NB2304AC1HD

Overview

The NB2304AC1HD is a commercial-grade, 3.3 V zero delay clock buffer manufactured by onsemi. 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 four buffered clock outputs organized into two banks. It guarantees an input-to-output propagation delay of less than 250 ps and an output-to-output skew of less than 200 ps. The part operates within a supply voltage range of 3.0 V to 3.6 V and supports input frequencies from 15 MHz to 133 MHz.

Feature Summary

• Zero input-output propagation delay adjustable via capacitive load on the FBK input
• Low-skew performance with output-to-output skew < 200 ps and device-to-device skew < 500 ps
• High-drive version (-1H) with faster rise and fall times compared to standard variants
• Available in an 8-pin SOIC package for space-saving applications

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm the package type and shipping quantity. The 'DG' suffix indicates a rail pack of 98 units, while the 'DR2G' suffix indicates a tape and reel of 2500 units. Ensure the component matches the required temperature grade; 'C' denotes Commercial range (0°C to 70°C), whereas 'I' denotes Industrial range (-40°C to 85°C). Confirm RoHS compliance status as indicated by the 'G' suffix.

Selection Notes

Select the NB2304AC1HD variant when high-drive capability is required for faster signal transitions. This -1H configuration offers improved rise and fall times compared to the standard -1 or -2 configurations. Ensure the application requires a single reference frequency distributed equally across all outputs, as this configuration does not support frequency division or multiplication in the feedback path. Verify that the load capacitance requirements align with the specified limits for the target operating frequency.

Part Context

The NB2304A series includes multiple configurations such as NB2304Ax1, NB2304Ax1H, and NB2304Ax2. The AC1HD designation specifically identifies the Commercial temperature grade, -1H high-drive output configuration, and SOIC-8 package. Other family members like NB2304AI1HDG share similar electrical characteristics but differ in temperature rating. The NB2304Ax2 variant allows for different frequency outputs (REF, 1/2X, 2X) depending on the feedback source, which is not available in the AC1HD model.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the verified datasheet.