NB2308AC3D

Overview

The NB2308AC3D is a commercial-grade, 3.3 V zero delay clock buffer manufactured by onsemi. It features an internal PLL that locks to a reference clock input and provides eight buffered outputs organized into two banks of four. The device supports frequency multiplication, generating 4X frequencies on Bank A and 2X frequencies on Bank B when the feedback pin is driven from Bank A. 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 a 16-pin SOIC package.

Feature Summary

• Zero Delay Buffer with adjustable input-to-output propagation delay via capacitive load on the FBK pin
• Frequency multiplication capabilities: 4X output on Bank A and 2X output on Bank B
• Low skew performance with less than 200 ps output-to-output skew and less than 700 ps device-to-device skew
• Two three-stateable output banks controlled by S1 and S2 select inputs

Applications

• High-speed clock distribution systems requiring precise timing alignment
• Multi-frequency clock generation for digital logic circuits
• System testing applications using direct reference bypass mode

Procurement Notes

Verify the specific ordering suffix to confirm the package type and shipping quantity. The 'D' suffix indicates a 16-pin SOIC package shipped in tubes of 48 units. Ensure the required operating temperature range matches the commercial grade (0°C to +70°C) specified for this part number.

Selection Notes

Select the NB2308AC3D when a 4X/2X frequency multiplication configuration is required for commercial temperature applications. Compare against other variants like NB2308AC1D or NB2308AC4D if different frequency ratios or drive strengths are needed. Verify that the load capacitance requirements align with the 15 pF or 30 pF specifications based on the operating frequency.

Part Context

This component belongs to the NB2308A family of zero delay buffers. The 'C' designation identifies it as the commercial temperature variant, while 'I' denotes industrial grade. The '3' suffix specifically configures the internal divider/multiplier network to provide 4X and 2X frequency outputs depending on the feedback source selection.

Replacement Considerations

NB2308AI3D serves as the industrial temperature equivalent. NB2308AC3DG is the lead-free version of the same functional device.