Renesas Electronics DB1900ZL OEM DERIV LITE 6x6 MM, PLL clock generator, 400 MHz, 1:19 fanout, HCSL outputs, 80-VFQFN dual-row exposed pad, tray.
| Parameter | Value |
|---|---|
| Mounting type | Surface Mount |
| Voltage | 3.135V ~ 3.465V |
| Frequency | 400MHz |
| Operating temperature | -40°C ~ 85°C |
| PLL | Yes |
| Input | Clock |
| Output | HCSL |
| Package | Tray |
| Main purpose | Intel QPI, PCI Express (PCIe) |
| Case | 80-VFQFN Dual Rows, Exposed Pad |
| Number of circuits | 1 |
| Ratio - Input:Output | 1:19 |
| Differential - Input:Output | Yes/Yes |
The 9ZXL1951DNHGI is a PLL-based clock generator from Renesas, delivering up to 400 MHz on HCSL outputs with a 1:19 input-to-output ratio. It is designed to clock Intel QPI and PCI Express interfaces — the fanout density suits a server or switch backplane where one reference clock must feed multiple endpoints without rebuffering.
The dual-row pin layout keeps the 19 outputs routable on a 4-layer board with minimal via stubs.
Both parts are PLL clock generators with the same 400 MHz ceiling, HCSL outputs, 80-QFN package, and industrial temperature range. The key difference is fanout: the 9ZXL1951DNHGI provides a 1:19 input-to-output ratio, while the 9ZXL0851EKKLF offers 1:8.