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Product Detailed Parameters
- Description：MEMS OSC XO 100.0000MHZ HCSL SMD
- Series：DSC557-03
- PLL：Yes
- Mfr：Microchip Technology
- Main Purpose：PCI Express (PCIe)
- Input：-
- Output：HCSL
- Number of Circuits：1
- Ratio - Input:Output：0:02
- Differential - Input:Output：No/Yes
- Frequency - Max：100MHz
- Voltage - Supply：2.25V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The Microchip Technology DSC557-0344SI1 is a two-output PCI Express clock generator based on silicon MEMS technology. It provides 100 MHz differential HCSL outputs compliant with PCIe Gen1, Gen2, Gen3, and Gen4 common clock specifications. The device integrates an internal MEMS resonator, eliminating the need for external quartz crystals. It operates within a supply voltage range of 2.25V to 3.6V and supports an industrial temperature range of -40°C to +85°C. The component is housed in a 16-TSSOP package.
Feature Summary
- Complies with PCIe Gen1/2/3/4 Common Clock Specifications
- Integrated MEMS Resonator eliminates external 25 MHz crystal requirements
- Two-output configuration providing 100 MHz HCSL signals
- Output Enable/Disable functionality via active-high OE pin
Applications
- Ethernet (1G, 10GBASE-T/KR/LR/SR)
- Storage Area Networks (SAN) and Network Attached Storage (NAS)
- Routers, Switches, and Gateways
- Solid State Drives (SSD) and JBOD systems
Procurement Notes
Verify the specific package type against the datasheet, as the DSC557-03 family typically utilizes a 14-Lead QFN. Confirm that the 16-TSSOP variant matches the required design-in footprint and pinout compatibility before procurement.
Selection Notes
Select this model for designs requiring dual 100 MHz differential clocks for PCIe interfaces. Ensure the system power supply remains between 2.25V and 3.6V. Verify that the 16-TSSOP package dimensions fit the available board space compared to the standard 14-QFN option.
Part Context
This component belongs to the DSC557 series of PCI Express timing solutions. It replaces traditional quartz oscillators to improve reliability and reduce board space. The series includes variants with different output formats such as LVDS and LVCMOS, and various temperature grades.
Replacement Considerations
Direct replacements include other DSC557-03 variants with different packages or output formats. Cross-reference the 16-TSSOP package availability with the manufacturer's current production status.
