ASM3P2187A, ASM3P2187B Product Preview Spread Spectrum Clock Generator for Mobile Applications http://onsemi.com Description The ASM3P2187A/B is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2187A/B reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2187A/B allows significant system cost savings by reducing the number of circuit board layers, ferrite beads and shielding that are traditionally required to pass EMI regulations. ASM3P2187A device has an option of Spread ON/OFF and ASM3P2187B device has Powerdown option. Application The ASM3P2187A/B is targeted towards mobile phones, mobile audio players and PDAs. Features • • • • • • • • • • • Generates a 4X EMI Optimized Clock Signal at the Output Input Frequency: 12.5 MHz to 20 MHz Output Frequency: 50 MHz to 80 MHz SSON/PDB Option Selectable Centre Spread: ±0.5%, ±1.0% Low Power CMOS Design Supply Voltage: 3.3 V ± 0.3 V Industrial Temperature Range 8−pin TSSOP Package Drop−in Replacement for MB88155−412 Device These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice. © Semiconductor Components Industries, LLC, 2011 August, 2011 − Rev. P2 1 TSSOP−8 T SUFFIX CASE 948AL PIN CONFIGURATIONS CLKIN/XIN 1 VDD XOUT ModOUT SSON VSS REFOUT SEL ASM3P2187A (Top View) CLKIN/XIN 1 VDD ModOUT XOUT PDB VSS SEL REFOUT ASM3P2187B (Top View) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. Publication Order Number: ASM3P2187A/D ASM3P2187A, ASM3P2187B VDD SEL SSON/PDB PLL Modulation CLKIN / XIN Frequency Divider Crystal Oscillator XOUT Loop Filter Phase Detector Feedback Divider VCO Output Divider ModOUT REFOUT Figure 1. Block Diagram Table 1. PIN DESCRIPTION Pin# Pin Name Type Description 1 CLKIN / XIN I External reference Clock input or Crystal connection. 2 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. 3 SSON / PDB (Note 1) I Modulation enable pin/ Power down pin. Has an Internal pull up resistor. 4 SEL I Modulation rate setting pin Centre spread, SEL = “L”: Frequency Deviation ±0.5% Centre spread, SEL = “H”: Frequency Deviation ±1.0% Has an Internal pull up resistor. 5 REFOUT O Non−modulated clock output pin. The Frequency is same as input frequency. This pin becomes to “L” at power−down. 6 VSS P Ground Connection. Connect to system ground. 7 ModOUT O Modulated clock output pin This pin becomes to “L” at power−down. 8 VDD P Power Supply Voltage Pin. Connect to +3.3 V. 1. SSON Pin is available in ASM3P2187A Device and PDB Pin is available in ASM3P2187B Device. Table 2. MODULATION ENABLE SETTING Table 4. SPREAD RANGE SELECTION SSON Modulation SEL Deviation @ 15 MHz L No Modulation L ±0.50% H Modulation H ±1.00% Table 3. POWER DOWN STATUS PDB Status L Power Down Status H Operating Status http://onsemi.com 2 ASM3P2187A, ASM3P2187B Table 5. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Unit −0.5 to +4.6 V Input Voltage pin with respect to Ground VSS−0.5 to VDD+0.5 V VOUT Output Voltage pin with respect to Ground VSS−0.5 to VDD+0.5 V TSTG Storage temperature VDD Supply Voltage pin with respect to Ground VIN −55 to +125 °C Ts Max. Soldering Temperature (10 sec) 260 °C TJ Junction Temperature 150 °C 2 KV TDV Static Discharge Voltage (As per JEDEC STD22− A114−B) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 6. DC ELECTRICAL CHARACTERISTICS Symbol Parameter Min Typ Max Unit VIL Input low voltage VSS−0.3 0.8 V VIH Input high voltage 2.0 VDD+0.3 V IIL Input low current −50 mA IIH Input high current +50 mA VOL Output low voltage VSS 0.4 V 2.4 VDD V For ModOUT, IOL = 4 mA For REFOUT, IOL = 3 mA VOH Output high voltage For ModOUT, IOH = −4 mA For REFOUT, IOH = −3 mA ICC Dynamic supply current (Unloaded Outputs) 17 mA IDD Static supply current standby mode (CLKIN / XIN pulled LOW) 8 mA 3.3 3.6 V Power up time (first locked clock cycle after power up) 2 5 mS Clock output impedance 50 VDD Operating voltage tON ZOUT 3.3 W CIN Input Capacitance 7 pF CL Load Capacitance 15 pF Table 7. AC ELECTRICAL CHARACTERISTICS Symbol CLKIN / XIN Parameter Input Clock frequency CLKOUT Output Clock frequency MF Modulation Frequency REFOUT ModOUT Min Typ Max Unit 12.5 15 20 MHz 12.5 15 20 MHz 50 60 80 32.4 39 52 KHz tLH (Note 2) Output rise time ( Measured from 20% to 80% ) 2 2.5 nS tHL (Note 2) Output fall time ( Measured from 80% to 20% ) 1.5 2 nS pS tJC Cycle−to−Cycle Jitter ±250 ±325 tJp Period Jitter (REFOUT) ±150 ±200 tD Output duty cycle 50 55 45 2. tLH and tHL are measured with a capacitive load of 15 pF. http://onsemi.com 3 % ASM3P2187A, ASM3P2187B ta tb VDD/2 ModOUT, REFOUT Figure 2. Output Clock Duty Cycle tD = (tb / ta) ModOUT tn + 1 tn NOTE: Cycle−cycle jitter indicates the difference between a certain cycle and the immediately succeeding (or preceding) cycle. Figure 3. Cycle−to−Cycle Jitter (tJC = [tn − tn + 1]) R1 = 510 W C1 = 27 pF C2 = 27 pF Figure 4. Typical Crystal Oscillator Circuit Table 8. TYPICAL CRYSTAL SPECIFICATIONS Fundamental AT Cut Parallel Resonant Crystal Nominal frequency 14.31818 MHz Frequency tolerance ±50 ppm or better at 25°C Operating temperature range −25°C to +85°C Storage temperature −40°C to +85°C Load capacitance 18 pF Shunt capacitance 7 pF maximum ESR 25 W http://onsemi.com 4 ASM3P2187A, ASM3P2187B PACKAGE DIMENSIONS TSSOP8, 4.4x3 CASE 948AL−01 ISSUE O b SYMBOL MIN NOM A E1 E MAX 1.20 A1 0.05 A2 0.80 b 0.19 0.30 c 0.09 0.20 D 2.90 3.00 3.10 E 6.30 6.40 6.50 E1 4.30 4.40 4.50 0.15 0.90 e 0.65 BSC L 1.00 REF L1 0.50 θ 0º 0.60 1.05 0.75 8º e TOP VIEW D A2 c q1 A A1 L1 SIDE VIEW L END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-153. http://onsemi.com 5 ASM3P2187A, ASM3P2187B Table 9. ORDERING INFORMATION Part Number Marking Package Type Temperature ASM3P2187AG−08TT 3P2187AG 8−Pin TSSOP, TUBE, Green Commercial ASM3P2187AG−08TR 3P2187AG 8−Pin TSSOP, TAPE & REEL, Green Commercial ASM3I2187AG−08TT 3I2187AG 8−Pin TSSOP, TUBE, Green Industrial ASM3I2187AG−08TR 3I2187AG 8−Pin TSSOP, TAPE & REEL, Green ASM3P2187BG−08TT 3P2187BG 8−Pin TSSOP, TUBE, Green Commercial Industrial ASM3P2187BG−08TR 3P2187BG 8−Pin TSSOP, TAPE & REEL, Green Commercial ASM3I2187BG−08TT 3I2187BG 8−Pin TSSOP, TUBE, Green Industrial ASM3I2187BG−08TR 3I2187BG 8−Pin TSSOP, TAPE & REEL, Green Industrial 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. SCILLC does not convey any license under its patent rights nor the rights of others. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 6 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative ASM3P2187A/D