NBXDBB018LN1TAG

Programmable Timers And Oscillators Overview

The NBXDBB018LN1TAG is a dual-frequency crystal oscillator from the PureEdge family, designed for 3.3 V LVPECL clock generation. It provides selectable outputs of 155.52 MHz or 311.04 MHz using a high Q fundamental crystal and PLL multiplier. The device features ultra-low jitter (0.4 ps RMS) and phase noise. It operates within a commercial temperature range (-40°C to +85°C) with a total frequency stability of ±20 PPM. Packaged in a hermetically sealed 6-pin CLCC SMD case, it supports networking and SONET/SDH applications.

Programmable Timers And Oscillators Feature Summary

• Dual frequency output: 155.52 MHz (default) or 311.04 MHz via FSEL pin
• Ultra-low jitter: 0.4 ps RMS (12 kHz to 20 MHz)
• Hermetically sealed ceramic CLCC-6 package
• LVPECL differential output with OE control

Programmable Timers And Oscillators Applications

• Networking equipment
• SONET systems
• SDH systems

Programmable Timers And Oscillators Procurement Notes

Verify the specific ordering suffix 'LN1TAG' corresponds to the 1000-unit tape and reel packaging configuration. Confirm that the 'B' designation in the base part number aligns with the required ±20 PPM frequency stability for commercial temperature ranges rather than the industrial variant.

Programmable Timers And Oscillators Selection Notes

Select this component when a 3.3 V supply and LVPECL interface are required for low-jitter clocking. Ensure the design accommodates the 170 kΩ internal pull-up resistors on the OE and FSEL pins, which default to active and 155.52 MHz respectively if left floating.

Programmable Timers And Oscillators Part Context

This part belongs to the NBXDBB/NBXDBA series of dual-frequency oscillators. The 'B' suffix indicates ±20 PPM stability for commercial temperatures, while 'A' denotes ±50 PPM for industrial ranges. It shares the same physical footprint and electrical interface as the NBXDBA018LN1TAG.

Programmable Timers And Oscillators Replacement Considerations

The NBXDBA018LN1TAG serves as a direct functional substitute with identical pinout and performance, differing only in frequency stability specifications (±50 PPM vs. ±20 PPM).

Programmable Timers And Oscillators FAQ

What is the default output frequency?

The default output frequency is 155.52 MHz, which occurs when the FSEL pin is left open or driven HIGH.

How is the output enabled?

The output is active by default because the OE pin has an internal 170 kΩ pull-up resistor. Driving the OE pin LOW places the outputs in a high-impedance state.

What is the recommended termination for the LVPECL outputs?

Outputs should be terminated with 50 Ω receiver termination resistors connected to VTT = VDD - 2.0 V.