
.10 (.004) C
c
L
MIN MAX MIN MAX
A -- 2.00 -- .079
A1 0.05 -- .002 --
A2 1.65 1.85 .065 .073
b 0.22 0.38 .009 .015
c 0.09 0.25 .0035 .010
D
E 7.40 8.20 .291 .323
E1 5.00 5.60 .197 .220
e
L 0.55 0.95 .022 .037
N
α
0° 8° 0° 8°
VARIATIONS
MIN MAX MIN MAX
28 9.90 10.50 .390 .413
10-0033
Reference Doc.: JEDEC Publication 95, MO-150
0.0256 BASIC
COMMON DIMENSIONS
In Millimeters In Inches
COMMON DIMENSIONS
209 mil SSOP
N
SEE VARIATIONS SEE VARIATIONS
D mm. D (inch)
SYMBOL
SEE VARIATIONS SEE VARIATIONS
0.65 BASIC
28-Pin SSOP Package Drawing and Dimensions
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

ICS9FG104DGLF

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IC FREQ TIMING GENERATOR 28TSSOP
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