Renesas Electronics Corporation
FemtoClock NG universal frequency translator, 4 outputs, 0.35 ps RMS jitter, 40-VFQFN
The Renesas 8T49N241-998NLGI is a single-PLL universal frequency translator and jitter attenuator used on optical line cards, networking switches and telecom equipment. The -998 option boots its configuration from an external I2C EEPROM. Authorized stock is at zero with lead times around 26 to 33 weeks, and Renesas has moved its timing portfolio to SiTime. Cerametronics helps buyers bridge build gaps with traceable stock.
Key Specifications
Verify against the original datasheet before quoting.
| Function | Frequency translator / jitter attenuator, 1 fractional-feedback PLL |
|---|---|
| Inputs / Outputs | 2 inputs; 4 differential outputs (LVPECL, LVDS, HCSL or LVCMOS) |
| Frequency Range | Input 8 kHz to 875 MHz; output 8 kHz to 1.0 GHz |
| Jitter | 0.35 ps RMS typical (12 kHz to 20 MHz) |
| Supply | Core 2.5 V or 3.3 V; outputs 1.8 / 2.5 / 3.3 V |
| Package | 40-VFQFN, 6 x 6 mm (-998: boot from EEPROM) |
Market Status
Shortage – Extended Lead Time Factory lead time is currently around 33 weeks.
Quality & Traceability
Cerametronics is ISO 9001 certified and products are RoHS compliant, with counterfeit screening and full traceability on every shipment. A Certificate of Conformance is available on request. For allocation-sensitive or high-risk lots, independent third-party lab verification can be arranged — just flag it on your RFQ. Any lot that fails incoming inspection is quarantined and never shipped.
FAQ
What does the -998 suffix mean?
-998 is the boot-from-EEPROM option: the device loads its configuration from an external I2C EEPROM at power-up.
Is 8T49N241 still active after the SiTime acquisition?
Renesas lists it as Active. Its timing portfolio has been acquired by SiTime and new designs are directed to SiTime, so check ordering and support channels for long-term supply.
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