NB2305AC1HD

Overview

The NB2305AC1HD is a commercial-grade, 3.3 V zero delay clock buffer manufactured by onsemi. It accepts one reference input and drives five low-skew outputs using an internal PLL locked to the REF pin. The device operates within a frequency range of 15 MHz to 133 MHz. Key electrical specifications include output-to-output skew less than 250 ps, device-to-device skew less than 700 ps, and cycle-to-cycle jitter under 200 ps. Input-output propagation delay is guaranteed at less than 350 ps. The component utilizes advanced 0.35 µm CMOS technology and is housed in an 8-pin SOIC package.

Feature Summary

• Zero input-output propagation delay with internal PLL feedback
• Five low-skew outputs with skew less than 250 ps
• Device-to-device skew guaranteed less than 700 ps
• Cycle-to-cycle jitter less than 200 ps

Applications

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

Procurement Notes

Verify the specific ordering suffix for packaging requirements. The base model NB2305AC1HD corresponds to the D suffix (SOIC-8) shipped in rails containing 98 units per rail. Confirm that the 'C' designation matches the required commercial temperature range of 0°C to 70°C before procurement.

Selection Notes

Select this part for applications requiring a single input to drive multiple loads with minimal skew. Ensure all outputs, including CLKOUT, are uniformly loaded to achieve zero input-output delay. For higher drive strength and faster rise/fall times compared to the standard -1 version, verify if the -1H variant is necessary, though this specific model is the high-drive configuration.

Part Context

This component belongs to the NB2305A family of 3.3 V zero delay buffers. The 'C' suffix indicates the commercial operating temperature range (0°C to 70°C), while 'I' denotes industrial range (-40°C to 85°C). The '1H' suffix identifies it as the high-drive version with improved transition speeds compared to the base -1 devices.

Replacement Considerations

Public confirmed substitute part numbers: None.