MK3711DMILFTR

DATASHEET MK3711 LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO Description Features The MK3711D is a drop-in replacement for the original MK3711S device. Compared to these earlier devices, the MK3711D offers a wider operating frequency range and improved power supply noise rejection. • MK3711D is a drop-in replacement for the earlier Used in conjunction with an external pullable quartz crystal, this monolithic integrated circuit replaces more costly hybrid (canned) VCXO devices. The MK3711 is designed primarily for data and clock recovery applications within end products such as ADSL modems, set-top box receivers, and telecom systems. • Uses an inexpensive 8 to 16 MHz external crystal • On-chip VCXO with guaranteed pull range of ±115 ppm MK3711S device • MK3711D offers an 8-16 MHz output frequency range and improved power supply noise rejection minimum • • • • The MK3711D exhibits a moderate VCXO gain of 120ppm/V typical, when used with a high quality external pullable quartz crystal. The frequency of the on-chip VCXO is adjusted by an external control voltage input into pin VIN. Since VIN is a high impedance input, it can be driven directly from an PWM RC integrator circuit. Frequency output increases with VIN voltage input. The usable range of VIN is 0 to 3V. VCXO tuning voltage 0 to 3.3 V Packaged in 8 pin SOIC (150 mil wide) Pb (lead) free package Industrial temperature range available MK3711B is Obsolete Block Diagram VDD VIN 8-16 MHz Pullable Crystal X1 X2 Voltage Controlled Crystal Oscillator 8-16 MHz GND IDT™ LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO 1 MK3711 REV K 051310 MK3711 LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO VCXO AND MULTIPLIER Pin Assignment X1 1 8 X2 VDD 2 7 DC VI N 3 6 REF GND 4 5 DC MK 3 7 1 1 D 8 P i n ( 1 5 0 mi l ) S OI C Pin Descriptions Pin Number Pin Name Pin Type 1 XI Input Crystal connection. Connect to the external pullable crystal. 2 VDD Power Connect to +3.3 V (0.01uf decoupling capacitor recommended). 3 VIN Input Voltage input to VCXO — 0 to 3.3 V analog input which controls the oscillation frequency of the VCXO. 4 GND Power Connect to ground. 5 DC — 6 REF Output 7 DC — 8 X2 Input IDT™ LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO Pin Description Do not connect anything to this pin. VCXO CMOS level clock output matches the nominal frequency of the crystal. Do not connect anything to this pin. Crystal connection. Connect to the external pullable crystal. 2 MK3711 REV K 051310 MK3711 LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO VCXO AND MULTIPLIER External Component Selection pF. Contact IDT applications regarding the use of a crystal below 13.5 MHz. The MK3711 requires a minimum number of external components for proper operation. The external crystal must be connected as close to the chip as possible and should be on the same side of the PCB as the MK3711. There should be no vias between the crystal pins and the X1 and X2 device pins. There should be no signal traces underneath or close to the crystal. See application note MAN05. Decoupling Capacitor A decoupling capacitor of 0.01µF must be connected between VDD (pin 2) and GND (pin 4), 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. Crystal Tuning Load Capacitors The crystal traces should include pads for small fixed capacitors, one between X1 and ground, and another between X2 and ground. The need for these capacitors is determined at system prototype evaluation, and is influenced by the particular crystal used (manufacture and frequency) and by PCB layout. The typical required capacitor value is 1 to 4 pF. Series Termination Resistor When the PCB trace between the clock output (CLK, pin 5) and the load is over 1 inch, series termination should be used. To series terminate a 50Ω trace (a commonly used trace impedance) place a 33Ω resistor in series with the clock line, as close to the clock output pin as possible. The nominal impedance of the clock output is 20Ω. The procedure for determining the value of these capacitors can be found in application note MAN05. Quartz Crystal The MK3711 VCXO function consists of the external crystal and the integrated VCXO oscillator circuit. To assure the best system performance (frequency pull range) and reliability, a crystal device with the recommended parameters (shown below) must be used, and the layout guidelines discussed in the following section shown must be followed. The frequency of oscillation of a quartz crystal is determined by its “cut” and by the load capacitors connected to it. The MK3711 incorporates on-chip variable load capacitors that “pull” (change) the frequency of the crystal. The crystal specified for use with the MK3711 is designed to have zero frequency error when the total of on-chip + stray capacitance is 14 pF. Recommended Crystal Parameters: Initial Accuracy at 25° C Temperature Stability Aging Load Capacitance Shunt Capacitance, C0 C0/C1 Ratio Equivalent Series Resistance ±20 ppm ±30 ppm ±20 ppm 14 pf 7 pF Max 250 Max 35 Ω Max For crystal frequencies between 13.5 MHz and 16 MHz, the nominal crystal load capacitance specification should be 14 IDT™ LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO 3 MK3711 REV K 051310 MK3711 LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO VCXO AND MULTIPLIER Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK3711. 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 7V All Inputs and Outputs -0.5 V to VDD+0.5 V Ambient Operating Temperature (commercial) 0 to +70° C Ambient Operating Temperature (industrial) -40 to +85° C Storage Temperature -65 to +150° C Soldering Temperature 260° C Recommended Operating Conditions Parameter Min. Ambient Operating Temperature (commercial) Ambient Operating Temperature (industrial) Power Supply Voltage (measured in respect to GND) Reference crystal parameters IDT™ LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO Typ. Max. Units 0 +70 °C -40 +85 °C +3.15 +3.45 V Refer to page 3 4 MK3711 REV K 051310 MK3711 LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO VCXO AND MULTIPLIER DC Electrical Characteristics VDD=3.3 V ±5% , Ambient temperature -40 to +85° C, unless stated otherwise Parameter Symbol Conditions Operating Voltage VDD Output High Voltage VOH IOH = -12 mA Output Low Voltage VOL IOL = 12 mA Output High Voltage (CMOS Level) VOH IOH = -4 mA Operating Supply Current IDD Output = 12 MHz, no load Short Circuit Current IOS VIN, VCXO Control Voltage VIA Min. Typ. 3.15 Max. Units 3.45 V 2.4 V 0.4 V VDD-0.4 V 7 mA ±50 mA 0 3.3 V AC Electrical Characteristics VDD = 3.3 V ±5%, Ambient Temperature -40 to +85° C, unless stated otherwise Parameter Symbol Output Frequency FO Crystal Pullability, Note 2 FP Conditions Min. Typ. 8 0V< VIN < 3.3 V, Note 1 Max. Units 16 MHz ±115 ppm VCXO Gain MK3711D, Note 3 VIN = VDD/2 ± 1 V, Note 1 120 ppm/V Output Rise Time tOR 0.8 to 2.0 V, CL=15 pF 1.5 ns Output Fall Time tOF 2.0 to 0.8 V, CL=15 pF 1.5 ns Output Clock Duty Cycle tD Measured at 1.4 V, CL=15 pF 60 % Maximum Output Jitter, short term tJ CL=15 pF 40 50 100 ps Note 1: External crystal device must conform with Pullable Crystal Specifications listed on page 3. Note 2: Original MK3711S and MK3711A provided ±100 ppm crystal pullability. Note 3: Original MK3711S and MK3711A provided 100 and 170 ppm/V respectively. IDT™ LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO 5 MK3711 REV K 051310 MK3711 LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO VCXO AND MULTIPLIER Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters Symbol 8 E Min A A1 B C D E e H h L α H INDEX AREA 1 2 D Inches Max 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.27 BASIC 5.80 6.20 0.25 0.50 0.40 1.27 0° 8° Min Max .0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .1890 .1968 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050 0° 8° *For reference only. Controlling dimensions in mm. A h x 45 A1 C -Ce B SEATING PLANE L .10 (.004) C Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature MK3711DMLF MK3711DMLFTR MK3711DMILF MK3711DMILFTR 3711DMLF 3711DMLF 3711DMIL 3711DMIL Tubes Tape and Reel Tubes Tape and Reel 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 0 to +70° C 0 to +70° C -40 to +85° C -40 to +85° C "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™ LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO 6 MK3711 REV K 051310 MK3711 LOW COST 8 TO 16 MHZ 3.3 VOLT VCXO VCXO AND MULTIPLIER Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales For Tech Support 800-345-7015 408-284-8200 Fax: 408-284-2775 www.idt.com/go/clockhelp 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. 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