ICS9FG107 Datasheet, PDF (1/14 Pages) Integrated Circuit Systems – Programmable FTG for Differential CPU, PCI Express & SATA Clocks

Integrated
Circuit
Systems, Inc.
ICS9FG107
Programmable FTG for Differential CPU, PCI Express* & SATA Clocks
Recommended Application:
Pin Configuration
Frequency Timing Generator for Differential CPU, PCI Express
& SATA clocks
XIN/CLKIN 1
X2 2
48 VDDA
47 GNDA
Features:
VDD 3
46 IREF
• Generates common CPU/PCI Express frequencies from
14.318 MHz or 25 MHz
• Crystal or reference input
• 7 - 0.7V current-mode differential output pairs
• 3 - 33MHz PCI outputs
• 1 - REFOUT
• 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.
GND 4
*FS2/REFOUT 5
GND 6
*FS0/PCICLK_F 7
PCICLK0 8
PCICLK1 9
VDD 10
**OE_6 11
DIF_6 12
DIF_6# 13
45 *DWNSPRD#
44 **FS1
43 *OE_0
42 DIF_0
41 DIF_0#
40 VDD
39 DIF_1
38 DIF_1#
37 **OE_1
36 VDD
VDD 14
35 GND
Key Specifications:
GND 15
34 **OE_2
• Output cycle-to-cycle jitter for DIF outputs < 50 ps (<85ps
@ 266 MHz)
• Output to output skew for DIF outputs < 85 ps
• +/-300 ppm frequency accuracy on output clocks
**OE_5 16
DIF_5 17
DIF_5# 18
VDD 19
33 DIF_2
32 DIF_2#
31 VDD
30 DIF_3
DIF_4 20
29 DIF_3#
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
DIF_4# 21
*OE_4 22
SDATA 23
SCLK 24
28 *OE_3
27 **SEL14M_25M#
26 *SPREAD
25 DIF_STOP#
Notes:
48-pin SSOP & TSSOP
Pins preceeded by * have 120 Kohm pull DOWN resistors
Pins preceeded by ** have 120 Kohm pull UP resistors
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
0863C—11/22/04
*Other names and brands may be claimed as the property of others.