DATASHEET
Four Output Differential Frequency Generator
for PCIe Gen3 and QPI
9FG430
General Description:
Features/Benefits:
The 9FG430 is a Frequency Timing Generator that provides 4
HCSL differential output pairs. These outputs support PCI-Express
Gen3, and QPI applications. The part supports Spread Spectrum
and synthesizes several additional output frequencies from either
a 14.31818 MHz crystal, a 25 MHz crystal or reference input clock.
The 9FG430 also outputs a copy of the reference clock. Complete
control of the device is available via strapping pins or via the
SMBus inteface.
•
•
•
•
•
Recommended Application:
4 Output Differential Frequency Generator for PCIe Gen3 and QPI
•
•
Key Specifications:
•
•
•
•
•
Output Features:
4 - 0.7V current mode differential HCSL output pairs
1 - 3.3V LVTTL REF output
Pin-to-Pin with 9FG104D/Easy upgrade to PCIe Gen3
Generates common frequencies from 14.318 MHz or 25
MHz; single part supports mulitple applications
Provides copy of reference output; eleminates need for
additional crystal or oscillator
Unused outputs may be disabled in Hi-Z; save system
power
Device may be configured by SMBus and/or strap pins;
can be used in systems without SMBus
Cycle-to-cycle jitter: < 50ps with 25MHz input
Output-to-output skew: 200 mV
4
DIF_IN input
2
5
The differential input clock must be running for the SMBus to be active
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
1681D—04/04/17
4
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
Electrical Characteristics - DIF 0.7V Current Mode Differential Outputs
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%; See Test Loads s for loading conditions.
PARAMETER
SYMBOL
CONDITIONS
MIN
Slew rate
Slew rate matching
Trf
∆Trf
Scope averaging on
Slew rate matching, Scope averaging on
1
Voltage High
VHigh
660
Voltage Low
VLow
Statistical measurement on single-ended signal
using oscilloscope math function. (Scope
averaging on)
Max Voltage
Min Voltage
Vswing
Crossing Voltage (abs)
Crossing Voltage (var)
Vmax
Vmin
Vswing
Vcross_abs
∆-Vcross
Measurement on single ended signal using
absolute value. (Scope averaging off)
Scope averaging off
Scope averaging off
Scope averaging off
TYP
MAX UNITS NOTES
V/ns 1, 2, 3
4
%
20
1, 2, 4
850
1
mV
-150
150
1150
-300
300
250
550
140
1
mV
mV
mV
mV
1
1
1, 2
1, 5
1, 6
Guaranteed by design and characterization, not 100% tested in production. IREF = VDD/(3xRR). For RR = 475Ω (1%), IREF = 2.32mA.
IOH = 6 x IREF and VOH = 0.7V @ ZO=50Ω (100Ω differential impedance).
1
2
Measured from differential waveform
3
Slew rate is measured through the Vswing voltage range centered around differential 0V. This results in a +/-150mV window around
differential 0V.
4
Matching applies to rising edge rate of Clock / falling edge rate of Clock#. It is measured in a +/-75mV window centered on the
average cross point where Clock rising meets Clock# falling. The median cross point is used to calculate the voltage thresholds the
oscilloscope uses for the edge rate calculations.
5
Vcross is defined as voltage where Clock = Clock# measured on a component test board and only applies to the differential rising
edge (i.e. Clock rising and Clock# falling).
6
The total variation of all Vcross measurements in any particular system. Note that this is a subset of V_cross_min/max (V_cross
absolute) allowed. The intent is to limit Vcross induced modulation by setting V_cross_delta to be smaller than V_cross absolute.
Electrical Characteristics - Current Consumption
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%, See Test Loads for loading
PARAMETER
Operating Supply Current
Powerdown Current
SYMBOL
CONDITIONS
I DD3.3
VDD, All outputs active @100MHz
VDDA, All outputs active @100MHz
VDD, All outputs active @400MHz
VDDA, All outputs active @400MHz
VDD, All differential pairs driven
VDDA, All differential pairs driven
VDD, All differential pairs tri-stated
VDDA, All differential pairs tri-stated
I DDA3.3OP
I DD3.3
I DDA3.3OP
I DD3.3PD
I DDA3.3PD
IDD3.3PDZ
I DDA3.3PDZ
MIN
TYP
MAX
80
25
100
25
75
25
25
25
95
30
120
30
90
30
30
30
TYP
MAX
UNITS NOTES
mA
mA
mA
mA
mA
mA
mA
mA
1
1
1
1
1
1
1
1
1
Guaranteed by design and characterization, not 100% tested in production.
I REF = VDD/(3xRR). For RR = 475Ω (1%), I REF = 2.32mA. I OH = 6 x IREF and VOH = 0.7V @ ZO=50Ω.
2
Electrical Characteristics - Output Duty Cycle, Jitter, and Skew Characterisitics
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%, See Test Loads for loading
PARAMETER
SYMBOL
CONDITIONS
MIN
Duty Cycle
Skew, Output to Output
Jitter, Cycle to cycle
Jitter, Cycle to cycle
tDC
t sk3
Measured differentially, PLL Mode
VT = 50%
25M input
14.318M input
45
t jcyc-cyc
t jcyc-cyc
55
50
50
60
UNITS NOTES
%
ps
ps
ps
1
1
1,3
1,3
1
Guaranteed by design and characterization, not 100% tested in production.
I REF = VDD/(3xRR). For RR = 475Ω (1%), I REF = 2.32mA. I OH = 6 x IREF and VOH = 0.7V @ ZO=50Ω.
3
Measured from differential waveform
4
Duty cycle distortion is the difference in duty cycle between the output and the input clock when the device is operated in bypass mode.
2
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
1681D—04/04/17
5
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
Electrical Characteristics - Phase Jitter Parameters
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V +/-5%, See Test Loads for loading conditions
PARAMETER
Phase Jitter, PCI Express
SYMBOL
t jphPCIeG1
t jphPCIeG2
t jphPCIeG3
Phase Jitter, QPI/SMI
tjphQPI_SMI
CONDITIONS
PCIe Gen 1
PCIe Gen 2 Lo Band
10kHz < f < 1.5MHz
PCIe Gen 2 High Band
1.5MHz < f < Nyquist (50MHz)
PCIe Gen 3
(PLL BW of 2-4MHz, CDR = 10MHz)
QPI & SMI
(100MHz or 133MHz, 4.8Gb/s, 6.4Gb/s 12UI)
QPI & SMI
(100MHz, 8.0Gb/s, 12UI)
QPI & SMI
(100MHz, 9.6Gb/s, 12UI)
MIN
TYP
MAX
86
3
3.1
1
0.5
0.3
0.2
UNITS Notes
ps (p-p) 1,2,3,6
ps
1,2,6
(rms)
ps
1,2,6
(rms)
ps
1,2,4,5,
(rms)
6
ps
1,5,6
(rms)
ps
1,5,6
(rms)
ps
1,5,6
(rms)
1
Guaranteed by design and characterization, not 100% tested in production.
See http://www.pcisig.com for complete specs
3
Sample size of at least 100K cycles. This figures extrapolates to 108ps pk-pk @ 1M cycles for a BER of 1-12.
4
Subject to final radification by PCI SIG.
5
Calculated from Intel-supplied Clock Jitter Tool v 1.6.3
6
Applies to all differential outputs
2
Electrical Characteristics - REF-14.318/25 MHz
TA = TCOM or TIND; Supply Voltage VDD = 3.3 V
PARAMETER
SYMBOL
Long Accuracy
ppm
Clock period
Tperiod
Clock period
Tperiod
+/-5%, See Test Loads for loading
CONDITIONS
see Tperiod min-max values
14.318MHz output nominal
25.000MHz output nominal
MIN
Output High Voltage
VOH
I OH = -1 mA
Output Low Voltage
Output High Current
Output Low Current
Rise/Fall Time
VOL
I OH
I OL
t rf1
I OL = 1 mA
VOH @MIN = 1.0 V, VOH@MAX = 3.135 V
VOL @MIN = 1.95 V, VOL @MAX = 0.4 V
VOL = 0.4 V, VOH = 2.4 V
-29
29
0.5
Duty Cycle
dt1
VT = 1.5 V
45
Jitter
t jcyc-cyc
VT = 1.5 V
TYP
0
69.8413
40
MAX
2.4
0.8
250
UNITS
ppm
ns
ns
Notes
1
1,2
1,2
V
1
0.4
-23
27
2
V
mA
mA
ns
1
1
1
1
55
%
1
400
ps
1
1
Guaranteed 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
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
1681D—04/04/17
6
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
Output Termination and Layout Information
Common Recommendations for Differential Routing
Dimension or Value
L1 length, route as non-coupled 50ohm trace
0.5 max
L2 length, route as non-coupled 50ohm trace
0.2 max
L3 length, route as non-coupled 50ohm trace
0.2 max
Rs
33
Rt
49.9
Unit
inch
inch
inch
ohm
ohm
Figure
1
1
1
1
1
Down Device Differential Routing
L4 length, route as coupled microstrip 100ohm differential trace 2 min to 16 max
L4 length, route as coupled stripline 100ohm differential trace
1.8 min to 14.4 max
inch
inch
1
1
Differential Routing to PCI Express Connector
L4 length, route as coupled microstrip 100ohm differential trace 0.25 to 14 max
L4 length, route as coupled stripline 100ohm differential trace
0.225 min to 12.6 max
inch
inch
2
2
Figure 1: Down Device Routing
(Test Load)
L2
L1
Rs
L4
L4'
L2'
L1'
Rs
HCSL Output Buffer
Rt
Rt
L3'
PCI Express
Down Device
REF_CLK Input
L3
Figure 2: PCI Express Connector Routing
L2
L1
Rs
L4
L4'
L2'
L1'
HCSL Output Buffer
Rs
Rt
Rt
L3'
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
PCI Express
Add-in Board
REF_CLK Input
L3
1681D—04/04/17
7
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
Termination for LVDS and other Common Differential Signals (figure 3)
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
Figure 3
L2
L1
R3
R1a
L4
R4
L4'
L2'
L1'
R1b
HCSL Output Buffer
R2a
R2b
L3'
Down Device
REF_CLK Input
L3
Termination for Cable AC Coupled Application (figure 4)
Component
Value
Note
R5a, R5b
8.2K 5%
R6a, R6b
1K 5%
Cc
0.1 µF
Vcm
0.350 volts
Figure 4
3.3 Volts
R5a
R5b
R6a
R6b
Cc
L4
L4'
Cc
PCIe Device
REF_CLK Input
Figure 5. REF Output Test Load
Zo = 50 ohms
33
5pF
9FGxxx REF Output
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
1681D—04/04/17
8
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
Differential Clock Tolerances x1 = 25MHz
Clock Periods - Differential Outputs with Spread Spectrum Disabled
SSC OFF
or SSC +/- Synthesis
0.25%
Error
Center
(ppm)
Spread
DIF
0
0
0
10
0
6
10
0
1 Clock
Center
Freq.
MHz
100.00
125.00
133.33
166.67
200.00
266.67
333.33
400.00
1us
Measurement Window
0.1s
0.1s
0.1s
1us
1 Clock
+SSC
-SSC
- ppm
+ ppm
+c2c
Units
-c2c jitter
0 ppm
ShortShort-Term Long-Term
Long-Term
jitter
AbsPer
Period
Term
Average
Average
Average
AbsPer
Min
Nominal
Average
Min
Min
Max
Max
Max
9.95000
10.00000 10.00000 10.00000
10.05000 ns
7.95000
8.00000
8.00000
8.00000
8.05000
ns
7.45000
7.50000
7.50000
7.50000
7.55000
ns
5.94994
5.99994
6.00000
6.00006
6.05006
ns
4.95000
5.00000
5.00000
5.00000
5.05000
ns
3.69998
3.74998
3.75000
3.75002
3.80002
ns
2.94997
2.99997
3.00000
3.00003
3.05003
ns
2.45000
2.50000
2.50000
2.50000
2.55000
ns
Notes
1,2
1,2
1,2
1,2
1,2
1,2
1,2
1,2
Clock Periods - Differential Outputs with Spread Spectrum Enabled
1
2
1 Clock
SSC ON
-0.5%
Down
Spread
Synthesis
Error
(ppm)
Center
Freq.
MHz
DIF
96
19
96
10
96
-98
10
96
99.75
124.69
133.00
166.25
199.50
266.00
332.50
399.00
1us
Measurement Window
0.1s
0.1s
0.1s
1us
+SSC
-SSC
- ppm
+ ppm
-c2c jitter
0 ppm
ShortShort-Term Long-Term
Long-Term
AbsPer
Period
Term
Average
Average
Average
Min
Nominal
Average
Min
Min
Max
Max
9.94906
9.99906
10.02406 10.02506 10.02603 10.05103
7.94925
7.99925
8.01925
8.02005
8.02020
8.04020
7.44930
7.49930
7.51805
7.51880
7.51952
7.53827
5.94943
5.99943
6.01443
6.01504
6.01510
6.03010
4.94953
4.99953
5.01203
5.01253
5.01301
5.02551
3.69965
3.74965
3.75902
3.75940
3.75903
3.76841
2.94972
2.99972
3.00722
3.00752
3.00755
3.01505
2.44977
2.49977
2.50602
2.50627
2.50651
2.51276
1 Clock
+c2c
Units
jitter
AbsPer
Max
10.10103
8.09020
7.58827
6.08010
5.07551
3.81841
3.06505
2.56276
ns
ns
ns
ns
ns
ns
ns
ns
Notes
1,2
1,2
1,2
1,2
1,2
1,2
1,2
1,2
Guaranteed by design and characterization, not 100% tested in production.
All ppm specifications are guaranteed with the assumption that the REF output is tuned to the exact target XTAL frequency.
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
1681D—04/04/17
9
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
Differential Clock Tolerances, x1 = 14.31818MHz
Clock Periods - Differential Outputs with Spread Spectrum Disabled
SSC OFF
or SSC +/- Synthesis
0.25%
Error
Center
(ppm)
Spread
DIF
35
-114
35
-104
35
42
-104
35
1 Clock
Center
Freq.
MHz
100.00
125.00
133.33
166.67
200.00
266.67
333.33
400.00
1us
Measurement Window
0.1s
0.1s
0.1s
1us
1 Clock
+SSC
-SSC
- ppm
+ ppm
+c2c
Units
-c2c jitter
0 ppm
ShortShort-Term Long-Term
Long-Term
jitter
AbsPer
Period
Term
Average
Average
Average
AbsPer
Min
Nominal
Average
Min
Min
Max
Max
Max
9.94965
9.99965 10.00000 10.00035
10.05035 ns
7.95091
8.00091
8.00000
7.99909
8.04909
ns
7.44974
7.49974
7.50000
7.50026
7.55026
ns
5.95062
6.00062
6.00000
5.99937
6.04937
ns
4.94983
4.99983
5.00000
5.00018
5.05018
ns
3.69984
3.74984
3.75000
3.75016
3.80016
ns
2.95031
3.00031
3.00000
2.99969
3.04969
ns
2.44991
2.49991
2.50000
2.50009
2.55009
ns
Notes
1,2
1,2
1,2
1,2
1,2
1,2
1,2
1,2
Clock Periods - Differential Outputs with Spread Spectrum Enabled
1
2
1 Clock
SSC ON
-0.5%
Down
Spread
Synthesis
Error
(ppm)
Center
Freq.
MHz
DIF
199
-100
199
10
199
-140
10
199
99.75
124.69
133.00
166.25
199.50
266.00
332.50
399.00
1us
Measurement Window
0.1s
0.1s
0.1s
1us
+SSC
-SSC
- ppm
+ ppm
-c2c jitter
0 ppm
ShortShort-Term Long-Term
Long-Term
AbsPer
Period
Term
Average
Average
Average
Nominal
Average
Min
Min
Min
Max
Max
9.94906
9.99906
10.02406 10.02506 10.02706 10.05206
7.94925
7.99925
8.01925
8.02005
8.01925
8.03925
7.44930
7.49930
7.51805
7.51880
7.52029
7.53904
5.94943
5.99943
6.01443
6.01504
6.01510
6.03010
4.94953
4.99953
5.01203
5.01253
5.01353
5.02603
3.69965
3.74965
3.75902
3.75940
3.75887
3.76825
2.94972
2.99972
3.00722
3.00752
3.00755
3.01505
2.44977
2.49977
2.50602
2.50627
2.50676
2.51301
1 Clock
+c2c
jitter
AbsPer
Max
10.10206
8.08925
7.58904
6.08010
5.07603
3.81825
3.06505
2.56301
Units
Notes
ns
ns
ns
ns
ns
ns
ns
ns
1,2
1,2
1,2
1,2
1,2
1,2
1,2
1,2
Guaranteed by design and characterization, not 100% tested in production.
All ppm specifications are guaranteed with the assumption that the REF output is tuned to the exact target XTAL frequency.
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
10
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
General SMBus serial interface information for the 9FG430
How to Write:
How to Read:
Controller (host) sends a start bit.
Controller (host) sends the write address DC (H)
IDT clock will acknowledge
Controller (host) sends the begining byte location = N
IDT clock will acknowledge
Controller (host) sends the data byte count = X
IDT clock will acknowledge
Controller (host) starts sending Byte N through
Byte N + X -1
(see Note 2)
• IDT clock will acknowledge each byte one at a time
• Controller (host) sends a Stop bit
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Index Block Read Operation
Index Block Write Operation
Controlle r (Host)
starT bit
T
Slave Address DC(H )
W Rite
WR
Controller (host) will send start bit.
Controller (host) sends the write address DC (H)
IDT clock will acknowledge
Controller (host) sends the begining byte
location = N
IDT clock will acknowledge
Controller (host) will send a separate start bit.
Controller (host) sends the read address DD (H)
IDT clock will acknowledge
IDT clock will send the data byte count = X
IDT clock sends Byte N + X -1
IDT clock sends Byte 0 through byte X (if X(H)
was written to byte 8).
Controller (host) will need to acknowledge each byte
Controllor (host) will send a not acknowledge bit
Controller (host) will send a stop bit
Controlle r (Host)
T
starT bit
Slave Address DC(H )
WR
W Rite
IDT (Sla ve /Re ce ive r)
IDT (Sla ve /Re ce ive r)
ACK
ACK
Beginning Byte = N
Beginning Byte = N
ACK
ACK
RT
Repeat starT
Slave Address DD(H )
RD
ReaD
Data Byte Count = X
ACK
Beginning Byte N
ACK
X Byte
ACK
Data Byte Count = X
ACK
Beginning Byte N
Byte N + X - 1
ACK
X Byte
ACK
P
stoP bit
Byte N + X - 1
N
P
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
11
Not acknowledge
stoP bit
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
SMBus Table: Device Control Register, READ/WRITE ADDRESS (DC/DD)
Byte 0
Bit 7
Pin #
17
Name
FS31
Control Function
Type
RW
0
1
Default
Pin 17
Bit 6
6
FS21
RW
Bit 5
Bit 4
24
25
FS11
FS01
RW
RW
Bit 3
16
Spread Enable1
RW
Bit 2
-
Enable Software Control of Frequency, Spread Enable
(Spread Type always Software Control)
RW
Bit 1
DIF_STOP# drive mode
RW
Driven
Hi-Z
0
Bit 0
SPREAD TYPE
RW
Down
Center
0
0
1
Default
See Frequency Selection Table,
Page 1
Off
On
Pin 6
Pin 24
Pin 25
Pin 16
Hardware Select Software Select
0
Notes:
1. These bits reflect the state of the corresponding pins at power up, but may be written to
if Byte 0, bit 2 is set to '1'. FS3 is the SEL14M_25M# pin.
SMBus Table: Output Enable Register
Byte 1
Pin #
Bit 7
-
Bit 6
-
DIF_3 EN
Output Enable
RW
Disable
Enable
1
Bit 5
-
DIF_2 EN
Output Enable
RW
Disable
Enable
1
Bit 4
-
Bit 3
-
Bit 2
-
DIF_1 EN
Output Enable
RW
Disable
Enable
1
Bit 1
-
DIF_0 EN
Output Enable
RW
Disable
Enable
1
Bit 0
-
Name
Control Function
Type
Reserved
1
1
Reserved
1
Reserved
Reserved
1
SMBus Table: Output Stop Control Register
Byte 2
Pin #
Bit 7
-
Bit 6
Name
Control Function
Type
0
1
Default
-
DIF_3 STOP EN
Free Run/ Stop Enable
RW
Free-run
Stop-able
Bit 5
-
DIF_2 STOP EN
Bit 4
-
Free Run/ Stop Enable
RW
Free-run
Stop-able
Bit 3
-
Bit 2
-
DIF_1 STOP EN
Free Run/ Stop Enable
RW
Free-run
Stop-able
Bit 1
-
DIF_0 STOP EN
Free Run/ Stop Enable
RW
Free-run
Stop-able
Bit 0
-
0
Reserved
0
Reserved
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
12
0
0
Reserved
Reserved
0
0
0
0
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
SMBus Table: Frequency Select Readback Register
Byte 3
Pin #
Name
Control Function
Type
Bit 7
27
SEL14M_25M#1
(FS3)
State of pin 17
R
Bit 6
6
FS21
State of pin 6
R
Bit 5
44
FS11
State of pin 24
R
Bit 4
45
FS01
State of pin 25
R
Bit 3
16
SPREAD1
State of pin 26
R
0
1
Default
Pin 17
See Frequency Selection Table,
Page 1
Pin 6
Pin 24
Pin 25
Off
On
Pin 16
Bit 2
Reserved
0
Bit 1
Reserved
0
Bit 0
Reserved
0
Notes:
1. These bits reflect the state of the corresponding pins, regardless of whether software
programming is enabled or not.
SMBus Table: Vendor & Revision ID Register
Byte 4
Pin #
Name
Bit 7
-
Bit 6
-
Bit 5
-
RID1
Bit 4
-
RID0
R
-
-
0
Bit 3
-
VID3
R
-
-
0
Bit 2
-
VID2
R
-
-
0
Bit 1
-
VID1
R
-
-
0
Bit 0
-
VID0
R
-
-
1
Control Function
Type
0
1
Default
RID3
R
-
-
0
RID2
R
-
-
0
R
-
-
0
REVISION ID
VENDOR ID
SMBus Table: DEVICE ID
Byte 5
Pin #
Name
Type
0
1
Default
Bit 7
-
DID7
R
-
-
0
Bit 6
-
DID6
R
-
-
0
Bit 5
-
DID5
R
-
-
0
Bit 4
-
DID4
R
-
-
0
Bit 3
-
DID3
R
-
-
0
Bit 2
-
DID2
R
-
-
0
Bit 1
-
DID1
R
-
-
0
Bit 0
-
DID0
R
-
-
1
Control Function
Device ID = 01 hex
SMBus Table: Byte Count Register
Byte 6
Pin #
Name
Type
0
1
Default
Bit 7
-
BC7
RW
-
-
0
Bit 6
-
BC6
RW
-
-
0
Bit 5
-
BC5
RW
-
-
0
Bit 4
-
BC4
RW
-
-
0
Bit 3
-
BC3
RW
-
-
0
Bit 2
-
BC2
RW
-
-
1
Bit 1
-
BC1
RW
-
-
1
Bit 0
-
BC0
RW
-
-
1
Control Function
Writing to this register will
configure how many bytes will
be read back, default is 07 = 7
bytes.
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
13
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
SMBus Table: Reserved Register
Byte 7
Pin #
Bit 7
-
Reserved
0
Bit 6
-
Reserved
0
Bit 5
-
Reserved
0
Bit 4
-
Reserved
0
Bit 3
-
Reserved
0
Bit 2
-
Reserved
0
Bit 1
-
Reserved
0
Bit 0
-
Reserved
0
Name
Control Function
Type
0
1
Default
SMBus Table: Reserved Register
Byte 8
Pin #
Bit 7
-
Reserved
0
Bit 6
-
Reserved
0
Bit 5
-
Reserved
0
Bit 4
-
Reserved
0
Bit 3
-
Reserved
0
Bit 2
-
Reserved
0
Bit 1
-
Reserved
0
Bit 0
-
Reserved
0
Name
Control Function
Type
0
1
Default
SMBus Table: M/N Programming Enable
Byte 9
Pin #
Name
Control Function
Type
0
1
Default
Bit 7
-
M/N_Enable
M/N Prog. Enable
RW
Disable
Enable
0
Bit 6
-
Bit 5
5
Bit 4
-
Bit 3
Bit 2
Reserved
REFOUT_En
REFOUT Enable
1
RW
Disable
Enable
1
Reserved
0
-
Reserved
0
-
Reserved
0
Bit 1
-
Reserved
0
Bit 0
-
Reserved
0
SMBus Table: PLL Frequency Control Register
Byte 10
Pin #
Name
Control Function
Type
Bit 7
-
PLL N Div8
N Divider Prog bit 8
RW
Bit 6
-
PLL N Div9
N Divider Prog bit 9
RW
Bit 5
-
PLL M Div5
Bit 4
-
PLL M Div4
Bit 3
-
PLL M Div3
Bit 2
-
PLL M Div2
Bit 1
-
PLL M Div1
RW
Bit 0
-
PLL M Div0
RW
RW
RW
M Divider Programming
bit (5:0)
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
14
RW
RW
0
1
Default
The decimal representation of M
and N Divider in Byte 10 and 11 will
configure the PLL VCO frequency.
Default at power up = latch-in or
Byte 0 Rom table. VCO Frequency
= fXTAL x [NDiv(9:0)+8] /
[MDiv(5:0)+2]. The user does NOT
need to program these resgisters
for standard frequencies.
X
X
X
X
X
X
X
X
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
SMBus Table: PLL Frequency Control Register
Byte 11
Pin #
Name
Bit 7
-
PLL N Div7
RW
Bit 6
-
PLL N Div6
RW
Bit 5
-
PLL N Div5
RW
Bit 4
-
PLL N Div4
Bit 3
-
PLL N Div3
Bit 2
-
PLL N Div2
RW
Bit 1
-
PLL N Div1
RW
Bit 0
-
PLL N Div0
RW
Control Function
N Divider Programming
Byte11 bit(7:0) and Byte10
bit(7:6)
Type
RW
RW
0
1
Default
The decimal representation of M
and N Divider in Byte 10 and 11 will
configure the PLL VCO frequency.
Default at power up = latch-in or
Byte 0 Rom table. VCO Frequency
= fXTAL x [NDiv(9:0)+8] /
[MDiv(5:0)+2]. The user does NOT
need to program these resgisters
for standard frequencies.
X
X
X
X
X
X
X
X
SMBus Table: PLL Spread Spectrum Control Register
Byte 12
Pin #
Name
Control Function
Type
Bit 7
-
PLL SSP7
RW
Bit 6
-
PLL SSP6
RW
Bit 5
-
PLL SSP5
Bit 4
-
PLL SSP4
Bit 3
-
PLL SSP3
Bit 2
-
PLL SSP2
RW
Bit 1
-
PLL SSP1
RW
Bit 0
-
PLL SSP0
RW
RW
Spread Spectrum
Programming bit(7:0)
RW
RW
0
1
Default
These Spread Spectrum bits in
Byte 12 and 13 will program the
spread pecentage of PLL. The
user does not need to modify
these settings unless nonstandard spread amounts are
required. The part defaults to 0.5% spread when spread is
enabled.
X
X
X
X
X
X
X
X
SMBus Table: PLL Spread Spectrum Control Register
Byte 13
Pin #
Bit 7
-
Bit 6
-
PLL SSP14
RW
Bit 5
-
PLL SSP13
RW
Bit 4
-
PLL SSP12
Name
Control Function
Type
0
1
Default
Reserved
0
RW
Spread Spectrum
Programming bit(14:8)
Bit 3
-
PLL SSP11
Bit 2
-
PLL SSP10
RW
Bit 1
-
PLL SSP9
RW
Bit 0
-
PLL SSP8
RW
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
15
RW
These Spread Spectrum bits in
Byte 12 and 13 will program the
spread pecentage of PLL. The
user does not need to modify
these settings unless nonstandard spread amounts are
required. The part defaults to 0.5% spread when spread is
enabled.
X
X
X
X
X
X
X
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
28-Pin SSOP Package Drawing and Dimensions
209 mil SSOP
c
N
SYMBOL
L
E1
A
A1
A2
b
c
D
E
E1
e
L
N
α
E
INDEX
AREA
1 2
α
h x 45°
D
In Millimeters
COMMON DIMENSIONS
MIN
MAX
-2.00
0.05
-1.65
1.85
0.22
0.38
0.09
0.25
SEE VARIATIONS
7.40
8.20
5.00
5.60
0.65 BASIC
0.55
0.95
SEE VARIATIONS
0°
8°
In Inches
COMMON DIMENSIONS
MIN
MAX
-.079
.002
-.065
.073
.009
.015
.0035
.010
SEE VARIATIONS
.291
.323
.197
.220
0.0256 BASIC
.022
.037
SEE VARIATIONS
0°
8°
VARIATIONS
N
A
28
-Cb
D (inch)
MAX
10.50
MIN
.390
MAX
.413
Reference Doc.: JEDEC Publication 95, MO-150
A1
e
D mm.
MIN
9.90
10-0033
SEATING
PLANE
.10 (.004) C
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
16
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
28-Pin TSSOP Package Drawing and Dimensions
4.40 mm. Body, 0.65 mm. Pitch TSSOP
(173 mil)
c
N
SYMBOL
L
E1
A
A1
A2
b
c
D
E
E1
e
L
N
α
aaa
E
INDEX
AREA
1 2
α
D
(25.6 mil)
In Millimeters
COMMON DIMENSIONS
MIN
MAX
-1.20
0.05
0.15
0.80
1.05
0.19
0.30
0.09
0.20
SEE VARIATIONS
6.40 BASIC
4.30
4.50
0.65 BASIC
0.45
0.75
SEE VARIATIONS
0°
8°
-0.10
In Inches
COMMON DIMENSIONS
MIN
MAX
-.047
.002
.006
.032
.041
.007
.012
.0035
.008
SEE VARIATIONS
0.252 BASIC
.169
.177
0.0256 BASIC
.018
.030
SEE VARIATIONS
0°
8°
-.004
VARIATIONS
A
A2
N
28
D mm.
MIN
9.60
D (inch)
MAX
9.80
MIN
.378
MAX
.386
A1
- Ce
b
Reference Doc.: JEDEC Publication 95, MO-153
SEATING
PLANE
10-0035
aaa C
Ordering Information
Part / Order Number Shipping Packaging
9FG430AFLF
Tubes
9FG430AFLFT
Tape and Reel
9FG430AFILF
Tubes
9FG430AFILFT
Tape and Reel
9FG430AGLF
Tubes
9FG430AGLFT
Tape and Reel
9FG430AGILF
Tubes
9FG430AGILFT
Tape and Reel
Package
28-pin SSOP
28-pin SSOP
28-pin SSOP
28-pin SSOP
28-pin TSSOP
28-pin TSSOP
28-pin TSSOP
28-pin TSSOP
Temperature
0 to +70°C
0 to +70°C
-40 to +85°C
-40 to +85°C
0 to +70°C
0 to +70°C
-40 to +85°C
-40 to +85°C
“LF” suffix to the part num ber are the Pb-Free configuration and are RoHS com pliant.
“A” is the device revision designator (w ill not correlate w ith the datasheet revision).
IDT® Four Output Differential Frequency Generator for PCIe Gen3 and QPI
17
1681D—04/04/17
9FG430
Four Output Differential Frequency Generator for PCIe Gen3 and QPI
Revision History
Rev.
0.1
A
B
C
D
Issue Date Who Description
Page #
7/13/2010 RDW New datasheet.
7/13/2010 RDW Release
1. Added PPM tables to DS for both 25M and 14.318M inputs
7/20/2010 RDW
2. Added Test load figures
1. Updated/reformatted Electrical Tables
2. Corrected Features/Benefits and General Description
8/25/2010 RDW 3. Updated pull up ^ and pull down v indicators.
1, Various
4. Updated termination figures to include Fig. 5 for REF output, merged test
load figures into these figures.
4/4/2017
RDW 1. Corrected Byte 5 Device ID from 43 hex to 01 hex
13
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18
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