DS1087LU-216

Overview

The DS1087LU-216 is a factory-programmed 3.3V spread-spectrum clock generator producing a 16.6MHz square-wave output with 2% dither. It operates within a 2.7V to 3.6V supply range and features an internal master oscillator, eliminating the need for external timing components. The device includes a user-accessible programmable divider, selectable dither percentages, and power-down modes controlled via hardware pins or a 2-wire serial interface. All settings are stored in nonvolatile EEPROM for standalone operation.

Feature Summary

• Factory programmed at 16.6MHz with 2% peak dither
• No external crystal or resonator required
• Programmable frequency divider (down to 130kHz)
• Glitchless output enable and power-down control

Applications

• Printers
• Copiers
• PCs
• Computer Peripherals
• Cable Modems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and environmental compliance status. Confirm availability through authorized distributors as stock levels fluctuate. Ensure the selected variant matches the required operating temperature range of -40°C to +85°C.

Selection Notes

Select this component when a fixed 16.6MHz clock source with spread-spectrum capabilities is required. Verify that the 2% dither specification meets EMI reduction requirements. Ensure the system design supports the 2.7V to 3.6V voltage range and utilizes the 8-pin µSOP package footprint.

Part Context

This part belongs to the DS1087L EconOscillator family, which integrates a spread-spectrum clock generator into a compact surface-mount package. The 'LU' designation indicates the industrial temperature grade (-40°C to +85°C) and the µSOP package style. The numeric suffix '216' specifies the 16.6MHz frequency and 2% dither configuration.

Replacement Considerations

Other variants within the DS1087LU series offer different frequencies (e.g., DS1087LU-202, DS1087LU-210) or dither percentages (e.g., DS1087LU-416). Direct pin-compatible substitutes may exist from other manufacturers offering similar spread-spectrum oscillators, but electrical parameters must be verified against the datasheet specifications.

FAQ

Can the output frequency be changed after manufacturing?

Yes, the device includes a programmable divider accessible via the 2-wire serial interface, allowing the user to divide the master oscillator frequency down to 130kHz.

What is the purpose of the SPRD pin?

The SPRD pin enables or disables the spread-spectrum dithering function. When held high, dither is enabled; when low, it is disabled.

How does the device handle output glitches during enable/disable?

The DS1087LU-216 features synchronous output-enable control to ensure glitch-free transitions when enabling or disabling the clock output.