ICS9LPRS462 Datasheet, PDF (1/23 Pages) Integrated Device Technology – Low Power Clock for ATI RS/RD600 series chipsets for AMD CPUs

DATASHEET
Low Power Clock for ATI RS/RD600 series chipsets for
AMD CPUs
ICS9LPRS462
Description
ATI RD/RS600 series systems using AMD CPUs
Output Features
• Integrated Series Resistors on differential outputs
• Greyhound Compatible CPU outputs
• 2 - 0.7V Low Power differential CPU pairs
• 8 - 0.7V Low Power differential SRC pairs
• 4 - 0.7V Low Power differential ATIG pairs
• 1 - 66 MHz HyperTransport clock
• 2 - 48MHz USB clocks
• 3 - 14.318MHz Reference clocks
Features/Benefits:
• 3 - Programmable Clock Request pins for SRC and ATIG
clocks
• ATIGCLKs are programmable for frequency
• Spread Spectrum for EMI reduction
• Outputs may be disabled via SMBus
• External crystal load capacitors for maximum frequency
accuracy
Key Specifications
• CPU outputs cycle-to-cycle jitter <150ps
• SRC outputs cycle-to-cycle jitter < 125ps
• ATIG outputs cycle-to-cycle jitter < 125ps
• +/- 100ppm frequency accuracy on all outputs if REF is
tuned to +/-100ppm
Pin Configuration
GNDREF 1
VDDREF 2
X1 3
X2 4
VDD48 5
48MHz_0 6
48MHz_1 7
GND48 8
SMBCLK 9
SMBDAT 10
RESET_IN# 11
SRC7T_LPR 12
SRC7C_LPR 13
VDDSRC 14
GNDSRC 15
SRC6T_LPR 16
SRC6C_LPR 17
SRC5T_LPR 18
SRC5C_LPR 19
SRC4T_LPR 20
SRC4C_LPR 21
GNDSRC 22
VDDSRC 23
SRC3T_LPR 24
SRC3C_LPR 25
SRC2T_LPR 26
SRC2C_LPR 27
VDDSRC 28
GNDSRC 29
ATIG3T_LPR 30
ATIG3C_LPR 31
*CLKREQB# 32
64 FS0/REF0
63 FS1/REF1
62 FS2/REF2
61 **PD
60 VDDHTT
59 HTTCLK0
58 GNDHTT
57 *CLKREQA#
56 CPUKG0T_LPR
55 CPUKG0C_LPR
54 VDDCPU
53 GNDCPU
52 CPUKG1T_LPR
51 CPUKG1C_LPR
50 VDDA
49 GNDA
48 NC
47 SRC0T_LPR
46 SRC0C_LPR
45 GNDSRC
44 VDDSRC
43 SRC1T_LPR
42 SRC1C_LPR
41 ATIG0T_LPR
40 ATIG0C_LPR
39 VDDATIG
38 GNDATIG
37 ATIG1T_LPR
36 ATIG1C_LPR
35 ATIG2T_LPR
34 ATIG2C_LPR
33 *CLKREQC#
64-TSSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
Funtionality
FS2 FS1 FS0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
CPU
MHz
Hi-Z
X/2
230.00
240.00
100.00
133.33
166.67
200.00
HTT
MHz
Hi-Z
X/3
76.67
80.00
66.66
66.66
66.66
66.66
SRC
M Hz
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
ATIG
M Hz
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
USB
M Hz
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
Power Groups
Pin Number
VDD
GND
5
8
Description
USB_48 outputs
14,23,26,36 15,22,27,37
33
32
SRCCLK outputs
ATIGCLK differential outputs
42
41
Analog, PLL
46
45
CPUCLK8 differential outputs
52
50
HTTCLK output
2
1
REF outputs
IDT^TM/ICS^TM Low Power Clock for ATI RS/RD600 series chipsets for AMD CPUs
1
1378A—04/07/08