ICS81006AKT [ICSI]

VCXO-TO-6 LVCMOS OUTPUTS; VCXO - TO- 6 LVCMOS输出
ICS81006AKT
型号: ICS81006AKT
厂家: INTEGRATED CIRCUIT SOLUTION INC    INTEGRATED CIRCUIT SOLUTION INC
描述:

VCXO-TO-6 LVCMOS OUTPUTS
VCXO - TO- 6 LVCMOS输出

晶体 外围集成电路 石英晶振 压控振荡器 输出元件 时钟
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
GENERAL DESCRIPTION  
FEATURES  
The ICS81006 is a high performance, low Six LVCMOS/LVTTL outputs, 20Ω nominal  
ICS  
jitter/low phase noise VCXO and is a  
member of the HiPerClockSfamily of high  
performance clock solutions from ICS. The  
ICS81006 works in conjunction with a  
output impedance  
HiPerClockS™  
Output Q5 can be selected for ÷1 or ÷2 frequency relative  
to the crystal frequency  
pullable crystal to generate an output clock over the  
range of 12MHz - 40MHz and has 6 LVCMOS outputs,  
effectively integrating a fanout buffer function.  
Output frequency range: 12MHz to 40MHz  
Crystal pull range:  
ꢀ0ppm ꢁtypicalꢂ  
Synchronous output enable places outputs in High-Z state  
On-chip filter onVIN to suppress noise modulation of VCXO  
VDD/VDDO combinations  
The frequency of the VCXO is adjusted by the VC control  
voltage input. The output range is 100ppm around the  
nominal crystal frequency. The VC control voltage range  
is 0 - VDD. The device is packaged in a small 4mm x 4mm  
VFQFN package and is ideal for use on space  
constrained boards typically encountered in ADSL/  
VDSL applications.  
3.3V/3.3V  
3.3V/2.5V  
3.3V/1.8V  
2.5V/2.5V  
2.5V/1.8V  
4mm x 4mm 20 Lead VFQFN package is ideal for space  
constrained designs  
0°C to 70°C ambient operating temperature  
Available in both standard and lead-free RoHS compliant  
packages  
BLOCK DIAGRAM  
PIN ASSIGNMENT  
ꢁPullupꢂ  
OE0  
SYNC  
Q0  
Q1  
Q2  
20 1ꢀ 18 17 16  
15 GND  
VC  
LP Filter  
XTAL_IN  
1
2
3
4
5
XTAL_OUT  
14 Q2  
13  
VDD  
VC  
VDDO  
XTAL_IN  
12 Q3  
VCXO  
DIV_SEL_Q5  
11 GND  
6
7
8
10  
XTAL_OUT  
Q3  
Q4  
ICS81006  
20-LeadVFQFN  
4mm x 4mm x 0.ꢀ5 package body  
K Package  
TopView  
0: ÷1  
1: ÷2  
Q5  
ꢁPulldownꢂ  
DIV_SEL_Q5  
ꢁPullupꢂ  
OE1  
SYNC  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
TABLE 1. PIN DESCRIPTIONS  
Number  
Name  
Type  
Description  
XTAL_IN,  
XTAL_OUT  
Crystal oscillator interface. XTAL_IN is the input.  
XTAL_OUT is the output.  
1, 2  
Input  
3
4
VDD  
VC  
Power  
Input  
Core supply pin.  
Control voltage input.  
Output divider select pin for Q5 output. When LOW, ÷1. When HIGH,  
÷2, LVCMOS/LVTTL interface levels.  
5
DIV_SEL_Q5 Input Pulldown  
Output enable pin. When HIGH, Q5 output is enabled.  
When LOW, forces Q5 to HiZ state. LVCMOS/LVTTL interface levels.  
6
OE1  
Input  
Power  
Output  
Power  
Input  
Pullup  
7, 11, 15, 1ꢀ  
GND  
Power supply ground.  
8, 10, 12,  
14, 16, 18  
Q5, Q4, Q3,  
Q2, Q1, Q0  
Single-ended clock outputs. LVCMOS/LVTTL interface levels.  
15Ω typical output impedance.  
Output supply pins.  
ꢀ, 13, 17  
VDDO  
Output enable pin. When HIGH, Q0:Q4 outputs are enabled. When  
LOW, forces Q0:Q4 to HiZ state. LVCMOS/LVTTL interface levels.  
20  
OE0  
Pullup  
NOTE: Pullup and Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.  
TABLE 2. PIN CHARACTERISTICS  
Symbol  
Parameter  
Test Conditions  
Minimum  
Typical Maximum Units  
CIN  
Input Capacitance OE0, OE1  
4
pF  
pF  
V
DD = VDDO = 3.465V  
3
4
V
DD = 3.465V or 2.625V,  
pF  
pF  
CPD  
Power Dissipation Capacitance  
V
DDO = 2.625V  
VDD = 3.465V or 2.625V,  
DDO = 2V  
6
V
RPULLUP  
Input Pullup Resistor  
51  
51  
kΩ  
kΩ  
Ω
RPULLDOWN  
Input Pulldown Resistor  
V
DDO = 3.3V  
20  
25  
38  
ROUT  
Output Impedance  
VDDO = 2.5V  
VDDO = 1.8V  
Ω
Ω
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
ABSOLUTE MAXIMUM RATINGS  
SupplyVoltage, V  
4.6V  
NOTE: Stresses beyond those listed under Absolute  
Maximum Ratings may cause permanent damage to the  
device.These ratings are stress specifications only.Functional  
operation of product at these conditions or any conditions be-  
yond those listed in the DC Characteristics or AC Character-  
istics is not implied. Exposure to absolute maximum rating  
conditions for extended periods may affect product reliability.  
DD  
Inputs, V  
-0.5V to VDD + 0.5 V  
-0.5V to VDD + 0.5V  
38.5°C/W ꢁ0 mpsꢂ  
-65°C to 150°C  
I
Outputs, VO  
PackageThermal Impedance, θ  
JA  
StorageTemperature, T  
STG  
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VDD = 3.3V 5ꢃ, VDDO = 3.3V 5ꢃ = 2.5V 5= 1.8V 0.2V, TA = 0°C TO 70°C  
Symbol Parameter Test Conditions Minimum Typical Maximum Units  
VDD  
Core Supply Voltage  
3.135  
3.135  
2.375  
1.6  
3.3  
3.3  
2.5  
1.8  
3.465  
3.465  
2.625  
2.0  
V
V
VDDO  
Output Supply Voltage  
V
V
IDD  
Power Supply Current  
Output Supply Current  
50  
mA  
mA  
IDDO  
20  
TABLE 3B. POWER SUPPLY DC CHARACTERISTICS, VDD = 2.5V 5ꢃ, VDDO = 2.5V 5= 1.8V 0.2V,TA = 0°C TO 70°C  
Symbol Parameter Test Conditions Minimum Typical Maximum Units  
VDD  
Core Supply Voltage  
2.375  
2.375  
1.6  
2.5  
2.5  
1.8  
2.625  
2.625  
2.0  
V
V
VDDO  
Output Supply Voltage  
V
IDD  
Power Supply Current  
Output Supply Current  
50  
mA  
mA  
IDDO  
20  
TABLE 3C. LVCMOS/LVTTL DC CHARACTERISTICS, TA = 0°C TO 85°C  
Symbol Parameter Test Conditions  
Minimum Typical Maximum Units  
V
V
V
V
DD = 3.3V 5ꢃ  
DD = 2.5V 5ꢃ  
DD = 3.3V 5ꢃ  
DD = 2.5V 5ꢃ  
2
VDD + 0.3  
VDD + 0.3  
0.8  
V
V
VIH  
Input High Voltage  
1.7  
-0.3  
-0.3  
0
V
OE0, OE1,  
DIV_SEL_Q5  
VIL  
VC  
IIH  
Input Low Voltage  
0.7  
V
VCXO Control Voltage  
VDD  
V
DIV_SEL_Q5  
V
V
V
V
DD = 3.3V or 2.5V 5ꢃ  
DD = 3.3V or 2.5V 5ꢃ  
DD = 3.3V or 2.5V 5ꢃ  
DD = 3.3V or 2.5V 5ꢃ  
150  
µA  
µA  
µA  
µA  
µA  
V
Input High Current  
Input Low Current  
OE0, OE1  
DIV_SEL_Q5  
OE0, OE1  
5
-5  
IIL  
II  
-150  
-100  
2.6  
Input Current of VC pin  
VDD = 3.465V or 2.625V  
VDDO = 3.3V 5ꢃ  
100  
VOH  
Output High Voltage;NOTE 1  
V
DDO = 2.5V 5ꢃ  
DDO = 1.8V 0.2V  
DDO = 3.3V or 2.5V 5ꢃ  
DDO = 1.8V 0.2V  
1.8  
V
V
1.5  
V
V
0.5  
0.4  
V
VOL  
Output Low Voltage;NOTE 1  
V
V
NOTE 1: Outputs terminated with 50Ω to VDDO/2. See Parameter Measurement section, "Load Test Circuit" diagrams.  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
TABLE 4A. AC CHARACTERISTICS, VDD =VDDO = 3.3V 5ꢃ, TA = 0°C TO 70°C  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
fOUT  
Output Frequency  
12  
1ꢀ.44  
40  
MHz  
RMS Phase Jitter ꢁRandomꢂ;  
NOTE 1  
tjitꢁØꢂ  
Integration Range: 1kHz- 1MHz  
0.35  
ps  
Q0:Q4  
Q0:Q5  
30  
100  
700  
56  
ps  
ps  
ps  
Output Skew;  
NOTE 2, 3  
tskꢁoꢂ  
DIV_SEL_Q5 = ÷1  
20ꢃ to 80ꢃ  
tR / tF  
odc  
Output Rise/Fall Time  
Output Duty Cycle  
200  
44  
NOTE 1: Please refer to the Phase Noise Plot.  
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.  
Measured at the output differential cross points.  
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.  
TABLE 4B. AC CHARACTERISTICS, VDD = 3.3V 5ꢃ, VDDO = 2.5V 5ꢃ, TA = 0°C TO 70°C  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
fOUT  
Output Frequency  
12  
1ꢀ.44  
40  
MHz  
RMS Phase Jitter ꢁRandomꢂ;  
NOTE 1  
tjitꢁØꢂ  
Integration Range: 1kHz- 1MHz  
0.38  
ps  
Q0:Q4  
Q0:Q5  
20  
ꢀ0  
ps  
ps  
ps  
Output Skew;  
NOTE 2, 3  
tskꢁoꢂ  
DIV_SEL_Q5 = ÷1  
20ꢃ to 80ꢃ  
tR / tF  
odc  
Output Rise/Fall Time  
Output Duty Cycle  
300  
45  
800  
55  
NOTE 1: Please refer to the Phase Noise Plot.  
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.  
Measured at the output differential cross points.  
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.  
TABLE 4C. AC CHARACTERISTICS, VDD = 3.3V 5ꢃ, VDDO = 1.8V 0.2V, TA = 0°C TO 70°C  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
fOUT  
Output Frequency  
12  
1ꢀ.44  
40  
MHz  
RMS Phase Jitter ꢁRandomꢂ;  
NOTE 1  
tjitꢁØꢂ  
Integration Range: 1kHz-1MHz  
0.27  
ps  
Q0:Q4  
Q0:Q5  
46  
175  
1400  
56  
ps  
ps  
ps  
Output Skew;  
NOTE 2, 3  
tskꢁoꢂ  
DIV_SEL_Q5 = ÷1  
20ꢃ to 80ꢃ  
tR / tF  
odc  
Output Rise/Fall Time  
Output Duty Cycle  
450  
44  
NOTE 1: Please refer to the Phase Noise Plot.  
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.  
Measured at the output differential cross points.  
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.  
81006AK  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
TABLE 4D. AC CHARACTERISTICS, VDD =VDDO = 2.5V 5ꢃ, TA = 0°C TO 70°C  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
fOUT  
Output Frequency  
12  
1ꢀ.44  
40  
MHz  
RMS Phase Jitter ꢁRandomꢂ;  
NOTE 1  
tjitꢁØꢂ  
Integration Range: 1kHz-1MHz  
0.28  
ps  
Q0:Q4  
Q0:Q5  
25  
100  
800  
55  
ps  
ps  
ps  
Output Skew;  
NOTE 2, 3  
tskꢁoꢂ  
DIV_SEL_Q5 = ÷1  
20ꢃ to 80ꢃ  
tR / tF  
odc  
Output Rise/Fall Time  
Output Duty Cycle  
300  
45  
NOTE 1: Please refer to the Phase Noise Plot.  
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.  
Measured at the output differential cross points.  
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.  
TABLE 4E. AC CHARACTERISTICS, VDD = 2.5V 5ꢃ, VDDO = 1.8V 0.2V, TA = 0°C TO 70°C  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
fOUT  
Output Frequency  
12  
1ꢀ.44  
40  
MHz  
RMS Phase Jitter ꢁRandomꢂ;  
NOTE 1  
tjitꢁØꢂ  
Integration Range: 1kHz-1MHz  
0.26  
ps  
Q0:Q4  
Q0:Q5  
40  
175  
1400  
60  
ps  
ps  
ps  
Output Skew;  
NOTE 2, 3  
tskꢁoꢂ  
DIV_SEL_Q5 = ÷1  
20ꢃ to 80ꢃ  
tR / tF  
odc  
Output Rise/Fall Time  
Output Duty Cycle  
450  
40  
NOTE 1: Please refer to the Phase Noise Plot.  
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.  
Measured at the output differential cross points.  
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
TYPICAL PHASE NOISE AT 19.44MHZ @ 3.3V CORE/3.3V OUTPUT  
0
-10  
-20  
19.44MHz  
RMS Phase Jitter ꢁRandomꢂ  
1kHz to 1MHz = 0.35ps ꢁtypicalꢂ  
-30  
-40  
-50  
-60  
-70  
-80  
-ꢀ0  
-100  
-110  
-120  
-130  
-140  
-150  
-160  
-170  
-180  
-1ꢀ0  
100  
1k  
10k  
OFFSET FREQUENCY (HZ)  
100k  
1M  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
PARAMETER MEASUREMENT INFORMATION  
1.65V 5ꢃ  
2.05V 5ꢃ 1.25V 5ꢃ  
SCOPE  
SCOPE  
VDD,  
VDDO  
VDD  
VDDO  
Qx  
Qx  
LVCMOS  
GND  
LVCMOS  
GND  
-1.65V 5ꢃ  
-1.25V 5ꢃ  
3.3V CORE/3.3V OUTPUT LOAD ACTEST CIRCUIT  
3.3V CORE/2.5V OUTPUT LOAD ACTEST CIRCUIT  
1.25V 5ꢃ  
2.4V 0.065V 0.ꢀV 0.1V  
SCOPE  
SCOPE  
VDD  
VDD,  
VDDO  
VDDO  
Qx  
Qx  
LVCMOS  
LVCMOS  
GND  
GND  
-1.25V 5ꢃ  
-0.ꢀV 0.1V  
3.3V CORE/1.8V OUTPUT LOAD ACTEST CIRCUIT  
2.5V CORE/2.5V OUTPUT LOAD ACTEST CIRCUIT  
1.6V 0.025V  
0.ꢀV 0.1V  
Phase Noise Plot  
SCOPE  
VDD  
Phase Noise Mask  
VDDO  
Qx  
LVCMOS  
GND  
Offset Frequency  
f1  
f2  
RMS Jitter = Area Under the Masked Phase Noise Plot  
-0.ꢀV 0.1V  
2.5 CORE/1.8V OUTPUT LOAD ACTEST CIRCUIT  
RMS PHASE JITTER  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
VDD  
VDDO  
2
Qx  
Qy  
2
Q0:Q5  
tPW  
tPERIOD  
VDDO  
2
tskꢁoꢂ  
tPW  
x 100ꢃ  
odc =  
tPERIOD  
OUTPUT SKEW  
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD  
80ꢃ  
tF  
80ꢃ  
20ꢃ  
20ꢃ  
Clock  
Outputs  
tR  
OUTPUT RISE/FALL TIME  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
APPLICATION INFORMATION  
VCXO CRYSTAL SELECTION  
Choosing a crystal with the correct characteristics is one of range and accuracy of a VCXO. Below are the key variables  
the most critical steps in using a Voltage Controlled Crystal and an example of using the crystal parameters to calculate  
Oscillator ꢁVCXOꢂ. The crystal parameters affect the tuning the tuning range of the VCXO.  
VC  
Oscillator  
Control Voltage  
CV  
CV  
VCXO ꢁInternalꢂ  
XTAL  
CS1  
CS2  
CL1  
CL2  
Optional  
FIGURE 1: VCXO OSCILLATOR CIRCUIT  
CL1, CL2 Load tuning capacitance used for fine tuning or  
centering nominal frequency  
VC Control voltage used to tune frequency  
CV Varactor capacitance, varies due to the change in  
control voltage  
CS1, CS2 Stray Capacitance caused by pads, vias, and other  
board parasitics  
TABLE 5. EXAMPLE CRYSTAL PARAMETERS  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
fN  
fT  
fS  
Nominal Frequency  
Frequency Tolerance  
Frequency Stability  
Operating Temperature Range  
Load Capacitance  
Shunt Capacitance  
Pullability Ratio  
1ꢀ.44  
MHz  
ppm  
ppm  
°C  
20  
20  
0
70  
CL  
12  
4
pF  
CO  
pF  
C0, C1  
ESR  
220  
240  
20  
1
Equivalent Series Resistance  
Drive Level  
mW  
ppm  
Aging @ 25°C  
3 per year  
Mode of Operation  
Fundamental  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
TABLE 6. VARACTOR PARAMETERS  
Symbol Parameter  
Test Conditions  
VC = 0V  
Minimum Typical Maximum Units  
CV_LOW  
CV_HIGH  
Low Varactor Capacitance  
High Varactor Capacitance  
15.4  
2ꢀ.6  
pF  
pF  
VC = 3.3V  
FORMULAS  
(
CL1 + CS1 + CV _ High  
)
+
(
CL2 + CS 2 + CV _ High  
)
(
CL1 + CS1 + CV _ Low  
)
+
(
CL2 + CS 2 + CV _ Low  
)
CHigh  
=
CLow  
=
(
CL1 + CS1 + CV _ High  
)
(
CL2 + CS 2 + CV _ High  
)
(
CL1 + CS1 + CV _ Low  
)
(
CL2 + CS 2 + CV _ Low  
)
• CLow is the effective capacitance due to the low varactor capacitance, load capacitance and stray capacitance.  
CLow determines the high frequency component on the TPR.  
• CHigh is the effective capacitance due to the high varactor capacitance, load capacitance and stray capacitance.  
CHigh determines the low frequency component on the TPR.  
1
1
Total Pull Range (TPR) =  
106  
CLow  
CHigh  
C
0 C  
1
C
0
C
0 C  
1
C
0
2⋅  
1+  
2⋅  
1+  
Absolute Pull Range ꢁAPRꢂ = Total Pull Range – ꢁFrequency Tolerance + Frequency Stability + Agingꢂ  
EXAMPLE CALCULATIONS  
the inaccuracy due to aging is 15ppm. Third, though many  
boards will not require load tuning capacitors ꢁCL1, CL2ꢂ, it is  
recommended for long-term consistent performance of the  
system that two tuning capacitor pads be placed into every  
design.Typical values for the load tuning capacitors will range  
from 0 to 4pF.  
Using the tables and figures above, we can now calculate the  
TPR and APR of the VCXO using the example crystal  
parameters. For the numerical example below there were some  
assumptions made. First, the stray capacitance ꢁCS1, CS2ꢂ, which  
is all the excess capacitance due to board parasitic, is 4pF.  
Second, the expected lifetime of the project is 5 years; hence  
(
0 + 4pf + 29.6pf  
0 + 4pf + 29.6pf  
)
+
(
0 + 4pf + 29.6pf  
)
= 16.8pf  
(
0 + 4pf +15.4pf  
0 + 4pf +15.4pf  
)
+
(
0 + 4pf +15.4pf  
)
= 9.7 pf  
CHigh  
=
CLow  
=
(
)
(
0 + 4pf + 29.6pf  
)
(
)
(0 + 4pf +15.4pf  
)
1
1
6
TPR =  
10 ⋅ = 226.5ppm  
9.7 pF  
16.8pF  
22201+  
22201+  
4pF  
4pF  
TPR = 113.25ppm  
APR = 113.25ppm – ꢁ20ppm + 20ppm + 15ppmꢂ = 58.25ppm  
The example above will ensure a total pull range of with better pullability ꢁC0/C1 ratioꢂ can be used. Also, with the  
113.25 ppm with an APR of 58.25ppm. Many times, board equations above, one can vary the frequency tolerance,  
designers may select their own crystal based on their temperature stability, and aging or shunt capacitance to achieve  
application. If the application requires a tighter APR, a crystal the required pullability.  
81006AK  
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REV.A JANUARY 4, 2006  
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ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS  
INPUTS:  
OUTPUTS:  
CONTROL PINS:  
LVCMOS OUTPUT:  
All control pins have internal pull-ups or pull-downs; additional All unused LVCMOS output can be left floating. We  
resistance is not required but can be added for additional recommend that there is no trace attached.  
protection. A 1kΩ resistor can be used.The VC pin can not be  
floated.  
SCHEMATIC EXAMPLE  
Figure 2 shows an example of ICS81006 application sche- drivers, series termination example is shown in the sche-  
matic.The decoupling capacitors should be located as close matic. Additional termination approaches are shown in the  
as possible to the power pin. For the LVCMOS 20Ω output LVCMOS Termination Application Note.  
Pull-up VDD  
example  
VDDO  
R4  
1K  
Quartz crystal should be  
placed as close to the  
device as possible.  
VDD  
R1  
30  
Zo = 50  
C1  
U1  
SPARE  
1
2
3
4
5
15  
14  
13  
12  
11  
XTAL_IN  
XTAL_OUT  
VDD  
GND  
Q2  
VDDO  
Q3  
XTAL  
VC  
DIV_SEL_Q5  
GND  
C2  
SPARE  
VC  
VC = 0V to VDD  
81006  
Pull-down  
example  
R3  
1K  
R2  
30  
Zo = 50  
VDD  
R5  
1K  
U1-3ꢂ  
U1-ꢀꢂ  
U1-13ꢂ ꢁU1-17ꢂ  
VDD  
VDDO  
Unused outputs can be left floating. There should be  
no trace attached to unused outputs. Device  
characterized and specification limits set with all  
outputs terminated.  
C7  
10uf  
C6  
0.1uF  
C5  
0.1uF  
C4  
0.1uF  
C3  
0.1uF  
FIGURE 2. ICS81006 SCHEMATIC EXAMPLE  
81006AK  
www.icst.com/products/hiperclocks.html  
REV.A JANUARY 4, 2006  
11  
ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
RELIABILITY INFORMATION  
TABLE 7. θJAVS. AIR FLOWT ABLE FOR 20 LEAD VFQFN  
θ
JA by Velocity (Meters Per Second)  
0
1
2.5  
116.ꢀ°C/W  
33.4°C/W  
Single-Layer PCB, JEDEC Standard Test Boards  
Multi-Layer PCB, JEDEC Standard Test Boards  
141.7°C/W  
38.5°C/W  
126.0°C/W  
35.0°C/W  
NOTE: Most modern PCB designs use multi-layered boards.The data in the second row pertains to most designs.  
TRANSISTOR COUNT  
The transistor count for ICS81006 is: ꢀ83  
81006AK  
www.icst.com/products/hiperclocks.html  
REV.A JANUARY 4, 2006  
12  
ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
PACKAGE OUTLINE - K SUFFIX FOR 20 LEAD VFQFN  
TABLE 8. PACKAGE DIMENSIONS  
JEDEC VARIATION  
ALL DIMENSIONS IN MILLIMETERS  
SYMBOL  
MINIMUM  
MAXIMUM  
N
A
20  
0.80  
0
1.0  
A1  
A3  
b
0.05  
0.25 Reference  
0.18  
0.30  
e
0.50 BASIC  
ND  
NE  
D
5
5
4.0  
D2  
E
0.75  
2.80  
4.0  
E2  
L
0.75  
0.35  
2.80  
0.75  
Reference Document: JEDEC Publication ꢀ5, MO-220  
81006AK  
www.icst.com/products/hiperclocks.html  
REV.A JANUARY 4, 2006  
13  
ICS81006  
Integrated  
Circuit  
Systems, Inc.  
VCXO-TO-6 LVCMOS OUTPUTS  
TABLE 9. ORDERING INFORMATION  
Part/Order Number  
ICS81006AK  
Marking  
Package  
Shipping Packaging  
tube  
Temperature  
0°C to 70°C  
0°C to 70°C  
0°C to 70°C  
0°C to 70°C  
81006A  
81006A  
TBD  
20 lead VFQFN  
ICS81006AKT  
20 lead VFQFN  
2500 tape & reel  
tube  
ICS81006AKLF  
ICS81006AKLFT  
20 lead "Lead-Free" VFQFN  
20 lead "Lead-Free" VFQFN  
TBD  
2500 tape & reel  
NOTE: Parts that are ordered with an "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.  
The aforementioned trademark, HiPerClockS is a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.  
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated ꢁICSꢂ assumes no responsibility for either its use  
or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use  
in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are  
not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS  
product for use in life support devices or critical medical instruments.  
81006AK  
www.icst.com/products/hiperclocks.html  
REV.A JANUARY 4, 2006  
14  

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