HMC974LC3CTR

Overview

The HMC974LC3CTR is a silicon germanium monolithic ultra-fast window comparator featuring reduced swing positive emitter-coupled logic (RSPECL) output drivers with level latching. It operates at speeds up to 10 GHz with an equivalent input bandwidth of 11 GHz. The device provides three single-ended negative logic outputs: WOUTB, ORB, and URB. Key electrical parameters include a propagation delay of 88 ps, a maximum offset voltage of ±10 mV, and a power dissipation of 240 mW. It utilizes a 16-terminal 2.9 mm × 2.9 mm LCC package.

Feature Summary

• Features differential latch control for flexible track or latch mode operation.
• Incorporates two proven comparators at the input to ensure good DC and dynamic matching.
• Designed with reduced swing output stages capable of directly driving 400 mV into 50 Ω 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 that the specific ordering suffix matches the required packaging format, as the datasheet lists both reel and tape-and-reel options within the same family. Confirm the moisture sensitivity level rating aligns with your assembly process requirements. Ensure the evaluation board documentation is requested separately if hardware validation is needed for the design phase.

Selection Notes

Select this component when high-speed threshold detection between defined upper and lower reference voltages is required. The device supports direct interfacing with 50 Ω terminated loads via its RSPECL outputs. Consider the thermal resistance and operating temperature range when designing the PCB layout to maintain performance within the specified -40°C to +85°C limits.

Part Context

This part belongs to the HMC974 series of high-speed analog comparators manufactured by Analog Devices Inc. utilizing silicon germanium technology. The series includes variants such as the HMC974LC3C and HMC974LC3CTR-R5, which share identical functional specifications but differ in packaging configurations. The device is designed for applications requiring precise window comparison at multi-gigahertz frequencies.

Replacement Considerations

HMC974LC3C

FAQ

What are the three output states provided by the HMC974LC3CTR?

The device provides Underange (URB), Window (WOUTB), and Overrange (ORB) outputs, which are asserted low based on whether the analog input is below, between, or above the reference levels.

How does the device handle power sequencing?

Power-up requires applying VEE first, followed by VCCI and VCCO. Power-down follows the reverse sequence, ensuring input signals are removed prior to powering down.