NB2304AC1HDG

Overview

The NB2304AC1HDG is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for high-speed clock distribution in PC, workstation, datacom, and telecom applications. It features an on-chip PLL that locks to an input clock presented on the REF pin, with feedback driven to the FBK pin from one of the outputs. The device guarantees an input-to-output propagation delay of less than 250 ps and output-to-output skew of less than 200 ps. It operates within a supply voltage range of 3.0 V to 3.6 V and supports input frequencies from 15 MHz to 133 MHz. The part is available in an 8-pin SOIC package.

Feature Summary

• Zero input-output propagation delay adjustable by capacitive load on the FBK input
• Two banks of four outputs with output-to-output skew less than 200 ps
• High-drive version (-1H) with faster rise and fall times compared to standard versions
• Device-device skew guaranteed to be less than 500 ps when multiple devices share the same input clock

Applications

• PC clock distribution
• Workstation clock distribution
• Datacom systems
• Telecom equipment

Procurement Notes

Verify the ordering suffix 'HDG' corresponds to the commercial temperature range (0°C to 70°C) and the high-drive output configuration. Confirm the package type is SOIC-8 (CASE 751). Ensure compatibility with 3.3 V logic levels and check if the specific application requires the high-drive capability or if the standard -1 variant suffices.

Selection Notes

Select the NB2304AC1HDG when low skew and zero delay are critical for clock distribution. The 'H' suffix indicates a high-drive version with improved rise/fall times. For industrial temperature ranges (-40°C to 85°C), consider the NB2304AI1HDG instead. Ensure the feedback path is correctly configured to achieve the desired frequency multiplication or division as per the configuration table.

Part Context

The NB2304A series includes variants like NB2304AC1DG, NB2304AC2DG, and their industrial counterparts. The NB2304AC1HDG specifically denotes the commercial grade, high-drive version with a single-stage feedback loop (x1 configuration). Other variants may offer different frequency multiplication options (e.g., x2) or standard drive strengths.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Cross-reference with other NB2304A variants based on required drive strength and temperature range.