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Integrated Device Technology Electronic Components Datasheet

ICS9FG104D Datasheet

Frequency Generator

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ICS9FG104D pdf
DATASHEET
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
ICS9FG104D
Description
The ICS9FG104D is a Frequency Timing Generator that provides 4
differential output pairs that are compliant to the Intel CK410
specification. It also provides support for PCI-Express and SATA.
The part synthesizes several output frequencies from either a
14.31818 Mhz crystal or a 25 MHz crystal. The device can also be
driven by a reference input clock instead of a crystal. It provides
outputs with cycle-to-cycle jitter of less than 50 ps and output-to-
output skew of less than 35 ps. The ICS9FG104D also provides a
copy of the reference clock. Frequency selection can be
accomplished via strap pins or SMBus control.
Key Specifications
Features/Benefits
• Generates common frequencies from 14.318 MHz or
25 MHz
• Crystal or reference input
• 4 - 0.7V current-mode differential output pairs
• Supports Serial-ATA at 100 MHz
• Two spread spectrum modes: 0 to -0.5 downspread
and +/-0.25% centerspread
• Unused inputs may be disabled in either driven or Hi-Z
state for power management.
• Output cycle-to-cycle jitter < 50 ps
• Output to output skew < 35 ps
• +/-300 ppm frequency accuracy on output clocks
• +/-50 ppm at any frequency w/spread off
Functional Block Diagram
XIN/CLKIN
X2
2
OSC
PROGRAMMABLE
SPREAD PLL
STOP
LOGIC
4
REFOUT
DIF(3:0)
SPREAD
SEL14M_25M#
DIF_STOP#
FS(2:0)
SDATA
SCLK
CONTROL
LOGIC
IREF
IDT® Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
1
1541C—12/16/10


Integrated Device Technology Electronic Components Datasheet

ICS9FG104D Datasheet

Frequency Generator

No Preview Available !

ICS9FG104D pdf
ICS9FG104D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
Pin Configuration
XIN/CLKIN 1
X2 2
VDD 3
GND 4
REFOUT 5
vFS2 6
DIF_3 7
DIF_3# 8
VDD 9
GND 10
DIF_2 11
DIF_2# 12
SDATA 13
SCLK 14
28 VDDA
27 GNDA
26 IREF
25 vFS0
24 vFS1
23 DIF_0
22 DIF_0#
21 VDD
20 GND
19 DIF_1
18 DIF_1#
17 ^SEL14M_25M#
16 vSPREAD
15 DIF_STOP#
^ Pin has internal 120K pull up
v Pin has internal 120K pull down
28-pin SSOP/TSSOP
Functionality Table
SEL14M_25M#
(FS3)
FS2 FS1 FS0 OUTPUT(MHz)
0
000
100.00
0
001
125.00
0
010
133.33
0
011
166.67
0
100
200.00
0
101
266.00
0
110
333.00
0
111
400.00
1
000
100.00
1
001
125.00
1
010
133.33
1
011
166.67
1
100
200.00
1
101
266.00
1
110
333.00
1
111
400.00
Power Groups
Pin Number
VDD
GND
34
9,21 10,20
28 27
Description
REFOUT, Digital Inputs
DIF Outputs
IREF, Analog VDD, GND for PLL Core
IDT® Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
2
1541C—12/16/10


Part Number ICS9FG104D
Description Frequency Generator
Maker IDT
Total Page 17 Pages
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