NB2308AC5HDG

Overview

The NB2308AC5HDG is a commercial-grade, 3.3 V zero delay clock buffer utilizing an on-chip PLL to distribute high-speed reference clocks. It features two banks of four outputs each, with the specific configuration providing REF/2 frequency division on both Bank A and Bank B. The device guarantees input-to-output propagation delays under 250 ps and output-to-output skew below 200 ps. It operates within a 15 MHz to 133 MHz input frequency range and supports selectable drive strengths for optimized signal integrity in complex digital systems.

Feature Summary

• Zero-delay buffering with adjustable input-to-output propagation via capacitive load on the FBK pin
• Dual-bank architecture (Bank A and Bank B) with independent three-state control via S1/S2 select inputs
• Low-skew performance: Output-to-output skew < 200 ps; Device-to-device skew < 700 ps
• Cycle-to-cycle jitter specification of less than 200 ps at 66.67 MHz

Applications

• High-speed clock distribution networks requiring precise phase alignment
• System-on-Chip (SoC) architectures needing multiple low-skew clock domains
• Digital signal processing equipment requiring stable REF/2 clock generation
• Telecommunications infrastructure utilizing advanced CMOS technology for timing synchronization

Procurement Notes

Verify the ordering suffix 'DG' indicates a lead-free package compliant with RoHS standards. Confirm the 'D' suffix corresponds to the SOIC-16 package (Case 751B). Ensure the 'C' designation matches the required commercial operating temperature range of 0°C to 70°C. Cross-reference the full part number against current manufacturer availability lists as supply status may vary.

Selection Notes

Select this variant specifically for its REF/2 frequency division capability across both output banks. Choose the 'H' suffix version if higher drive strength and faster rise/fall times are required compared to standard variants. Ensure the application load capacitance aligns with the specified limits (15 pF for frequencies above 100 MHz) to maintain guaranteed skew and jitter parameters.

Part Context

This component belongs to the NB2308A family of versatile 3.3 V zero delay buffers. The AC5H designation identifies it as a high-drive commercial unit configured for REF/2 output on both banks. Other family members offer different frequency multiplication factors or standard drive levels, making the AC5HDG distinct for applications requiring divided clock signals with enhanced output drive capabilities.

Replacement Considerations

Direct functional substitutes within the same family include other NB2308A variants such as NB2308AC1HDG or NB2308AC4HDG, provided their specific frequency configurations match the circuit requirements. Verify that any replacement maintains the same SOIC-16 footprint and electrical characteristics regarding voltage tolerance and skew specifications.