DS1086LU-455+

Overview

The DS1086LU-455+T is a 3.3V programmable clock generator from the DS1086L series, manufactured by Analog Devices/Maxim Integrated. It produces a spread-spectrum square-wave output with frequencies ranging from 130kHz to 66.6MHz. The device features selectable dithered outputs of 0.5%, 1%, 2%, 4%, or 8% below the programmed frequency to reduce radiated emissions. It operates on a 2.7V to 3.6V supply and includes a power-down mode and glitchless output-enable control. All settings are stored in nonvolatile EEPROM memory for standalone operation.

Feature Summary

• Programmable square-wave generator with frequencies from 130kHz to 66.6MHz
• Selectable dithered output (0.5%, 1%, 2%, 4%, or 8%) for EMI reduction
• Nonvolatile EEPROM memory stores all device settings
• 2-Wire serial interface for programming

Applications

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

Procurement Notes

Verify the specific suffix '+T' indicates tape-and-reel packaging when sourcing. Confirm the '455' designation corresponds to the required factory-programmed default frequency setting, as this parameter is not user-adjustable post-manufacture without reprogramming via the serial interface. Ensure the industrial temperature range (-40°C to +85°C) meets application requirements.

Selection Notes

Select this component if a fixed-frequency spread-spectrum oscillator is required with minimal external components. The DS1086L eliminates the need for external crystals or resonators. Consider the 2-Wire interface compatibility with the host microcontroller. Verify that the desired output frequency falls within the 130kHz to 66.6MHz range and that the available prescaler options allow for the necessary division ratio.

Part Context

The DS1086LU-455+T belongs to the DS1086L EconOscillator family. The 'LU' suffix denotes the -40°C to +85°C industrial temperature range and μSOP package. The '+' indicates lead-free/RoHS compliance. The '455' likely refers to a specific factory-trimmed default frequency setting, distinguishing it from other variants like the DS1086LU-66 or DS1086LU+T which may have different default configurations.

Replacement Considerations

Direct replacements include other DS1086L variants such as DS1086LU+T or DS1086LU-66, provided the default frequency matches the design requirement. Cross-model substitution requires verifying pin compatibility and electrical specifications. Note that changing the part number may alter the factory-programmed default frequency.