DSC400-1111Q0034KI1T

Clock Generators, PLLs, Frequency Synthesizers Overview

The DSC400-1111Q0034KI1T 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 low RMS phase jitter (typically <1 ps) and high stability options of ±25 ppm or ±50 ppm. It includes two independent banks with selectable frequency sets via FSB1/FSB2 pins and output enable controls (OE1/OE2). Packaged in a 20-pin QFN (5.0 mm x 3.2 mm), it meets AEC-Q100 automotive qualification standards.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Crystal-less operation using integrated MEMS resonator eliminates external quartz components.
• Four format-configurable outputs supporting LVPECL, LVDS, HCSL, and LVCMOS standards.
• Pin-selectable frequency tables allow switching between two pre-configured frequency sets per bank.
• High shock and vibration immunity with superior reliability compared to quartz-based devices.

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
• Automotive embedded systems requiring AEC-Q100 qualified timing

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific frequency code assigned by the factory for the Q0034 suffix against project requirements. Confirm that the 'I' suffix corresponds to the industrial temperature grade (-40°C to +85°C) and the 'T' suffix indicates tape and reel packaging. Ensure compatibility with the required output formats before finalizing orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when dual-bank noise isolation is required due to separate VDD1 and VDD2 supplies. Choose based on the necessary frequency stability specification, either ±25 ppm or ±50 ppm. Verify that the target application fits within the maximum frequency limits for the chosen output interface, particularly noting the lower limit for LVCMOS modes.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the DSC400 series of configurable clock generators. It replaces traditional crystal-based oscillators by integrating the resonator directly onto the silicon die. The part number structure encodes output formats, package type, temperature range, stability, and packing method.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct pin-compatible replacements are limited due to factory-configured frequency codes. Evaluate other DSC400 variants with matching stability and temperature grades if frequency requirements differ. Cross-reference electrical characteristics carefully when substituting with non-MEMS alternatives.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum frequency supported by the LVCMOS output format?

The LVCMOS output format supports frequencies up to 170 MHz across all temperature ranges, except for the automotive temperature range where the limit is 100 MHz.

How are the output banks controlled independently?

The device has two independent output enable pins, OE1 and OE2. OE1 controls Bank 1 (CLK0 and CLK3), while OE2 controls Bank 2 (CLK1 and CLK2). Setting these inputs low places the respective outputs in a Hi-Z state.

Does the device require an external crystal for operation?

No, the DSC400 is a crystal-less clock generator that utilizes an internal PureSilicon MEMS resonator and PLLs, eliminating the need for an external quartz crystal.