NB2309AC1DTG

Overview

The NB2309AC1DTG is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for distributing high-speed clocks in the 15 MHz to 133 MHz range. It accepts one reference input and drives nine low-skew outputs grouped as four plus four plus one. The device features an internal phase-locked loop (PLL) that locks to the REF pin input, with feedback obtained from the CLKOUT pad. It operates within a commercial temperature range of 0°C to 70°C and utilizes advanced 0.35 µm CMOS technology.

Feature Summary

• Zero input-to-output propagation delay with output-to-output skew less than 250 ps
• Internal PLL with selectable bypass mode via S1 and S2 select inputs
• Device-to-device skew guaranteed less than 700 ps when multiple units share an input
• Cycle-to-cycle jitter less than 200 ps at 66.67 MHz

Applications

• CPU and PCI bus frequency distribution
• Pentium/C0082 based systems requiring low jitter
• High-speed clock buffering and fan-out

Procurement Notes

Verify the package suffix 'DT' corresponds to the TSSOP-16 form factor (CASE 948F). Confirm the 'C1' designation indicates the commercial temperature grade (0°C to 70°C) rather than industrial (-40°C to 85°C). Ensure the ordering code matches the specific shipping configuration required for production integration.

Selection Notes

Select this component when a single reference clock must drive up to nine loads with minimal skew. The -1 variant provides standard drive strength; if faster rise and fall times are necessary, consider the -1H version. Ensure all outputs, including CLKOUT, have equal capacitive loading to maintain zero input-to-output delay characteristics.

Part Context

This part belongs to the NB2309A family of 3.3 V zero delay buffers. Variants include the SOIC-16 package (suffix D), the TSSOP-16 package (suffix DT), and higher-drive -1H versions. The AC1DTR2G variant represents the same functional device in a tape-and-reel packaging format.

Replacement Considerations

Public confirmed substitute part numbers: NB2309AI1DTG, NB2309AC1D, NB2309AC1DR2G.