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5V50012LCGLF

型号：

5V50012LCGLF

品牌：

IDT[ INTEGRATED DEVICE TECHNOLOGY ]

页数：

11 页

PDF大小：

197 K

下载PDF手册
PRELIMINARY DATASHEET  
CRYSTAL-FREE CLOCK SOURCE  
IDT5V50012  
Description  
Features  
The IDT5V50012 is a selectable frequency clock generator  
that includes an onboard MEMS frequency reference – a  
crystal is not required for operation. The resonant  
frequency reference is fabbed directly on-chip with  
Micro-Electro-Mechanical Systems (MEMS)  
nanotechnology.  
• Packaged in 16LCC  
• Replaces crystals and oscillators  
• Shock resistant  
• Duty cycle of 45/55  
• Operating voltage of 3.3 V  
It is intended for general purpose clock generation in  
applications where small size and ruggedness is important.  
Four versions are offered: 40 MHz, 66.66 MHz, 80 MHz,  
and 133.33 MHz. Each provides two levels of spread  
spectrum modulation for EMI reduction.  
• Advanced, low-power CMOS process  
• Small and rugged MEMS frequency reference  
• Spread Spectrum for EMI reduction  
The IDT5V50012 replaces crystal oscillators to maximize  
board space and reduce system costs.  
Block Diagram  
VDD  
MEMS  
Resonator  
Temperature  
Compensated  
Oscillator  
Multiplying  
Spread Spectrum  
PLL  
3
S2:0  
SSEN  
GND  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
1
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Frequency Select Table (40 MHz version)  
Pin Assignment  
S2 S1 S0 Output Freq.  
Spread  
Down  
Amount  
1%  
0
0
0
0
0
1
40  
40  
Down  
3%  
2
1
16 15  
3
4
14  
13  
NC  
GND  
NC  
Frequency Select Table (66.66 MHz version)  
VDD  
S2 S1 S0 Output Freq.  
Spread  
Down  
Amount  
1%  
0
0
1
1
0
1
66.66  
66.66  
Down  
3%  
12 SSEN  
11  
POUT  
GND  
5
6
Frequency Select Table (80 MHz version)  
S1  
7
8
9
10  
S2 S1 S0 Output Freq.  
Spread  
Center  
Center  
Amount  
1%  
1
1
0
0
0
1
80  
80  
3%  
Frequency Select Table (133.33 MHz version)  
S2 S1 S0 Output Freq.  
Spread  
Center  
Center  
Amount  
1%  
1
1
1
1
0
1
133.33  
133.33  
3%  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
2
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Pin Descriptions  
Pin  
Pin  
Pin  
Pin Description  
Number  
Name  
Type  
1
2
NC  
GND  
GND  
NC  
—
No Connect. Do not connect this pin to anything.  
Power Ground pin.  
Power Ground pin.  
3
4
—
No Connect. Do not connect this pin to anything.  
5
POUT  
GND  
S0  
Output Test output. Do not connect.  
Power Ground pin.  
6
7
Input  
Frequency select 0 (see tables above).  
8
CLK  
VDD  
S2  
Output Spread Spectrum selectable clock output (see tables above).  
Power Connect to 3.3 V.  
9
10  
11  
12  
13  
14  
15  
16  
Input  
Input  
Input  
Frequency select 2 (see tables above).  
Frequency select 1 (see tables above).  
Low to enable spread.  
S1  
SSEN  
VDD  
NC  
Power Connect to 3.3 V.  
—
No Connect. Do not connect this pin to anything.  
VDD  
PEN  
Power Connect to 3.3 V.  
Input  
Test input. Connect high.  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
3
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
External Components  
The IDT5V50012 requires a minimum number of external  
components for proper operation.  
PCB Layout Recommendations  
For optimum device performance and lowest output phase  
noise, the following guidelines should be observed.  
Decoupling Capacitor  
A decoupling capacitor of 0.01µF must be connected  
between each VDD and GND, as close to these pins as  
possible. For optimum device performance, the decoupling  
capacitor should be mounted on the component side of the  
PCB. Avoid the use of vias in the decoupling circuit.  
1) The 0.01µF decoupling capacitor should be mounted on  
the component side of the board as close to the VDD pin as  
possible. No vias should be used between decoupling  
capacitor and VDD pin. The PCB trace to VDD pin should  
be kept as short as possible, as should the PCB trace to the  
ground via.  
Series Termination Resistor  
2) To minimize EMI, the 33Ω series termination resistor  
When the PCB trace between the clock outputs and the  
loads are over 1 inch, series termination should be used. To  
series terminate a 50Ω trace (a commonly used trace  
impedance) place a 33Ωresistor in series with the clock line,  
as close to the clock output pin as possible. The nominal  
impedance of the clock output is 20Ω.  
should be placed close to the clock output.  
3) An optimum layout is one with all components on the  
same side of the board, minimizing vias through other signal  
layers. Other signal traces should be routed away from the  
IDT5V50012. This includes signal traces just underneath  
the device, or on layers adjacent to the ground plane layer  
used by the device.  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
4
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Absolute Maximum Ratings  
Stresses above the ratings listed below can cause permanent damage to the IDT5V50012. These ratings, which  
are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at  
these or any other conditions above those indicated in the operational sections of the specifications is not implied.  
Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical  
parameters are guaranteed only over the recommended operating temperature range.  
Item  
Rating  
Supply Voltage, VDD  
All Inputs and Outputs  
Storage Temperature  
Junction Temperature  
Soldering Temperature  
7 V  
-0.5 V to VDD+0.5 V  
-65 to +150° C  
125°C  
260°C  
Recommended Operation Conditions  
Parameter  
Min.  
0
Typ.  
Max.  
+70  
+3.45  
4
Units  
°C  
Ambient Operating Temperature  
Power Supply Voltage (measured with respect to GND)  
Power Supply Ramp Time  
+3.15  
+3.3V  
V
ms  
DC Electrical Characteristics  
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70°C  
Parameter  
Symbol  
Conditions  
Min.  
Typ.  
10  
Max.  
Units  
mA  
Operating Supply Current  
IDD  
No load, F  
= 66 MHz  
OUT  
Power-Down Supply  
Current  
10  
µA  
Input High Voltage, binary  
inputs  
V
0.7 X  
VDD  
V
IH  
(CMOS)  
Input Low Voltage, binary  
inputs  
V
0.3XVDD  
(CMOS)  
IL  
Output High Voltage  
Output Low Voltage  
Short Circuit Current  
Input Capacitance  
V
I
I
= -5 mA  
VDD-0.4  
V
V
OH  
OH  
V
= 5 mA  
0.4  
OL  
OL  
I
CLK output  
60  
5
mA  
pF  
Ω
OS  
C
IN  
Nominal Output  
Impedance  
Z
20  
OUT  
On-Chip Pull-up Resistor  
R
Binary inputs  
TBD  
kΩ  
PU  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
5
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
AC Electrical Characteristics  
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70° C  
Parameter  
Symbol  
Conditions  
Min.  
-30  
Typ. Max. Units  
Frequency Accuracy  
T = 25°C  
30  
ppm  
ppm  
Frequency Stability over  
temperature  
Over temperature  
range  
-100  
100  
Aging, first year  
0
20  
55  
ppm  
%
Output Clock Duty Cycle  
t - t  
At VDD/2, Note 2,  
Figures 1 and 2  
45  
50  
1
2
Output Rise Time  
Output Fall Time  
Power-up Time  
t
t
20% to 80%,  
Note 2, Figure 3  
1.5  
1.5  
ns  
ns  
3
4
20% to 80%,  
Note 2, Figure 3  
t
Time to stable clock  
1
ms  
PU  
from power-up, Figure 4  
Short-Term Jitter, Peak-to-Peak  
One-Sigma Clock Period Jitter  
t
Figure 6  
200  
ps  
ps  
jit  
TBD  
Note 2: Measured with a 15 pF load.  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
6
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Timing Diagrams  
t1  
t2  
VDDs  
Outputs  
VDD  
0.1µF  
CLOAD  
DUT  
50% of VDD  
0V  
GND  
Clock  
Output  
Figure 2: Duty Cycle Definitions  
Figure 1: Test and Measurement Setup  
Power Up  
Time  
VCO Ramp  
Time  
PLL Locked  
VDD  
t4  
t3  
VDD  
80% of VDD  
0V  
VDD  
20% of VDD  
0V  
Clock  
Output  
0V  
0 ms  
4 ms  
10 ms  
Figure 4: Power Up and PLL Lock Timing  
Figure 3: Rise and Fall Time Definitions  
PDTS  
1.5 V  
1.5 V  
1%  
tDIS  
Mean value  
tEN  
VOH  
CLK  
Outputs  
Short-term jitter  
0 V  
Figure 6: Short Term Jitter Definition  
Figure 5: PDTS to Stable Clock Output Timing  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
7
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Marking Diagram  
2
1
16 15  
3
14  
13  
4 TBD  
12  
11  
5
6
7
8
9
10  
Notes:  
1. ###### is the lot number.  
2. YYWW is the last two digits of the year and week that the part was assembled.  
3. “LF” denotes RoHS compliant package.  
4. Bottom marking: country of origin if not USA.  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
8
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Package Outline and Package Dimensions (16LCC, 0.240 x 0.175 cav.)  
Package dimensions are kept current with JEDEC Publication No. 95  
Ordering Information  
Part / Order Number  
5V50012LCG  
Marking  
TBD  
Shipping Packaging  
Tubes  
Package  
16LCC  
16LCC  
Temperature  
0 to +70° C  
0 to +70° C  
5V50012LCG8  
TBD  
Tape and Reel  
Parts that are ordered with a “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant.  
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes  
no responsibility for either its use or for the 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 IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT  
does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
9
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Revision History  
Rev. Originator  
Date  
Description of Change  
A
B
J.Gazda  
06/11/07 New device. Preliminary release.  
06/18/07 Changed output frequency from 60 MHz to 66.66 MHz in the “Frequency Select Table  
(66.66 MHz version)” table on page 2.  
IDT™ CRYSTAL-FREE CLOCK SOURCE  
10  
IDT5V50012  
REV B 061807  
IDT5V50012  
CRYSTAL-FREE CLOCK SOURCE  
SYNTHESIZERS  
Innovate with IDT and accelerate your future networks. Contact:  
www.IDT.com  
For Sales  
800-345-7015  
For Tech Support  
408-284-4522  
408-284-8200  
www.idt.com/go/clockhelp  
Fax: 408-284-2775  
Corporate Headquarters  
Integrated Device Technology, Inc.  
www.idt.com  
© 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device  
Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered  
trademarks used to identify products or services of their respective owners.  
Printed in USA  
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