NB2308AI1HD

Overview

The NB2308AI1HD is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for high-speed clock distribution in industrial environments. It features an internal phase-locked loop (PLL) that locks to an input clock presented on the REF pin, with feedback driven from one of the outputs to the FBK pin. The device provides eight buffered clock outputs organized into two banks of four, controlled via select inputs. Key electrical parameters include an operating supply voltage range of 3.0 V to 3.6 V and an input frequency range of 15 MHz to 133 MHz. The part guarantees an input-to-output propagation delay of less than 250 ps and an output-to-output skew of less than 200 ps.

Feature Summary

• Zero input-output propagation delay achieved through capacitive load adjustment on the FBK input
• High-drive capability with faster rise and fall times compared to standard versions
• Two banks of four outputs each, controllable via S1 and S2 select inputs for tri-state or direct drive modes
• Low cycle-to-cycle jitter of less than 200 ps under standard loading conditions

Applications

• Industrial system clock distribution requiring precise timing alignment
• High-performance computing and datacom applications needing low-skew buffering
• Telecommunications equipment utilizing 3.3 V logic levels

Procurement Notes

Verify the specific suffix 'HD' confirms the Industrial temperature range (-40°C to +85°C) and SOIC-16 package configuration. Confirm RoHS compliance status as the datasheet indicates Pb-Free packages are available but requires checking the specific ordering code against current manufacturer availability lists.

Selection Notes

Select this variant when industrial temperature operation is required alongside high-drive output capabilities. Ensure the application utilizes a 3.3 V supply and operates within the 15 MHz to 133 MHz frequency range. Verify that the PCB layout allows for equal loading on all outputs to maintain the specified zero-delay performance.

Part Context

This component belongs to the NB2308A family of zero delay buffers. The 'I' suffix denotes the Industrial temperature grade, while 'H' indicates the high-drive version. Other variants in the series include commercial grades and different frequency multiplication configurations such as x1, x2, x3, x4, and x5H.

Replacement Considerations

Public confirmed substitute part numbers: NB2308AC1HD, NB2308AI1DG, NB2308AI1DT.