ASNT8151-KMC

Overview

The ASNT8151-KMC is a programmable clock multiplication unit (CMU) fabricated in SiGe technology, operating within the 24.0 to 32.1 GHz frequency range. It integrates three selectable voltage-controlled oscillators (VCOs) managed by a phase-locked loop (PLL). The device accepts an LVDS reference clock input at f/16 and generates a full-rate CML differential clock output. Additionally, it provides a divided-by-16 LVDS clock output. Power consumption reaches 530 mW at maximum speed with a single supply of +2.8V or +3.3V. The component utilizes a custom 24-pin CQFP package with a center heat slug for thermal management.

Feature Summary

• Triple-range PLL with three integrated LC-tank VCOs covering 24.0–32.1 GHz
• LVDS reference clock input interface with on-chip 100 Ohm termination
• Full-rate CML differential clock output with internal 50 Ohm termination
• Divided-by-16 LVDS clock output buffer supporting frequencies up to 2.006 GHz

Applications

• High-speed serial communication systems requiring precise clock synthesis
• Test and measurement equipment needing low-jitter clock generation
• Telecommunications infrastructure utilizing multi-GHz signal processing

Procurement Notes

Verify the specific ordering suffix KMC corresponds to the custom 24-pin CQFP package configuration. Confirm power supply requirements (+2.8V or +3.3V) and ensure appropriate external loop filter components are selected based on the recommended schematics in the datasheet. Check RoHS compliance status if required for specific regulatory environments.

Selection Notes

Select this component when a fixed-frequency oscillator is insufficient and programmable frequency synthesis between 24.0 and 32.1 GHz is required. Ensure the application supports LVDS input signals and can accommodate CML output termination. Consider thermal dissipation needs due to the 530 mW power consumption and utilize the package's center heat slug for effective cooling.

Part Context

The ASNT8151-KMC belongs to the ADSANTEC family of high-performance clock generators and PLLs. It is designed for applications demanding high frequency stability and low jitter in the millimeter-wave spectrum. The part distinguishes itself through its triple-VCO architecture, allowing seamless frequency coverage across a wide band without external switching mechanisms.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Evaluate alternatives based on matching frequency ranges (24-32 GHz), output interfaces (CML/LVDS), and package compatibility.