Renesas Electronics RC22514A FemtoClock™ 2 Clock Generator

Renesas Electronics RC22514A FemtoClock™ 2 Clock Generators are developed to be placed immediately adjacent to a PHY, switch, ASIC, or FPGA that requires several reference clocks with jitter performance of less than 100fs (maximum). The Renesas RC22514A can perform as a frequency synthesizer to locally generate the reference clock or as a DCO for frequency margining or OTN clock applications, depending on an internal crystal reference source. The Renesas RC22514A is a component of Renesas’ high-performance FemtoClock2 family.

Features

Jitter below 100fs RMS maximum (10kHz to 20MHz)
PLL core consists of fractional-feedback Analog PLL (APLL)
- Operates from an integrated 78.125MHz crystal
- APLL frequency independent of input/crystal frequency
- Operates as a frequency synthesizer or Digitally Controlled Oscillator (DCO)
- DCO has a tuning granularity of <1ppb
Supports up to 1MHz I²C or up to 20MHz SPI serial processor port
Can configure itself automatically after reset via internal customer-definable One-Time Programmable (OTP) memory with up to 4x different configurations

Programmable status output
4x differential/8x LVCMOS outputs
- Any frequency from 10MHz to 1GHz (180MHz for LVCMOS)
- Programmable output buffer supports HCSL (DCcoupled), LVDS/LVPECL/CML (AC-coupled), or 2x LVCMOS
- Differential output swing is selectable from 400mV to 800mV
- Output Enable input with programmable effect
4mm x 4mm 28-VFQFPN package

Applications

Reference clock generator for 100Gbps/400Gbps PHYs or switches
Adjustable OTN clock reference for OTU3/OTU4 mappers
Reference clock for programmable FiberOptic Modules

Renesas Electronics RC22514A FemtoClock™ 2 Clock Generator

Features

Applications

Block Diagram

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