NB2308AC4DR2G

Overview

The NB2308AC4DR2G 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 outputs divided into two banks of four. This specific configuration generates 2X the reference frequency on all outputs when the feedback pin is driven from Bank A or Bank B. The device supports input frequencies from 15 MHz to 133.3 MHz with less than 250 ps input-to-output propagation delay and less than 200 ps output-to-output skew. It operates within a supply voltage range of 3.0 V to 3.6 V.

Feature Summary

• Zero Delay Buffer with configurable 2X frequency multiplication on all outputs
• Input frequency range of 15 MHz to 133.3 MHz
• Output-to-output skew guaranteed less than 200 ps
• Two banks of four outputs with three-state control via select inputs

Applications

• High-speed clock distribution in networking equipment
• System synchronization in industrial control systems
• Clock buffering for high-performance processors

Procurement Notes

Verify the component status as the NB2308A family has been subject to End-of-Life notifications. Confirm availability through authorized distributors or secondary market suppliers like Rochester Electronics. Ensure the ordering suffix DR2G corresponds to the tape and reel packaging format required for automated assembly processes.

Selection Notes

Select this part when a 2X clock multiplier is required for all outputs. Verify that the load capacitance requirements (15 pF for >100 MHz) are met to maintain specified timing parameters. Ensure the PCB layout maintains equal loading on all outputs and the feedback pin to achieve zero input-output delay.

Part Context

This component belongs to the NB2308A series of 3.3 V zero delay buffers. The 'C' suffix indicates the commercial temperature range (0°C to 70°C), while 'I' denotes the industrial range (-40°C to 85°C). The '4' designates the specific 2X frequency configuration. Other variants include x1 (reference), x2 (2X/Reference), x3 (4X/2X), and x1H/x5H (high-drive versions).

Replacement Considerations

Direct replacements within the same family include NB2308AI4DR2G for industrial temperature operation. For different configurations, consider NB2308AC1DR2G for reference outputs or NB2308AC2DR2G for mixed 2X/Reference outputs. No cross-family substitutes are documented.