DSC400-1111Q0142KI1

Clock Generators, PLLs, Frequency Synthesizers Overview

The DSC400-1111Q0142KI1 is a four-output crystal-less clock generator utilizing PureSilicon MEMS technology. It operates within a supply voltage range of 2.25V to 3.6V and supports frequencies from 2.3 MHz to 460 MHz for differential outputs, or up to 170 MHz for LVCMOS. The device features ±50 ppm stability and low RMS phase jitter typically under 1 ps. Outputs are configurable as LVPECL, LVDS, HCSL, or LVCMOS. It includes two independent banks with separate power supplies (VDD1, VDD2) and frequency select inputs (FSB1, FSB2). Operating temperature ranges from -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Crystal-less operation using integrated MEMS resonator eliminates external quartz components.
• Four format-configurable outputs support LVPECL, LVDS, HCSL, and LVCMOS standards.
• Dual independent output banks allow optimized noise isolation via separate power domains.
• Hardware pin-selectable frequency tables enable selection between two pre-configured sets per bank.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Ethernet interfaces including 1G, 10GBASE-T/KR/LR/SR, and FCoE
• Storage Area Networks such as SATA, SAS, and Fibre Channel
• Passive Optical Networks including EPON, GPON, and 10G-PON
• HD/SD/SDI video and surveillance systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific Q-code assignment for the required frequency configuration before ordering. Confirm that the 'I' suffix matches the industrial temperature requirement (-40°C to +85°C). Ensure the 'T' suffix is selected if tape and reel packaging is needed rather than tube. Cross-reference the part number against the latest Microchip datasheet revision to confirm current manufacturing status.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low jitter and high shock immunity are critical compared to traditional quartz oscillators. Verify that the required output formats (LVDS, LVPECL, etc.) align with the destination logic levels. Check if the dual-bank architecture fits the board layout constraints for separate VDD filtering capacitors. Ensure the operating frequency falls within the specified limits for the chosen output type.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This model belongs to the DSC400 family of configurable clock generators. It replaces discrete crystal oscillator solutions by integrating the resonator and PLL on-chip. The '1111' code indicates all four outputs are configured for LVCMOS format. The 'Q0142' represents the factory-assigned frequency table parameters.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements must match the 20-pin QFN footprint and electrical specifications. Alternative MEMS clock generators from other manufacturers may require level shifting or different termination schemes due to varying output drive strengths.