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PDF ICS9FG1904B-1 Data sheet ( Hoja de datos )
| Número de pieza | ICS9FG1904B-1 | |
| Descripción | Frequency Generator | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Integrated
Circuit
Systems, Inc.
ICS9FG1904B-1
Frequency Generator for CPU, PCIe Gen 1, PCIe Gen 2 & FBD
Recommended Application:
DB1900GS/GSO with 15:4 output grouping
Features:
• Power up default is all outputs in 1:1 mode
• DIF_(14:0) can be “gear-shifted” from the input CPU
Host Clock
• DIF_(18:15) can be “gear-shifted” from the input CPU
Host Clock
• Spread spectrum compatible
• Supports output clock frequencies up to 400 MHz
• 8 Selectable SMBus addresses
• SMBus address determines PLL or Bypass mode
Key Specifications:
• DIF output cycle-to-cycle jitter < 50ps
• DIF output-to-output skew < 100ps within a group
Functionality at Power Up (PLL Mode)
FS_A_4101
1
0
CLK_IN (CPU FSB)
MHz
100 <= CLK_IN < 200
200<= CLK_IN <= 400
DIF_(18:0)
MHz
CLK_IN
CLK_IN
1. FS_A_410 is a low-threshold input. Please see the VIL_FS and VIH_FS
specifications in the Input/Supply/Common Output Parameters Table for
correct values.
Power Down Functionality
INPUTS
CKPWRGD/ CLK_IN/
PD#
CLK_IN#
1 Running
0X
OUTPUTS
DIF/DIF#
Running
Hi-Z
PLL State
ON
OFF
Pin Configuration
IREF
GNDA
VDDA
HIGH_BW#
FS_A_410
DIF_0
DIF_0#
DIF_1
DIF_1#
GND
VDD
DIF_2
DIF_2#
DIF_3
DIF_3#
DIF_4
DIF_4#
OE_01234#
72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55
1
2
3
4
5
6
7
8
9
10
ICS9FG1904-1
11
12
13
14
15
16
17
18
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
54 OE14#
53 DIF_13#
52 DIF_13
51 OE13#
50 DIF_12#
49 DIF_12
48 OE12#
47 VDD
46 GND
45 DIF_11#
44 DIF_11
43 OE11#
42 DIF_10#
41 DIF_10
40 OE10#
39 DIF_9#
38 DIF_9
37 OE9#
1255B—08/03/07
72-pin MLF
Other names and brands may be claimed as the property of others.
1 page  
Integrated
Circuit
Systems, Inc.
ICS9FG1904B-1
ICS 9FG1904B-1 Programmable Gear Ratios
CLK_IN Geared DIF
(CPU FSB) Outputs M n Gear
MHz
MHz
Ratio n/M
(FS_A_410#)
Byte 0,
bit 4
FS4
100.00
133.33 3 4 1.333
0
100.00
166.67 3 5 1.667
0
100.00
200.00 1 2 2.000
0
100.00
266.67 3 8 2.667
0
100.00
333.33 3 10 3.333
0
100.00
400.00 1 4 4.000
0
133.33
133.33
133.33
133.33
133.33
166.67
200.00
266.67
333.33
100.00
45
23
12
25
43
1.250
1.500
1.250
1.500
0.750
0
0
0
0
0
166.67
166.67
166.67
160/
166.67
166.67
133.33
200.00
266.67
320/
333.33
400.00
54
56
58
12
5 12
0.800
1.200
1.600
2.000
2.400
0
0
0
0
0
200.00
200.00
200.00
200.00
200.00
133.33
166.67
266.67
333.33
400.00
32
65
34
35
12
0.667
0.833
1.333
1.667
2.000
1
1
1
1
1
266.67
266.667/
320.00
266.67
133.33
166.67/
200.00
200.00
21
85
43
0.500
0.625
0.750
1
1
1
333.33
320/
333.33
333.33
133.33
160/
166.67
200.00
52
21
53
0.400
0.500
0.600
1
1
1
400.00
400.00
400.00
400.00
400.00
133.33
160.00
166.67
320.00
333.33
31
52
12 5
54
65
0.333
0.400
0.417
0.800
0.833
1
1
1
1
1
Notes:
1. Targetted input/output frequency pairs
2. This Gear is also used for 160MHz/320 MHz.
3. Gear Ratio 5/4 is power up default for FS_A_410 = 1
4. Gear Ratio 3/1 is power up default for FS_A_410 = 0
5. This Gear is also used for 400MHz/200MHz
6. This Gear is also used for 320MHz/200MHz
1255B—08/03/07
Byte 0, Byte 0, Byte 0, Byte 0,
bit 3 bit 2 bit 1 bit 0 Notes
FS3 FS2 FS1 FS0
0000
0001
0010
0011
0100
0101
0110 1
0111 1
1000
1001
1010
1 0 1 1 1,3
1100 1
1101
1 1 1 0 1,2
1111
0000 1
0001 1
0010 1
0011 1
0100 1
0101 1
0 1 1 0 1, 6
0111 1
1000 1
1 0 0 1 1,5
1010 1
1 0 1 1 1,4
1100 1
1101 1
1110 1
1111 1
5
5 Page 
Integrated
Circuit
Systems, Inc.
ICS9FG1904B-1
GS Gear Ratios
GSO Gear Ratios
9FG1904-1 Gear Ratios
CLK_IN
(CPU FSB)
MHz
Geared DIF
Outputs
MHz
M
n
Gear
Ratio
n/M
CLK_IN
(CPU FSB)
MHz
Geared
DIF
Outputs
MHz
M
n
Gear
Ratio
n/M
CLK_IN
(CPU FSB)
MHz
Geared
DIF
Outputs
MHz
M
n
Gear
Ratio
n/M
1 100.00
133.33 3 4 1.33 100.00 133.33 3 4 1.33 100.00 133.33 3 4 1.33
2 100.00
166.67 3 5 1.67 100.00 166.67 3 5 1.67 100.00 166.67 3 5 1.67
3 100.00
200.00 1 2 2.00 100.00 200.00 1 2 2.00 100.00 200.00 1 2 2.00
4 100.00
5 100.00
266.67
333.33
3 8 2.67
3 10 3.33
100.00
100.00
266.67 3 8 2.67
333.33 3 10 3.33
100.00
100.00
266.67 3 8 2.67
333.33 3 10 3.33
6 100.00
400.00 1 4 4.00 133.33 100.00 4 3 0.75 100.00 400.00 1 4 4.00
7 133.33
8 133.33
166.67
200.00
4 5 1.25
2 3 1.50
133.33
133.33
166.67 4 5 1.25
200.00 2 3 1.50
133.33
133.33
166.67 4 5 1.25
200.00 2 3 1.50
9 133.33
266.67 1 2 1.25 133.33 266.67 1 2 2.00 133.33 266.67 1 2 1.25
10 133.33
11 133.33
333.33
400.00
2 5 1.50
1 3 3.00
133.33
133.33
333.33 2 5 2.50
400.00 1 3 3.00
133.33
133.33
333.33 2 5 1.50
100.00 4 3 0.75
12 166.67
13 166.67
133.33
200.00
5 4 0.80
5 6 1.20
166.67
166.67
133.33 5 4 0.80
200.00 5 6 1.20
166.67
166.67
133.33 5 4 0.80
200.00 5 6 1.20
14 166.67
160/
15 166.67
16 166.67
266.67
320/
333.33
400.00
5 8 1.60
1 2 2.00
5 12 2.40
166.67
166.67
166.67
266.67
333.33
400.00
5 8 1.60
1 2 2.00
5 12 2.40
166.67
160/
166.67
166.67
266.67
320/
333.33
400.00
5 8 1.60
1 2 2.00
5 12 2.40
17 200.00
133.33 3 2 0.67 200.00 133.33 3 2 0.67 200.00 133.33 3 2 0.67
18 200.00
166.67 6 5 0.83 200.00 166.67 6 5 0.83 200.00 166.67 6 5 0.83
19 200.00
266.67 3 4 1.33 200.00 266.67 3 4 1.33 200.00 266.67 3 4 1.33
20 200.00
21 200.00
333.33
400.00
3 5 1.67
1 2 2.00
200.00
200.00
333.33 3 5 1.67
400.00 1 2 2.00
200.00
200.00
333.33 3 5 1.67
400.00 1 2 2.00
22 266.67
266.667/
23 320
24 266.67
133.33
166.67/
200
200.00
21
85
43
0.50
0.63
0.75
266.67
266.67
266.67
133.33 2 1 0.50
166.67 8 5 0.63
200.00 4 3 0.75
266.67
266.667/
320.00
266.67
133.33 2 1 0.50
166.67/
200.00 8 5 0.63
200.00 4 3 0.75
25 333.33
320/
26 333.33
27 333.33
133.33
160/
166.67
200.00
52
21
53
0.40
0.50
0.60
333.33
333.33
333.33
133.33 5 2 0.40
166.67 2 1 0.50
200.00 5 3 0.60
333.33
320/
333.33
333.33
133.33 5 2 0.40
160/
166.67
2
1
0.50
200.00 5 3 0.60
28 400.00
133.33 3 1 0.33 400.00 133.33 3 1 0.33 400.00 133.33 3 1 0.33
29 400.00
160.00 5 2 0.40 400.00 166.67 12 5 0.42 400.00 160.00 5 2 0.40
30 400.00
31 400.00
32 400.00
166.67
320.00
333.33
12 5
54
65
0.42
0.80
0.83
400.00
400.00
400.00
200.00
266.67
333.33
21
64
65
0.50
0.67
0.83
400.00
400.00
400.00
166.67 12 5
320.00 5 4
333.33 6 5
0.42
0.80
0.83
Figure 1 GS versus GSO versus 9FG1904B-1 Gear Ratios
1255B—08/03/07
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ICS9FG1904B-1.PDF ] | |
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