MDB1900ZBQYY01

Overview

The MDB1900ZBQYY01 is a zero-delay buffer designed for PCI Express and SATA CPU applications. It features one circuit with differential HCSL input and output signaling. The device supports a maximum frequency of 133.33 MHz and operates on a supply voltage range of 2.375 V to 3.465 V. It includes an integrated PLL with bypass capability. The component is housed in a 72-VFQFN exposed pad package, measuring 10x10 mm, and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Zero-delay buffer architecture optimized for PCIe and SATA CPU timing
• Differential HCSL input and output signaling
• Integrated PLL with selectable bypass mode
• Maximum operating frequency of 133.33 MHz

Applications

• PCI Express clock distribution
• SATA CPU interface timing
• High-speed digital system clock buffering

Procurement Notes

Verify the manufacturer designation as Micrel Inc. against current corporate records, noting historical acquisitions. Confirm the specific ordering suffix QYY01 corresponds to the 72-QFN (10x10) package and standard reel/cut tape availability. Ensure compliance with RoHS directives and moisture sensitivity levels prior to procurement.

Selection Notes

Select this component when a zero-delay buffer with HCSL I/O is required for PCIe or SATA interfaces. Ensure the design accommodates the 2.375 V to 3.465 V supply range. Verify that the 133.33 MHz maximum frequency meets system requirements. The 72-VFQFN package requires appropriate PCB footprint design for thermal dissipation.

Part Context

This part belongs to the Application Specific Clock/Timing category. It serves as a critical timing element for high-speed serial interfaces like PCIe and SATA. The zero-delay configuration ensures minimal phase noise between input and output clocks.

Replacement Considerations

Check for pin-compatible alternatives from Renesas or Microchip if Micrel stock is unavailable. Verify electrical parameters such as supply voltage and output drive strength match the original design specifications.