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ASM3P2879AG-08ST Datasheet(PDF) 1 Page - ON Semiconductor |
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ASM3P2879AG-08ST Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 10 page © Semiconductor Components Industries, LLC, 2011 August, 2011 − Rev. 3 1 Publication Order Number: ASM3P2879A/D ASM3P2879A Low Power Peak Reducing EMI Solution Description The ASM3P2879A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2879A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2879A 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. The ASM3P2879A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The ASM3P2879A 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 ASM3P2879A is targeted towards all portable devices with very low power requirements like MP3 players, Notebooks and digital still cameras. Features • Generates an EMI Optimized Clock Signal at the Output • Integrated Loop Filter Components • Operates with a 3.3 V / 2.5 V Supply • Operating Current less than 4 mA • Low Power CMOS Design • Input Frequency Range: 13 MHz to 30 MHz for 2.5 V 13 MHz to 30 MHz for 3.3 V • Generates a 1X Low EMI Spread Spectrum Clock of the Input Frequency • Frequency Deviation: ±1% @ 24 MHz • Available in 6−pin TSOT−23, 8−pin SOIC and 8−pin TSSOP Packages • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant http://onsemi.com TSOT−6 O SUFFIX CASE 419AF PIN CONFIGURATIONS 6−Pin TSOT−23 Package (Top View) See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet. ORDERING INFORMATION VSS ModOUT VDD XOUT REFOUT 1 XIN / CLKIN VDD = 2.5 V / 3.3 V Supply Voltages 200 pS (Max) Cycle−to−Cycle Jitter 45/55% Output Duty Cycle FIN/640 Modulation Rate Equation ±1% @ 24 MHz Frequency Deviation Specification KEY SPECIFICATIONS SOIC−8 S SUFFIX CASE 751BD TSSOP−8 T SUFFIX CASE 948AL 8−Pin SOIC and TSSOP Packages (Top View) 1 VSS ModOUT VDD XOUT REFOUT XIN / CLKIN NC NC Description |
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