NB2308AI4DTR2G

Overview

The NB2308AI4DTR2G is a 3.3 V zero delay clock buffer from the NB2308A series, manufactured by onsemi. It features an internal PLL that locks to a reference clock input and provides eight buffered outputs divided into two banks of four. The device supports industrial temperature operation (-40°C to +85°C) and operates within a supply voltage range of 3.0 V to 3.6 V. It accepts input frequencies between 15 MHz and 133 MHz. This specific variant utilizes a TSSOP-16 package with tape and reel shipping configuration.

Feature Summary

• Zero Delay Buffer: Input-to-output propagation delay is adjustable via capacitive load on the feedback pin, guaranteed less than 250 ps.
• Low Skew Performance: Output-to-output skew is less than 200 ps; device-to-device skew is less than 700 ps.
• Configurable Outputs: Two banks of four outputs (Bank A and Bank B) can be controlled via select inputs for three-stating or direct clock application.
• Frequency Multiplication: Configured as NB2308Ax4, it enables 2X clock multiplication on all outputs when feedback is sourced from Bank A or Bank B.

Applications

• High-speed clock distribution in multi-device systems requiring low skew.
• Clock buffering and frequency multiplication (2X) for digital circuits.
• System testing applications using direct clock bypass mode.

Procurement Notes

Verify the ordering suffix 'DTR2G' confirms the TSSOP-16 package and tape and reel shipping format. Confirm the 'I' designation indicates the Industrial temperature range (-40°C to +85°C). Ensure the '4' suffix matches the required 2X frequency multiplication configuration. Check RoHS compliance status if lead-free packaging is mandatory for the assembly process.

Selection Notes

Select this part when 2X frequency multiplication is required across all eight outputs. Compare against NB2308AI1 variants if reference frequency distribution without multiplication is needed. Consider NB2308AI1H or AI5H variants if higher drive strength or REF/2 division is necessary. Verify load capacitance requirements (15 pF for >100 MHz, 30 pF for <100 MHz) match the target circuit design.

Part Context

This component belongs to the NB2308A family of 3.3 V zero delay buffers. The NB2308A series includes multiple configurations (x1, x2, x3, x4, x5H) offering different frequency multiplication options. The NB2308AI4 specifically implements the x4 configuration, providing 2X output clocks relative to the reference input.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.