NB2308AC1HDT

Overview

The NB2308AC1HDT is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for high-speed clock distribution. It features an integrated PLL that locks to a reference input on the REF pin, with feedback driven from one of the eight outputs to the FBK pin. The device guarantees an input-to-output propagation delay of less than 250 ps and output-to-output skew under 200 ps. It operates within a frequency range of 15 MHz to 133 MHz, powered by a 3.0 V to 3.6 V supply. The component is housed in a TSSOP-16 package and supports commercial temperature operation.

Feature Summary

• Zero Delay Buffer: Input-to-output propagation delay < 250 ps; adjustable via capacitive load on FBK input.
• Low Skew Performance: Output-to-output skew < 200 ps; device-to-device skew < 700 ps.
• Configurable Outputs: Two banks of four outputs (Bank A and Bank B) controllable via S1/S2 select inputs.
• High Drive Capability: 'H' suffix denotes high-drive version with faster rise/fall times compared to standard variants.

Applications

• High-speed clock distribution systems requiring low jitter.
• Multi-device synchronization where inter-device skew must be minimized.
• Systems requiring configurable clock frequencies (Reference, 2X, 4X) via feedback path selection.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. The 'DT' suffix indicates a TSSOP-16 package, while 'C' denotes Commercial operating range. Confirm availability status as product lifecycles may change. Ensure RoHS compliance requirements match the specific sub-part number suffix if lead-free packaging is required.

Selection Notes

Select this variant when a high-drive output capability is needed alongside zero-delay buffering. The 'H' configuration provides faster edge rates suitable for higher frequency loads or longer trace lengths. Ensure the application requires the specific 1:8 ratio and single-circuit topology. Verify that the load capacitance requirements align with the 15 pF limit for frequencies above 100 MHz to maintain specified timing parameters.

Part Context

This part belongs to the NB2308A family of 3.3 V zero delay buffers. The base model NB2308A offers multiple configurations (x1, x2, x3, x4, x5H). The AC1HDT designation specifically identifies the Commercial temperature grade, '1' configuration (Reference/Reference), High-drive outputs, and TSSOP-16 surface-mount packaging.

Replacement Considerations

Direct replacements within the same family include NB2308AI1HDT for Industrial temperature range or NB2308AC1D/NB2308AC1HD for SOIC-16 packages. Cross-vendor equivalents such as Cypress CY2305 series share similar zero-delay buffer functionalities but require verification of pin compatibility and electrical specifications.