MC100EPT21D

Translators, Level Shifters Overview

The MC100EPT21 is a differential LVPECL/LVDS/CML to LVTTL/LVCMOS translator designed for clock or data signal translation. It operates on a single +3.3 V supply with ground, eliminating the need for negative voltages. The device features a typical propagation delay of 1.4 ns and supports maximum frequencies exceeding 275 MHz. It includes an internal VBB output reference voltage for AC-coupled inputs in both single-ended and differential modes. The component is available in SOIC-8, TSSOP-8, and DFN8 packages.

Translators, Level Shifters Feature Summary

• Translates differential LVPECL, LVDS, or CML signals to LVTTL or LVCMOS logic levels using only positive power supplies.
• Provides an integrated VBB output pin that serves as a reference voltage for AC-coupling inputs in single-ended or differential configurations.
• Features temperature-compensated circuitry within the 100 Series architecture to maintain performance across operating ranges.

Translators, Level Shifters Applications

• Clock signal translation between high-speed differential sources and TTL-compatible receivers.
• Data signal interfacing where LVPECL, LVDS, or CML outputs must drive LVTTL or LVCMOS inputs.
• High-frequency timing adjustments requiring low propagation delay and jitter characteristics.

Translators, Level Shifters Procurement Notes

Verify package suffix compatibility (DG for SOIC-8, DTG for TSSOP-8, MNR4G for DFN8) against board layout requirements. Confirm RoHS compliance status and Pb-free marking presence during inspection. Ensure thermal management strategies align with junction-to-ambient resistance values specified for the selected package type under standard airflow conditions.

Translators, Level Shifters Selection Notes

Select this component when translating from differential ECL-family standards to standard CMOS/TTL logic without requiring negative supply rails. Consider the specific package thermal characteristics if operating near maximum temperature limits. Evaluate input coupling methods; direct connection requires external biasing, while AC coupling utilizes the internal VBB pin.

Translators, Level Shifters Part Context

Part of the MC100EPT2 series, which provides differential translation capabilities. The 100 Series designation indicates temperature compensation features inherent to onsemi's ECL family products. This specific model focuses on converting positive ECL variants and related standards to lower voltage digital logic families.

Translators, Level Shifters Replacement Considerations

Check datasheet for functional equivalents within the same family. Verify pinout compatibility and electrical specifications match before substitution. No specific substitute part numbers are confirmed in the provided documentation.

Translators, Level Shifters FAQ

How should the VBB pin be used for AC-coupled inputs?

For single-ended AC coupling, tie the VBB output to the D input. For differential AC coupling, connect the VBB output through a resistor to each input pin. Bypass the VBB pin to VCC via a 0.01 µF capacitor if used.

What happens if the differential inputs are left open?

If left open, the D input pulls down to VEE and the D_bar input biases around VCC/2. The outputs will go to a defined state, though the specific state depends on the power-up sequence.