8N4Q001KG-0018CDI8

Programmable Timers And Oscillators Overview

The Renesas 8N4Q001KG-0018CDI8 is a programmable quad-frequency voltage-controlled crystal oscillator (VCXO) belonging to the FemtoClock NG series. It utilizes fourth-generation technology to deliver high clock frequencies with low phase noise. The device supports output frequencies ranging from 15.476MHz to 866.67MHz and 975MHz to 1,300MHz, with a programming resolution of 435.9Hz ÷N. It features an I2C interface for frequency, APR, and PLL control, alongside two LVCMOS/LVTTL-compatible control inputs for selecting power-up default frequencies. The component operates on a 2.5V or 3.3V supply within an ambient temperature range of -40°C to +85°C.

Programmable Timers And Oscillators Feature Summary

• Quad-frequency programmability with four power-up defaults reprogrammable via I2C
• Frequency range: 15.476MHz–866.67MHz and 975MHz–1,300MHz
• Absolute pull-range (APR) adjustable from ±4.5ppm to ±754.5ppm
• Low RMS phase jitter (e.g., 0.494ps typical at 156.25MHz)
• Single 2.5V or 3.3V LVDS differential clock output

Programmable Timers And Oscillators Applications

• Wireless infrastructure equipment
• Telecommunication systems
• Networking end equipment

Programmable Timers And Oscillators Part Context

This part is part of the 8N4Q001 family, which shares the same core FemtoClock NG architecture as models like 8N4Q001KG-0049CDI8 and 8N4Q001KG-1127CDI8. The specific suffix '0018' designates the unique set of four power-up default frequencies programmed into the factory. While electrical characteristics such as jitter and pull range are consistent across the family, the default frequency configuration distinguishes this specific order code.

Programmable Timers And Oscillators Replacement Considerations

Direct replacements must match the 10-CLCC package and FemtoClock NG specifications. Models within the 8N4Q001 series may serve as functional substitutes if their specific power-up default frequencies align with the system requirements or if the device is fully reprogrammed via I2C post-installation.