The ZL30621 is a fully compliant SEC (G.813) and EEC (G.8262) single channel Network Synchronizer with ultra-low jitter performance of 250fs RMS. The device accepts up to 3 input references and generates up to 3 differential or 6 single-ended CMOS output clocks . An integrated digital phase locked loop (DPLL) with programmable loop bandwidth from 0.1Hz to 10Hz provides G.8262 compliance including hitless reference switching, holdover and jitter filtering. An integrated fractional-N analog PLL (APLL) generates ultra-low jitter output clocks programmable to any frequency between <1Hz to 1035MHz.
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Additional Features
Input Clocks
Three inputs, two differential/CMOS, one CMOS
Any input frequency from 8kHz to 1250MHz (8kHz to 300MHz for CMOS)
Per input activity and frequency monitoring
Automatic or manual reference switching
Low-Bandwidth DPLL
ITU-T G.813/G.8262 compliance (options 1 & 2)
Low- jitter operation from any ≥10MHz TCXO
Master clock jitter attenuator reduces cost by removing TCXO/OCXO low-jitter requirement
Programmable bandwidth, 0.1Hz to 10Hz
Attenuates jitter up to several UI
Hitless Reference Switching
High-resolution holdover averaging
Digitally controlled phase adjustment
Low-Jitter Fractional-N APLL and 3 Output Clocks
Any output frequency from <1Hz to 1035MHz
High resolution fractional frequency conversion with 0ppm error
Encapsulated design requires no external VCXO or loop filter components
Each output has independent dividers
Output jitter as low as 0.25ps RMS (12kHz - 20MHz integration band)
Each output is CML or 2 x CMOS, can interface to LVDS, LVPECL, HSTL, SSTL and HCSL
In 2 x CMOS mode, the P and N pins can be different frequencies (e.g. 125MHz and 25MHz)
Per-output supply pin with CMOS output voltages from 1.5V to 3.3V
Precise output alignment circuitry and per-output phase adjustment
Per-output enable/disable and glitchless start/stop (stop high or low)
General Features
Automatic self-configuration at power-up from internal EEPROM: up to four pin selectable configurations
Numerically controlled oscillator mode
Input-to-output phase alignment with external feedback
SPI or I2C processor interface
Easy-to-use evaluation software
64 pin 5 x 10mm LGA package
The ZL30621 is a fully compliant SEC (G.813) and EEC (G.8262) single channel Network Synchronizer with ultra-low jitter performance of 250fs RMS. The device accepts up to 3 input references and generates up to 3 differential or 6 single-ended CMOS output clocks . An integrated digital phase locked loop (DPLL) with programmable loop bandwidth from 0.1Hz to 10Hz provides G.8262 compliance including hitless reference switching, holdover and jitter filtering. An integrated fractional-N analog PLL (APLL) generates ultra-low jitter output clocks programmable to any frequency between <1Hz to 1035MHz.
Click here for secure documentation
Additional Features
- Input Clocks
- Three inputs, two differential/CMOS, one CMOS
- Any input frequency from 8kHz to 1250MHz (8kHz to 300MHz for CMOS)
- Per input activity and frequency monitoring
- Automatic or manual reference switching
- Low-Bandwidth DPLL
- ITU-T G.813/G.8262 compliance (options 1 & 2)
- Low- jitter operation from any ≥10MHz TCXO
- Master clock jitter attenuator reduces cost by removing TCXO/OCXO low-jitter requirement
- Programmable bandwidth, 0.1Hz to 10Hz
- Attenuates jitter up to several UI
- Hitless Reference Switching
- High-resolution holdover averaging
- Digitally controlled phase adjustment
- Low-Jitter Fractional-N APLL and 3 Output Clocks
- Any output frequency from <1Hz to 1035MHz
- High resolution fractional frequency conversion with 0ppm error
- Encapsulated design requires no external VCXO or loop filter components
- Each output has independent dividers
- Output jitter as low as 0.25ps RMS (12kHz - 20MHz integration band)
- Each output is CML or 2 x CMOS, can interface to LVDS, LVPECL, HSTL, SSTL and HCSL
- In 2 x CMOS mode, the P and N pins can be different frequencies (e.g. 125MHz and 25MHz)
- Per-output supply pin with CMOS output voltages from 1.5V to 3.3V
- Precise output alignment circuitry and per-output phase adjustment
- Per-output enable/disable and glitchless start/stop (stop high or low)
- General Features
- Automatic self-configuration at power-up from internal EEPROM: up to four pin selectable configurations
- Numerically controlled oscillator mode
- Input-to-output phase alignment with external feedback
- SPI or I2C processor interface
- Easy-to-use evaluation software
- 64 pin 5 x 10mm LGA package