NB2305AI1DR2G

Overview

The NB2305AI1DR2G is a 3.3 V zero-delay clock buffer manufactured by onsemi, belonging to the NB2305A series. It features a single circuit with one CMOS input and five CMOS outputs, providing a 1:5 fan-out ratio. The device operates within an output frequency range of 15 MHz to 133 MHz and supports a supply voltage between 3 V and 3.6 V. Designed for surface-mount installation, it is housed in an 8-SOIC package (0.154" width) and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Zero-delay buffering architecture ensures minimal propagation delay skew between input and output clocks.
• Provides five buffered CMOS outputs from a single CMOS input for high-fanout applications.
• Operates at frequencies up to 133 MHz with a 3.3 V nominal supply voltage.
• Available in a compact 8-SOIC surface-mount package suitable for space-constrained designs.

Applications

• Clock distribution networks requiring low-skew signal integrity.
• System-on-chip (SoC) interfaces needing multiple synchronized clock sources.
• High-speed digital logic circuits demanding precise timing alignment.

Procurement Notes

Verify component authenticity through authorized channels due to potential counterfeit risks. Confirm RoHS compliance status via current datasheets as regulatory requirements evolve. Check for End-of-Life (EOL) notices or Product Change Notifications (PCN) that may affect long-term availability. Ensure storage conditions respect moisture sensitivity levels to prevent package damage during soldering.

Selection Notes

Select this component when a 1:5 clock fan-out is required without additional phase noise degradation. Compare against NB2304AI1DR2G if only four outputs are needed, or NB2308AI1DR2G for eight outputs. Ensure the target application voltage aligns with the 3.0 V to 3.6 V operating range. Verify that the 8-SOIC footprint matches the PCB layout constraints.

Part Context

This part belongs to the NB2305A family of zero-delay buffers, which also includes variants like NB2305AI1HDTR2G in TSSOP-8 packaging. These devices share similar electrical characteristics but differ in physical form factors. The NB2305A series is designed to replace older discrete clock buffer solutions, offering integrated PLL-based jitter attenuation capabilities within a small footprint.

Replacement Considerations

Direct pin-to-pin replacements include NB2305AI1HDTR2G (TSSOP-8 package) for different board space requirements. Cross-family alternatives such as Microchip PL123-09SC offer similar buffering functions but require design verification for compatibility.