HMC974LC3C

Overview

The HMC974LC3C is a silicon germanium monolithic ultra-fast window comparator featuring reduced swing positive emitter-coupled logic (RSPECL) output drivers. It operates with a propagation delay of 88 ps and a minimum detectable pulse width of 60 ps. The device utilizes three supply voltages: VCCI at 3.3 V, VCCO at 2 V, and VEE at -3 V. It provides differential latch control and dissipates 240 mW of power within a 16-terminal 2.9 mm × 2.9 mm LCC package.

Feature Summary

• Features high-speed latches that can be enabled to latch output data or left in track mode for tracking window comparison.
• Incorporates two proven comparators at the input to provide good DC and dynamic matching while reducing input capacitance.
• Outputs are single-ended negative logic designed to directly drive 400 mV into 50 Ω terminated loads.

Applications

• Automatic test equipment (ATE)
• High speed instrumentation
• Clock and data restoration
• Semiconductor test systems
• Threshold detection in electronic warfare systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging options. Confirm moisture sensitivity level ratings and thermal resistance requirements match the target application environment. Ensure all supply voltage sequencing protocols are strictly followed during installation to prevent device damage.

Selection Notes

Select this component when precise window threshold detection is required at high frequencies. Consider the RSPECL output interface compatibility with downstream circuitry. Evaluate the 2.9 mm × 2.9 mm package dimensions against available board space constraints. Verify that the operating temperature range meets the environmental specifications of the intended deployment scenario.

Part Context

This device belongs to the HMC974 series of high-speed analog comparators manufactured by Analog Devices Inc. It is part of a family of silicon germanium RF ICs designed for demanding signal processing applications. The component serves as a specialized solution for rapid voltage level discrimination in complex electronic systems requiring minimal latency.

Replacement Considerations

HMC974LC3CTR

FAQ

What are the three modes of operation for the outputs?

The outputs determine if the signal is below the window (URB), above the window (ORB), or between the reference levels (WOUTB).

How should the exposed pad be connected?

The exposed pad must be connected to VEE.