FemtoClock™ NG Crystal-To-HCSL Frequency Synthesizer
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Overview
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 Renesas' 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 0.27ps, easily meets PCI Express jitter requirements. The 841N4830 is packaged in a small 32-pin VFQFN package.
Features
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Fourth generation FemtoClock™ Next Generation (NG) technology
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Three differential HCSL outputs, one differential LVPECL and two single-ended LVCMOS/LVTTL outputs
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Crystal oscillator interface designed for a 25MHz, 12pF parallel resonant crystal
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CLK/nCLK input pair can accept the following differential input levels: LVPECL, LVDS, HCSL
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A 25MHz crystal generates output frequencies of: 100MHz, 50MHz and 25MHz
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VCO frequency: 2GHz
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RMS Phase Jitter @ 100MHz, (12kHz – 20MHz) using a 25MHz crystal: 0.36ps (maximum)
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Power supply noise rejection PSNR: -45dB (typical)
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PCI Express Gen 2 (5 Gb/s) jitter compliant
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Full 3.3V supply mode
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-40°C to 85°C ambient operating temperature
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Available in lead-free (RoHS 6) package
Documentation
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| PDF 888 KB | Datasheet | ||
| PDF 91 KB | Application Note | ||
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| PDF 1.83 MB | Overview | ||
| PDF 728 KB | Product Change Notice | ||
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Product Options
Processing table
| VFQFPN | 32 | I | Yes | Tray | Get Samples, | |
| VFQFPN | 32 | I | Yes | Reel | ||
| VFQFPN | 32 | I | Yes | Reel |
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