MK2772-01S

MK2772-01 VCXO and Set-Top Clock Source Description Features • Packaged in 20 pin SOIC (Pb free available) The MK2772-01 is a low cost, low jitter, high performance VCXO and clock synthesizer for set-top boxes. The on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3V input voltage to cause the output clocks to vary by ±100 ppm. Using ICS’ patented VCXO and analog Phase-Locked Loop (PLL) techniques, the device uses an inexpensive 13.5 MHz crystal input to produce multiple output clocks. All clocks are frequency locked to the 27.00MHz output (and to each other) with zero ppm error. The MK2772 includes a glitch-free multiplexer to switch input sources during operation. • Uses an inexpensive 13.5 MHz crystal • On-chip VCXO (patented) with pull range of 200ppm (minimum) • Ability to switch input sources “on-the-fly” • VCXO tuning voltage of 0 to 3V • Zero ppm synthesis error (patented) in all clocks. All exactly track 27MHz VCXO • All clocks are frequency locked. All will vary the same amount (in ppm) as the VCXO ICS manufactures the largest variety of Set-Top Box and multimedia clock synthesizers for all applications. Consult ICS to eliminate VCXOs, crystals and oscillators from your board. • Selectable Audio clock for 256x, 384x, and 512x. • 25mA output drive capability at TTL levels • Advanced, low power, sub-micron CMOS process • 5V operating voltage Block Diagram VDD 3 GND 3 2 ACS1:0 Clock Synthesis Circuitry INMUXSEL EXTCLKIN VIN 13.5 MHz pullable crystal Audio Clock Output Buffer 16.6667 MHz Output Buffer 11.0592 MHz Output Buffer 3.6864 MHz X1 Voltage Controlled Crystal Oscillator and x2 PLL X2 MDS 2772-01 D Output Buffer deglitched mux 1 Output Buffers 3 27.000 MHz Revision 102704 MK2772-01 VCXO and Set-Top Clock Source Pin Assignment Audio Clock Select ACS1 1 20 ACS0 X2 2 19 EXTCLKIN X1 3 18 27M VDD 4 17 GND VIN 5 16 27M VDD 6 15 VDD GND 7 14 GND 16.67M 8 13 27M 3.68M 9 12 11.06M ACLK 10 11 INMUXSEL ACS1 ACS0 ACLK (MHz) 0 0 8.192 0 M 16.384 0 1 11.2896 M 0 16.9344 M M 22.5792 M 1 18.432 1 0 12.288 1 M 24.576 1 1 5.6448 Input Source Select INMUXSEL 0 1 27 MHz Input EXTCLKIN Internal VCXO Pin Descriptions Number Name 1 ACS1 Type Description TI Audio Clock Select 1. Determines ACLK frequency, as per table above. 2 X2 X Crystal connection. Connect to a pullable 13.5 MHz crystal. 3 X1 X Crystal connection. Connect to a pullable 13.5 MHz crystal. 4 VDD P Connect to +5V, and other VDDs. 5 VIN VI Voltage Input to VCXO. Zero to 3V signal which controls the frequency of the VCXO. 6 VDD P Connect to +5V. 7 GND P Connect to ground. 8 16.67M O 16.6667 MHz processor clock output. 9 3.68M O 3.6864 MHz clock output. 10 ACLK O Audio Clock Output determined by ACS1,0. Per table above. 11 INMUXSEL I Input Multiplexer Select. Selects either the internal VCXO/PLL output, or the clock on pin 19. 12 11.06M O 11.0592 MHz clock output. 13 27M O 27.00 MHz clock output. 14 GND P Connect to ground. 15 VDD P Connect to +5V. 16 27M O 27.00 MHz clock output. 17 GND P Connect to ground. 18 27M O 27.00 MHz clock output. 19 EXTCLKIN I External Clock Input. Connect an external 27 MHz clock to this pin for glitch free switching. 20 ACS0 TI Audio Clock Select 0. Determines ACLK frequency, as per table above. Key: I = Input, TI = tri-level input, VI = VCXO input, O = output, P = power supply connection, X = crystal connection MDS 2772-01 D 2 Revision 102704 MK2772-01 VCXO and Set-Top Clock Source Electrical Specifications Parameter Conditions Minimum Typical Maximum Units ABSOLUTE MAXIMUM RATINGS (note 1) Supply voltage, VDD Referenced to GND 7 V Inputs and Clock Outputs Referenced to GND -0.5 VDD+0.5 V Ambient Operating Temperature 0 70 °C Soldering Temperature Max of 10 seconds 260 °C Storage temperature -65 150 °C DC CHARACTERISTICS (VDD = 5.0V unless noted) Operating Voltage, VDD 4.75 5.25 V Input High Voltage, VIH, X1 pin only 3.5 2.5 V Input Low Voltage, VIL, X1 pin only 2.5 1.5 V Input High Voltage, VIH ACS1, ACS0 VDD-0.5 V Input High Voltage, VIH INMUXSEL 2 V Input Low Voltage, VIL 0.8 V Output High Voltage, VOH IOH=-25mA 2.4 V Output Low Voltage, VOL IOL=25mA 0.4 V Output High Voltage, VOH, CMOS level IOH=-8mA VDD-0.4 V Operating Supply Current, IDD No Load, note 2 45 mA Pull-up Resistor value pin 11 only 250k Ω Input Capacitance 7 pF Frequency synthesis error All clocks as shown 0 1 ppm VIN, VCXO control voltage 0 3 V AC CHARACTERISTICS (VDD = 5.0V unless noted) Input Crystal Frequency 13.50000 MHz Input Crystal Accuracy ±30 ppm Output Clock Rise Time 0.8 to 2.0V 1.5 ns Output Clock Fall Time 2.0 to 0.8V 1.5 ns Output Clock Duty Cycle At 1.4V 40 60 % Maximum Absolute Jitter, short term 300 ps 27 MHz output pullability, note 3 0V < VIN < 3V' ±100 ppm Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability. 2. With ACLK at 12.288 MHz. 3. With a recommended crystal. External Components/Crystal Selection The MK2772-01 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.1µF should be connected between VDD (pin 15) and GND (14), and between VDD (4) and GND (7), as close to the MK2772-01 as possible. A series termination resistor of 33Ω may be used for each clock output. The input crystal must be connected as close to the chip as possible. For the VCXO to operate correctly, a crystal properly specified and matched to the MK2772-01 must be used. For more information, including a list of recommended crystals, refer to application note MAN05. MDS 2772-01 D 3 Revision 102704 MK2772-01 VCXO and Set-Top Clock Source Package Outline and Package Dimensions 20 pin SOIC Inches E Min Max Min Max A 0.092 0.104 2.3368 2.6416 b 0.014 0.019 0.356 0.483 c 0.009 0.012 0.229 0.305 D 0.490 0.512 12.446 13.005 E 0.290 0.300 7.366 7.620 H 0.394 0.419 10.008 10.643 H e .050 BSC h h x 45° Q D e 1.27 BSC 0.016 0.003 0.011 0.406 0.076 0.279 A c Q Millimeters Symbol b Ordering Information Part/Order Number Marking Shipping packaging Package Temperature MK2772-01S MK2772-01S tubes 20 pin SOIC 0-70°C MK2772-01STR MK2772-01S tape and reel 20 pin SOIC 0-70°C MK2772-01SLF MK2772-01SLF tubes 20 pin SOIC 0-70°C MK2772-01SLFTR MK2772-01SLF tape and reel 20 pin SOIC 0-70°C While the information presented herein has been checked for both accuracy and reliability, ICS Incorporated 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 ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments. MDS 2772-01 D 4 Revision 102704 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com IMPORTANT NOTICE AND DISCLAIMER RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (“RENESAS”) PROVIDES TECHNICAL SPECIFICATIONS AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. These resources are intended for developers skilled in the art designing with Renesas products. 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