DS1086LU-440/V+T

Overview

The DS1086LU-440/V+T is a 3.3V programmable clock generator producing spread-spectrum square-wave outputs from 130kHz to 66.6MHz. It features selectable dithering of 0.5%, 1%, 2%, 4%, or 8% to reduce radiated emissions. The device includes power-down and glitchless output-enable controls, with all settings stored in nonvolatile EEPROM for standalone operation. It operates on a 2.7V to 3.6V supply within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Programmable frequency range from 130kHz to 66.6MHz with 5kHz master frequency step size
• Selectable spread-spectrum dithering (0.5%, 1%, 2%, 4%, 8%) for EMI reduction
• Nonvolatile EEPROM memory stores user-programmable settings for standalone applications
• Glitchless output-enable control and power-down mode for power-sensitive designs

Applications

• Printers
• Copiers
• PCs
• Computer Peripherals
• Cell Phones

Procurement Notes

Verify the specific suffix '440/V+T' against official documentation, as standard listings typically use 'DS1086LU+'. Confirm lead-free/RoHS compliance status and ensure the distributor source matches Analog Devices/Maxim Integrated specifications rather than generic inventory claims.

Selection Notes

Select this component when a single-output spread-spectrum clock is required without external timing components. Ensure the application supports the 2-wire serial interface for configuration or utilizes the factory-default settings. Verify that the load capacitance requirements align with the specified 15pF to 50pF range for stable operation.

Part Context

This part belongs to the DS1086L EconOscillator family, designed as a self-contained clock solution. The 'LU' designation indicates the μSOP package and industrial temperature rating. The '+' suffix denotes lead-free and RoHS-compliant manufacturing standards consistent with Maxim Integrated product lines.

Replacement Considerations

Direct functional replacements include other parts within the DS1086L series such as the DS1086LU+. Verify pin compatibility and EEPROM programming requirements before substitution.

FAQ

How is the output frequency determined?

The output frequency is calculated using the OFFSET, DAC, and prescaler registers. The formula is: fOUTPUT = (MIN FREQUENCY OF SELECTED OFFSET RANGE) + (DAC VALUE x 5 kHz) / PRESCALER.

What is the function of the SPRD pin?

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

Can the device operate without a microcontroller?

Yes, because all settings are stored in nonvolatile EEPROM, the DS1086L can operate in standalone applications without continuous processor intervention.