NB2305AC1DG

Overview

The NB2305AC1DG is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for high-speed clock distribution in commercial applications. It accepts one reference input and drives five low-skew outputs using an internal Phase-Locked Loop (PLL). The device operates within a frequency range of 15 MHz to 133 MHz and features less than 200 ps cycle-to-cycle jitter. Input-output propagation delay is guaranteed at less than 350 ps, while output-to-output skew is maintained below 250 ps. It utilizes advanced 0.35 µm CMOS technology and is housed in an 8-pin SOIC package.

Feature Summary

• Zero input-output propagation delay with output-to-output skew less than 250 ps
• Internal PLL locks to REF pin input; CLKOUT provides on-chip feedback
• Supports operating frequencies from 15 MHz to 133 MHz
• Commercial temperature range operation (0°C to 70°C) with 3.3 V supply

Applications

• CPU clock distribution systems
• PCI bus frequency synchronization
• Pentium-based system clocking

Procurement Notes

Verify the ordering suffix 'DG' indicates a lead-free SOIC-8 package variant. Confirm the 'C' designation corresponds to the commercial temperature range (0°C to 70°C). Ensure compatibility with 3.3 V logic levels and check that the specific revision matches current manufacturing standards.

Selection Notes

Select this component when a single reference clock must be distributed to five loads with minimal skew. The NB2305AC1DG is suitable for commercial environments requiring up to 133 MHz operation. For industrial temperature ranges (-40°C to 85°C), consider the AI1D suffix variants instead.

Part Context

This part belongs to the NB2305A family of zero delay buffers. It shares functional characteristics with other members like NB2304A and NB2309A but is distinct in its five-output configuration. The 'C1' suffix denotes the standard drive version for commercial use, differentiating it from the high-drive '-1H' versions.

Replacement Considerations

Direct replacements include NB2305AI1DG for industrial temperature ranges or NB2305AC1DR2G for tape-and-reel packaging. Cross-vendor equivalents such as CY2305C may require verification of pinout and electrical parameter alignment.