ASM3P2779AF-06OR

Overview

The ASM3P2779AF-06OR is a spread spectrum clock generator designed to reduce electromagnetic interference (EMI) by modulating the output frequency. It operates on a 2.5V or 3.3V supply with dynamic current consumption under 4mA. The device accepts an input frequency between 13MHz and 30MHz, generating a 1X low EMI spread spectrum clock with a typical frequency deviation of ±1% at 16MHz. Key electrical parameters include a cycle-to-cycle jitter of ±200ps and an output duty cycle of 45/55%. It integrates loop filter components and utilizes a proprietary all-digital modulation method compliant with FCC standards.

Feature Summary

• Generates EMI-optimized spread spectrum clock signals from inputs between 13MHz and 30MHz
• Integrated loop filter components eliminate external passive requirements
• Low power operation with dynamic supply current less than 4mA
• Available in a compact 6L-TSOP (TSOT-23) surface-mount package

Applications

• Portable MP3 players
• Digital still cameras
• Clock sources for EMI-sensitive digital systems

Procurement Notes

Verify the ordering suffix 'F' indicates the commercial temperature range (0°C to +70°C), whereas 'I' denotes the industrial range (-40°C to +85°C). Confirm the package type is 6L-TSOP and the delivery format is tape and reel. Ensure the specific variant matches the required thermal operating conditions for the target application environment.

Selection Notes

Select this component when system-level EMI reduction is required without adding external ferrite beads or shielding. The device supports both crystal oscillators and external reference clocks on the XIN/CLKIN pin. Designers must account for the modulation rate equation (FIN/640) and ensure the load capacitance is approximately 15pF to maintain specified rise and fall times.

Part Context

This part belongs to the ASM3P27xx series of peak EMI reducing solutions manufactured by onsemi. It serves as a direct replacement for previous generations of spread spectrum generators, offering improved integration through internal loop filters. The product line targets cost savings in PCB layer count and shielding materials for portable consumer electronics.

Replacement Considerations

The ASM3I2779AF-06OR is the industrial temperature grade equivalent. Verify that the 6L-TSOP footprint is compatible with existing board layouts if substituting from other manufacturers' TSOT-23 packages.