P2010A Low Frequency EMI Reduction IC Description The P2010A is a selectable spread spectrum frequency modulator designed specifically for PC peripheral and embedded controller markets. The P2010A reduces electromagnetic interference (EMI) at the clock source which provides system wide reduction of EMI of all clock dependent signals. The P2010A allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P2010A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all−digital method. The P2010A modulates the output of a single PLL in order to “spread” the bandwidth of a synthesized clock and, more importantly, decreases the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators. Lowering EMI by increasing a signal’s bandwidth is called ‘spread spectrum clock generation.’ Applications The P2010A is targeted towards the embedded controller market and PC peripheral markets including scanners, facsimile, MFP’s, printers, PDA, IA, and GPS devices. http://onsemi.com SOIC−8 S SUFFIX CASE 751BD TSSOP−8 T SUFFIX CASE 948AL PIN CONFIGURATION XIN / CLK XOUT FS0 1 VDD P2010A SR0 ModOUT SSON VSS (Top View) Features • FCC Approved Method of EMI Attenuation • Provides up to 20 dB of EMI Suppression • Generates a Low EMI Spread Spectrum Clock of the Input ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. Frequency • Optimized for 10 MHz to 35 MHz Input Frequency Range • Internal Loop Filter Minimizes External Components and Board • • • • • • • • • Space 4 Selectable Spread Ranges SSON Control Pin for Spread Spectrum Enable and Disable Options Low Cycle−to−Cycle Jitter Wide Operating Range (3 V to 5 V) 16 mA Output Drives TTL or CMOS Compatible Outputs Low Power CMOS Design Available in 8−pin SOIC and TSSOP Packages These are Pb−Free Devices © Semiconductor Components Industries, LLC, 2011 August, 2011 − Rev. 2 1 Publication Order Number: P2010A/D P2010A SR1 FS0 SSON VDD PLL Modulation XIN Crystal Oscillator Frequency Divider XOUT Feedback Divider Loop Filter Phase Detector Output Divider VCO ModOUT VSS Figure 1. Block Diagram Table 1. ABSOLUTE MAXIMUM RATINGS Symbol Rating Unit −0.5 to +7 V Storage temperature −65 to +125 °C TA Operating temperature −40 to +85 °C Ts Max. Soldering Temperature (10 sec) 260 °C TJ Junction Temperature 150 °C 2 KV VDD, VIN TSTG TDV Parameter Voltage on any pin with respect to Ground 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 2. DC ELECTRICAL CHARACTERISTICS Symbol Min Typ Max Unit VIL Input Low Voltage Parameter GND − 0.8 V VIH Input High Voltage 2.0 − VDD+0.3 V IIL Input Low Current (pull−up resistor on inputs SR0, FS0) − − −35 mA IIH Input High Current (pull−down resistor on input SSON) − − 35 mA IXOL XOUT Output Low Current (@ 0.4 V, VDD = 3.3 V) − 3 − mA IXOH XOUT Output High Current (@ 2.5 V, VDD = 3.3 V) − 3 − mA VOL Output Low Voltage (VDD = 3.3 V, IOL = 20 mA) − − 0.4 V VOH Output High Voltage (VDD = 3.3 V, IOH = 20 mA) 2.5 − − V IDD Static Supply Current − 0.6 − mA ICC Dynamic Supply Current (3.3 V and 15 pF loading) 4 6 8 mA 2.7 3.3 5.5 V Power Up Time (First locked clock cycle after power up) − 0.18 − mS Clock Output Impedance − 50 − W VDD tON ZOUT Operating Voltage http://onsemi.com 2 P2010A Table 3. AC ELECTRICAL CHARACTERISTICS Symbol Parameter Min Typ Max Unit Input Frequency 10 20 35 MHz tLH (Note 1) Output rise time (measured at 0.8 V to 2.0 V) 0.7 0.9 1.1 nS tHL (Note 1) Output fall time (measured at 2.0 V to 0.8 V) 0.6 0.8 1.0 nS fIN tJC Jitter (Cycle−to−cycle) − − 360 pS tD Output duty cycle 45 50 55 % 1. tLH and tHL are measured into a capacitive load of 15 pF. Table 4. PIN DESCRIPTION Pin# Pin Name Type 1 XIN / CLK I Connect to crystal or externally generated clock signal. Description 2 XOUT I Connect to crystal. No connect if externally generated clock signal is used. 3 FS0 I Digital logic input used to select Input Frequency Range (see Table 5). This pin has an internal pull−up resistor. 4 VSS P Ground Connection. Connect to system ground. 5 SSON I Digital logic input used to enable Spread Spectrum function (Active Low). Spread Spectrum function enable when low. This pin has an internal pull−low resistor. 6 ModOUT O Spread Spectrum Clock Output. 7 SR0 I Digital logic input used to select Spreading Range (see Table 5). This pin has an internal pull−up resistor. 8 VDD P Connect to +3.3 V or +5.0 V. Table 5. SPREAD RANGE SELECTION FS0 SR0 Spreading Range Input Frequency Modulation Rate 1 0 ±1.50% 10 MHz to 20 MHz (Fin/10)*20.83 KHz 1 1 ±2.50% 10 MHz to 20 MHz (Fin/10)*20.83 KHz 0 0 ±1.25% 20 MHz to 35 MHz (Fin/10)*20.83 KHz 0 1 ±2.00% 20 MHz to 35 MHz (Fin/10)*20.83 KHz http://onsemi.com 3 P2010A Spread Spectrum Selection Example of a Typical Printer or Scanner Application that Operates on a Clock Frequency of 16 MHz: Table 5 illustrates the possible spread spectrum options. The optimal setting should minimize system EMI to the fullest without affecting system performance. The spreading is described as a percentage deviation of the center frequency. (Note: The center frequency is the frequency of the external reference input on XIN / CLK, Pin 1). A spreading selection of FS0=1 and SR0=1 provides a percentage deviation of ±2.50%* (see Table 5) of Center Frequency. This results in the frequency on ModOUT being swept from 16.40 MHz to 15.60 MHz at a modulation rate of 33.33 KHz (see Table 5). This particular example (see Figure 2 below) given here is a common EMI reduction method for scanner, printer or embedded applications and has already been adopted by most of the leading manufacturers. NOTE: Spreading range selection varies from different system manufacturers and their designs. VDD 16 MHz Crystal Input 1 XIN / CLK VDD 8 2 XOUT SR0 7 3 FS0 ModOUT 6 4 VSS SSON 5 P2010A 0.1 mF Connected to CLK input pin of the system. Figure 2. P2010A Application Schematic for Flat−Bed Scanner http://onsemi.com 4 P2010A 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 P2010A PACKAGE DIMENSIONS SOIC 8, 150 mils CASE 751BD−01 ISSUE O E1 E SYMBOL MIN A 1.35 1.75 A1 0.10 0.25 b 0.33 0.51 c 0.19 0.25 D 4.80 5.00 E 5.80 6.20 E1 3.80 4.00 MAX 1.27 BSC e PIN # 1 IDENTIFICATION NOM h 0.25 0.50 L 0.40 1.27 θ 0º 8º TOP VIEW D h A1 θ A c e b L END VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. http://onsemi.com 6 P2010A Table 6. ORDERING INFORMATION Part Number Marking Package Type Temperature P2010AF−08ST P2010AF 8−Pin SOIC, Tube, Pb Free Commercial P2010AF−08SR P2010AF 8−Pin SOIC, Tape and Reel, Pb Free Commercial P2010AG−08ST P2010AG 8−Pin SOIC, Tube, Green Commercial P2010AG−08SR P2010AG 8−Pin SOIC, Tape and Reel, Green Commercial I2010AF−08ST I2010AF 8−Pin SOIC, Tube, Pb Free Industrial I2010AF−08SR I2010AF 8−Pin SOIC, Tape and Reel, Pb Free Industrial I2010AG−08ST I2010AG 8−Pin SOIC, Tube, Green Industrial I2010AG−08SR I2010AG 8−Pin SOIC, Tape and Reel, Green Industrial P2010AF−08TT P2010AF 8−Pin TSSOP, Tube, Pb Free Commercial P2010AF−08TR P2010AF 8−Pin TSSOP, Tape and Reel, Pb Free Commercial P2010AG−08TT P2010AG 8−Pin TSSOP, Tube, Green Commercial P2010AG−08TR P2010AG 8−Pin TSSOP, Tape and Reel, Green Commercial I2010AF−08TT I2010AF 8−Pin TSSOP, Tube, Pb Free Industrial I2010AF−08TR I2010AF 8−Pin TSSOP, Tape and Reel, Pb Free Industrial I2010AG−08TT I2010AG 8−Pin TSSOP, Tube, Green Industrial I2010AG−08TR I2010AG 8−Pin TSSOP, Tape and Reel, Green Industrial ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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