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9FG104EGLFT

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
DATASHEET
FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA
ICS9FG104E
IDT®
FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA 1
ICS9FG104E REV D 102912
Description
The ICS9FG104E is a frequency generator that provides 4
differential HCSL output pairs. It can be used to drive PCIe
Gen1/2, SATA and USB3.0 devices. The part can use
either a 14.31818 MHz or 25 MHz crystal. The 9FG104E
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.
Recommended Application
Frequency Generator for CPU, PCIe Gen1/2, SATA and
USB3.0
Output Features
• 4 - HCSL differential outputs
• 1 - 3.3V REF output (either 14.318M or 25M depending
on XTAL)
Features/Benefits
• Generates common frequencies from 14.318MHz or
25MHz
• Crystal or reference input
• 4 - 0.7V current-mode HCSL output pairs
• Supports Serial-ATA at 100MHz
• Two spread spectrum modes: -0.5% down spread and
+/-0.25% center spread; Lower EMI
• 31.5KHz spread modulation rate; passes USB3
compliance testing
• Unused outputs may be disabled in either driven or Hi-Z
state for power manangement
• I-temp version available; supports embedded
applications
Key Specifications
• Cycle to cycle jitter: < 50ps
• Phase jitter: PCIe Gen1/2 <3ps rms
• Output to output skew <35ps
• +/-300 ppm frequency accuracy on output clocks
• +/-50ppm on all output frequencies with Spread Off
Block Diagram
STOP
LOGIC
XIN/CLKIN
X2
DIF(3:0)
CONTROL
LOGIC
SPREAD
FS(2:0)
SDATA
SCLK
SEL14M_25M#
DIF_STOP#
PROGRAMMABLE
SPREAD PLL
4
IREF
2
OSC
R
E
F
O
U
T
ICS9FG104E
FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA
IDT®
FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA 2
ICS9FG104E REV D 102912
Pin Configuration
Power Groups
Frequency Select Table
XIN/CLKIN 1 28 VDDA
X2 2 27 GNDA
VDD 3 26 IREF
GND 4 25 vFS0
REFOUT 5 24 vFS1
vFS2 6 23 DIF_0
DIF_3 7 22 DIF_0#
DIF_3# 8 21 VDD
VDD 9 20 GND
GND 10 19 DIF_1
DIF_2 11 18 DIF_1#
DIF_2# 12 17 ^SEL14M_25M#
SDATA 13 16 vSPREAD
SCLK 14 15 DIF_STOP#
9FG104E
^ Pin has internal 120K pull up
v Pin has internal 120K pull down
VDD GND
34
9,21 10,20
28 27 IREF, Analog VDD, GND for PLL Core
Descri
p
tion
Pin Number
REFOUT, Digital Inputs
DIF Outputs
SEL14M_25M#
(FS3)
FS2 FS1 FS0 OUTPUT(MHz)
0 0 0 0 100.00
0 0 0 1 125.00
0 0 1 0 133.33
0 0 1 1 166.67
0 1 0 0 200.00
0 1 0 1 266.00
0 1 1 0 333.00
0 1 1 1 400.00
1 0 0 0 100.00
1 0 0 1 125.00
1 0 1 0 133.33
1 0 1 1 166.67
1 1 0 0 200.00
1 1 0 1 266.00
1 1 1 0 333.00
1 1 1 1 400.00
ICS9FG104E
FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA
IDT®
FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA 3
ICS9FG104E REV D 102912
Pin Descriptions
PIN # PIN NAME PIN TYPE DESCRIPTION
1 XIN/CLKIN IN Crystal input or Reference Clock input
2 X2 OUT Crystal output, Nominally 14.318MHz
3 VDD PWR Power supply, nominal 3.3V
4 GND PWR Ground pin.
5 REFOUT OUT Reference Clock output
6 vFS2 IN Frequency select pin. This pin has an internal 120k pull down resistor
7 DIF_3 OUT 0.7V differential true clock output
8 DIF_3# OUT 0.7V differential Complementary clock output
9 VDD PWR Power supply, nominal 3.3V
10 GND PWR Ground pin.
11 DIF_2 OUT 0.7V differential true clock output
12 DIF_2# OUT 0.7V differential Complementary clock output
13 SDATA I/O Data pin for SMBus circuitry, 3.3V tolerant.
14 SCLK IN Clock pin of SMBus circuitry, 5V tolerant.
15 DIF_STOP# IN Active low input to stop differential output clocks.
16 vSPREAD IN
Asynchronous, active high input to enable spread spectrum functionality. This pin
has a 120Kohm pull down resistor.
17 ^SEL14M_25M# IN
Select 14.31818 MHz or 25 Mhz input frequency. This pin has an internal 120kohm
pull up resistor.
1 = 14.31818 MHz, 0 = 25 MHz
18 DIF_1# OUT 0.7V differential Complementary clock output
19 DIF_1 OUT 0.7V differential true clock output
20 GND PWR Ground pin.
21 VDD PWR Power supply, nominal 3.3V
22 DIF_0# OUT 0.7V differential Complementary clock output
23 DIF_0 OUT 0.7V differential true clock output
24 vFS1 IN 3.3V Frequency select latched input pin with internal 120kohm pull down resistor.
25 vFS0 IN 3.3V Frequency select latched input pin with internal 120kohm pull down resistor.
26 IREF OUT
This pin establishes the reference current for the differential current-mode output
pairs. This pin requires a fixed precision resistor tied to ground in order to establish
the appropriate current. 475 ohms is the standard value.
27 GNDA PWR Ground pin for the PLL core.
28 VDDA PWR 3.3V power for the PLL core.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

9FG104EGLFT

Mfr. #:
Buy 9FG104EGLFT
Manufacturer:
IDT
Description:
Clock Synthesizer / Jitter Cleaner 4 O/P PCIE GEN2 SYNTHESIZER
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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