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PDF ICS9FG108D Data sheet ( Hoja de datos )

Número de pieza ICS9FG108D
Descripción Frequency Generator
Fabricantes IDT 
Logotipo IDT Logotipo



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Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
DATASHEET
ICS9FG108D
Description
ICS9FG108D is a Frequency Timing Generator that provides 8
differential output pairs that are compliant to the Intel CK410
specification. It also provides support for PCI-Express, next
generation I/O, 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 65 ps. ICS9FG108D 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
• 8 - 0.7V current-mode differential output pairs
• Supports Serial-ATA at 100 MHz
• Two spread spectrum modes: 0 to -0.5 down spread
and +/-0.25% center spread
• 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 < 65 ps
• +/-300 ppm frequency accuracy on output clocks
• +/-50 ppm at any frequency with spread off
Functional Block Diagram
XIN/CLKIN
X2
OE(7:0)
OSC
PROGRAMMABLE
SPREAD PLL
STOP
LOGIC
8
R EFOU T
DIF(7:0)
SPREAD
SEL14M_25M#
DIF_STOP#
FS(2:0)
SDATA
SCLK
CONTROL
LOGIC
IREF
IDTTM Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
1
1542E 12/16/10

1 page




ICS9FG108D pdf
ICS9FG108D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
Absolute Max
Symbol
VDD_A
VDD
Ts
Tambient
Tambient
Tcase
ESD prot
Parameter
3.3V Core Supply Voltage
3.3V Logic Supply Voltage
Storage Temperature
Ambient Operating Temp•(Commerical Grade)
Ambient Operating Temp•(Industrial Grade)
Case Temperature
Input ESD protection•human body model
Min
-65
0
-40
2000
Max
Units
4.6 V
4.6 V
150 °C
+70 °C
+85 °C
115 °C
V
Electrical Characteristics - REF-14.318/25 MHz
TA = Tambient, Supply Voltage VDD = 3.3 V +/-5%; RS=33, CL = 5pF
(unless otherwise specified)
SPEC
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS Notes
Long Accuracy
ppm see Tperiod min-max values
0 ppm 1
Clock period
Clock period
Tperiod
Tperiod
14.318MHz output nominal
25.000MHz output nominal
69.8413
40.0000
ns 1,2
ns 1,2
Output High Voltage
VOH
IOH = -1 mA
2.4
V1
Output Low Voltage
VOL
IOL = 1 mA
0.4 V 1
Output High Current
IOH
VOH @MIN = 1.0 V,
VOH@MAX = 3.135 V
-29
-23 mA 1
Output Low Current
IOL
VOL @MIN = 1.95 V,
VOL @MAX = 0.4 V
29
27 mA 1
Rise/Fall Time
trf1COM
trf1IND
VOL = 0.4 V, VOH = 2.4 V
Commercial Temp
VOL = 0.4 V, VOH = 2.4 V
Industrial Temp
0.5 0.8 2 ns 1
0.5 0.8 2 ns 1
Duty Cycle
dt1
VT = 1.5 V
45
55 % 1
Jitter
tjcyc-cycCOM
VT = 1.5 V (commerical)
150 200
ps
1
Jitter
tjcyc-cycIND
VT = 1.5 V (industrial)
250 400
ps
1
1Guaranteed by design and characterization, not 100% tested in production.
2 All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REF is at 14.31818 or 25.00
MHz
Electrical Characteristics - Differential Phase Jitter Parameters
TA = Commercial and Industrial, Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
Symbol
Conditions
SPEC
Min Typ Max
tjphasePLL
tjphaseLo
PCIe Gen 1
PCIe Gen 2
10kHz < f < 1.5MHz
30 86
1.2 3
Jitter, Phase
tjphaseHigh
tjphQPI
PCIe Gen 2
1.5MHz < f < Nyquist (50MHz)
QPI 133MHz 4.8G/6.4Gb,12UI
2.2
0.26/
0.18
3.1
0.5
tjphFBD3.2G
tjphFBD4.8G
FBD specs
(11 to 33MHz)
FBD specs
(11 to 33MHz)
1.8 3
1.4 2.5
1Guaranteed by design and characterization, not 100% tested in production.
2See http://www.pcisig.com for compelte specs
3First number is 4.8G link speed, second number is 6.4G link speed. From Intel Clock Jit tool 1.5.1
IDTTM Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
Units Notes
ps (p-p) 1,2
ps 1,2
(RMS)
ps 1,2
(RMS)
ps 1,3
(RMS)
ps 1
(RMS)
ps
(RMS)
1
1542E 12/16/10
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ICS9FG108D arduino
ICS9FG108D
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
SMBus Table: Byte Count Register
Byte 6
Pin #
Name
Bit 7
-
BC7
Bit 6
-
BC6
Bit 5
-
BC5
Bit 4
-
BC4
Bit 3
-
BC3
Bit 2
-
BC2
Bit 1
-
BC1
Bit 0
-
BC0
Control Function
Writing to this register
will configure how many
bytes will be read back,
default is 07 = 7 bytes.
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
-
-
-
-
-
-
-
-
1 Default
-0
-0
-0
-0
-0
-1
-1
-1
SMBus Table: Reserved Register
Byte 7
Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Control Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Type
0
1 Default
X
X
X
X
X
X
X
X
SMBus Table: Reserved Register
Byte 8
Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Control Function
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Type
0
1 Default
X
X
X
X
X
X
X
X
SMBus Table: M/N Programming Enable
Byte 9
Pin #
Name
Control Function
Bit 7
Bit 6
Bit 5
-
-
5
M/N_EN
OE_Polarity
REFOUT_En
PLL M/N Programming
Enable
Select Polarity of OE
inputs
Enables/Disables REF
Bit 4
Reserved
Bit 3
Reserved
Bit 2
Reserved
Bit 1
Reserved
Bit 0
Reserved
Type
RW
RW
RW
0 1 Default
Disable Enable 0
OE#
Disable
OE
Enable
1
1
0
0
0
0
0
IDTTM Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
11
1542E 12/16/10

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