The LMK5C33216RGCT from Texas Instruments is a combined clock generator, clock synchronizer, and jitter attenuator with an integrated PLL. It accepts HCSL, LVCMOS, LVDS, LVPECL, or crystal inputs and delivers CML, LVCMOS, LVDS, or LVPECL outputs across a 2:16 input-to-output ratio.
Frequency planning and jitter budget
The three frequency tiers — 200 MHz, 1 GHz, and 3 GHz — let a single device drive a SerDes reference at 3 GHz, a memory bus at 1 GHz, and a control-logic clock at 200 MHz without a separate fan-out buffer. The PLL architecture attenuates input jitter from the upstream oscillator or reference, cleaning the phase noise before distribution. Differential inputs and outputs (Yes/Yes per the spec) preserve signal integrity over board traces longer than a few inches — the LVDS and LVPECL pairs reject common-mode noise picked up between the source and the load.
Package, footprint, and board integration
The 64-VFQFN exposed-pad package (9x9 mm body) requires a thermal land on the PCB to pull heat from the die into the ground plane — the datasheet's recommended footprint includes a central solder-paste aperture the same size as the pad.
Lifecycle and sourcing posture
The base product number LMK5C33216 covers the family; the RGCT suffix denotes the tape-and-reel packaging.