HMC874LC3CTR-R5

Overview

The HMC874LC3CTR-R5 is a SiGe monolithic ultra-fast clocked comparator supporting 20 Gbps operation. It features a propagation delay of 120 ps, 60 ps minimum pulse width, and 0.2 ps rms random jitter. The device includes high-speed latches with resistor-programmable hysteresis and differential clock control. It operates on +3.3 V (Vcci), +2.0 V (Vcco), and -3 V (Vee) supplies, dissipating approximately 150 mW. The output stages drive 400 mV into 50 ohms terminated to Vtt = (Vcco - 2.0 V).

Feature Summary

• Supports 20 Gbps data rates with low dispersion characteristics.
• Features resistor-programmable hysteresis for noise immunity adjustment.
• Includes differential clock inputs for precise timing control.
• Designed to directly drive standard 50-ohm loads.

Applications

• Automated Test Equipment (ATE)
• High Speed Instrumentation
• Digital Receiver Systems
• Pulse Spectroscopy
• Clock & Data Restoration

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and reel specifications. Confirm supply voltage requirements match system design constraints. Ensure proper RF grounding techniques are applied during PCB layout. Check thermal dissipation paths as the exposed paddle serves only as a thermal path. Validate input signal ranges against absolute maximum ratings.

Selection Notes

Select this component for applications requiring sub-nanosecond response times and high bandwidth. Consider the 16-lead SMT package size for space-constrained designs. Evaluate power consumption relative to system thermal limits. Ensure compatibility with differential clock sources. Verify that the programmable hysteresis meets the required noise margin specifications.

Part Context

This part belongs to the HMC874 family of ultra-fast comparators manufactured by Analog Devices Inc. It utilizes SiGe technology to achieve high-speed performance in a compact surface-mount package. The device is designed for demanding high-frequency applications where signal integrity and timing precision are critical.

Replacement Considerations

Consult official documentation for verified substitute part numbers. Ensure any replacement maintains compatible supply voltages and pin configurations. Verify that the alternative device supports similar data rates and jitter performance metrics.

FAQ

What is the maximum operating frequency?

The device supports 20 Gbps operation, with 25 GHz achievable under reduced output voltage swing conditions.

How is hysteresis controlled?

Hysteresis is controlled via a dedicated pin connected to Vee through a resistor. Leaving the pin disconnected minimizes hysteresis.

What is the typical propagation delay?

The typical clock-to-data output delay is 120 ps.