DS1087LU-21H

Overview

The DS1087LU-21H is a spread-spectrum clock generator from the EconOscillator series, manufactured by Analog Devices / Maxim Integrated. It operates on a single 3.3V supply and generates a 21 MHz output frequency. The device utilizes silicon spread-spectrum technology to reduce electromagnetic interference (EMI) without requiring an external crystal or PLL. It is housed in an 8-pin uMAX package and supports surface-mount installation. The component is designed for applications requiring low-cost, low-power clock generation with inherent EMI reduction capabilities.

Feature Summary

• Integrated spread-spectrum clock generation for EMI reduction
• Single 3.3V power supply operation
• Fixed 21 MHz output frequency
• No external crystal or PLL required
• Available in 8-pin uMAX surface-mount package

Applications

• General-purpose clock generation for digital systems
• Applications requiring reduced EMI emissions
• Low-power embedded system timing sources

Procurement Notes

Verify component authenticity through authorized distributors due to potential availability of obsolete or refurbished units. Confirm RoHS compliance status as specific suffixes may vary. Check for lead-free packaging requirements if applicable to current manufacturing standards. Ensure the 8-pin uMAX footprint matches the target PCB design before procurement.

Selection Notes

Select this model when a fixed 21 MHz clock source with integrated spread-spectrum features is required. It is suitable for designs needing a simple, low-component-count solution without external oscillators. Compare against other frequencies in the DS1087LU series if different clock speeds are needed. Ensure the 3.3V supply voltage aligns with the system's power architecture.

Part Context

The DS1087LU-21H belongs to the DS1087L EconOscillator family, which provides cost-effective clock solutions. This specific variant offers a 21 MHz output. The series is characterized by its ability to generate spread-spectrum clocks directly, eliminating the need for complex PLL circuits or external crystals commonly found in traditional clock generators.

Replacement Considerations

Direct replacements within the same series include other frequency variants such as the DS1087LU-450 or DS1087LU-216. Verify that the alternative part number matches the required output frequency and package type. Cross-reference with updated product notices from Analog Devices for any discontinued status or recommended upgrades.