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841N4830

Renesas
Part Number 841N4830
Manufacturer Renesas
Description NG Crystal-to-HCSL Frequency Synthesizer
Published Jun 4, 2020
Detailed Description FemtoClock® NG Crystal-to-HCSL Frequency Synthesizer 841N4830 Datasheet General Description The 841N4830 is a 3 HCSL, ...
Datasheet PDF File 841N4830 PDF File

841N4830
841N4830

Overview
FemtoClock® NG Crystal-to-HCSL Frequency Synthesizer 841N4830 Datasheet General Description The 841N4830 is a 3 HCSL, 1 LVPECL and 2 LVCMOS output Synthesizer optimized to generate PCI Express reference clock frequencies.
The device uses IDT’s fourth generation FemtoClock® NG technology for synthesis of high clock frequency at very low phase noise.
It provides low power consumption with good power supply noise rejection.
Using a 25MHz, 12pF parallel resonant crystal, the following frequencies can be generated: 100MHz, 50MHz and 25MHz.
Maximum rms phase jitter of 0.
36ps, easily meets PCI Express jitter requirements.
The 841N4830 is packaged in a small 32-pin VFQFN package.
Features • Fourth generation FemtoClock® Next Generation (NG) technology • Three differential HCSL outputs, one differential LVPECL and two single-ended LVCMOS/LVTTL outputs • Crystal oscillator interface designed for a 25MHz, 12pF parallel resonant crystal • CLK/nCLK input pair can accept the following differential input levels: LVPECL, LVDS, HCSL • A 25MHz crystal generates output frequencies of: 100MHz, 50MHz and 25MHz • VCO frequency: 2GHz • RMS Phase Jitter @ 100MHz, (12kHz – 20MHz) using a 25MHz crystal: 0.
36ps (maximum) • Power supply noise rejection PSNR: -45dB (typical) • PCI Express Gen 2 (5 Gb/s) jitter compliant • Full 3.
3V supply mode • -40°C to 85°C ambient operating temperature • Available in lead-free (RoHS 6) package Block Diagram nOE_REF Pulldown PLL_BYPASS Pulldown nOEA Pulldown XTAL_IN XTAL_OUT CLK Pulldown nCLK Pullup CLK_SEL Pullup 25MHz OSC 0 1 IREF DIV2_QB Pullup nOEB Pulldown PFD & LPF FemtoClock® NG VCO 2GHz 1 ÷20 0 ÷1 0 ÷80 ÷2 1 REF_OUT nREF_OUT CLK_SEL XTAL_IN XTAL_OUT VDD_OSC VDDO_QB QB Pin Assignment VDDA VDD nOEA VDDO IREF QA0 nQA0 GND 25MHz LVPECL REF_OUT nREF_OUT 100MHz HCSL 3QA[2:0] 3 nQA[2:0] 100MHz LVCMOS QA3 32 31 30 29 28 27 26 25 PLL_BYPASS 1 24 QA1 nOE_REF 2 841N4830 23 nQA1 nOEB 3 32-Lead VFQFN 22 VDDO DIV2_QB 4 5mm x 5mm x 0.
925mm...


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