ASM3P2111BG-08SR

Overview

The ASM3P2111BG-08SR is a spread spectrum clock generator designed to reduce electromagnetic interference (EMI) in high-speed digital systems. It accepts a 25 MHz input and generates multiple output frequencies, including unmodulated 60 MHz and dual 48 MHz clocks, alongside a modulated 66.6 MHz output with -1.7% down-spread at a 30 kHz modulation rate. Operating on a 3.3 V supply within the -40°C to +85°C temperature range, this CMOS device utilizes PLL-based frequency modulation to broaden signal bandwidth and lower harmonic peak amplitudes. It is housed in an 8-lead SOIC package.

Feature Summary

• Generates EMI-optimized clock signals via spread spectrum modulation
• Provides four distinct outputs: 60 MHz, two 48 MHz channels, and 66.6 MHz
• Features -1.7% down-spread modulation at a 30 kHz rate for the 66.6 MHz output
• Operates on a single 3.3 V ± 0.3 V power supply

Applications

• PC peripheral devices requiring EMI management
• Consumer electronics systems
• Embedded controller systems

Procurement Notes

Verify the specific ordering suffix 'G-08SR' against official documentation to confirm the tape and reel packaging configuration and the commercial temperature range of 0°C to +70°C. Ensure that the RoHS compliance status aligns with current regulatory requirements for the intended deployment region.

Selection Notes

Select this component when system design requires active EMI reduction through clock spreading without increasing PCB layer counts or shielding costs. The device supports a 25 MHz crystal input and provides fixed frequency outputs suitable for standard bus interfaces. Verify load capacitance requirements of 15 pF for the output drivers during circuit simulation.

Part Context

This part belongs to the ASM3P2111B family of peak EMI reducing solutions manufactured by ON Semiconductor. The series includes variants such as the ASM3P2111A and ASM3P2812AF, which share similar low-power EMI reduction functionalities but may differ in pin configurations or specific output frequency sets.

Replacement Considerations

Cross-reference with other members of the ASM3P2111 family or the ASM3P2812 series for functional compatibility. Confirm that alternative components support the required 25 MHz input and specific output frequencies before substitution.