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
Comparison
Applications
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Videos & Training
News & Blog Posts
Blog Post | Apr 14, 2022 | ||
Blog Post | May 22, 2018 | ||
News | Apr 30, 2018 |