NB2309AC1HDG

Overview

The NB2309AC1HDG is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for distributing high-speed clocks in commercial applications. It accepts one reference input and drives nine low-skew outputs (configured as two banks of four plus one feedback output). The device operates within a frequency range of 15 MHz to 133 MHz and utilizes an internal Phase Locked Loop (PLL) that locks to the REF pin. Key electrical specifications include an output-to-output skew of less than 250 ps, cycle-to-cycle jitter under 200 ps, and propagation delays under 350 ps. It is housed in a 16-pin SOIC package.

Feature Summary

• Zero Input-Output Propagation Delay with internal PLL feedback
• Nine Low-Skew Outputs with <250 ps output-to-output skew
• Commercial Temperature Range Operation (0°C to +70°C)
• Test Mode Bypassing the PLL via Select Inputs

Applications

• CPU Clock Distribution
• PCI Bus Frequency Distribution
• Pentium-Based System Clocking

Procurement Notes

Verify the specific suffix 'H' indicates the high-drive variant with faster rise/fall times compared to standard '-1' devices. Confirm the 'C' suffix corresponds to the commercial temperature range (0°C to +70°C). Ensure the 'DG' suffix denotes the lead-free package version if required by assembly specifications. Cross-reference the ordering information table for shipping quantities and availability status.

Selection Notes

Select this component when a single reference clock must drive multiple loads with minimal skew. The NB2309AC1HDG provides higher drive capability than the NB2309AC1D variant. Ensure all outputs, including CLKOUT, are uniformly loaded to maintain zero input-output delay characteristics. Verify that the 3.3 V supply voltage aligns with the system design requirements.

Part Context

This part belongs to the NB2309A family of 3.3 V zero delay buffers. The NB2309AC1HDG is the commercial temperature, high-drive version packaged in a 16-pin SOIC. Related variants include the industrial temperature NB2309AI1HDG and the standard drive NB2309AC1D. The family supports both SOIC-16 and TSSOP-16 packages.

Replacement Considerations

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