Features
- Fourth generation FemtoClock™ Next Generation (NG) technology
- Seven single-ended LVCMOS outputs, 30? output impedance
- Three LVPECL output pairs One differential LVPECL (QA, nQA) output pair: 156.25MHz Two selectable differential LVPECL output pairs (QB, nQB and QC, nQC): 100MHz and 125MHz
- One single-ended LVCMOS (QD0) 33.33MHz CPU clock
- Selectable external crystal or single-ended input source
- Crystal oscillator interface designed for 25MHz, parallel resonant crystal
- FemtoClock NG frequency multiplier provides low jitter, high frequency output
- FemtoClock NG VCO frequency: 2.5GHz
- RMS phase jitter @ 125MHz, using a 25MHz crystal (12kHz – 20MHz): 0.283ps (typical)
- Power supply noise rejection PSNR: -80dB
- 3.3V supply voltage
- -40C to 85C ambient operating temperature
- Available in lead-free (RoHS 6) packages
843N571I - Block Diagram
Description
The 843N571I is a PLL based clock synthesizer for use in Ethernet applications. The device uses Renesas' fourth generation FemtoClock™ NG technology for optimal high clock frequency and low phase noise performance, combined with a low power consumption and high power supply noise rejection. Using Renesas' latest FemtoClock NG PLL technology, the 843N571I achieves <0.3ps RMS phase jitter performance. 843N571I can synthesize 100MHz, 125MHz, 156.25MHz and a low frequency 33.33MHz CPU clock from a single device. Six LVCMOS outputs also serve as additional buffering of the 25MHz crystal reference.
| Part Number | Status | Samples | Stock | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Qty. per Reel (#) | Qty. per Carrier (#) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 843N571BKILF | Obsolete | N/A | Out of Stock | VFQFPN | 40# | Tray | 3 | 0 | 490# | Yes | e3 Sn | -40 to 85°C |
| 843N571BKILFT | Obsolete | N/A | Out of Stock | VFQFPN | 40# | Reel | 3 | 5000# | 0 | Yes | e3 Sn | -40 to 85°C |
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- End Of Life NoticePDF 1.1 MB Jun 03, 2025
- Product Change NoticePDF 82 KB Jan 23, 2025
- Application NotePDF 187 KB R31AN0065EU0101 Rev.1.01 Nov 14, 2023
- Product Change NoticePDF 728 KB May 13, 2022
- Application NotePDF 170 KB 7WDXRDKU4E7E-5-57318 May 13, 2014
- Application NotePDF 495 KB 7WDXRDKU4E7E-5-57312 May 12, 2014
- Application NotePDF 442 KB 7WDXRDKU4E7E-5-57298 May 08, 2014
- Application NotePDF 115 KB 7WDXRDKU4E7E-5-57294 May 07, 2014
- Application NotePDF 133 KB 7WDXRDKU4E7E-5-57291 May 06, 2014
- Application NotePDF 120 KB 7WDXRDKU4E7E-5-57289 May 06, 2014
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- Application NotePDF 187 KB R31AN0065EU0101 Rev.1.01 Nov 14, 2023
- Application NotePDF 1.99 MB 7WDXRDKU4E7E-5-57242 Mar 01, 2022
Application Notes & White Papers (21)
- End Of Life NoticePDF 1.1 MB Jun 03, 2025
- Product Change NoticePDF 82 KB Jan 23, 2025
- Product Change NoticePDF 728 KB May 13, 2022
- Product Change NoticePDF 983 KB Jun 25, 2019
- Product Change NoticePDF 583 KB 7WDXRDKU4E7E-5-61343 Dec 20, 2016View More (11)
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