ASM3P2872AF-06OR

Overview

The ASM3P2872AF-06OR is a spread spectrum frequency modulator designed to reduce electromagnetic interference (EMI) at clock sources. It generates an EMI-optimized clock signal with integrated loop filter components, operating on a 3.3V or 2.5V supply with current consumption under 6mA. The device accepts input frequencies between 13MHz and 30MHz and produces a 1X low EMI spread spectrum clock output. Key electrical parameters include a frequency deviation of -1.25% at 22MHz, cycle-to-cycle jitter of ±200pS, and an output duty cycle of 45/55%. It utilizes a CMOS design and is available in a 6L-TSOP package.

Feature Summary

• Generates a 1X low EMI spread spectrum clock from input frequencies ranging from 13MHz to 30MHz.
• Integrated loop filter components eliminate external filtering requirements.
• Operates with 2.5V or 3.3V supplies while maintaining operating current below 6mA.
• Frequency deviation is specified as -1.25% at 22MHz input.

Applications

• Portable MP3 players
• Notebook computers
• Digital still cameras

Procurement Notes

Verify the ordering suffix 'F-06OR' corresponds to the 6L-TSOP tape and reel packaging configuration. Confirm that the component meets Pb-free standards as indicated by the marking microdot. Ensure the ambient operating temperature range of 0°C to +70°C aligns with the target system environment requirements before procurement.

Selection Notes

Select this component when system EMI reduction is required without adding external ferrite beads or shielding layers. Verify that the input clock frequency falls within the 13MHz to 30MHz range for both 2.5V and 3.3V operation. Consider the 6L-TSOP package dimensions if board space is constrained. Validate the modulation rate equation (FIN/640) against specific system timing needs.

Part Context

This part belongs to the ASM3P2872A series of peak EMI reducing solutions manufactured by ON Semiconductor. It functions as a versatile spread spectrum frequency modulator utilizing a proprietary all-digital method to modulate a single PLL. The device spreads the bandwidth of synthesized clocks to decrease harmonic peak amplitudes, thereby lowering overall system EMI compared to narrow-band oscillator signals.

Replacement Considerations

Datasheets list similar parts such as ASM3P2769A, ASM3P2870A, and ASM3P2775A. These alternatives share the same functional description regarding low power peak EMI reduction. Verify pin compatibility and specific modulation profiles when considering these substitutes.