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Product Detailed Parameters
- Description：IC CLOCK GEN PCIE 20VFQFN
- Series：DSC557-04
- PLL：Yes
- Mfr：Microchip Technology
- Main Purpose：PCI Express (PCIe)
- Input：-
- Output：HCSL
- Number of Circuits：1
- Ratio - Input:Output：0:03
- Differential - Input:Output：No/Yes
- Frequency - Max：460MHz
- Voltage - Supply：2.25V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-VFQFN Exposed Pad
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The DSC557-04444KI1 is a crystal-less, three-output PCI Express clock generator utilizing silicon MEMS technology. It meets Gen1, Gen2, and Gen3 specifications with a maximum frequency of 460MHz. The device features HCSL outputs and operates on a 2.25V to 3.6V supply within an industrial temperature range of -40°C to 85°C. Packaged in a 20-VFQFN (5x3.2mm) exposed pad, it includes PLL functionality and independent output enable controls for CLK0 and CLK1/2.
Feature Summary
- Crystal-less design using proven silicon MEMS technology
- Three differential outputs compliant with PCIe Gen1, Gen2, and Gen3 standards
- Independent Output Enable pins (OE1 for CLK0, OE2 for CLK1/2)
- Low power consumption, approximately 30% lower than competing devices
Applications
- Ethernet (1G, 10GBASE-T/KR/LR/SR, FcoE)
- Storage systems (SAN, NAS, SSD, JBOD)
- Networking equipment (Routers, Switches, Gateways)
Procurement Notes
Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type, temperature grade, and output format compatibility. Ensure that the selected variant matches the required stability and interface specifications for the target application.
Selection Notes
Select this component for designs requiring low jitter and high reliability without external crystals. Consider the 20-pin QFN footprint constraints and verify thermal performance requirements. Confirm that the HCSL output format aligns with the downstream receiver logic levels.
Part Context
This part belongs to the DSC557-04 series of PCIe clock generators. It serves as a replacement for quartz-based oscillators, offering improved shock and vibration immunity while qualifying to MIL-STD-883 standards for enhanced reliability in demanding environments.
Replacement Considerations
Direct pin-compatible replacements may exist within the same family or from other manufacturers offering MEMS PCIe clocks. Verify electrical parameters such as jitter performance, supply voltage, and output drive strength before substitution.
