NB2308AI1DTG

Overview

The NB2308AI1DTG is a 3.3 V zero delay clock buffer from the NB2308A family, manufactured by onsemi using advanced 0.35 µm CMOS technology. It features an internal PLL that locks to a reference clock input and provides eight buffered outputs divided into two banks of four. The device guarantees an input-to-output propagation delay of less than 250 ps and output-to-output skew under 200 ps. It operates within a frequency range of 15 MHz to 133.3 MHz with a supply voltage between 3.0 V and 3.6 V. This industrial-grade component is housed in a 16-pin TSSOP package.

Feature Summary

• Zero Delay Buffer: Input-to-output propagation delay < 250 ps; adjustable via capacitive load on FBK pin.
• Low Skew Performance: Output-to-output skew < 200 ps; device-to-device skew < 700 ps.
• Flexible Configuration: Supports multiple frequency ratios (1X, 2X, 4X) based on feedback source selection.
• Bank Control: Two banks of four outputs each, controllable via S1/S2 select inputs for three-stating or bypass modes.

Applications

• High-speed clock distribution networks requiring low skew.
• System testing applications utilizing direct input-to-output bypass mode.
• Multi-device clock synchronization where inter-device skew must be minimized.

Procurement Notes

Verify the specific suffix 'DTG' confirms the TSSOP-16 package, Industrial temperature range (-40°C to +85°C), and Pb-Free status. Confirm availability as this part number may have limited stock or end-of-life status depending on the distributor. Ensure the application matches the 1X configuration requirements specified for the AI1 variant.

Selection Notes

Select NB2308AI1DTG when a 1:8 ratio (Reference to Reference) is required without frequency multiplication. Choose the 'I' suffix for industrial temperature operation and 'DT' for the TSSOP-16 package. Verify that the feedback loop can be closed from Bank A or Bank B outputs to achieve the desired zero-delay characteristic. Ensure load capacitance is balanced across all outputs to maintain skew specifications.

Part Context

This component belongs to the NB2308A series of 3.3 V zero delay buffers. The 'AI1' designation indicates the Industrial temperature grade and the specific 1X frequency configuration. Other variants in the series include high-drive versions (e.g., AI1H) and multipliers (e.g., AI2, AI3, AI4).

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consider checking for updated revisions within the NB2308A family or consulting manufacturer resources for cross-reference data.