NB2308AC1DG

Overview

The NB2308AC1DG is a commercial-grade, 3.3 V zero delay clock buffer manufactured by onsemi in a 16-pin SOIC package. It features an internal PLL that locks to a reference clock input (REF) and distributes the signal to eight outputs organized into two banks of four. The device ensures zero input-to-output propagation delay by synchronizing the feedback pin (FBK) with one of the outputs. Key electrical specifications include an operating frequency range of 15 MHz to 133 MHz, output-to-output skew of less than 200 ps, and cycle-to-cycle jitter under 200 ps. It supports three-state control via select inputs and operates within a temperature range of 0°C to 70°C.

Feature Summary

• Zero Delay Buffer: Internal PLL aligns output phase with the REF input, achieving near-zero input-to-output propagation delay.
• Low Skew Performance: Guarantees output-to-output skew of less than 200 ps and device-to-device skew of less than 700 ps.
• Configurable Output Banks: Eight outputs divided into two banks (A and B), each controllable for three-state operation or direct bypass mode.
• Commercial Temperature Range: Designed for ambient temperatures between 0°C and 70°C with 3.3 V supply voltage.

Applications

• High-speed clock distribution in computing systems
• Synchronization of multiple components requiring low-skew clock signals
• System testing via direct reference clock bypass mode

Procurement Notes

Verify the ordering suffix 'DG' indicates a lead-free SOIC-16 package as specified in the manufacturer's documentation. Confirm the 'C' suffix corresponds to the commercial temperature range (0°C to 70°C). Ensure compatibility with 3.3 V logic levels and check for any specific handling requirements related to the CMOS technology used.

Selection Notes

Select the NB2308AC1DG when a zero-delay buffer with 1:8 fan-out is required for commercial applications. Choose this part over industrial variants if the operating environment stays within 0°C to 70°C. Consider the NB2308AC1H variant if higher drive strength and faster rise/fall times are needed for heavier capacitive loads.

Part Context

The NB2308AC1DG belongs to the NB2308A family of 3.3 V zero delay clock buffers. This family includes various configurations (x1, x2, x3, x4, x5H) offering different frequency multiplication options and drive strengths. The AC1 variant specifically provides a 1:1 frequency ratio for both output banks, serving as a standard buffer without multiplication.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate other members of the NB2308A family, such as NB2308AI1DG for industrial temperature ranges, or similar zero-delay buffers from other manufacturers only if their datasheets confirm pinout and electrical compatibility.