Overview

Description

The 9ZX21901D is a second generation DB1900Z differential buffer for Intel Purley and newer platforms. The part is backwards compatible to the 9ZX21901C while offering much improved phase jitter performance. A fixed external feedback maintains low drift for critical QPI/UPI applications. In bypass mode, the 9ZX21901D can provide outputs up to 400MHz. 

Features

  • 19 HCSL output pairs
  • Fixed feedback path
  • Phase jitter: PCIe Gen4 < 0.5ps rms
  • Phase jitter: UPI 9.6GT/s < 0.1ps rms
  • PLL or bypass mode; PLL can dejitter incoming clock
  • 9 selectable SMBus Addresses
  • 8 dedicated OE# pins
  • 100MHz or 133MHz PLL mode; legacy QPI support
  • Selectable PLL bandwidth; minimizes jitter peaking in downstream PLLs
  • Spread spectrum compatible
  • SMBus interface
  • 10 × 10 mm 72-QFN package

Applications

Documentation

Title Type Date
PDF307 KB
Datasheet
PDF1.99 MB
Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
PDF2.40 MB
Overview
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Overview
PDF1.83 MB
Overview
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Schematic

Design & Development

Models