DS1859B-020+T&R

Digital Potentiometers Overview

The DS1859B-020+T&R is a dual, temperature-controlled, nonvolatile variable resistor with three analog monitors and an integrated digital thermometer. It features two 20kΩ, 256-position linear resistors accessible via a 2-wire serial bus. The device includes five monitored channels: VCC, MON1, MON2, MON3, and internal temperature. It operates on a 3.3V or 5V supply within a -40°C to +95°C range. The part number suffix 'T&R' indicates tape-and-reel packaging for automated surface-mount assembly.

Digital Potentiometers Feature Summary

• Dual 20kΩ, 256-position nonvolatile linear variable resistors
• Five monitored channels (Temperature, VCC, MON1, MON2, MON3) with alarm/warning flags
• SFF-8472 compatible with configurable device addresses
• 2-Wire Serial Interface supporting Standard and Fast modes

Digital Potentiometers Applications

• Optical Transceivers
• Optical Transponders
• Instrumentation and Industrial Controls
• RF Power Amps
• Diagnostic Monitoring

Digital Potentiometers Procurement Notes

Verify the 'T&R' suffix confirms tape-and-reel packaging suitable for pick-and-place equipment. Confirm the 'B' designation corresponds to the 20kΩ resistor variant rather than the 50kΩ version. Ensure the '+T&R' designation aligns with lead-free manufacturing standards required by the target assembly process.

Digital Potentiometers Selection Notes

Select this model specifically for applications requiring 20kΩ resistance ranges; use DS1859B-050 for 50kΩ requirements. The device supports both manual and temperature-indexed resistor control modes. Ensure the host system provides a 2-wire serial interface compatible with I2C-like timing protocols for standard or fast mode operation.

Digital Potentiometers Part Context

This component belongs to the DS1859 family of dual temperature-controlled resistors manufactured by Analog Devices Inc./Maxim Integrated. The specific B-020 variant distinguishes itself from the B-050 through its 20kΩ full-scale resistance value while maintaining identical monitoring capabilities and pinout configurations.

Digital Potentiometers Replacement Considerations

Public confirmed substitute part numbers include DS1859B-020 and DS1859B-020+. Verify package compatibility as the base device utilizes a 16-pin CSBGA package.