Features
- Fourth generation FemtoClock™ (NG) technology
- Selectable 250MHz, 156.25MHz, 125MHz or 100MHz output clock synthesized from a 25MHz fundamental mode crystal
- Four differential clock outputs (two LVDS and two HCSL outputs)
- Crystal interface designed for 25MHz, parallel resonant crystal
- RMS phase jitter at 156.25MHz, using a 25MHz crystal (1MHz - 20MHz): 0.27ps (typical)
- RMS phase jitter at 156.25MHz, using a 25MHz crystal (12kHz - 20MHz): 0.32ps (typical)
- Power supply noise rejection PSNR: -50dB (typical)
- LVCMOS interface levels for the frequency select input
- Full 3.3V or 2.5V supply voltage
- Available in Lead-free (RoHS 6) package
- -40°C to 85°C ambient operating temperature
Description
The 841N254I is a 4-output clock synthesizer designed for S-RIO 1.3 and 2.0 reference clock applications. The device generates four copies of a selectable 250MHz, 156.25MHz, 125MHz or 100MHz clock signal with excellent phase jitter performance. The four outputs are organized in two banks of two LVDS and two HCSL outputs. The device uses Renesas' fourth generation FemtoClock™ NG technology for an optimum of high clock frequency and low phase noise performance, combined with a low power consumption and high power supply noise rejection. The synthesized clock frequency and the phase-noise performance are optimized for driving RIO 1.3 and 2.0 SerDes reference clocks. The device supports 3.3V and 2.5V voltage supplies and is packaged in a small 32-lead VFQFN package. The extended temperature range supports wireless infrastructure, telecommunication and networking end equipment requirements.
| 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 841N254AKILF | Obsolete | N/A | Out of Stock | VFQFPN | 32# | Tray | 3 | 0 | 490# | Yes | e3 Sn | -40 to 85°C |
| 841N254AKILFT | Obsolete | N/A | Out of Stock | VFQFPN | 32# | Reel | 3 | 2500# | 0 | Yes | e3 Sn | -40 to 85°C |
| 841N254BKILF | Obsolete | N/A | Out of Stock | VFQFPN | 32# | Tray | 3 | 0 | 490# | Yes | e3 Sn | -40 to 85°C |
| 841N254BKILFT | Obsolete | N/A | Out of Stock | VFQFPN | 32# | Reel | 3 | 2500# | 0 | Yes | e3 Sn | -40 to 85°C |
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- End Of Life NoticePDF 1.1 MB Jun 03, 2025
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- 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
- Application NotePDF 160 KB 7WDXRDKU4E7E-5-57287 May 06, 2014
Recommended Documents (1)
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- 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 728 KB May 13, 2022
- Product Change NoticePDF 983 KB Jun 25, 2019
- End Of Life NoticePDF 218 KB 7WDXRDKU4E7E-5-62868 Apr 26, 2018
- Product Change NoticePDF 583 KB 7WDXRDKU4E7E-5-61343 Dec 20, 2016View More (10)
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