NB2308AI4DTG

Overview

The NB2308AI4DTG is a 3.3 V zero delay clock buffer from the NB2308A family, manufactured by onsemi. It features an internal PLL that locks to a reference clock input (REF) and provides eight CMOS outputs divided into two banks of four. The device supports industrial temperature operation (-40°C to +85°C) and utilizes a TSSOP-16 package. Key electrical specifications include an input frequency range of 15 MHz to 133 MHz, output-to-output skew less than 200 ps, and device-to-device skew less than 700 ps. Supply current varies with frequency, reaching up to 49 mA at 100 MHz.

Feature Summary

• Zero Delay Buffer: Input-to-output propagation delay is adjustable via capacitive load on the FBK pin; guaranteed less than 250 ps.
• Configurable Output Banks: Two banks of four outputs each can be controlled by select inputs (S1, S2) for three-stating or bypass modes.
• Low Skew Performance: Output-to-output skew is less than 200 ps, and device-to-device skew is less than 700 ps.
• PLL Frequency Range: Supports input frequencies from 15 MHz to 133 MHz with cycle-to-cycle jitter less than 200 ps.

Applications

• High-speed clock distribution in PC and workstation architectures.
• Datacom and telecom system timing networks.
• Multi-device clock synchronization requiring low skew.

Procurement Notes

Verify the ordering suffix 'DTG' corresponds to the TSSOP-16 package and Pb-Free status as defined in the manufacturer's ordering information table. Confirm the 'I' designation indicates Industrial temperature range compliance. Check for specific shipping configurations such as rail or tape & reel quantities if applicable to the specific sub-part number variant.

Selection Notes

Select this component when an eight-output zero delay buffer is required with industrial temperature ratings. Ensure the application load capacitance matches the specified limits (15 pF for >100 MHz, 30 pF for <100 MHz). Verify that the feedback path configuration aligns with the desired frequency multiplication or division ratios defined in the NB2308Ax4 configuration table.

Part Context

This part belongs to the NB2308A series of 3.3 V zero delay buffers. The 'I' suffix denotes Industrial temperature grade, while 'DTG' specifies the TSSOP-16 package with lead-free construction. Other variants in the series include SOIC packages and different output configurations (e.g., NB2308AC1D, NB2308AI1HDG).

Replacement Considerations

Direct replacements within the same family include NB2308AI4DG (SOIC-16 package) or NB2308AI4DTR2G (Tape & Reel). Cross-manufacturer equivalents like Cypress CY2305C share similar zero-delay buffer functionality but require verification of pinout and electrical parameters.