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ICS9LPRS480 Datasheet(PDF) 1 Page - Integrated Device Technology

Part # ICS9LPRS480
Description  Programmable System Clock Chip for ATI RS780 - K8TM based Systems
PDF  25 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

ICS9LPRS480 Datasheet(HTML) 1 Page - Integrated Device Technology

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Integrated
Circuit
Systems, Inc.
ICS9LPRS480
1391D—02/02/09
Pin Configuration
Recommended Application:
ATI RS780 systems using AMD K8 processors
Output Features:
•
Integrated series resistors on all differential outputs.
•
1 - Greyhound compatible K8 CPU pairs
•
5 - low-power differential SRC pairs
•
2 - low-power differential chipset SouthBridge SRC pairs
•
1 - Selectable low-power differential 100MHz non-spread
SATA/ SRC output
•
1 - Selectable low-power differential SRC / 27MHz Single
Ended outputs
•
1 - Selectable HT3 100MHz low-power differential
hypertransport clock / HT66MHz Single Ended outputs
•
1 - 48MHz USB clock
•
3 - 14.318MHz Reference clock
•
2 - low-power differential ATIG pairs
•
5- Dedicated CLKREQ# pins
Programmable System Clock Chip for ATI RS780 - K8
TM based Systems
*Other names and brands may be claimed as the property of others.
Key Specifications:
•
CPU outputs cycle-to-cycle jitter < 150ps
•
SRC outputs cycle-to-cycle jitter < 125ps
•
SB_SRC outputs cycle-to-cycle jitter < 125ps
•
+/- 100ppm frequency accuracy on CPU, SRC, ATIG
•
0ppm frequency accuracy on 48MHz
Features/Benefits:
•
Power Saving Features:
Optional Separate supply rail for SRC low Voltage I/O
- ~33% power saving when 1.5V is used for this rail
•
Spread Spectrum for EMI reduction
•
Outputs may be disabled via SMBus
•
External crystal load capacitors for maximum
frequency accuracy
64 63
62
61
60 59 58
57
56
55
54
53
52
51
50
49
GND48 1
48 VDDCPU
SMBCLK 2
47 VDDCPU_IO
SMBDAT 3
46 GNDCPU
VDD 4
45 CLKREQ1#*
SRC7C_LPRS/27MHz_NS 5
44 CLKREQ2#*
SRC7T_LPRS/27MHz_SS 6
43 GNDSATA
GND 7
42 SRC6T/SATAT_LPRS
SRC4C_LPRS 8
41 SRC6C/SATAC_LPRS
SRC4T_LPRS 9
40 VDDSATA
GNDSRC 10
39 CLKREQ3#*
VDDSRC_IO 11
38 CLKREQ4#*
SRC3C_LPRS 12
37 SB_SRC0T_LPRS
SRC3T_LPRS 13
36 SB_SRC0C_LPRS
SRC2C_LPRS 14
35 VDDSB_SRC
SRC2T_LPRS 15
34 VDDSB_SRC_IO
VDDSRC 16
33 GNDSB_SRC
17 18
19
20
21 22 23
24
25
26
27
28
29
30
31
32
ICS9LPRS480


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