ZL30256
3-Channel, 10-Input, 18-Output General Purpose Jitter Attenuator and Frequency Multiplier
Overview
The ZL30256 is multi-channel high-performance, any-rate multiplier and jitter attenuator which simplifies board design by generating ultra-low-jitter clock signals from or attenuating clock signals while generating additional independent frequency families.With 3 independent jitter attenuating DPLL channels, the ability to create 5 different frequency families and best-in-class jitter performance, the ZL30256 can create complete clock-trees, improving design reliability, reducing bill of materials (BOM) cost, and simplifying design by replacing multiple PLLs and peripheral timing components.
Key Features
- Up to 3 independent DPLL channels
- Excellent jitter performance of 180 fs RMS in 12 kHz to 20 MHz band meets jitter requirements of 10G/40G and 100G PHYs
- Two programmable ultra-low jitter synthesizers generate any frequency from 1 Hz to 1045 MHz
- One programmable general purpose synthesizer generates any clock from 1Hz to 180 MHz
- 8 differential or 16 single ended (CMOS) ultra-low jitter outputs plus two general purpose CMOS outputs
- Accepts up to 10 LVPECL/LVDS/HCSL/LVCMOS inputs
- Any input reference can be fed with clock, sync (frame pulse), clock /sync pair or clock modulated with sync pulse (embedded PPS ePPS and embedded PP2S ePP2S)
- Up to four programmable digital PLLs/NCOs with loop bandwidth from 14 Hz to 470 Hz synchronize to any clock rate from 1 kHz to 900 MHz and to clock plus sync pulse
- Automatic hitless reference switching and digital holdover on reference fail with initial holdover accuracy better than 1 ppb with post holdover filter
- Easy Configuration and dynamic programming via SPI/I2C interface
- Operates from a single crystal resonator or clock oscillator
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