350 MHz PLL with differential outputs — what it means for the clock tree
The Renesas 5P49V5944B000NDGI is a single-circuit PLL-based clock generator from the VersaClock® 5 family. It accepts a LVCMOS or crystal input and can produce up to two output clocks at frequencies up to 350 MHz, selectable between HCSL, LVCMOS, LVDS, or LVPECL formats. The 1:2 input-to-output ratio means one reference fans out to two independent frequency domains, useful for splitting a clean oscillator between an FPGA fabric and a transceiver reference without adding a separate fanout buffer.
Supply range and package — BOM-fit details
The supply voltage spans 1.71 V to 3.465 V, covering 1.8 V, 2.5 V, and 3.3 V logic rails with a single part. That avoids a dedicated regulator for the clock generator when the board already runs one of those voltages. The 20-QFN package measures 3x3 mm with an exposed pad — the pad needs a thermal via array under the land pattern to pull heat into the ground plane, especially if the part is running near the 350 MHz ceiling at 85°C ambient.
Temperature grade and environment
Rated for -40°C to 85°C operation, the 5P49V5944B000NDGI fits industrial environments — outdoor telecom cabinets, motor-drive control boards, and factory automation panels where the ambient can swing beyond commercial limits.
Sourcing and compliance
RoHS3 compliant, with no exemption conflicts for EU-market builds. For volume commitments, qualifying a second-source clock generator from the same VersaClock® 5 family with a similar pinout can hedge against single-supplier risk — the 5P49V5944 series shares the same package and supply range, so a cross-reference check with Renesas is straightforward.