NB2308AI1D

Overview

The NB2308AI1D is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for high-speed clock distribution in industrial environments. It features an integrated PLL that locks to a reference clock input on the REF pin, with feedback provided via the FBK pin. The device provides eight outputs organized into two banks of four, controlled by select inputs S1 and S2. Key electrical parameters include an operating supply voltage range of 3.0 V to 3.6 V, an input frequency range of 15 MHz to 133 MHz, and an input-to-output propagation delay guaranteed to be less than 250 ps.

Feature Summary

• Zero input-to-output propagation delay adjustable by capacitive load on the FBK input
• Input frequency range from 15 MHz to 133 MHz
• Output-to-output skew less than 200 ps within the same bank
• Two banks of four outputs each, three-stateable via select inputs

Applications

• High-speed clock distribution systems
• Industrial equipment requiring precise timing
• System testing applications using direct input bypass mode

Procurement Notes

Verify the specific suffix 'I' indicates the Industrial temperature range (-40°C to +85°C) and 'D' denotes the SOIC-16 package. Confirm RoHS compliance status if lead-free packaging is required, as standard versions may differ from Pb-Free variants marked with 'G'. Check current availability as this component series has been subject to discontinuation notices in some regions.

Selection Notes

Select the NB2308AI1D when industrial temperature operation is required alongside zero-delay buffering capabilities. Ensure the application load capacitance matches the datasheet specifications (30 pF below 100 MHz, 15 pF above 100 MHz) to maintain jitter and skew performance. Verify that the feedback path configuration aligns with the desired output frequency multiplication or division ratios defined in the NB2308A configurations table.

Part Context

The NB2308AI1D belongs to the NB2308A family of 3.3 V zero delay buffers. The 'I' suffix specifies the industrial temperature grade, distinguishing it from the commercial grade 'C' variant (NB2308AC1D). This part utilizes advanced 0.35 µm CMOS technology and is available in both SOIC-16 and TSSOP-16 packages.

Replacement Considerations

Direct functional substitutes within the same package and temperature grade include other members of the NB2308A family such as NB2308AC1D (Commercial grade) or NB2308AI1DG (Pb-Free Industrial). Cross-voltage or different output count buffers like the NB2304A require schematic redesign.