MK2745-24S

DATASHEET MK2745-24 DVD/MPEG CLOCK SOURCE Description Features The MK2745-24 is a low-cost, low-jitter, high-performance clock synthesizer for DVD and other MPEG 2-based applications. Using analog Phase-Locked Loop (PLL) techniques, the device accepts a 27 MHz fundamental mode crystal or clock input to produce multiple audio output clocks, a processor clock, and two 27 MHz clocks. The audio clocks are frequency-locked to the 27 MHz using our patented zero ppm error techniques. This allows audio and video to track exactly, thereby eliminating the need for large buffer memory. • Packaged in a 16-pin narrow (150 mil) SOIC • Ideal for AuraVision’s notebook DVD solutions • Patented zero ppm audio clock error for exact audio clock sampling rates, plus 32x and 256x clocks of the sampling frequencies • Selectable audio sampling frequencies support 32, 44.1, and 96 kHz in most DACs • • • • • • • • IDT manufactures a large variety of DVD, Set-top Box, and multiimedia clock synthesizers for all applications. Consult IDT to eliminate crystals and oscillators from your board. 27 MHz fundamental crystal or clock input Selectable processor frequencies Two clocks of 27 MHz Zero ppm in all clocks 25 mA output drive capability at TTL levels Advanced, low-power, sub-micron CMOS process Operating voltage of 3.3 V to 5 V See also the MK2712 for NTSC/PAL clocks NOTE: EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 Block Diagram VDD 2 CLKA1 FBIN CLKA2 PLL CLKIN CLKA3 BANK A CLKA4 /2 CLKB1 CLKB2 S2, S1 2 Control Logic CLKB3 BANK B CLKB4 2 GND IDT™ DVD/MPEG CLOCK SOURCE 1 MK2745-24 REV E 122109 MK2745-24 DVD/MPEG CLOCK SOURCE VCXO AND SYNTHESIZER Pin Assignment Feedback Configuration Table CLKIN 1 16 FBIN CLKA1 2 15 CLKA4 CLKA2 3 14 CLKA3 VDD 4 13 VDD GND 5 12 GND CLKB1 6 11 CLKB4 CLKB2 7 10 CLKB3 S2 8 9 Feedback From Bank A Bank B CLKA1:A4 CLKIN 2XCLKIN CLKB1:B4 CLKIN/2 CLKIN S1 16-pin (150 mil) SOIC Output Clock Mode Select Table S2 0 0 1 1 S1 0 1 0 1 Clocks A1:A4 Tri-state (high impedance) Running Running Running Clocks B1:B4 Tri-state (high impedance) Tri-state (high impedance) Running Running Internet Generation None PLL Buffer only (no zero delay) PLL PLL Status On On Off On Pin Descriptions Pin Number Pin Name Pin Type 1 CLKIN Input 2, 3 CLKA1:A4 Output Clock A bank of four outputs. 4 VDD Power Power supply. Connect pin to same voltage as pin 13 (either 3.3 V or 5 V). 5 GND Power Connect to ground. 6, 7 CLKB1:B4 Output Clock B bank of four outputs. These are low skew divide by two of bank A. 8 S2 Input Select input 2. Selects mode for outputs per table above. 9 S1 Input Select input 1. Selects mode for outputs per table above. 10, 11 CLKB1:B4 Output Clock B bank of four outputs. These are low skew divide by two of bank A. 12 GND Power Connect to ground. 13 VDD Power Power supply. Connect pin to same voltage as pin 4 (either 3.3 V or 5 V). 14, 15 CLKA1:A4 Output Clock A bank of four outputs. 16 FBIN Input IDT™ DVD/MPEG CLOCK SOURCE Pin Description Clock input. Connect to input clock source. Feedback input. Determines outputs per table above. 2 MK2745-24 REV E 122109 MK2745-24 DVD/MPEG CLOCK SOURCE VCXO AND SYNTHESIZER External Components The MK2745-24 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.1µF should be connected between VDD and GND, as close to the part as possible. A 33Ω series terminating resistor should be used on each clock output to reduce reflections. Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK2745-24. 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 Junction Temperature 125° C Soldering Temperature 260° C Recommended Operation Conditions Parameter Min. Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) IDT™ DVD/MPEG CLOCK SOURCE 3 Typ. Max. Units 0 +70 °C +3.0 +5.5 V MK2745-24 REV E 122109 MK2745-24 DVD/MPEG CLOCK SOURCE VCXO AND SYNTHESIZER DC Electrical Characteristics VDD=3.3 V ±10%, Temp 0 to +70° / -40 to +85° C Parameter Symbol Conditions Operating Voltage VDD Input High Voltage VIH CLKIN pin only Input Low Voltage VIL CLKIN pin only Input High Voltage VIH Input Low Voltage VIL Output High Voltage VOH IOH = -18 mA Output Low Voltage VOL IOL = 18 mA Output High Voltage VOH IOH = -5 mA Operating Supply Current 100 MHz, CLKIN IDD No Load S1=S2=1 Short Circuit Current IOS Input Capacitance CIN Min. Typ. 3.0 (VDD/2)+1 Max. Units 5.5 V VDD/2 V VDD/2 (VDD/2)-1 V 2 V 0.8 V 2.4 V 0.4 V VDD-0.4 V 44 mA Each output ± 65 mA S1, S1, FBIN 7 pF AC Electrical Characteristics VDD = 3.3V ±10%, Temp 0 to +70° / -40 to +85° C Parameter Symbol Conditions Min. Typ. Max. Units Input Frequency FBIN to CLKA1 S1=S2=1 20 160 MHz Output Frequency FBIN to CLKA1 S1=S2=1 20 160 MHz Output Rise Time tOR 0.8 to 2.0 V, CL=30 pF 1.5 ns Output Fall Time tOF 0.8 to 2.0 V, CL=30 pF 1.5 ns 60 % Output Clock Duty Cycle at 1.4V Device-to-Device skew, equally loaded Rising edges at VDD/2 700 ps Output-to-Output skew, equally loaded Rising edges at VDD/2 200 ps Maximum Absolute Jitter Cycle-to-Cycle Jitter IDT™ DVD/MPEG CLOCK SOURCE 40 50 300 ps 30 pF loads 66.67 MHz outputs 400 ps 15 pF loads 66.67 MHz outputs 400 ps 4 MK2745-24 REV E 122109 MK2745-24 DVD/MPEG CLOCK SOURCE Parameter VCXO AND SYNTHESIZER Symbol Conditions Min. Typ. Max. Units Skew from Output Bank A to Output Bank B All outputs equally loaded 400 ps Delay CLKIN Rising Edge to FBIN Rising Edge Measured at VDD/2 ±250 ps 1 ms PLL Lock Time tLOCK Stable power supply, valid clocks on CLKIN, FBIN Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case IDT™ DVD/MPEG CLOCK SOURCE Symbol Conditions Min. Typ. Max. Units θJA Still air 120 ° C/W θJA 1 m/s air flow 115 ° C/W θJA 3 m/s air flow 105 ° C/W 58 ° C/W θJC 5 MK2745-24 REV E 122109 MK2745-24 DVD/MPEG CLOCK SOURCE VCXO AND SYNTHESIZER Package Outline and Package Dimensions (16-pin SOIC, 150 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 16 Millimeters Symbol E Min A A1 B C D E e H h L α H INDEX AREA 1 2 D A Inches Max Min 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 9.80 10.00 3.80 4.00 1.27 BASIC 5.80 6.20 0.25 0.50 0.40 1.27 0° 8° Max .0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .3859 .3937 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050 0° 8° h x 45 A1 C -Ce B SEATING PLANE L C .10 (.004) Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature MK2745-24S* 2745-24S Tubes 16-pin SOIC 0 to 70° C MK2745-24ST* 2745-24S Tape and Reel 16-pin SOIC 0 to 70° C MK2745-24SI* 2745-24SI Tubes 16-pin SOIC -40 to +85° C MK2745-24SIT* 2745-24SI Tape and Reel 16-pin SOIC -40 to +85° C MK2745-24SLF 2745-24SL Tubes 16-pin SOIC 0 to 70° C MK2745-24SLFT 2745-24SL Tape and Reel 16-pin SOIC 0 to 70° C MK2745-24SILF 2745-24SIL Tubes 16-pin SOIC -40 to +85° C MK2745-24SILFT 2745-24SIL Tape and Reel 16-pin SOIC -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™ DVD/MPEG CLOCK SOURCE 6 MK2745-24 REV E 122109 MK2745-24 DVD/MPEG CLOCK SOURCE 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