NB2308AC3DTG

Overview

The NB2308AC3DTG is a commercial-grade, 3.3 V zero delay clock buffer manufactured by onsemi in a TSSOP-16 package. 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, delivering 4X and 2X frequencies relative to the reference input depending on feedback configuration. Key electrical specifications include an operating supply voltage range of 3.0 V to 3.6 V, an input frequency range of 15 MHz to 133 MHz, and output-to-output skew guaranteed at less than 400 ps for this specific configuration.

Feature Summary

• Zero Delay Buffer with configurable frequency multiplication (4X/2X) via feedback path selection
• Two independent banks of four outputs each, controllable via S1/S2 select inputs
• Low skew performance: Output-to-output skew < 400 ps; Device-to-device skew < 700 ps
• Cycle-to-cycle jitter < 400 ps at 66.67 MHz with 15 pF or 30 pF loads

Applications

• High-speed clock distribution networks requiring precise phase alignment
• System testing configurations using direct reference bypass mode
• Multi-device clock synchronization where inter-device skew must be minimized

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm RoHS compliance status and Pb-free packaging designation if required by assembly standards. Check current availability as manufacturing status may vary. Ensure proper handling procedures are followed during storage and mounting to maintain device reliability.

Selection Notes

Select the NB2308AC3DTG when 4X and 2X frequency multiplication is required alongside low-skew distribution. Choose the DT suffix for TSSOP-16 surface mount packaging. Verify load capacitance requirements against the 15 pF or 30 pF limits specified for different frequency ranges. Ensure power supply stability within the 3.0 V to 3.6 V range for optimal PLL lock time and jitter performance.

Part Context

This part belongs to the NB2308A family of 3.3 V zero delay buffers. Variants differ by output configuration (x1 to x5H), temperature grade (C for Commercial, I for Industrial), and package type (D for SOIC-16, DT for TSSOP-16). The AC3DTG specifically denotes the Commercial grade, x3 configuration, TSSOP-16 package, and Pb-free construction.

Replacement Considerations

Direct pin-compatible substitutes within the same family include NB2308AI3DTG (Industrial grade) or NB2308AC3DG (SOIC-16 package). Cross-manufacturer equivalents such as Cypress CY2305 series offer similar functionality but require verification of electrical parameters and pinout compatibility before substitution.