HMC676LC3CTR-R5

Overview

The HMC676LC3CTR-R5 is a SiGe monolithic latched comparator featuring an RSECL output stage. It supports 10 Gbps operation with a typical propagation delay of 100 ps and a minimum pulse width of 60 ps. The device offers 10 GHz equivalent input bandwidth, 0.2 ps rms random jitter, and 10 ps overdrive dispersion. It operates on a -3 V supply with 120 mW power dissipation in a 16-lead SMT package.

Feature Summary

• Features reduced swing ECL (RSECL) output drivers designed to directly drive 400 mV into 50 ohms terminated to -2 V.
• Includes differential latch control inputs allowing configuration for either latch mode or tracking comparator operation.
• Supports resistor-programmable hysteresis via the HYS pin to adjust noise immunity levels.

Applications

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

Procurement Notes

Verify component authenticity through authorized Analog Devices channels. Confirm datasheet revision status as the part may be obsolete. Ensure proper handling precautions are observed due to electrostatic sensitivity. Validate that the specific suffix matches required packaging specifications before finalizing procurement orders.

Selection Notes

Select this component when high-speed signal comparison with precise timing characteristics is required. The integrated latch functionality distinguishes it from standard comparators, making it suitable for applications requiring data hold capabilities. Verify compatibility with RSECL logic levels and ensure the 16-lead SMT package fits the target PCB footprint constraints.

Part Context

This device belongs to the HMC676 series of ultra-fast comparators manufactured by Analog Devices. It utilizes SiGe technology to achieve high-frequency performance within a compact surface-mount form factor. The product line focuses on providing low jitter and deterministic timing for demanding broadband communication and instrumentation environments.

Replacement Considerations

Check for direct substitutes such as the HMC675LC3CTR or HMC674LC3CTR if RSPECL outputs are preferred. Verify functional equivalence regarding latch mechanisms and output swing requirements before substituting other models in the HMC67x family.

FAQ

How is the hysteresis value adjusted?

Hysteresis is controlled by connecting a resistor between the HYS pin and the Vee supply. The resistance value determines the hysteresis magnitude, which can be determined using the provided graph in the datasheet.

What is the difference between Track Mode and Latch Mode?

In Track Mode, the output follows the logical value of the input. In Latch Mode, the output holds the comparison result present just prior to the latch enable signal going high.