HMC842LC4B

Overview

The HMC842LC4B is a 1:2 fanout buffer designed for high-speed serial data transmission and clock distribution. It supports data rates up to 45 Gbps and operates with clock frequencies up to 28 GHz. The device features independent programmable output voltage swing for each channel, ranging from 400 mVp-p to 1200 mVp-p differential. It consumes 465 mW of power with less than 500 fs additive RMS jitter. The component utilizes a 24-lead 4x4mm QFN surface-mount package and operates within a temperature range of -40°C to +70°C.

Feature Summary

• Supports data transmission rates up to 45 Gbps and clock frequencies up to 28 GHz
• Features independent programmable output voltage swing for each channel
• Provides low additive RMS jitter performance below 500 fs
• Utilizes a compact 24-lead 4x4mm SMT package

Applications

• OC-768 and SDH STM-256 equipment
• RF ATE applications
• Short, intermediate, and long haul fiber optic applications
• Broadband test and measurement
• Serial data transmission up to 45 Gbps

Procurement Notes

Verify the specific suffix (e.g., LC4B) against the manufacturer's current datasheet to ensure functional compatibility, as suffixes may indicate packaging or revision differences. Confirm availability status, as this component may be subject to limited supply or end-of-life restrictions. Cross-reference pinouts and thermal requirements with your PCB design specifications before integration.

Selection Notes

Select this component when designing systems requiring high-speed fanout buffering for signals exceeding 28 GHz. Ensure the application can accommodate the 465 mW power dissipation and the specific 400-1200 mVp-p programmable output swing range. Verify that the 24-lead QFN package fits the available board space and thermal management constraints.

Part Context

The HMC842LC4B belongs to the HMC842 series of high-speed logic ICs manufactured by Analog Devices. It is categorized under buffers and line drivers, specifically optimized for clock distribution and signal integrity in high-frequency digital communication systems. The device represents a solution for maintaining signal quality in dense, high-bandwidth environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.