P2084A Low Cost Frequency Multiplier Features The P2084A can generate a 4x output clock of the input frequency which allows system cost savings by using an inexpensive crystal or resonator to achieve high frequency multiplication. • Generates 2x and 4x clocks of the input clock frequency • Input clock frequency range from 3MHz to 78MHz • P2084A: 312MHz output clock frequency • 3.3V operating voltage range The P2084A provides up to 312MHz output clock frequencies respectively through the use of the PhaseLock-Loop (PLL) technique which delivers low jitter and high precision synthesized clocks. • 10mA output drives Applications • External loop filter • Low Cycle-to-Cycle Jitter • TTL or CMOS compatible outputs The P2084A is targeted towards the high frequency CAN OSC replacement market. Applications include xDSL, routers, networking, PC peripherals, and embedded systems. • Ultra-low power CMOS design • Available in 8-pin SOIC Product Description P2084A is a versatile frequency multiplier that is designed specifically as cost effective alternatives to the high precision frequency oscillator. FS0 Block Diagram FS1 LF VDD PLL Modulation XIN / CLKIN XOUT Crystal Oscillator Frequency Divider Feedback Divider Phase Detector Output Divider VCO ModOUT VSS ©2010 SCILLC. All rights reserved. MARCH 2010 – Rev. 1 Publication Order Number: P2084/D P2084A Pin Configuration XIN / CLKIN 1 XOUT 2 P2084A 8 VDD 7 FS0 FS1 3 6 CLKOUT LF 4 5 VSS Pin Description Pin# Pin Name Type Description 1 XIN / CLKIN I Connect to crystal or clock input. 2 XOUT I Crystal connection. If using an external reference, this pin must be left unconnected. 3 FS1 I Digital logic input used to select input frequency range. (See Input Frequency Selection.) This pin has an internal pull-up resistor. 4 LF I External loop filter for the PLL. (See Loop Filter Selection Table for value.) 5 VSS P Ground connection. Connect to system ground. 6 CLKOUT O Clock output. 7 FS0 I Digital logic input used to select input frequency range. (See Input Frequency Selection.) This pin has an internal pull-up resistor. 8 VDD P Connect to +3.3V. Input Frequency Selection Output Frequency Scaling FS1 FS0 Input (MHz) P2084A 0 0 3 to 9 12 to 36 0 1 10 to 19 40 to 76 1 0 20 to 38 80 to 152 1 1 39 to 78 156 to 312 Rev. 1 | Page 2 of 7 | www.onsemi.com P2084A Loop Filter Selection Table VDD 3.3V Input (MHz) 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 - 22 23 - 24 25 - 26 27 - 28 29 - 30 31 - 32 33 - 34 35 - 36 37 - 38 39 - 42 43 - 46 47 - 50 51 - 54 55 - 58 59 - 62 63 - 66 67 - 70 71 - 74 75 - 78 FS1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 FS0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 C1(pF) 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 270 Rev. 1 | Page 3 of 7 | www.onsemi.com C2(pF) 330,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 R1 (ohms) 220 270 390 510 620 820 1,000 330 390 510 560 620 750 820 910 1,000 1,200 330 390 510 560 620 750 820 910 1,000 1,200 330 390 510 560 620 750 820 910 1,000 1,200 P2084A Output Clock Selection Example The P2084A can generate 4x from the input reference frequency. P2084A’s internal crystal oscillator circuits allow the use of an inexpensive crystal of resonator to replace expensive can oscillators that are used in networking, PC peripherals, xDSL, and consumer applications for high frequency generation. Its input frequency range is optimized for operation from 3MHz to 78MHz, and its output frequency can deliver up to 312MHz. VDD 1 XIN 2 XOUT 3 FS1 4 LF VDD 8 P2084A VDD CL 0Ω 0Ω CL VDD 0Ω FS0 7 CLKOUT 6 VSS 5 0Ω R1 C2 C1 Rev. 1 | Page 4 of 7 | www.onsemi.com P2084A Absolute Maximum Ratings Symbol Parameter Rating Unit V VDD Voltage on any pin with respect to Ground -0.5 to +4.6 TSTG Storage temperature -65 to +125 °C Ts Max. Soldering Temperature (10 sec) 260 °C TJ Junction Temperature 150 °C TDV Static Discharge Voltage (As per JEDEC STD22- A114-B) 2 KV Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability. Operating Conditions Parameter Min Max Unit Supply Voltage 3.0 3.6 V TA Operating Temperature (Ambient Temperature) -40 +85 °C CL Load Capacitance 15 pF CIN Input Capacitance 7 pF VDD Description DC Electrical Characteristics Symbol Parameter Min Max Unit GND-0.3 0.8 V 2.0 VDD+0.3 V VIL Input low voltage VIH IXOL Input high voltage Input low current (internal input pull-up resistor on FS0 and FS1) Input high current (internal input pull-up resistor on FS0 and FS1) XOUT output low current IXOH XOUT output high current VOL Output low voltage (VDD = 3.3V, IOL = 20mA) VOH Output high voltage (VDD = 3.3V, IOH = 20mA) IDD Static supply current ICC Typical dynamic supply current (25pF scope probe loading) 5.2 at 3MHz VDD Operating voltage Power-up time (CLOOP = 0.1µF at 16MHz, first locked cycle after power up) Clock output impedance (at 16MHz) 3.0 IIL IIH tON ZOUT AC Electrical Characteristics Symbol fIN 1 tLH tHL 1 Typ 60 µA 0 µA 10 mA 10 mA 0.4 2.5 V 3 Parameter Min V mA 3.3 21.2 at 82MHz 3.6 mA V 7 mS 28 Ω Typ Max Unit Input frequency 3 78 MHz P2084A 12 312 MHz Output rise time (measured at 0.8V to 2.0V) 1 ns Output fall time (measured at 2.0V to 0.8V) 1 ns ±200 ps tJC Jitter (cycle-to-cycle) tD Output duty cycle 45 Note: 1. tLH and tHL are measured into a capacitive load of 15 pF. Rev. 1 | Page 5 of 7 | www.onsemi.com 50 55 % P2084A 8-Pin SOIC H E D A2 A θ C D e A1 L B Dimensions Symbol Inches Millimeters Min Max Min Max A1 0.004 0.010 0.10 0.25 A 0.053 0.069 1.35 1.75 A2 0.049 0.059 1.25 1.50 B 0.012 0.020 0.31 0.51 C 0.007 0.010 0.18 0.25 D 0.193 BSC 4.90 BSC E 0.154 BSC 3.91 BSC e 0.050 BSC 1.27 BSC H 0.236 BSC 6.00 BSC L 0.016 0.050 θ 0° 8° 0.41 1.27 0° 8° Rev. 1 | Page 6 of 7 | www.onsemi.com P2084A Ordering Codes Part Number Marking Package Type P2084AF-08ST ABM 8-pin SOIC, tube, Pb Free P2084AF-08SR ABM 8-pin SOIC, tape & reel, Pb Free Qty per reel Temperature 0°C to +70°C 2500 0°C to +70°C A “microdot” placed at the end of last row of marking or just below the last row toward the center of package indicates Pb-free Licensed under US patent #5,488,627 and #5,631,920. Advance datasheet. Specification subject to change without notice. Note: This product utilizes US Patent #6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer's technical experts. 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