NB2308AI1DTR2G

Overview

The NB2308AI1DTR2G is a 3.3 V zero delay clock buffer from onsemi, designed for high-speed clock distribution. It features an internal PLL that locks to a reference clock input (REF) and requires feedback from one of the outputs to the FBK pin. The device provides eight buffered clock outputs organized into two banks of four, controlled by select inputs S1 and S2. It supports input frequencies from 15 MHz to 133.3 MHz with less than 250 ps input-to-output propagation delay and less than 200 ps output-to-output skew. The part operates within a supply voltage range of 3.0 V to 3.6 V and is available in a 16-pin TSSOP package.

Feature Summary

• Zero delay buffer with adjustable input-to-output propagation delay via capacitive load on the FBK pin
• Internal PLL with low-skew outputs: <200 ps intra-bank skew and <700 ps inter-device skew
• Two banks of four outputs each, controllable via S1/S2 select inputs for three-stating or bypass modes
• Industrial temperature range operation (-40°C to +85°C) with 3.3 V supply

Applications

• High-speed clock distribution in computing systems
• System testing requiring direct input clock application to outputs
• Multi-device clock synchronization where low inter-device skew is critical

Procurement Notes

Verify the industrial temperature grade indicated by the 'I' suffix and the tape-and-reel packaging specified by 'R2'. Confirm RoHS compliance via the 'G' suffix if required. Check current availability status as this component may be subject to end-of-life notices or limited stock from authorized distributors.

Selection Notes

Select this variant for industrial applications requiring 1:8 fanout with zero delay characteristics. Ensure the feedback path configuration matches the desired frequency multiplication or division ratio defined in the NB2308A configurations table. Verify that the load capacitance on the FBK pin aligns with the required input-to-output delay specifications.

Part Context

This part belongs to the NB2308A family of 3.3 V zero delay buffers. The 'AI1' designation indicates the industrial temperature range and the specific x1 configuration where output frequencies equal the reference frequency. The 'DTR2G' suffix specifies the 16-pin TSSOP package, tape-and-reel shipping format, and lead-free construction.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.