company blog about Renesas RC38108A100GBB FemtoClock®3 Ultra-low Phase Noise Jitter Attenuator and Clock Generator

Renesas RC38108A100GBB FemtoClock®3 Ultra-low Phase Noise Jitter Attenuator and Clock Generator

RC38108A100GBB is an ultra-low phase noise jitter attenuator, multi-frequency clock synthesizer, and digitally controlled oscillator (DCO). This flexible, low-power device outputs clocks with ultra-low inband phase noise and spurious for 4G and 5G RF transceivers and with jitter below 25fs-rms for 112Gbps and 224Gbps SerDes.

Specifications of RC38108A100GBB
Number of Outputs：8 Output
Max Output Freq：2.5 GHz
Maximum Input Frequency：1 GHz
Package/Case：BGA-64
Duty Cycle - Max：55 %
Jitter：25 fs
Supply Voltage - Max：1.89 V
Supply Voltage - Min：1.71 V
Operating Supply Current：29 mA
Minimum Operating Temperature：- 40 C
Maximum Operating Temperature：+ 85 C
Moisture Sensitive：Yes
Operating Supply Voltage：1.71 V to 1.89 V

Output Type：CML, HCSL, LVCMOS, LVDS

Features of RC38108A100GBB
Ultra-low phase noise synthesizer with jitter below 25fs RMS, 12kHz to 20MHz with 4MHz HPF
Two independent low phase noise sync domains
Four independent low phase noise frequency domains
Support for JESD204B/C
Time sync block with time to digital converter (TDC), time of day (TOD) counter, and PTP clocks
8 clock outputs with independent integer dividers
6: LVDS, HCSL (AC-LVPECL) or CML
2: LVDS, HCSL (AC-LVPECL) or LVCMOS
Output frequency range:
CML: DC to 2.5GHz
LVDS or HCSL: DC to 1GHz
LVCMOS: DC to 250MHz
Two differential clock inputs configurable as four single-ended clock inputs
Operates from a 1.8V supply.
Clock inputs tolerate 1.8V input when the device is powered off, sinking less than 1mA
CLKIN input frequency range: DC to 1GHz
Time Sync TDC supports 1PPS and PP2S inputs
DPLLs comply with ITU-T G.8262 and G.8262.1
DPLL input-to-output phase variation ≤ 100ps
DCO frequency resolution < 10-13
Package: 7 × 7 mm, 64-BGA

Applications of RC38108A100GBB
Timing for optical front-end DAC/ADC and DSP
Reference clock for 112Gbps and 224Gbps SerDes
5G distribution units (DU), switches, and routers
High-performance DCO for Precision Time Protocol (PTP) based clocks

Block Diagram of RC38108A100GBB