ICS952601YGLFT [ICSI]

Programmable Timing Control Hub⑩ for Next Gen P4⑩ processor; 可编程定时控制中心™的下一代P4 ™处理器
ICS952601YGLFT
型号: ICS952601YGLFT
厂家: INTEGRATED CIRCUIT SOLUTION INC    INTEGRATED CIRCUIT SOLUTION INC
描述:

Programmable Timing Control Hub⑩ for Next Gen P4⑩ processor
可编程定时控制中心™的下一代P4 ™处理器

文件: 总24页 (文件大小:181K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Programmable Timing Control Hub™ for Next Gen P4™ processor  
Recommended Application:  
Features/Benefits:  
CK409 clock, Intel Yellow Cover part  
Supports tight ppm accuracy clocks for Serial-ATA.  
Supports spread spectrum modulation, 0 to -0.5%  
down spread.  
Output Features:  
3 - 0.7V current-mode differential CPU pairs  
1 - 0.7V current-mode differential SRC pair  
7 - PCI (33MHz)  
Supports CPU clks up to 400MHz in test mode.  
Uses external 14.318MHz crystal, external crystal load  
caps are required for frequency tuning.  
3 - PCICLK_F, (33MHz) free-running  
1 - USB, 48MHz  
Supports undriven differential CPU, SRC pair in PD#  
and CPU_STOP# for power management.  
1 - DOT, 48MHz  
2 - REF, 14.318MHz  
4 - 3V66, 66.66MHz  
1 - VCH/3V66, selectable 48MHz or 66MHz  
Key Specifications:  
Pin Configuration  
REF0  
CPU/SRC outputs cycle-cycle jitter < 125ps  
3V66 outputs cycle-cycle jitter < 250ps  
PCI outputs cycle-cycle jitter < 250ps  
CPU outputs skew: < 100ps  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
56 FS_B  
55 VDDA  
54 GNDA  
53 GND  
52 IREF  
51 FS_A  
50 CPU_STOP#  
49 PCI_STOP#  
REF1  
VDDREF  
X1  
+/- 300ppm frequency accuracy on CPU & SRC clocks  
X2  
GND  
PCICLK_F0  
PCICLK_F1  
PCICLK_F2  
Functionality  
48  
VDDCPU  
CPU  
B6b5 FS_A FS_B MHz  
SRC  
MHz  
3V66 PCI  
MHz MHz  
REF USB/DOT  
47 CPUCLKT2  
46 CPUCLKC2  
VDDPCI  
GND  
MHz  
MHz  
48.00  
Ref/N5  
48.00  
48.00  
48.00  
Hi-Z  
0
0
0
1
1
1
0
0
1
1
0
100 100/200 66.66 33.33 14.318  
MID Ref/N0 Ref/N1 Ref/N2 Ref/N3 Ref/N4  
45  
PCICLK0  
PCICLK1  
PCICLK2  
PCICLK3  
VDDPCI  
GND  
PCICLK4  
PCICLK5  
PCICLK6  
GND  
1
0
1
200 100/200 66.66 33.33 14.318  
133 100/200 66.66 33.33 14.318  
166 100/200 66.66 33.33 14.318  
0
1
44 CPUCLKT1  
43 CPUCLKC1  
MID Hi-Z  
Hi-Z  
Hi-Z  
Hi-Z  
Hi-Z  
42  
VDDCPU  
0
1
0
1
200 100/200 66.66 33.33 14.318  
400 100/200 66.66 33.33 14.318  
266 100/200 66.66 33.33 14.318  
333 100/200 66.66 33.33 14.318  
48.00  
48.00  
48.00  
48.00  
41 CPUCLKT0  
40 CPUCLKC0  
39 GND  
38  
37  
SRCCLKT  
SRCCLKC  
PD# 21  
36 VDD  
22  
23  
24  
25  
26  
27  
28  
35 Vtt_PWRGD#  
3V66_0  
3V66_1  
VDD3V66  
GND  
3V66_2  
3V66_3  
SCLK  
34  
VDD48  
33 GND  
32  
31  
30  
29  
48MHz_DOT  
48MHz_USB  
SDATA  
3V66_4/VCH  
56-pin SSOP & TSSOP  
0701G—10/13/04  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Pin Description  
PIN #  
PIN NAME  
PIN TYPE  
DESCRIPTION  
1
2
3
4
5
6
7
8
REF0  
REF1  
VDDREF  
X1  
X2  
GND  
PCICLK_F0  
PCICLK_F1  
PCICLK_F2  
VDDPCI  
GND  
PCICLK0  
PCICLK1  
PCICLK2  
PCICLK3  
VDDPCI  
GND  
OUT  
OUT  
PWR  
IN  
14.318 MHz reference clock.  
14.318 MHz reference clock.  
Ref, XTAL power supply, nominal 3.3V  
Crystal input, Nominally 14.318MHz.  
Crystal output, Nominally 14.318MHz  
Ground pin.  
Free running PCI clock not affected by PCI_STOP# .  
Free running PCI clock not affected by PCI_STOP# .  
Free running PCI clock not affected by PCI_STOP# .  
Power supply for PCI clocks, nominal 3.3V  
Ground pin.  
PCI clock output.  
PCI clock output.  
PCI clock output.  
PCI clock output.  
Power supply for PCI clocks, nominal 3.3V  
Ground pin.  
PCI clock output.  
PCI clock output.  
PCI clock output.  
OUT  
PWR  
OUT  
OUT  
OUT  
PWR  
PWR  
OUT  
OUT  
OUT  
OUT  
PWR  
PWR  
OUT  
OUT  
OUT  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
PCICLK4  
PCICLK5  
PCICLK6  
Asynchronous active low input pin used to power down the device into a  
low power state. The internal clocks are disabled and the VCO and the  
crystal are stopped. The latency of the power down will not be greater  
than 1.8ms. Internal pull-up of 150K nominal.  
21  
PD#  
IN  
22  
23  
24  
25  
26  
27  
28  
3V66_0  
3V66_1  
VDD3V66  
GND  
3V66_2  
3V66_3  
SCLK  
OUT  
OUT  
PWR  
PWR  
OUT  
OUT  
IN  
3.3V 66.66MHz clock output  
3.3V 66.66MHz clock output  
Power pin for the 3V66 clocks.  
Ground pin.  
3.3V 66.66MHz clock output  
3.3V 66.66MHz clock output  
Clock pin of SMBus circuitry, 5V tolerant.  
0701G—10/13/04  
2
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Pin Description (Continued)  
PIN #  
PIN NAME  
PIN TYPE  
DESCRIPTION  
66.66MHz clock output for AGP support. AGP-PCI should be aligned  
with a skew window tolerance of 500ps.  
VCH is 48MHz clock output for video controller hub.  
Data pin for SMBus circuitry, 5V tolerant.  
48MHz clock output.  
48MHz clock output.  
Ground pin.  
Power pin for the 48MHz output.3.3V  
This 3.3V LVTTL input is a level sensitive strobe used to determine  
when latch inputs are valid and are ready to be sampled. This is an  
active low input.  
29  
3V66_4/VCH  
OUT  
30  
31  
32  
33  
34  
SDATA  
I/O  
48MHz_USB  
48MHz_DOT  
GND  
OUT  
OUT  
PWR  
PWR  
VDD48  
35  
Vtt_PWRGD#  
IN  
36  
37  
VDD  
PWR  
OUT  
Power supply for SRC clocks, nominal 3.3V  
Complement clock of differential pair for S-ATA support.  
+/- 300ppm accuracy required.  
SRCCLKC  
True clock of differential pair for S-ATA support.  
+/- 300ppm accuracy required.  
Ground pin.  
38  
39  
SRCCLKT  
GND  
OUT  
PWR  
Complimentary clock of differential pair CPU outputs. These are current  
mode outputs. External resistors are required for voltage bias.  
40  
CPUCLKC0  
OUT  
True clock of differential pair CPU outputs. These are current mode  
outputs. External resistors are required for voltage bias.  
Supply for CPU clocks, 3.3V nominal  
41  
42  
CPUCLKT0  
VDDCPU  
OUT  
PWR  
Complimentary clock of differential pair CPU outputs. These are current  
mode outputs. External resistors are required for voltage bias.  
43  
CPUCLKC1  
OUT  
True clock of differential pair CPU outputs. These are current mode  
outputs. External resistors are required for voltage bias.  
Ground pin.  
44  
45  
CPUCLKT1  
GND  
OUT  
PWR  
Complimentary clock of differential pair CPU outputs. These are current  
mode outputs. External resistors are required for voltage bias.  
46  
CPUCLKC2  
OUT  
True clock of differential pair CPU outputs. These are current mode  
outputs. External resistors are required for voltage bias.  
Supply for CPU clocks, 3.3V nominal  
47  
48  
CPUCLKT2  
VDDCPU  
OUT  
PWR  
Stops all PCICLKs and SRC pair besides the PCICLK_F clocks at logic  
0 level, when input low. PCI and SRC clocks can be set to  
Free_Running through I2C. Internal pull-up of 150K nominal.  
Stops all CPUCLK besides the free running clocks. Internal pull-up of  
150K nominal  
49  
PCI_STOP#  
IN  
50  
51  
CPU_STOP#  
FS_A  
IN  
IN  
Frequency select pin, see Frequency table for functionality  
This pin establishes the reference current for the differential current-  
mode output pairs. This pin requires a fixed precision resistor tied to  
ground in order to establish the appropriate current. 475 ohms is the  
standard value.  
52  
IREF  
OUT  
53  
54  
55  
56  
GND  
PWR  
PWR  
PWR  
IN  
Ground pin.  
Ground pin for core.  
3.3V power for the PLL core.  
Frequency select pin, see Frequency table for functionality  
GNDA  
VDDA  
FS_B  
0701G—10/13/04  
3
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
General Description  
ICS952601 follows Intel CK409 Yellow Cover specification. This clock synthesizer provides a single chip solution for next  
generation P4 Intel processors and Intel chipsets. ICS952601 is driven with a 14.318MHz crystal. It generates CPU outputs up  
to 200MHz. It also provides a tight ppm accuracy output for Serial ATA support.  
Block Diagram  
Frequency  
Dividers  
48MHz, USB, DOT, VCH  
PLL2  
X1  
X2  
XTAL  
REF (1:0)  
CPUCLKT (2:0)  
CPUCLKC (2:0)  
SRCCLKT0  
SRCCLKC0  
3V66(4:0)  
Programmable  
Spread  
Programmable  
Frequency  
Dividers  
STOP  
Logic  
SCLK  
SDATA  
PLL1  
CPU_STOP#  
PCI_STOP#  
Vtt_PWRGD#  
PD#  
PCICLK (6:0)  
PCICLKF (2:0)  
Control  
Logic  
FS_A  
I REF  
FS_B  
Power Groups  
Pin Number  
Description  
VDD  
3
GND  
6
Xtal, Ref  
24  
10,16  
36  
25  
11,17  
39  
3V66 [0:3]  
PCICLK outputs  
SRCCLK outputs  
55  
34  
N/A  
48, 42  
54  
33  
53  
45  
Master clock, CPU Analog  
48MHz, PLL, SCLK, SDATA  
IREF  
CPUCLK clocks  
0701G—10/13/04  
4
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Absolute Max  
Symbol  
Parameter  
Min  
Max  
Units  
V
DD + 0.5V  
VDD_A  
VDD_In  
Ts  
Tambient  
Tcase  
3.3V Core Supply Voltage  
3.3V Logic Input Supply Voltage  
Storage Temperature  
V
V
°C  
°C  
°C  
V
VDD + 0.5V  
GND - 0.5  
-65  
0
150  
70  
115  
Ambient Operating Temp  
Case Temperature  
Input ESD protection human body model  
ESD prot  
2000  
Electrical Characteristics - Input/Supply/Common Output Parameters  
TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%  
PARAMETER  
Input High Voltage  
Input MID Voltage  
Input Low Voltage  
Input High Current  
SYMBOL  
VIH  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS NOTES  
V
DD + 0.3  
3.3 V +/-5%  
3.3 V +/-5%  
2
1
V
V
VMID  
VIL  
1.8  
V
SS - 0.3  
3.3 V +/-5%  
VIN = VDD  
0.8  
V
IIH  
-5  
5
uA  
VIN = 0 V; Inputs with no pull-up  
resistors  
IIL1  
IIL2  
IDD3.3OP  
IDD3.3PD  
-5  
uA  
uA  
Input Low Current  
VIN = 0 V; Inputs with pull-up  
resistors  
-200  
Full Active, CL = Full load;  
Operating Supply Current  
Powerdown Current  
350  
mA  
258  
29  
0.3  
all diff pairs driven  
all differential pairs tri-stated  
VDD = 3.3 V  
35  
12  
mA  
mA  
MHz  
nH  
pF  
Input Frequency3  
Pin Inductance1  
Fi  
14.31818  
3
1
1
1
1
Lpin  
7
5
6
5
CIN  
Logic Inputs  
Output pin capacitance  
X1 & X2 pins  
Input Capacitance1  
COUT  
CINX  
pF  
pF  
From VDD Power-Up or de-  
Clk Stabilization1,2  
Modulation Frequency  
Tdrive_SRC  
TSTAB  
1.8  
33  
15  
ms  
kHz  
ns  
1,2  
1
assertion of PD# to 1st clock  
Triangular Modulation  
SRC output enable after  
PCI_Stop# de-assertion  
CPU output enable after  
PD# de-assertion  
30  
1
Tdrive_PD#  
300  
us  
1
Tfall_Pd#  
Trise_Pd#  
PD# fall time of  
PD# rise time of  
5
5
ns  
ns  
1
2
CPU output enable after  
CPU_Stop# de-assertion  
PD# fall time of  
Tdrive_CPU_Stop#  
10  
us  
1
Tfall_CPU_Stop#  
Trise_CPU_Stop#  
SMBus Voltage  
5
5
5.5  
0.4  
ns  
ns  
V
1
2
1
1
1
PD# rise time of  
VDD  
VOL  
2.7  
4
@ IPULLUP  
Low-level Output Voltage  
Current sinking at VOL = 0.4 V  
SCLK/SDATA  
V
IPULLUP  
mA  
TRI2C  
(Max VIL - 0.15) to (Min VIH + 0.15)  
(Min VIH + 0.15) to (Max VIL - 0.15)  
1000  
300  
ns  
ns  
1
1
Clock/Data Rise Time3  
SCLK/SDATA  
Clock/Data Fall Time3  
TFI2C  
1Guaranteed by design, not 100% tested in production.  
2See timing diagrams for timing requirements.  
3 Input frequency should be measured at the REF output pin and tuned to ideal 14.31818MHz to meet  
ppm frequency accuracy on PLL outputs.  
0701G—10/13/04  
5
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Electrical Characteristics - CPU & SRC 0.7V Current Mode Differential Pair  
TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL =2pF  
PARAMETER  
Current Source Output  
Impedance  
SYMBOL  
Zo1  
CONDITIONS  
VO = Vx  
MIN  
TYP  
MAX  
850  
UNITS NOTES  
1
3000  
Statistical measurement on single  
ended signal using oscilloscope  
math function.  
Voltage High  
Voltage Low  
VHigh  
VLow  
660  
770  
5
1
mV  
-150  
150  
1
Measurement on single ended  
signal using absolute value.  
Max Voltage  
Min Voltage  
Crossing Voltage (abs)  
Vovs  
Vuds  
Vcross(abs)  
756  
-7  
350  
1150  
1
mV  
1
mV  
-300  
250  
550  
140  
300  
1
Variation of crossing over all  
edges  
see Tperiod min-max values  
200MHz nominal  
Crossing Voltage (var)  
Long Accuracy  
d-Vcross  
ppm  
12  
mV  
1
-300  
ppm  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ps  
1,2  
2
2
2
2
2
2
2
2
1,2  
1,2  
1,2  
1,2  
1
4.9985 5.0000 5.0015  
4.9985 5.0266  
5.9982 6.0000 6.0018  
5.9982 6.0320  
7.4978 7.5000 7.5023  
7.4978 5.4000  
9.9970 10.0000 10.0030  
200MHz spread  
166.66MHz nominal  
166.66MHz spread  
133.33MHz nominal  
133.33MHz spread  
100.00MHz nominal  
100.00MHz spread  
Average period  
Tperiod  
9.9970  
4.8735  
5.8732  
7.3728  
9.8720  
175  
10.0533  
200MHz nominal  
166.66MHz nominal/spread  
133.33MHz nominal/spread  
100.00MHz nominal/spread  
VOL = 0.175V, VOH = 0.525V  
Tabsmin  
Absolute min period  
tr  
Rise Time  
Fall Time  
332  
344  
30  
700  
700  
125  
125  
tf  
VOH = 0.525V VOL = 0.175V  
175  
ps  
ps  
ps  
1
1
1
d-tr  
d-tf  
Rise Time Variation  
Fall Time Variation  
30  
Measurement from differential  
wavefrom  
VT = 50%  
Measurement from differential  
wavefrom  
dt3  
tsk3  
Duty Cycle  
Skew  
45  
49  
8
55  
%
ps  
ps  
1
1
1
100  
125  
tjcyc-cyc  
Jitter, Cycle to cycle  
37  
1Guaranteed by design, not 100% tested in production.  
2 All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that Ref output is at  
14.31818MHz  
SRC clock outputs run at only 100MHz or 200MHz, specs for 133.33 and 166.66 do not apply to SRC clock pair.  
0701G—10/13/04  
6
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Electrical Characteristics - 3V66 Mode: 3V66 [4:0]  
TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL = 10-30 pF (unless otherwise specified)  
PARAMETER  
Long Accuracy  
SYMBOL  
ppm  
CONDITIONS  
see Tperiod min-max values  
66.66MHz output nominal  
66.66MHz output spread  
IOH = -1 mA  
MIN  
-300  
14.9955  
14.9955  
2.4  
TYP  
15  
MAX  
300  
15.0045  
15.0799  
UNITS Notes  
ppm  
ns  
1,2  
2
Tperiod  
Clock period  
ns  
2
VOH  
VOL  
Output High Voltage  
Output Low Voltage  
V
IOL = 1 mA  
0.55  
-33  
V
V OH @ MIN = 1.0 V  
VOH @ MAX = 3.135 V  
-33  
30  
mA  
mA  
mA  
mA  
V/ns  
V/ns  
ns  
IOH  
IOL  
Output High Current  
Output Low Current  
VOL @ MIN = 1.95 V  
V
OL @ MAX = 0.4 V  
Rising edge rate  
Falling edge rate  
38  
4
4
Edge Rate  
Edge Rate  
Rise Time  
Fall Time  
1
1
0.5  
0.5  
1
1
1
1
tr1  
tf1  
VOL = 0.4 V, VOH = 2.4 V  
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
1.92  
1.97  
53.1  
38  
2
2
ns  
dt1  
Duty Cycle  
Skew  
45  
55  
%
ps  
ps  
1
1
1
tsk1  
VT = 1.5 V  
250  
250  
tjcyc-cyc  
VT = 1.5 V 3V66  
Jitter  
139  
1Guaranteed by design, not 100% tested in production.  
2 All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that Ref output is at  
14.31818MHz  
Electrical Characteristics - PCICLK/PCICLK_F  
TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL = 10-30 pF (unless otherwise specified)  
PARAMETER  
Long Accuracy  
SYMBOL  
ppm  
CONDITIONS  
see Tperiod min-max values  
33.33MHz output nominal  
33.33MHz output spread  
IOH = -1 mA  
MIN  
-300  
TYP MAX  
300  
UNITS Notes  
ppm  
ns  
1,2  
2
29.9910 30 30.0090  
29.9910  
2.4  
Tperiod  
Clock period  
30.1598  
0.55  
-33  
ns  
2
VOH  
VOL  
Output High Voltage  
Output Low Voltage  
V
IOL = 1 mA  
V
V
OH @MIN = 1.0 V  
VOH@ MAX = 3.135 V  
OL @ MIN = 1.95 V  
-33  
30  
mA  
mA  
mA  
mA  
IOH  
IOL  
Output High Current  
Output Low Current  
V
V
OL @ MAX = 0.4 V  
Rising edge rate  
Falling edge rate  
38  
Edge Rate  
Edge Rate  
Rise Time  
Fall Time  
Duty Cycle  
Skew  
1
4
4
V/ns  
V/ns  
ns  
1
1
1
1
1
1
1
1
tr1  
tf1  
VOL = 0.4 V, VOH = 2.4 V  
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
0.5  
0.5  
45  
1.92  
1.9  
51.4  
18  
2
2
ns  
dt1  
55  
500  
250  
%
tsk1  
VT = 1.5 V  
ps  
tjcyc-cyc  
VT = 1.5 V 3V66  
Jitter  
92  
ps  
1Guaranteed by design, not 100% tested in production.  
2 All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that Ref output is  
at 14.31818MHz  
0701G—10/13/04  
7
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Electrical Characteristics - 48MHz DOT Clock  
TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL = 5-10 pF (unless otherwise specified)  
PARAMETER  
Long Accuracy  
SYMBOL  
ppm  
CONDITIONS  
see Tperiod min-max  
values  
MIN  
-200  
TYP  
MAX  
200  
UNITS Notes  
ppm  
1,2  
2
Tperiod  
VOH  
Clock period  
Output High Voltage  
Output Low Voltage  
66.66MHz output nominal 20.8257  
20.8340  
ns  
V
IOH = -1 mA  
2.4  
-33  
30  
VOL  
IOL = 1 mA  
0.55  
-33  
V
V
OH @ MIN = 1.0 V  
mA  
mA  
mA  
mA  
V/ns  
V/ns  
IOH  
IOL  
Output High Current  
Output Low Current  
VOH @ MAX = 3.135 V  
OL @ MIN = 1.95 V  
V
VOL @ MAX = 0.4 V  
Rising edge rate  
Falling edge rate  
38  
4
Edge Rate  
Edge Rate  
2
2
1
1
4
tr1  
VOL = 0.4 V, VOH = 2.4 V  
VOH = 2.4 V, VOL = 0.4 V  
Rise Time  
0.5  
0.71  
1
ns  
1
tf1  
Fall Time  
0.5  
45  
0.77  
49  
1
ns  
%
1
1
dt1  
VT = 1.5 V  
Duty Cycle  
55  
125us period jitter  
(8kHz frequency  
Long Term Jitter  
0.7  
2
ns  
1
modulation amplitude)  
1Guaranteed by design, not 100% tested in production.  
2 All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that Ref  
output is at 14.31818MHz  
Electrical Characteristics - VCH, 48MHz, USB  
TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL = 10-20 pF (unless otherwise specified)  
PARAMETER  
Long Accuracy  
Clock period  
SYMBOL  
ppm  
Tperiod  
CONDITIONS  
see Tperiod min-max values  
66.66MHz output nominal  
IOH = -1 mA  
MIN TYP MAX UNITS Notes  
-200  
20.8257  
2.4  
200  
20.8340 ns  
V
ppm  
1,2  
2
VOH  
Output High Voltage  
VOL  
IOH  
IOL = 1 mA  
Output Low Voltage  
0.55  
V
V OH @ MIN = 1.0 V  
VOH@ MAX = 3.135 V  
VOL @MIN = 1.95 V  
VOL @ MAX = 0.4 V  
Rising edge rate  
-33  
30  
mA  
mA  
mA  
mA  
V/ns  
V/ns  
Output High Current  
-33  
IOL  
Output Low Current  
38  
2
Edge Rate  
Edge Rate  
1
1
1
1
Falling edge rate  
2
tr1  
tf1  
VOL = 0.4 V, VOH = 2.4 V  
Rise Time  
Fall Time  
1
1
1.43  
1.33  
48  
2
2
ns  
ns  
%
1
1
1
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
dt1  
Duty Cycle  
45  
55  
125us period jitter  
(8kHz frequency modulation  
amplitude)  
Long Term Jitter  
0.7  
6
ns  
1
1Guaranteed by design, not 100% tested in production.  
2 All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that Ref output is  
at 14.31818MHz  
0701G—10/13/04  
8
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Electrical Characteristics - REF-14.318MHz  
TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL = 10-20 pF (unless otherwise specified)  
PARAMETER  
Long Accuracy  
SYMBOL  
CONDITIONS  
see Tperiod min-max values  
14.318MHz output nominal  
IOH = -1 mA  
MIN  
-300  
TYP MAX  
UNITS  
ppm  
ns  
ppm1  
Tperiod  
300  
Clock period  
69.8270  
2.4  
69.8550  
1
Output High Voltage  
Output Low Voltage  
V
VOH  
1
IOL = 1 mA  
0.4  
-23  
V
VOL  
V OH @MIN = 1.0 V,  
OH@MAX = 3.135 V  
V
1
Output High Current  
Output Low Current  
-29  
29  
mA  
mA  
IOH  
VOL @MIN = 1.95 V,  
@MAX = 0.4 V  
VOL  
1
27  
IOL  
1
VOL = 0.4 V, VOH = 2.4 V  
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
Rise Time  
Fall Time  
Skew  
1
1
1.92  
1.92  
26  
2
2
ns  
ns  
ps  
%
tr1  
1
tf1  
1
500  
55  
tsk1  
1
VT = 1.5 V  
Duty Cycle  
45  
53.4  
284  
dt1  
1
VT = 1.5 V  
Jitter  
1000  
ps  
tjcyc-cyc  
1Guaranteed by design, not 100% tested in production.  
Group to Group Skews at Common Transition Edges  
GROUP  
200MHZ CPU to  
3V661  
SYMBOL  
CONDITIONS  
MIN TYP MAX UNITS  
3V66 (4:0) leads 200MHZ  
CPU  
SCPU200-3V66  
-2.1  
-1.6 -1.1  
ns  
3V66 to PCI  
DOT-USB  
S3V66-PCI  
SDOT_USB  
SDOT_VCH  
3V66 (4:0) leads 33MHz PCI 1.50  
3.50  
1.00  
1.00  
ns  
ns  
ns  
2.59  
180 degrees out of phase  
in phase  
0.00  
0.00  
DOT-VCH  
1. 3V66 MHz CL = 0pf, Rseries = 33 ohm. CPU CL = 2 pf, Rseries = 33 ohm, Rshunt = 49.9 ohms.  
Measured at the pins of the 952601.  
0701G—10/13/04  
9
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
General I2C serial interface information for the ICS952601  
How to Write:  
How to Read:  
Controller (host) sends a start bit.  
• Controller (host) sends the write address D2(H)  
• ICS clock will acknowledge  
• Controller (host) will send start bit.  
• Controller (host) sends the write address D2(H)  
• ICS clock will acknowledge  
• Controller (host) sends the begining byte location = N  
• ICS clock will acknowledge  
• Controller (host) sends the begining byte  
location = N  
• Controller (host) sends the data byte count = X  
• ICS clock will acknowledge  
• Controller (host) starts sending Byte N through  
Byte N + X -1  
• ICS clock will acknowledge  
• Controller (host) will send a separate start bit.  
• Controller (host) sends the read address D3(H)  
• ICS clock will acknowledge  
(see Note 2)  
• ICS clock will send the data byte count = X  
• ICS clock sends Byte N + X -1  
• ICS clock will acknowledge each byte one at a time  
• ICS clock sends Byte 0 through byte X (if X(H)  
was written to byte 8).  
• Controller (host) sends a Stop bit  
• Controller (host) will need to acknowledge each byte  
• Controllor (host) will send a not acknowledge bit  
• Controller (host) will send a stop bit  
Index Block Read Operation  
Index Block Write Operation  
Controller (Host)  
ICS (Slave/Receiver)  
Controller (Host)  
ICS (Slave/Receiver)  
T
starT bit  
starT bit  
T
Slave Address D2(H)  
Slave Address D2(H)  
WR  
WRite  
WR  
WRite  
ACK  
ACK  
ACK  
ACK  
ACK  
ACK  
Beginning Byte = N  
Beginning Byte = N  
Data Byte Count = X  
Beginning Byte N  
RT  
Repeat starT  
Slave Address D3(H)  
RD  
ReaD  
ACK  
Data Byte Count = X  
Beginning Byte N  
ACK  
ACK  
Byte N + X - 1  
ACK  
P
stoP bit  
Byte N + X - 1  
N
P
Not acknowledge  
stoP bit  
0701G—10/13/04  
10  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
I2C Table: Read-Back Register  
Byte 0  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Pin #  
Name  
Control Function  
RESERVED  
Type  
0
1
PWD  
-
-
-
-
RESERVED  
RESERVED  
RESERVED  
RESERVED  
RESERVED  
PCI_STOP#  
-
-
-
-
X
X
X
X
RESERVED  
RESERVED  
RESERVED  
RESERVED  
RESERVED  
RESERVED  
PCI STOP# Read  
-
-
-
-
READBACK  
READBACK  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
R
R
R
R
X
X
X
Back  
CPU STOP Read  
Back  
CPU_STOP#  
FSB  
Freq Select 1 Read  
READBACK of CPU(2:0)  
Frequency  
Back  
Freq Select 0 Read  
Back  
FSA  
X
I2C Table: Spreading and Device Behavior Control Register  
Byte 1  
Pin #  
Name  
Control Function  
SRC Free-Running  
Control  
Type  
0
1
PWD  
37,38  
Bit 7  
SRC/SRC#  
RW  
FREE-RUN STOPPABLE  
0
37,38  
46,47  
43,44  
40,41  
46,47  
43,44  
40,41  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
SRC  
Output Control  
CPU FREE-  
RUNNING  
CONTROL  
Output Control  
Output Control  
Output Enable  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
Disable Enable  
1
1
1
1
1
1
1
CPUT2/CPUC2  
CPUT1/CPUC1  
CPUT0/CPUC0  
CPUT2/CPUC2  
CPUT1/CPUC1  
CPUT0/CPUC0  
FREE-RUN STOPPABLE  
FREE-RUN STOPPABLE  
FREE-RUN STOPPABLE  
Disable  
Disable  
Disable  
Enable  
Enable  
Enable  
I2C Table: Output Control Register  
Byte 2  
Pin #  
37,38  
Name  
Control Function  
Type  
0
1
PWD  
SRC_PD#  
Drive Mode  
SRC_Stop#  
Drive Mode  
Bit 7  
0: Driven in PD#  
RW  
Driven  
Hi-Z  
0
0: Driven in  
PCI_Stop#  
37,38  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
Driven  
Driven  
Driven  
Driven  
Driven  
Driven  
Driven  
Hi-Z  
Hi-Z  
Hi-Z  
Hi-Z  
Hi-Z  
Hi-Z  
Hi-Z  
0
0
0
0
0
0
0
CPUT2_PD# Drive Mode  
CPUT1_PD# Drive Mode  
CPUT0_PD# Drive Mode  
CPUT2_Stop Drive Mode  
CPUT1_Stop Drive Mode  
CPUT0_Stop Drive Mode  
46,47  
43,44  
0:driven in PD#  
1: Tri-stated  
40,41  
46,47  
43,44  
0:driven when  
stopped  
1: Tri-stated  
40,41  
0701G—10/13/04  
11  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
I2C Table: Output Control Register  
Byte 3  
Pin #  
Name  
Control Function  
PCI_Stop# Control  
0:all stoppable PCI  
and SRC are  
Type  
0
1
PWD  
7,8,9,12,13,14,15,  
18,19,20,37,38,  
Bit 7  
PCI_Stop#  
RW  
Enable  
Disable  
1
stopped  
20  
19  
18  
15  
14  
13  
12  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
PCICLK6  
PCICLK5  
PCICLK4  
PCICLK3  
PCICLK2  
PCICLK1  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
RW  
RW  
RW  
RW  
RW  
RW  
Disable  
Disable  
Disable  
Disable  
Disable  
Disable  
Enable  
Enable  
Enable  
Enable  
Enable  
Enable  
1
1
1
1
1
1
PCICLK0  
Output Control  
RW  
Disable  
Enable  
1
I2C Table: Output Control Register  
Byte 4  
Pin #  
Name  
Control Function  
0=2x drive  
Type  
0
1
PWD  
48MHz_USB  
2x output drive  
48MHz_USB  
PCIF2  
31  
Bit 7  
RW  
2x drive  
Disable  
FREE-RUN STOPPABLE  
FREE-RUN STOPPABLE  
FREE-RUN STOPPABLE  
Disable  
Disable  
Disable  
normal  
Enable  
0
31  
9
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Output Control  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
1
0
0
0
1
1
1
PCI FREE-RUN  
NING CONTROL  
8
7
9
8
PCIF1  
PCIF0  
PCICLK_F2  
PCICLK_F1  
PCICLK_F0  
Output Control  
Output Control  
Output Control  
Enable  
Enable  
Enable  
7
I2C Table: Output Control Register  
Byte 5  
Bit 7  
Pin #  
Name  
48MHZ_DOT  
RESERVED  
3V66_4/VCH  
Select  
Control Function  
Output Control  
RESERVED  
Type  
RW  
`
0
1
Enable  
-
PWD  
1
0
32  
-
Disable  
-
Bit 6  
29  
Bit 5  
Output Select  
RW  
3V66  
VCH  
0
29  
27  
26  
23  
22  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
3V66_4/VCH  
3V66_3  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
RW  
RW  
RW  
RW  
RW  
Disable  
Disable  
Disable  
Disable  
Disable  
Enable  
Enable  
Enable  
Enable  
Enable  
1
1
1
1
1
3V66_2  
3V66_1  
3V66_0  
0701G—10/13/04  
12  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
I2C Table: Output Control and Fix Frequency Register  
Byte 6  
Pin #  
Name  
Control Function  
Type  
0
1
PWD  
1,2,7,8,9,12,13,14,1  
5,18,19,20,22,23,26,  
27,29,31,32,37,38,4  
0,41,43,44,46,47  
Bit 7  
Test Clock Mode  
Test Clock Mode  
-
Disable  
Enable  
0
-
Bit 6  
Bit 5  
RESERVED  
RESERVED  
-
-
-
-
-
0
0
FS_A and FS_B  
Operation  
SRC Frequency  
Select  
40,41,43,44,46,47  
Normal  
Test Mode  
37,38  
Bit 4  
Bit 3  
RESERVED  
RESERVED  
-
-
100MHz  
-
200MHz  
-
0
0
-
7,8,9,12,13,14,15,18  
,19,20,22,23,26,27,2  
9,31,32,37,38,40,41,  
43,44,46,47  
Spread  
ON  
Bit 2  
Spread Spectrum Mode  
Spread OFF  
0
2
1
Bit 1  
Bit 0  
REF1  
REF0  
Output Control  
Output Control  
RW  
RW  
Disable  
Disable  
Enable  
Enable  
1
1
I2C Table: Vendor & Revision ID Register  
Byte 7  
Bit 7  
Pin #  
Name  
RID3  
RID2  
RID1  
RID0  
VID3  
VID2  
VID1  
VID0  
Control Function  
Type  
R
R
R
R
R
R
R
R
0
-
-
-
-
-
-
-
-
1
-
-
-
-
-
-
-
-
PWD  
-
-
-
-
-
-
-
-
X
X
X
X
0
0
0
1
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
REVISION ID  
VENDOR ID  
0701G—10/13/04  
13  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
PCI Stop Functionality  
The PCI_STOP# signal is on an active low input controlling PCI and SRC outputs. If PCIF (2:0) and SRC clocks can be set to  
be free-running through I2C programming. Outputs set to be free-running will ignore both the PCI_STOP pin and the  
PCI_STOP register bit.  
PCI_STOP#  
CPU  
CPU #  
SRC  
SRC#  
3V66  
PCIF/PCI USB/DOT  
REF  
Note  
1
0
Normal Normal Normal Normal 66MHz  
33MHz  
Low  
48MHz  
48MHz  
14.318MHz  
14.318MHz  
Normal Normal Iref * 6  
or Float  
Low  
66MHz  
PCI_STOP# Assertion (transition from '1' to '0')  
The clock samples the PCI_STOP# signal on a rising edge of PCIF clock. After detecting the PCI_STOP# assertion low, all  
PCI[6:0] and stoppable PCIF[2:0] clocks will latch low on their next high to low transition. After the PCI clocks are latched low,  
the SRC clock, (if set to stoppable) will latch high at Iref * 6 (or tristate if Byte 2 Bit 6 = 1) upon its next low to high transition and  
the SRC# will latch low as shown below.  
Tsu  
PCI_STOP#  
PCIF[2:0] 33MHz  
PCI[6:0] 33MHz  
SRC 100MHz  
SRC# 100MHz  
PCI_STOP# - De-assertion  
The de-assertion of the PCI_Stop# signal is to be sampled on the rising edge of the PCIF free running clock domain. After  
detecting PCI_Stop# de-assertion, all PCI[6:0], stoppable PCIF[2:0] and stoppable SRC clocks will resume in a glitch free  
manner.  
Tsu  
Tdrive_SRC  
PCI_STOP#  
PCIF[2:0] 33MHz  
PCI[6:0] 33MHz  
SRC 100MHz  
SRC# 100MHz  
0701G—10/13/04  
14  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
CPU_STOP# Functionality  
The CPU_STOP# signal is an active low input controlling the CPU outputs. This signal can be asserted asynchronously.  
CPU_STOP#  
CPU  
CPU #  
SRC  
SRC#  
3V66  
PCIF/PCI USB/DOT  
REF  
Note  
1
0
Normal  
Normal Normal Normal 66MHz  
33MHz  
33MHz  
48MHz  
48MHz  
14.318MHz  
14.318MHz  
Iref * 6 or  
Float  
Low  
Normal Normal 66MHz  
CPU_STOP# - Assertion (transition from '1' to '0')  
Asserting CPU_STOP# pin stops all CPU outputs that are set to be stoppable after their next transition. When the I2C  
CPU_STOP tri-state bit corresponding to the CPU output of interest is programmed to a '0', CPU output will stop CPU_True  
= HIGH and CPU_Complement = LOW. When the I2C CPU_Stop tri-state bit corresponding to the CPU output of interest is  
programmed to a '1', CPU outputs will be tri-stated.  
CPU_STOP#  
CPU  
CPU#  
CPU_STOP# - De-assertion (transition from '0' to '1')  
With the de-assertion of CPU_Stop# all stopped CPU outputs will resume without a glitch. The maximum latency from the  
de-assertion to active outputs is 2 - 6 CPU clock periods. If the control register tristate bit corresponding to the output of  
interest is programmed to '1', then the stopped CPU outputs will be driven High within 10nS of CPU_Stop# de-assertion to  
a voltage greater than 200mV.  
CPU_Stop#  
CPU  
CPU#  
CPU Internal  
Tdrive_CPU_Stop, 10nS >200mV  
0701G—10/13/04  
15  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
PD#, Power Down  
PD# is an asynchronous active low input used to shut off all clocks cleanly prior to clock power.  
When PD# is asserted low all clocks will be driven low before turning off the VCO. In PD# de-assertion all clocks will start  
without glitches.  
PWRDWN#  
CPU  
CPU #  
SRC  
SRC#  
3V66  
PCIF/PCI USB/DOT  
REF  
14.318MHz  
Low  
Note  
1
0
Normal  
Normal Normal Normal 66MHz  
33MHz  
Low  
48MHz  
Low  
Iref * 2 or  
Float  
Float  
Iref * 2  
or Float  
Float  
Low  
Notes:  
1. Refer to tristate control of CPU and SRC clocks in section 7.7 for tristate timing and operation.  
2. Refer to Control Registers in section 16 for CPU_Stop, SRC_Stop and PwrDwn SMBus tristate control addresses.  
PD# Assertion  
PD# should be sampled low by 2 consecutive CPU# rising edges before stopping clocks. All single ended clocks will be  
held low on their next high to low transition.  
All differential clocks will be held high on the next high to low transition of the complimentary clock. If the control register  
determining to drive mode is set to 'tri-state', the differential pair will be stopped in tri-state mode, undriven.  
When the drive mode but corresponding to the CPU or SRC clock of interest is set to '0' the true clock will be driven high at  
2 x Iref and the complementary clock will be tristated. If the control register is programmed to '1' both clocks will be tristated.  
PWRDWN#  
CPU, 133MHz  
CPU#, 133MHz  
SRC, 100MHz  
SRC#, 100MHz  
3V66, 66MHz  
USB, 48MHz  
PCI, 33MHz  
REF, 14.31818  
0701G—10/13/04  
16  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
PD# De-assertion  
The time from the de-assertion of PD# or until power supply ramps to get stable clocks will be less than 1.8ms. If the drive  
mode control bit for PD# tristate is programmed to '1' the stopped differential pair must first be driven high to a minimum of  
200mV in less than 300µs of PD# deassertion.  
Tstable  
<1.8mS  
PWRDWN#  
CPU, 133MHz  
CPU#, 133MHz  
SRC, 100MHz  
SRC# 100MHz  
3V66, 66MHz  
USB, 48MHz  
PCI, 33MHz  
REF, 14.31818  
Tdrive_PwrDwn#  
<300µS, >200mV  
3V66_4/VCH Pin Functionality  
The 3V66_4/VCH pin can be configured to be a 66.66MHz modulated output or a non-spread 48MHz output. The default is  
3V66 clock. The switching is controlled by Byte 5 Bit 5. If it is set to '1' this pin will output the 48MHz VCH clock. The output  
will go low on the falling edge of 3V66 for a minimum of 7.49ns. Then the output will transition to 48MHz on the next rising  
edge of DOT_48 clock.  
3V66  
3V66_4/VCH  
DOT_48  
7.49nS min  
0701G—10/13/04  
17  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
Differential Clock Tristate  
To minimize power consumption, CPU[2:0] clock outputs are individually configurable through SMBus to be driven or  
tristated during PwrDwn# and CPU_Stop# mode and the SRC clock is configurable to be driven or tristated during  
PCI_Stop# and PwrDwn# mode. Each differential clock (SRC, CPU[2:0]) output can be disabled by setting the  
corresponding output's register OE bit to "0" (disable). Disabled outputs are to be tristated regardless of "CPU_Stop",  
"SRC_Stop" and "PwrDwn" register bit settings.  
Signal  
Pin PD#  
Pin  
CPU_Stop  
Pwrdwn  
Non-Stoppable  
Outputs  
Stoppable  
Outputs  
CPU_Stop# Tristate Bit Tristate Bit  
CPU[2:0}  
CPU[2:0}  
CPU[2:0}  
CPU[2:0}  
CPU[2:0}  
1
1
1
0
0
1
0
X
X
X
X
0
Running  
Running  
Running  
Running  
Driven @ Iref x 6  
Tristate  
0
1
0
X
X
X
X
Driven @ Iref x 2 Driven @ Iref x 2  
Tristate Tristate  
1
Notes:  
1. Each output has four corresponding control register bits, OE, PwrDwn, CPU_Stop and "Free Running"  
2. Iref x 6 and Iref x 2 is the output current in the corresponding mode  
3. See Control Registers section for bit address  
Signal  
Pin PD#  
Pin  
PCI_Stop#  
PCI_Stop  
Tristate Bit Tristate Bit  
Pwrdwn  
Non-Stoppable  
Output  
Stoppable  
Output  
SRC  
SRC  
SRC  
SRC  
SRC  
1
1
1
0
0
1
0
X
X
X
X
0
Running  
Running  
Running  
Running  
Driven @ Iref x 6  
Tristate  
0
1
0
X
X
X
X
Driven @ Iref x 2 Driven @ Iref x 2  
Tristate Tristate  
1
Notes:  
1. SRC output has four corresponding control register bits, OE, PwrDwn, SRC_Stop and "Free Running"  
2. Iref x 6 and Iref x 2 is the output current in the corresponding mode  
3. See Control Registers section for bit address  
0701G—10/13/04  
18  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
CPU Clock Tristate Timing  
The following diagrams illustrate CPU clock timing during CPU_Stop# and PwrDwn# modes with CPU_PwrDwn and  
CPU_Stop tristate control bits set to driven or tristate in byte 2 of the control register.  
CPU_Stop = Driven, CPU_Pwrdwn = Driven  
1.8mS  
CPU_Stop#  
PD#  
CPU (Free Running)  
CPU# (Free Running)  
CPU (Stoppable)  
CPU# (Stoppable)  
Notes:  
1. When both bits (CPU_Stop & CPU_Pwrdown tristate bits) are low, the clock chip will never tristate CPU output clocks  
(assuming clock's OE bit is set to "1")  
CPU_Stop = Tristate, CPU_Pwrdwn = Driven  
1.8mS  
CPU_Stop#  
PD#  
CPU (Free Running)  
CPU# (Free Running)  
CPU (Stoppable)  
CPU# (Stoppable)  
Notes:  
1. Tristate outputs are pulled low by output termination resistors as shown here.  
0701G—10/13/04  
19  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
CPU_Stop = Driven, CPU_Pwrdwn = Tristate  
1.8mS  
CPU_Stop#  
PWRDWN#  
CPU (Free Running)  
CPU# (Free Running)  
CPU (Stoppable)  
CPU# (Stoppable)  
Notes:  
1. When CPU_Pwrdwn is set to tristate and CPU_Stop is set to driven, the clock chip will tristate outputs only during the  
assertion of PWRDWN#. Differential clock behavior during the assertion/de-assertion of CPU_Stop# will be unaffected.  
2. In the case that CPU_Stop# is de-asserted during the 1.8mS PWRDWN# de-assertion resume delay, the clock chip can  
sample the CPU_Stop# high with the internal rising edges of clock#. This will result in CPU clocks resuming immediately  
after the 1.8mS windows expires. This applies to all control register bit changes as well.  
3. Tristate outputs are pulled low by output termination resistors as shown here.  
CPU_Stop = Tristate, CPU_Pwrdwn = Tristate  
1.8mS  
CPU_Stop#  
PWRDWN#  
CPU (Free Running)  
CPU# (Free Running)  
CPU (Stoppable)  
CPU# (Stoppable)  
Notes:  
1. When CPU_Stop and CPU_Pwrdwn bits are set to tristate, the clock chip will tristate the outputs during the assertion of  
CPU_Stop# and PWRDWN#.  
2. Tristate outputs are pulled low by output termination resistors as shown here.  
0701G—10/13/04  
20  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
SRC Clock Tristate Timing  
The following diagrams illustrate SRC clock timing during PCI_Stop# and PwrDwn# modes with SRC_Pwrdwn and  
SRC_Stop tristate control bits set to driven or tristate in byte 2 of the control register.  
SRC_Stop = Driven, SRC_Pwrdwn = Driven  
1.8mS  
PCI_Stop#  
PCI (Free Running)  
PWRDWN#  
CPU (Free Running)  
CPU# (Free Running)  
SRC (Stoppable)  
SRC# (Stoppable)  
1 PCI  
clock max  
Notes:  
1. When both bits (SRC_Stop & SRC_Pwrdown tristate bits) are set to driven, the clock chip will never tristate the SRC output  
clock (assuming clock's OE bit is set to "1")  
SRC_Stop = Tristate, Pwrdwn = Tristate  
1.8mS  
PCI_Stop#  
PCI (Free Running)  
PWRDWN#  
CPU (Free Running)  
CPU# (Free Running)  
SRC (Stoppable)  
SRC# (Stoppable)  
1 PCI  
clock max  
Notes:  
1. When SRC_Stop and SRC_Pwrdwn bits are set to tristate, the clock chip will tristate outputs during the assertion of  
PCI_Stop# and PWRDWN#.  
2. Tristate outputs are pulled low by output termination resistors as shown here.  
0701G—10/13/04  
21  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
PCI_STOP Asserted  
SRC_Stop = Tristate, SRC_Pwrdwn = Tristate  
1.8mS  
PCI_Stop#  
PCI (Free Running)  
PWRDWN#  
CPU (Free Running)  
CPU# (Free Running)  
SRC (Stoppable)  
SRC# (Stoppable)  
Notes:  
1. When SRC_Pwrdwn and SRC_Stop are set to tristate, the clock chip will tristate outputs during the assertion of PCI_Stop#  
and PWRDWN#.  
2. In the case that PCI_Stop# is de-asserted during the 1.8mS PWRDWN# de-assertion resume delay, the clock chip can  
sample the PCI_Stop# high with the internal rising edges of CPU clock#. This will result in SRC clocks resuming  
immediately after the 1.8mS window expires. This applies to all control register bit changes as well.  
3. Tristate outputs are pulled low by output termination resistors as shown here.  
0701G—10/13/04  
22  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
c
56-Lead, 300 mil Body, 25 mil, SSOP  
N
In Millimeters  
In Inches  
SYMBOL  
COMMON DIMENSIONS  
COMMON DIMENSIONS  
L
MIN  
2.41  
0.20  
0.20  
0.13  
MAX  
2.80  
0.40  
0.34  
0.25  
MIN  
.095  
.008  
.008  
.005  
MAX  
.110  
.016  
.0135  
.010  
A
A1  
b
E1  
E
INDEX  
AREA  
c
D
E
E1  
e
SEE VARIATIONS  
SEE VARIATIONS  
10.03  
7.40  
10.68  
7.60  
.395  
.291  
.420  
.299  
1
2
α
h x 45°  
0.635 BASIC  
0.025 BASIC  
D
h
L
0.38  
0.50  
0.64  
1.02  
.015  
.020  
.025  
.040  
N
a
SEE VARIATIONS  
SEE VARIATIONS  
A
0°  
8°  
0°  
8°  
A1  
VARIATIONS  
- C -  
D mm.  
D (inch)  
N
MIN  
18.31  
MAX  
18.55  
MIN  
.720  
MAX  
.730  
e
SEATING  
PLANE  
56  
b
.10 (.004)  
C
Reference Doc.: JEDEC Publication 95, MO-118  
10-0034  
Ordering Information  
ICS952601yFLFT  
Example:  
ICS XXXX y F LF T  
Designation for tape and reel packaging  
Lead Free (optional)  
Package Type  
F = SSOP  
Revision Designator (will not correlate with datasheet revision)  
Device Type (consists of 3 or 4 digit numbers)  
Prefix  
ICS, AV = Standard Device  
0701G—10/13/04  
23  
Integrated  
Circuit  
ICS952601  
Systems, Inc.  
c
56-Lead 6.10 mm. Body, 0.50 mm. Pitch TSSOP  
N
(240 mil)  
(20 mil)  
In Millimeters  
COMMON DIMENSIONS COMMON DIMENSIONS  
In Inches  
L
SYMBOL  
MIN  
--  
0.05  
0.80  
0.17  
0.09  
MAX  
1.20  
0.15  
1.05  
0.27  
0.20  
MIN  
--  
.002  
.032  
.007  
.0035  
MAX  
.047  
.006  
.041  
.011  
.008  
E1  
E
A
A1  
A2  
b
INDEX  
AREA  
c
1
2
D
E
SEE VARIATIONS  
8.10 BASIC  
SEE VARIATIONS  
0.319 BASIC  
a
D
E1  
e
6.00  
0.50 BASIC  
6.20  
.236  
0.020 BASIC  
.244  
L
0.45  
0.75  
.018  
.030  
N
SEE VARIATIONS  
SEE VARIATIONS  
A
A2  
a
aaa  
0°  
--  
8°  
0.10  
0°  
--  
8°  
.004  
A1  
- C -  
VARIATIONS  
e
SEATING  
PLANE  
D mm.  
D (inch)  
b
N
MIN  
13.90  
MAX  
14.10  
MIN  
.547  
MAX  
.555  
aaa  
C
56  
Reference Doc.: JEDEC Publication 95, MO-153  
10-0039  
Ordering Information  
ICS952601yGLFT  
Example:  
ICS XXXX y G LF T  
Designation for tape and reel packaging  
Lead Free (optional)  
Package Type  
G = TSSOP  
Revision Designator (will not correlate with datasheet revision)  
DeviceType (consists of 3 or 4 digit numbers)  
Prefix  
ICS, AV = Standard Device  
0701G—10/13/04  
24  

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