ASM3P2182A Product Preview LCD Panel EMI Reduction IC Description The ASM3P2182A is a versatile spread spectrum frequency modulator designed specifically for a wide range of input clock frequencies from 25 MHz to 210 MHz. (Refer to Input Frequency and Modulation Rate Table). The ASM3P2182A can generate an EMI reduced clock from an OSC or a system generated clock. The ASM3P2182A offers a Center Spread clock and with a percentage deviation from ± 0.13% or ± 1.24%. The ASM3P2182A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The ASM3P2182A allows significant system cost savings by reducing the number of circuit board layers ferrite beads, shielding and other passive components that are traditionally required to pass EMI regulations. The ASM3P2182A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. The ASM3P2182A 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.’ http://onsemi.com SOIC−8 S SUFFIX CASE 751BD PIN CONFIGURATION CLKIN 1 FS1 GND FS0 S1 VDD S0 ModOUT (Top View) Applications The ASM3P2182A is targeted towards EMI management for memory and LVDS interfaces in mobile graphic chipsets and high−speed digital applications such as PC peripheral devices, consumer electronics, and embedded controller systems. TSSOP−8 T SUFFIX CASE 948AL ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. Features • • • • • • • • • • • • • • • FCC Approved Method of EMI Attenuation Provides up to 15 dB EMI Reduction Generates a 1X Low EMI Spread Spectrum Clock of the Input Frequency Input Frequency Range: 25 MHz to 210 MHz Internal Loop Filter Minimizes External Components and Board Space Center Spread 4 Spread Frequency Deviation Selections: ± 0.13% to ± 1.24% Low Inherent Cycle−to−Cycle Jitter 3.3 V Operating Voltage TTL or CMOS Compatible Inputs and Outputs Low Power CMOS Design Supports Notebook VGA and Other LCD Timing Controller Applications Products are Available for Industrial Temperature Range Available in 8−pin SOIC and TSSOP Packages These are Pb−Free Devices 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. P3 1 Publication Order Number: ASM3P2182A/D ASM3P2182A VDD S0 FS0 FS1 PLL Modulation CLKIN Crystal Oscillator Frequency Divider Loop Filter Phase Detector Feedback Divider Output Divider VCO ModOUT VSS Figure 1. Block Diagram Table 1. PIN DESCRIPTION Pin # Pin Name Type Description 1 CLKIN I Connect to externally generated clock signal. 2 GND P Ground to entire chip. 3 S1 I Spread range select. Digital logic input used to select frequency deviation (Refer to Spread Deviation Table). This pin has an internal pull−up resistor. 4 S0 I Spread range select. Digital logic input used to select frequency deviation (Refer to Spread Deviation Table). This pin has an internal pull−up resistor. 5 ModOUT O Spread spectrum low EMI output. 6 VDD P Power supply for the entire chip (3.3 V). 7 FS0 I Frequency range select. Digital logic input used to select frequency range (Refer to Input Frequency and Modulation Rate Table). This pin has an internal pull−up resistor. 8 FS1 I Frequency range select. Digital logic input used to select frequency range (Refer to Input Frequency and Modulation Rate Table). This pin has an internal pull−up resistor. Table 2. INPUT FREQUENCY AND MODULATION RATE TABLE FS1 (pin 8) FS0 (pin 7) Frequency Range 0 0 25 MHz to 50 MHz 0 1 50 MHz to 103 MHz 1 0 75 MHz to 150 MHz 1 1 160 MHz to 210 MHz Table 3. SPREAD DEVIATION SELECTION TABLE Spreading Range (+%) S1 S0 25 MHz 40 MHz 65 MHz 81 MHz (Note 1) 81 MHz (Note 2) 108 MHz 120 MHz 162 MHz 200 MHz 0 0 0.28 0.19 0.15 0.12 0.18 0.15 0.1 0.1 0.06 0 1 0.8 0.3 0.3 0.2 0.5 0.3 0.19 0.3 0.1 1 0 1.2 0.54 0.45 0.4 0.8 0.6 0.36 1.0 0.6 1 1 2.1 1.0 1.1 0.9 1.4 1.1 0.75 1.9 1.2 1. Frequency Range: 50 MHz to 103 MHz 2. Frequency Range: 75 MHz to 150 MHz http://onsemi.com 2 ASM3P2182A Table 4. ABSOLUTE MAXIMUM RATINGS Symbol 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 VIN Parameter Supply Voltage pin with respect to Ground −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 5. RECOMMENDED OPERATING CONDITIONS Parameter VDD Description Operating Voltage TA Operating Temperature (Ambient Temperature) CL Load Capacitance CIN Input Capacitance Min Typ 2.7 3.3 0 Max Unit 3.7 V +70 °C 15 pF 5 pF Table 6. DC ELECTRICAL CHARACTERISTICS Symbol Parameter Min Typ Max Unit V VIL Input low voltage GND – 0.3 0.8 VIH Input high voltage 2.0 VDD + 0.3 V IIL Input low current −35 mA IIH Input high current 35 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 ICC Dynamic supply current Normal mode (3.3 V and 10 pF loading) 8.46 IDD Static supply current Standby mode (Note 3) VDD Operating voltage tON Power up time (first locked clock cycle after power up) ZOUT V 12 17.78 0.6 2.7 Clock out impedance 3.3 mA mA 3.7 V 0.18 mS 50 W 3. CLKIN pin is pulled low. Table 7. AC ELECTRICAL CHARACTERISTICS Symbol CLKIN Parameter Min Typ Max Unit Input frequency 25 210 MHz Output frequency 25 210 MHz tLH (Note 4) Output rise time (measured at 0.8 V to 2.0 V) 1.2 1.32 1.4 nS tHL (Note 4) Output fall time (measured at 2.0 V to 0.8 V) 0.8 0.9 1.0 nS 360 pS 45 50 55 % ModOUT tJC Jitter (cycle to cycle) TD Output duty cycle 4. tLH and tHL are measured into a capacitive load of 15 pF. http://onsemi.com 3 ASM3P2182A 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 4 ASM3P2182A 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 5 ASM3P2182A Table 8. ORDERING INFORMATION Part Number Marking Package Type Temperature ASM3P2182AF−08TT 3P2182AF 8−Pin TSSOP, TUBE, Pb Free Commercial ASM3P2182AF−08TR 3P2182AF 8−Pin TSSOP, TAPE & REEL, Pb Free Commercial ASM3P2182AF−08ST 3P2182AF 8−Pin SOIC, TUBE, Pb Free Commercial ASM3P2182AF−08SR 3P2182AF 8−Pin SOIC, TAPE & REEL, Pb Free Commercial ASM3P2182A−08TT 3P2182A 8−Pin TSSOP, TUBE Commercial ASM3P2182A−08TR 3P2182A 8−Pin TSSOP, TAPE & REEL Commercial ASM3P2182A−08ST 3P2182A 8−Pin SOIC, TUBE Commercial ASM3P2182A−08SR 3P2182A 8−Pin SOIC, TAPE & REEL Commercial ASM3P2182AG−08TT 3P2182AG 8−Pin TSSOP, TUBE, Green Commercial ASM3P2182AG−08TR 3P2182AG 8−Pin TSSOP, TAPE & REEL, Green Commercial ASM3P2182AG−08ST 3P2182AG 8−Pin SOIC, TUBE, Green Commercial ASM3P2182AG−08SR 3P2182AG 8−Pin SOIC, TAPE & REEL, Green Commercial ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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