ICS9LPRS464 Datasheet, PDF (1/23 Pages) Integrated Device Technology – System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs

DATASHEET
System Clock Chip for ATI RS/RD600 series chipsets using
AMD CPUs
ICS9LPRS464
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
• 6 - 0.7V Low Power differential SRC pairs
• 2 - 0.7V Low Power differential ATIG pairs
• 1 - 66 MHz HyperTransport clock
• 2 - 48MHz USB clocks
• 3 - 14.318MHz Reference clocks
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
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
Pin Configuration
GNDREF 1
56 FS0/REF0
VDDREF 2
55 FS1/REF1
X1 3
54 FS2/REF2
X2 4
VDD48 5
53 **PD
52 VDDHTT
48MHz_0 6
51 HTTCLK0
48MHz_1 7
50 GNDHTT
GND48 8
49 *CLKREQA#
SMBCLK 9
48 CPUKG0T_LPR
SMBDAT 10
47 CPUKG0C_LPR
RESET_IN# 11
46 VDDCPU
SRC5T_LPR 12
45 GNDCPU
SRC5C_LPR 13
44 CPUKG1T_LPR
VDDSRC 14
43 CPUKG1C_LPR
GNDSRC 15
42 VDDA
SRC4T_LPR 16
41 GNDA
SRC4C_LPR 17
40 NC
SRC3T_LPR 18
39 SRC0T_LPR
SRC3C_LPR 19
38 SRC0C_LPR
SRC2T_LPR 20
37 GNDSRC
SRC2C_LPR 21
36 VDDSRC
GNDSRC 22
35 ATIG0T_LPR
VDDSRC 23
34 ATIG0C_LPR
SRC1T_LPR 24
33 VDDATIG
SRC1C_LPR 25
32 GNDATIG
VDDSRC 26
31 ATIG1T_LPR
GNDSRC 27
30 ATIG1C_LPR
*CLKREQB# 28
29 *CLKREQC#
56-Pin SSOP/TSSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
Power Groups
Pin Number
VDD
5
GND
8
14,23,26,36 15,22,27,37
33
32
42
41
46
45
52
50
Description
USB_48 outputs
SRCCLK outputs
ATIGCLK differential outputs
Analog, PLL
CPUCLK8 differential outputs
HTTCLK output
2
1
REF outputs
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
IDT^TM/ICS^TM System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs
1
1377A—04/07/08