NB2304AC1D

Overview

The NB2304AC1D is a commercial-grade, 3.3 V zero delay clock buffer manufactured by onsemi. It features an integrated PLL that locks to an input clock presented on the REF pin, with feedback driven to the FBK pin from one of the outputs. The device guarantees an input-to-output propagation delay of less than 250 ps and output-to-output skew of less than 200 ps. It operates within a supply voltage range of 3.0 V to 3.6 V and supports input frequencies from 15 MHz to 133 MHz. The component is housed in an 8-pin SOIC package.

Feature Summary

• Zero input-output propagation delay adjustable via capacitive load on the FBK input
• Integrated PLL for high-speed clock distribution with < 250 ps input-to-output delay
• Low-skew performance with < 200 ps output-to-output skew and < 500 ps device-to-device skew
• Two banks of four buffered clock outputs (CLKA1, CLKA2, CLKB1, CLKB2)

Applications

• PC and workstation clock distribution
• Datacom systems
• Telecommunications equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm the exact configuration variant. The NB2304AC1D designation corresponds to the NB2304AC1DG or NB2304AC1DR2G part numbers listed in the datasheet. Confirm the package type (SOIC-8) and temperature rating (Commercial 0°C to 70°C) match the design requirements before procurement.

Selection Notes

Select this component for applications requiring precise clock synchronization with minimal latency. Ensure all outputs are equally loaded to maintain zero input-output delay characteristics. Verify that the load capacitance requirements (30 pF for 15–100 MHz, 15 pF for 100–133 MHz) align with the target circuit design. Consider the NB2304AC1H variant if faster rise and fall times are necessary.

Part Context

The NB2304AC1D belongs to the NB2304A family of 3.3 V zero delay buffers. This family includes variants such as NB2304Ax1, NB2304Ax1H, and NB2304Ax2, which offer different frequency multiplication configurations. The 'C' suffix indicates the Commercial temperature range, while 'I' denotes the Industrial range. The device utilizes advanced 0.35 µm CMOS technology.

Replacement Considerations

Direct replacements include other members of the NB2304A family, such as NB2304AI1DG for industrial temperature operation. For higher drive strength, the NB2304AC1HDG variant provides faster rise and fall times. Ensure any substitute maintains the 8-pin SOIC footprint and compatible electrical specifications.