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9FG830 PDF даташит

Спецификация 9FG830 изготовлена ​​​​«IDT» и имеет функцию, называемую «Eight Output Differential Frequency Generator».

Детали детали

Номер произв 9FG830
Описание Eight Output Differential Frequency Generator
Производители IDT
логотип IDT логотип 

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9FG830 Даташит, Описание, Даташиты
DATASHEET
Eight Output Differential Frequency Generator
for PCIe Gen3 and QPI
9FG830
General Description:
The 9FG830 is a Frequency Timing Generator that provides 8
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 9FG830 also outputs a copy of the reference clock. Complete
control of the device is available via strapping pins or via the
SMBus interface.
Recommended Application:
8 Output Differential Output Frequency Generator for PCIe Gen3
and QPI
Features/Benefits:
• Pin-to-Pin with 9FG108D; 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
• Three spread spectrum modes: -0.5%, +/-0.25%, and off;
EMI reduction
• 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
Output Features:
• 8 - 0.7V current mode differential HCSL output pairs
• 1 - 3.3V LVTTL REF output
Key Specifications:
• Cycle-to-cycle jitter: < 50ps with 25MHz input
• Output-to-output skew: <50ps
• Phase jitter: PCIe Gen3 < 1ps rms
• Phase jitter: QPI 9.6GB/s < 0.2ps rms
• 10 ppm synthesis error with 25MHz input and Spread Off
Functional Block Diagram
XIN/CLKIN
X2
OE(7:0)
OSC
PROGRAMMABLE
SPREAD PLL
STOP
LOGIC
8
REFOUT
DIF(7:0)
SPREAD
SEL14M_25M#
DIF_STOP#
FS(2:0)
SDATA
SCLK
CONTROL
LOGIC
IREF
IDT® Eight Output Differential Frequency Generator for PCIe Gen3 and QPI
1
1680C—08/26/10









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9FG830 Даташит, Описание, Даташиты
9FG830
Eight Output Differential Frequency Generator for PCIe Gen3 and QPI
Pin Configuration
Power Groups
Pin Number
VDD
3
GND
4
10,14,19,31,36,40
N/A
15,35
47
48 47
XIN/CLKIN 1
X2 2
VDD 3
GND 4
REFOUT 5
vFS2 6
vOE_7 7
DIF_7 8
DIF_7# 9
VDD 10
DIF_6 11
DIF_6# 12
^OE_6 13
VDD 14
GND 15
^OE_5 16
DIF_5 17
DIF_5# 18
VDD 19
DIF_4 20
DIF_4# 21
vOE_4 22
SDATA 23
SCLK 24
48 VDDA
47 GNDA
46 IREF
45 vFS0
44 vFS1
43 vOE_0
42 DIF_0
41 DIF_0#
40 VDD
39 DIF_1
38 DIF_1#
37 ^OE_1
36 VDD
35 GND
34 ^OE_2
33 DIF_2
32 DIF_2#
31 VDD
30 DIF_3
29 DIF_3#
28 vOE_3
27 ^SEL14M_25M#
26 vSPREAD
25 DIF_STOP#
^ indicates internal 120K pull up
v indicates internal 120K pull down
Description
REFOUT, Digital Inputs, SMBus
DIF Outputs
IREF
Analog VDD & GND for PLL Core
Frequency Select 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
266.67
0
110
333.33
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
266.67
1
110
333.33
1
111
400.00
IDT® Eight Output Differential Frequency Generator for PCIe Gen3 and QPI
2
1680C—08/26/10









No Preview Available !

9FG830 Даташит, Описание, Даташиты
9FG830
Eight Output Differential Frequency Generator for PCIe Gen3 and QPI
Pin Description
PIN #
1
2
3
4
5
6
PIN NAME
XIN/CLKIN
X2
VDD
GND
REFOUT
vFS2
7 vOE_7
8 DIF_7
9 DIF_7#
10 VDD
11 DIF_6
12 DIF_6#
13 ^OE_6
14 VDD
15 GND
16 ^OE_5
17 DIF_5
18 DIF_5#
19 VDD
20 DIF_4
21 DIF_4#
22 vOE_4
23 SDATA
24 SCLK
25 DIF_STOP#
26 vSPREAD
PIN TYPE
IN
OUT
PWR
PWR
OUT
IN
IN
OUT
OUT
PWR
OUT
OUT
IN
PWR
PWR
IN
OUT
OUT
PWR
OUT
OUT
IN
I/O
IN
IN
IN
27 ^SEL14M_25M# IN
28 vOE_3
29 DIF_3#
30 DIF_3
IN
OUT
OUT
DESCRIPTION
Crystal input or Reference Clock input
Crystal output, Nominally 14.318MHz
Power supply, nominal 3.3V
Ground pin.
Reference Clock output
Frequency select pin. This pin has an internal 120k pull down resistor
Active high input for enabling output 7. This pin has a 120kohm pull down.
0 =disable outputs, 1= enable outputs
0.7V differential true clock output
0.7V differential Complementary clock output
Power supply, nominal 3.3V
0.7V differential true clock output
0.7V differential Complementary clock output
Active high input for enabling output 6. This pin has an internal 120kohm pull up.
0 = disable outputs, 1= enable outputs
Power supply, nominal 3.3V
Ground pin.
Active high input for enabling output 5. This pin has an internal 120kohm pull up.
0 = disable outputs, 1= enable outputs
0.7V differential true clock output
0.7V differential Complementary clock output
Power supply, nominal 3.3V
0.7V differential true clock output
0.7V differential Complementary clock output
Active high input for enabling output 4. This pin as an internal 120kohm pull down.
0 =disable outputs, 1= enable outputs
Data pin for SMBus circuitry, 5V tolerant.
Clock pin of SMBus circuitry, 5V tolerant.
Active low input to stop differential output clocks.
Asynchronous, active high input to enable spread spectrum functionality. This pin has
a 120Kohm pull down resistor.
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
Active high input for enabling output 3. This pin has an internal 120kohm pull down
resistor.
0 =disable outputs, 1= enable outputs
0.7V differential Complementary clock output
0.7V differential true clock output
IDT® Eight Output Differential Frequency Generator for PCIe Gen3 and QPI
3
1680C—08/26/10










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