MK2732-06G

DATASHEET MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER Description Features The MK2732-06 is a low-cost, low-jitter, high-performance VCXO and PLL clock synthesizer designed to replace expensive discrete VCXOs and multipliers. The on-chip Voltage Controlled Crystal Oscillator (VCXO) accepts a 0 to 3 V input voltage to cause the output clocks to vary by ±100 ppm. Using IDT’s patented VCXO and analog Phase-Locked Loop (PLL) techniques, the device uses an inexpensive 10 MHz to 14 MHz pullable crystal input to produce up to three output clocks. • • • • • • • IDT manufactures the largest variety of clocks for Set-top boxes and Communications. Consult IDT to eliminate VCXOs, crystals, oscillators andbuffers from your board. • VCXO tuning voltage of 0 to 3 V • Zero ppm synthesis error in all clocks • Full CMOS output swings with 25 mA output drive Packaged in 16-pin TSSOP Available in Pb (lead) free package For xDSL chipsets For MPEG2 decoders Replaces VCXO and multiplier Uses an inexpensive pullable crystal On-chip patented VCXO with pull range of 200 ppm (±100 ppm) minimum capability at TTL levels • Advanced, low-power, sub-micron CMOS process • 5 V operating voltage for core, ability to run output clocks at 3.3 V or 5 V for easy interface. • Available in commercial and industrial temperature versions NOTE: EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 Block Diagram VDD5 2 S1, S0 PLL/Clock Synthesis Circuitry VIN 10 - 14 MHz X1 pullable crystal X2 VDDIO CLK1 CLK2 Voltage Controlled Crystal Oscillator REFCLK OE (all outputs) IDT™ LOW PHASE NOISE VCXO AND MULTIPLIER 1 MK2732-06 REV G 122109 MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER VCXO AND SYNTHESIZER Pin Assignment X1 Clock Select Table 1 16 X2 2 15 REFCLK VDD5 3 14 NC VIN 4 13 GND GND 5 12 CLK2 GND 6 11 VDDIO S1 7 10 S0 OE 8 9 VDD5 CLK1 16-pin (173 mil) TSSOP S1 S0 Input CLK1 CLK2 REFCLK 0 0 0 M M M 1 1 1 0 M 1 0 M 1 0 M 1 13.248 13.248 13.248 13.248 13.5 13.5 13.5 Test mode 13.5 52.992 13.248 13.248 52.992 54 54 27 — 27 35.238 35.238 35.238 35.238 27 27 54 — 27 OFF OFF ON ON OFF ON ON — ON 0 = connect directly to ground M=leave unconnected (floating) 1 = connect directly to VDDIO off=output stopped low Pin Descriptions Pin Number Pin Name Pin Type Pin Description 1 2,3 X1 VDD5 XI Power 4 VIN VI 5, 6, 13 GND Power 7 S1 TI 8 OE Input 9 CLK1 Output 10 S0 TI 11 VDDIO Power Input and output VDD. Connect to 3.3. V or 5 V. Clock amplitude matches this voltage. 12 CLK2 Output Clock output #2 per table above. Amplitude = VDDIO. 14 NC — 15 REFCLK Output 16 X2 XO Crystal connection. Connect to a pullable crystal of 10 to 14.318 MHz. Core VDD. Connect to +5 V. Voltage input to VCXO. Zero to 3 V signal which controls the frequency of the VCXO. Connect to ground. Select input #1. Selects the outputs per table above. Do not exceed VDDIO. Output Enable. Tri-states outputs when low. Do not exceed VDDIO. Clock output #1 per table above. Amplitude = VDDIO. Select input #0. Selects the outputs per table above. Do not exceed VDDIO. Nothing connected internally to this pin. Buffered crystal VCXO clock. Crystal connection. Connect to a pullable crystal of 10 to 14 MHz. Key: TI = tri-level input; VI = analog voltage input; XI, XO = crystal pins IDT™ LOW PHASE NOISE VCXO AND MULTIPLIER 2 MK2732-06 REV G 122109 MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER VCXO AND SYNTHESIZER External Component Selection PCB is optional. 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. The MK2732-06 requires a minimum number of external components for proper operation. Decoupling Capacitor A decoupling capacitor of 0.01 µF and 0.1 µF must be connected between VDD5 and GND on pins 2, 3 and 5, 6, and VDDIO and GND on pins 11 and 13, as close to the device 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. To determine the need for and value of the crystal adjustment capacitors, you will need a PC board of your final layout, a frequency counter capable of about 1 ppm resolution and accuracy, two power supplies, and some samples of the crystals which you plan to use in production, along with measured initial accuracy for each crystal at the specified crystal load capacitance, CL. Series Termination Resistor To determine the value of the crystal capacitors: 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 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. 1. Connect VDD of the MK2732-06 to 3.3 V. Connect pin 3 of the MK2732-06 to the second power supply. Adjust the voltage on pin 3 to 0V. Measure and record the frequency of the CLK output. 2. Adjust the voltage on pin 3 to 3.3 V. Measure and record the frequency of the same output. Quartz Crystal To calculate the centering error: The MK2732-06 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 (as described in application note MAN05) must be used, and the layout guidelines discussed in the following section must be followed. 6 ( f 3.0V – f t arg et ) + ( f 0V – f t arg et ) Error = 10 x ------------------------------------------------------------------------------ – error xtal f t arg et The frequency of oscillation of a quartz crystal is determined by its “cut” and by the load capacitors connected to it. The MK2732-06 incorporates on-chip variable load capacitors that “pull” (change) the frequency of the crystal. The crystal specified for use with the MK2732-06 is designed to have zero frequency error when the total of on-chip + stray capacitance is 14 pF. Where: ftarget = nominal crystal frequency errorxtal =actual initial accuracy (in ppm) of the crystal being measured The external crystal must be connected as close to the chip as possible and should be on the same side of the PCB as theMK2732-06. 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. If the centering error is less than ±25 ppm, no adjustment is needed. If the centering error is more than 25 ppm negative, the PC board has excessive stray capacitance and a new PCB layout should be considered to reduce stray capacitance. (Alternately, the crystal may be re-specified to a higher load capacitance. Contact IDT for details.) If the centering error is more than 25 ppm positive, add identical 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. Stuffing of these capacitors on the IDT™ LOW PHASE NOISE VCXO AND MULTIPLIER 3 MK2732-06 REV G 122109 MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER VCXO AND SYNTHESIZER Trim sensitivity is a parameter which can be supplied by your crystal vendor. If you do not know the value, assume it is 30 ppm/pF. After any changes, repeat the measurement to verify that the remaining error is acceptably low (typically less than ±25 ppm). fixed centering capacitors from each crystal pin to ground. The value for each of these caps (in pF) is given by: External Capacitor = 2 x (centering error)/(trim sensitivity) Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK2732-06. 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 version 0 to +70 ° C Ambient Operating Temperature, Industrial version -40 to +85 ° C Storage Temperature -65 to +150 ° C Junction Temperature 125 ° C Soldering Temperature 260 ° C Recommended Operation Conditions Parameter Min. Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) Reference crystal parameters IDT™ LOW PHASE NOISE VCXO AND MULTIPLIER Typ. Max. Units 0 +70 °C +4.75 +5.25 V Refer to MAN05 4 MK2732-06 REV G 122109 MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER VCXO AND SYNTHESIZER DC Electrical Characteristics Unless noted otherwise, VDD5=5.0 V, VDDIO=3.3 V, Ambient temperature 0 to +70° C Parameter Symbol Conditions Min. Typ. Max. Units Core Operating Voltage VDD5 4.75 5.0 5.25 V Operating Voltage VDDIO 3.13 3.3 5.25 V Operating Supply Current IDD No load 11 mA Operating Supply Current IDDIO No load 5 mA 2.5 V Input High Voltage VIH X1 pin only Input Low Voltage VIL X1 pin only Input High Voltage VIH Binary input, OE Input Low Voltage VIL Binary input, OE Input High Voltage VIH Trinary inputs, S1, S0 Input Low Voltage VIL Trinary inputs, S1, S0 Output High Voltage VOH IOH = -25 mA Output Low Voltage VOL IOL = 25 mA Output High Voltage VOH CMOS Level, IOH = -8 mA Short Circuit Current Input Capacitance Frequency Synthesis Error CIN 2.5 1.5 2 V V 0.8 VDD-0.5 V V 0.5 2.4 V V 0.4 VDD-0.4 V V Each output ±50 mA S1, S0, OE 7 pF All clocks VIN, VCXO Control Voltage IDT™ LOW PHASE NOISE VCXO AND MULTIPLIER 3.5 0 5 0 ppm 3 V MK2732-06 REV G 122109 MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER VCXO AND SYNTHESIZER AC Electrical Characteristics Unless noted otherwise, VDD5=5.0 V, VDDIO=3.3 V, Ambient Temperature 0 to +70° C Parameter Symbol Conditions Min. Typ. Units 14 MHz Crystal Input Frequency FIN Output Rise Time tOR 0.8 V to 2.0 V 1.5 ns Output Fall Time tOF 2.0 V to 0.8 V 1.5 ns 60 % Output Clock Duty Cycle 10 Max. At VDDIO/2 40 Maximum Absolute Jitter, short term Phase Noise, relative to carrier 10 kHz offset Output Pullability 0V < VIN < 3 V IDT™ LOW PHASE NOISE VCXO AND MULTIPLIER 6 ±100 ±150 ps -115 dBc/Hz ppm MK2732-06 REV G 122109 MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER VCXO AND SYNTHESIZER Package Outline and Package Dimensions (16-pin TSSOP, 173 Mil. Body) Package dimensions are kept current with JEDEC Publication No. 95 16 Millimeters Symbol E1 A A1 A2 b C D E E1 e L α aaa E INDEX AREA 1 2 D A A2 Min Inches Max -1.20 0.05 0.15 0.80 1.05 0.19 0.30 0.09 0.20 4.90 5.1 6.40 BASIC 4.30 4.50 0.65 Basic 0.45 0.75 0° 8° -0.10 Min Max -0.047 0.002 0.006 0.032 0.041 0.007 0.012 0.0035 0.008 0.193 0.201 0.252 BASIC 0.169 0.177 0.0256 Basic 0.018 0.030 0° 8° -0.004 A1 c -Ce b SEATING PLANE L aaa C Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature MK2732-06G* MK27326 Tubes 16-pin TSSOP 0 to 70° C Tape and Reel 16-pin TSSOP 0 to 70° C MK2732-06GTR* MK2732-06GI* MK27326I MK2732-06GITR* MK2732-06GLF 27326LF MK2732-06GLFTR MK2732-06GILF 27326ILF MK2732-06GILFTR Tubes 16-pin TSSOP -40 to 85° C Tape and Reel 16-pin TSSOP -40 to 85° C Tubes 16-pin TSSOP 0 to 70° C Tape and Reel 16-pin TSSOP 0 to 70° C Tubes 16-pin TSSOP -40 to 85° C Tape and Reel 16-pin TSSOP -40 to 85° C *NOTE: EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 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 PHASE NOISE VCXO AND MULTIPLIER 7 MK2732-06 REV G 122109 MK2732-06 LOW PHASE NOISE VCXO AND MULTIPLIER VCXO AND SYNTHESIZER 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. Printed in USA