Evaluation Kit for 19-Output DB1900Z for PCIe Gen1-4 and QPI/UPI
The evaluation board is designed to help the customer evaluate the 9ZXL1951D. The device is programmable through an SMBus interface. The user guide details the board...
Overview
Description
The 9ZXL1251E is a second-generation, enhanced-performance DB1200ZL differential buffer. The part is a pin-compatible upgrade to the 9ZXL1251A while offering much-improved phase jitter performance and increased system security features. A fixed external feedback maintains low drift for critical QPI/UPI applications.
Features
- LP-HCSL outputs with 85Ω Zout; eliminate 48 resistors, save 82mm² of area
- PCIe Gen 1–5 compliance
- 12 OE# pins; hardware control of each output
- 9 selectable SMBus addresses; multiple devices can share the same SMBus segment
- Selectable PLL BW; minimizes jitter peaking in cascaded PLL topologies
- Hardware/SMBus control of PLL bandwidth and bypass; change mode without power cycle
- Spread spectrum compatible; tracks spreading input clock for EMI reduction
- 100MHz and 133.33MHz PLL Mode; UPI and legacy QPI support
- 9mm x 9mm 64-VFQFPN package; small board footprint
Comparison
Applications
Applications
- Servers/High-performance computing
- nVME storage
- Networking
- Accelerators
- Industrial control
Design & Development
Boards & Kits
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.
Processing table
| VFQFPN | 64 | I | Yes | Tray | 3 | 3.807 | Get Samples, | |
| VFQFPN | 64 | I | Yes | Reel | 3 |
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Videos & Training
PCIe Gen5 Clock Buffers
Introducing Renesas’ enhanced PCIe clock buffer family. These PCIe Gen5 clock buffers offer fanout and zero-delay operating modes, supporting both legacy systems and the most complex timing trees within a single device. Unlike many existing solutions, whose performance limitations force their use in fanout buffer mode, these clock buffers meet both PCIe Gen5 and prominent CPU-specific phase jitter requirements in all operating modes. The extremely low 50fs rms PCIe Gen5 additive phase jitter enables multi-level cascading within the strict PCIe Gen5 jitter budget. Renesas’ high-performance oscillators and clock generators provide an ideal clock source for the enhanced PCIe clock buffer family.
For more information about these PCIe Gen5 clock buffers, visit the PCIe timing page.
Video List