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Numéro de référence | ICS9FG108 | ||
Description | Programmable FTG for Differential P4 CPU | ||
Fabricant | Integrated Circuit Systems | ||
Logo | |||
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www.DataSheet4U.com
Integrated
Circuit
Systems, Inc.
ICS9FG108
Programmable FTG for Differential P4TM CPU, PCI-Express & SATA Clocks
Recommended Application:
Pin Configuration
Frequency Timing Generator for Differential CPU, PCI-
Express & SATA clocks
XIN/CLKIN 1
X2 2
Features:
• Generates common frequencies from 14.318 MHz or
25 MHz
• Crystal or reference input
VDD
GND
REFOUT
FS2
OE_7**
3
4
5
6
7
• 8 - 0.7V current-mode differential output pairs
• Supports Serial-ATA at 100 MHz
• Two spread spectrum modes: 0 to -0.5 downspread
and +/-0.25% centerspread
• Unused inputs may be disabled in either driven or Hi-
Z state for power management.
• Programmable OE Polarity
DIF_7 8
DIF_7# 9
VDD 10
DIF_6 11
DIF_6# 12
OE_6* 13
VDD 14
GND 15
• M/N Programming
OE_5* 16
DIF_5 17
Key Specifications:
• Output cycle-to-cycle jitter < 50 ps
DIF_5# 18
VDD 19
DIF_4 20
• Output to output skew < 65 ps
• +/-300 ppm frequency accuracy on output clocks
• +/-150 ppm frequency accuracy @100 MHz outputs
DIF_4# 21
OE_4** 22
SDATA 23
SCLK 24
48 VDDA
47 GNDA
46 IREF
45 FS0
44 FS1
43 OE_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 OE_3**
27 SEL14M_25M#
26 SPREAD
25 DIF_STOP#
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
266.66
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
266.66
1
110
333.33
1
111
400.00
Note:
Pin names followed by '**' have 120 Kohm pull DOWN resistors
Pin names followed by '*' have 120 Kohm pull UP resistors
48-pin SSOP & TSSOP
0823E—04/13/06
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Pages | Pages 17 | ||
Télécharger | [ ICS9FG108 ] |
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