MC10EP31MNR4G

Flip Flops Overview

The MC10EP31MNR4G is a single D-type flip-flop from the onsemi 10EP series, designed for high-speed ECL applications. It features asynchronous set and reset inputs and operates in PECL or NECL modes with supply voltages ranging from -5.5 V to +5.5 V. The device provides complementary outputs and achieves a maximum frequency exceeding 3 GHz with a typical propagation delay of 340 ps. Packaged in an 8-lead DFN (2x2 mm) with an exposed thermal pad, it supports surface-mount assembly and functions reliably across an industrial temperature range of -40°C to +85°C.

Flip Flops Feature Summary

• High-speed AC performance with a maximum operating frequency greater than 3 GHz and typical propagation delay of 340 ps.
• Dual-mode operation supporting both PECL (VCC = 3.0 V to 5.5 V) and NECL (VEE = -3.0 V to -5.5 V) logic families.
• Asynchronous level-triggered Set and Reset inputs allow direct control over output states independent of the clock signal.
• Pb-Free, Halogen-Free construction compliant with RoHS standards, housed in a compact 8-VFDFN package.

Flip Flops Applications

• High-speed digital signal processing systems requiring fast clock distribution.
• Telecommunications infrastructure utilizing ECLinPS-compatible interfaces.
• Test and measurement equipment demanding precise timing and low jitter characteristics.

Flip Flops Procurement Notes

Verify that the exposed thermal pad on the DFN8 package is connected to a sufficient thermal conduit or the most negative supply voltage during PCB layout. Ensure proper handling procedures are followed as the device exhibits indefinite moisture sensitivity when stored in drypacks. Confirm that power supply decoupling meets the requirements for maintaining transverse airflow or thermal equilibrium for accurate electrical parameter validation.

Flip Flops Selection Notes

Select this component when designs require the fastest available AC performance within the ECL family, specifically where propagation delays below 400 ps are critical. Compare against the EL31 or LVEL31 devices if legacy pin compatibility is required but higher speed is needed. Ensure the system power architecture supports either positive PECL or negative NECL rails, as input and output parameters vary directly with the chosen supply voltage configuration.

Flip Flops Part Context

The MC10EP31 belongs to the 10EP series, which offers significantly faster AC performance compared to the standard 10EL series. It is functionally equivalent to the EL31 and LVEL31 devices but optimized for applications requiring superior timing margins. The 100EP variant includes internal temperature compensation, whereas the 10EP series relies on external circuit design for thermal stability across the operating range.

Flip Flops Replacement Considerations

Direct functional replacements include the MC10EL31 and MC10LVEL31, though these offer slower propagation delays. For pin-compatible upgrades in existing layouts, verify that the reduced package size of the DFN8 footprint allows for adequate thermal dissipation compared to the original SOIC or TSSOP packages used in previous designs.

Flip Flops FAQ

How do the Set and Reset inputs behave when left open?

The Set and Reset pins feature internal pull-down resistors and will default to a LOW state when left unconnected. Consequently, the Q output will default to LOW if inputs are open or at VEE.

What is the recommended termination for the differential outputs?

The datasheet recommends a standard termination using a 50 Ω resistor to VTT, where VTT is typically set to VCC minus 2.0 V, to ensure proper signal integrity for the differential Q and Q outputs.

Can this device operate with a single-ended clock input?

Yes, the device accepts single-ended ECL clock inputs. The DC characteristics tables provide specific VIH and VIL thresholds for single-ended operation in both PECL and NECL modes.