NB2308AI2DR2G

Overview

The NB2308AI2DR2G is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for high-speed clock distribution. It features an internal PLL that locks to a reference clock input and provides eight buffered outputs organized into two banks of four. The device supports multiple frequency configurations based on the feedback path selection, enabling 2X and 1X frequencies on each bank. Key electrical specifications include a maximum operating frequency of 133.3 MHz, supply voltage range of 3.0 V to 3.6 V, and output-to-output skew less than 400 ps. It operates within an industrial temperature range of -40°C to 85°C and is housed in a 16-pin SOIC package.

Feature Summary

• Zero Delay Buffer with adjustable input-to-output propagation delay via capacitive load on the FBK pin
• Configurable frequency multiplication: Supports 2X and 1X frequencies depending on feedback source selection
• Low skew performance: Output-to-output skew < 400 ps; Device-to-device skew < 700 ps
• Two selectable output banks with three-state control via S1 and S2 inputs

Applications

• High-speed clock distribution networks requiring low skew
• System testing applications using direct reference bypass mode
• Multi-device clock synchronization where inter-device skew must be minimized

Procurement Notes

Verify the ordering suffix 'DR2G' corresponds to the Tape & Reel packaging format and Pb-Free status as specified in the manufacturer's ordering information. Confirm the 'I' suffix indicates the Industrial temperature grade (-40°C to 85°C). Ensure compatibility with the 16-SOIC (CASE 751B) footprint during procurement planning.

Selection Notes

Select this variant when a 2X/1X frequency configuration is required for both output banks. The 'I' designation specifies industrial temperature operation, while 'C' denotes commercial range. The 'DR2' suffix indicates tape and reel shipping, whereas 'D' indicates rail packaging. Verify that the application load capacitance aligns with the 15 pF or 30 pF limits defined for the target frequency range.

Part Context

This component belongs to the NB2308A family of 3.3 V zero delay buffers. Variants such as NB2308AI1DR2G provide reference frequency outputs, while NB2308AI4DR2G provides 2X frequencies on all outputs. The NB2308AI2DR2G specifically enables mixed 2X and 1X outputs based on the feedback connection from Bank A or Bank B.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.