DS1818R-20/T&R

Supervisors Overview

The DS1818R-20/T&R is a single-channel voltage supervisor from the EconoReset series, manufactured by Analog Devices Inc./Maxim Integrated. It monitors one input voltage with a threshold of 2.55V and provides a low-active reset signal via an open-drain or open-collector output. The device features a minimum reset timeout of 100ms and operates within a temperature range of -40°C to +85°C. It is housed in a surface-mount SOT-23-3 package.

Supervisors Feature Summary

• Provides simple power-on reset functionality for monitored supply rails
• Features open-drain or open-collector active-low reset output
• Includes a fixed minimum reset timeout delay

Supervisors Applications

• Microprocessor system power monitoring
• Battery-powered device supervision
• Embedded controller reset generation

Supervisors Procurement Notes

Verify the specific suffix 'T&R' indicates tape-and-reel packaging when ordering. Confirm the '-20' designation corresponds to the 2.55V threshold variant. Ensure compatibility with the SOT-23-3 footprint during PCB layout. Check current stock status as availability may vary by distributor.

Supervisors Selection Notes

Select this component when a fixed 2.55V threshold is required for single-supply monitoring. Consider the open-drain output capability for level shifting if the system voltage differs from the supervisor supply. Verify that the 100ms minimum timeout meets the target processor's startup requirements.

Supervisors Part Context

This part belongs to the DS1818 family of voltage supervisors. It shares the same functional architecture as other variants in the series but differs in threshold voltage and package type. The 'R' suffix typically denotes the SOT-23-3 surface-mount package configuration.

Supervisors Replacement Considerations

Direct substitutes include DS1818R-10+T&R (2.88V threshold) and DS1818R-30+T&R (3.08V threshold). Cross-reference pinouts and electrical characteristics before substitution.