MK2704SLF

DATASHEET MK2704 PLL AUDIO CLOCK SYNTHESIZER Description Features The MK2704 is a low cost, low jitter, high-performance PLL clock synthesizer designed to replace oscillators and PLL circuits in set-top box and multimedia systems. Using IDT’s patented analog Phase Locked Loop (PLL) techniques, the device uses a 27 MHz crystal or clock input to produce a buffered reference clock and a selectable audio clock. • • • • The audio clock is frequency locked to the 27 MHz clock, assuring that the audio with zero ppm error and video will track perfectly. • Supports MPEG sampling rates of 384x, 44.1 kHz, 48 Packaged in 8-pin SOIC Pb-free packaging Uses an inexpensive, fundamental crystal or clock Selectable audio output clock of 16.9344 MHz, 18.432 MHz, or 36.864 MHz kHz, and 96 kHz • • • • • IDT manufactures the largest variety of Set-Top Box and multimedia clock synthesizers for all applications. Consult IDT to eliminate VCXOs, crystals and oscillators from your board. Patented zero ppm synthesis error in all clocks All frequencies are frequency locked 25 mA output drive capability at TTL levels Advanced, low power, sub-micron CMOS process Operating voltage of 3.3 V or 5 V Block Diagram VDD PLL Clock Synthesis and Control Circuitry S1:0 2 CLK X1 27 MHz crystal or clock input Crystal Oscillator 27M X2 Capacitors are required for crystal tuning IDT™ PLL AUDIO CLOCK SYNTHESIZER GND 1 MK2704 REV E 051310 MK2704 PLL AUDIO CLOCK SYNTHESIZER CLOCK SYNTHESIZER Pin Assignment AUDIO CLOCK OUTPUT SELECT TABLE S1 S0 CLK (MHz) X1 1 8 X2 0 0 36.864 VDD 2 7 S0 0 1 Test GND 3 6 S1 1 0 16.9344 27M 4 5 CLK 1 1 18.432 Key: 0 = Connect pin directly to ground 8-pin (150 mil) SOIC 1 = Connect pin directly to VDD Pin Descriptions Pin Pin Number Name Pin Type Pin Description 1 X1 XI Crystal Connection. Connect to a 27 MHz fundamental crystal or clock. 2 VDD Power Connect to +3.3 V or +5 V. 3 GND Power Connect to ground. 4 27M Output 27.00 MHz buffered reference clock output. 5 CLK Output Audio clock output per table above. 6 S1 Input Audio clock frequency select input #1. Determines CLK output per table above. Internal pull-up resistor. 7 S0 Input Audio clock frequency select input #0. Determines CLK output per table above. Internal pull-up resistor. 8 X2 XO Crystal connection to a 27 MHz crystal, or leave unconnected for clock output. External Components Decoupling Capacitor Series Termination Resistor As with any high performance mixed-signal IC, the MK2704 must be isolated from system power supply noise to perform optimally. A 33Ω terminating resistor can be used next to the clock outputs for trace lengths over one inch. Crystal Load Capacitors A decoupling capacitor of 0.01µF must be connected between VDD and GND on pins 2 and 3. It must be connected close to the MK2704 to minimize lead inductance. No external power supply filtering is required for the MK2704. IDT™ PLL AUDIO CLOCK SYNTHESIZER The total on-chip capacitance is approximately 16 pF. A parallel resonant, fundamental mode, AT cut 27 MHz crystal should be used. The device crystal connections should include pads for small capacitors from X1 to ground and from X2 to ground. These capacitors are used to adjust the 2 MK2704 REV E 051310 MK2704 PLL AUDIO CLOCK SYNTHESIZER CLOCK SYNTHESIZER connected from each of the pins X1 and X2 to ground. stray capacitance of the board to match the nominally required crystal load capacitance. Because load capacitance can only be increased in this trimming process, it is important to keep stray capacitance to a minimum by using very short PCB traces (and no vias) between the crystal and device. Crystal capacitors, if needed, must be The value (in pF) of these crystal caps should equal (CL -16 pF)*2. In this equation, CL= crystal load capacitance in pF. Example: For a crystal with an 18 pF load capacitance, each crystal capacitor would be 4 pF [(18-16) x 2] = 4. Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK2704. 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 0 to +70° C Storage Temperature -65 to +150° C Soldering Temperature 260° C Recommended Operation Conditions Parameter Min. Max. Units 0 +70 °C +3.13 +5.50 V Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) Typ. DC Electrical Characteristics VDD=3.3 V ±5% , Ambient temperature 0 to +70° C, unless stated otherwise Parameter Symbol Conditions Operating Voltage VDD Input High Voltage VIH X1 pin only Note 1 Input Low Voltage VIL X1 pin only Note 1 Input High Voltage VIH S0, S1 pins Input Low Voltage VIL S0, S1 pins Output High Voltage VOH IOH = -12 mA Output Low Voltage VOL IOL = 12 mA IDT™ PLL AUDIO CLOCK SYNTHESIZER Min. Typ. 3.13 3 Max. Units 5.50 V (VDD/2)+1 VDD/2 V VDD/2 (VDD/2)-1 2.0 V V 0.8 2.4 V V 0.4 MK2704 V REV E 051310 MK2704 PLL AUDIO CLOCK SYNTHESIZER CLOCK SYNTHESIZER Parameter Symbol Output High Voltage, CMOS level VOH IOH = -4 mA Operating Supply Current IDD No load VDD = 3.3.V 10 mA No load VDD = 5 V 18 mA CLK output +50 mA S0, S1 pins 5 pF 20 Ω Short Circuit Current Input Capacitance CIN Conditions Min. Typ. VDD-0.4 Nominal Output Impedance Frequency Synthesis Error Max. Units V All Clocks 0 ppm Note 1: CMOS level input. Nominal trigger point is VDD/2 for 3.3 V or 5 V operation AC Electrical Characteristics VDD = 3.3 V ±5%, Ambient Temperature 0 to +70° C, unless stated otherwise Parameter Symbol Input Crystal or Clock Frequency Conditions Min. FIN Typ. Max. 27 Input Crystal Accuracy Units MHz ±30 ppm Output Clock Rise Time tOR 0.8 to 2.0 V, Note 1 1.5 ns Output Clock Fall Time tOF 2.0 to 8.0 V, Note 1 1.5 ns 55 % Output Clock Duty Cycle Maximum Absolute Jitter, short at VDD/2, Note 1 tja 45 ±225 Deviation from mean ps Note 1: Measured with 15 pF load. Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case IDT™ PLL AUDIO CLOCK SYNTHESIZER Symbol Conditions Min. Typ. Max. Units θJA Still air 150 ° C/W θJA 1 m/s air flow 140 ° C/W θJA 3 m/s air flow 120 ° C/W 40 ° C/W θJC 4 MK2704 REV E 051310 MK2704 PLL AUDIO CLOCK SYNTHESIZER CLOCK SYNTHESIZER Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters Inches 8 Symbol E A A1 B C D E e H h L α H INDEX AREA 1 2 D A Min 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° h x 45 A1 C -Ce B SEATING PLANE L .10 (.004) C Ordering Information Part / Order Number Marking Shipping packaging Package Temperature MK2704SLF MK2704SLFTR 2704SL 2704SL Tubes Tape and Reel 8-pin SOIC 8-pin SOIC 0 to +70° C 0 to +70° C 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™ PLL AUDIO CLOCK SYNTHESIZER 5 MK2704 REV E 051310 MK2704 PLL AUDIO CLOCK SYNTHESIZER CLOCK 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. 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