PCIe clock distribution for harsh environments
The LMK00334RTVRQ1 is a 1-circuit clock buffer from Texas Instruments, rated for PCI Express (PCIe) main purpose with a maximum output frequency of 400 MHz. It accepts differential inputs across CML, HCSL, HSTL, LVDS, LVPECL, SSTL, and crystal formats, and outputs HCSL or LVCMOS on five outputs from three inputs (3:5 ratio).
Supply rail and thermal pad checklist
The supply range is 3.15V to 3.45V — a clean 3.3V rail with ±5% tolerance covers it, but the narrow margin means the regulator output must stay within 3.15V under load.