Analog Devices Inc./Maxim Integrated DS1811-10+T&R

Overview

DS1811-10+T&R from Maxim Integrated (now Analog Devices) is a 5V precision voltage-monitoring supervisory IC with open-drain active-low reset output, 4.35V typical VCC trip point, 150ms reset timeout, and -40°C to +85°C operation. It automatically asserts reset during power failure and holds reset active for stabilization in microprocessor-based embedded systems.

For engineers reviewing the DS1811-10+T&R datasheet, DS1811-10+T&R pinout, DS1811-10+T&R application, or DS1811-10+T&R equivalent, key selection factors include trip voltage tolerance (±10%), internal 5.5kΩ pull-up resistor, open-drain RST output compatibility with 3.3V/5V logic, and TO-92/SOT-23 package options for space-constrained PCB layouts.

Technical Context

The DS1811-10+T&R implements a temperature-compensated bandgap reference and comparator to detect VCC deviations beyond its factory-trimmed 4.25V–4.49V trip window. Its internal timing circuit ensures reset remains asserted for 100–300ms after VCC recovery, independent of external components.

It operates across 1.2V–5.5V supply range with only 30–40μA quiescent current and supports open-drain interfacing without requiring an external pull-up resistor-enabled by its integrated 3.5–7.5kΩ internal pull-up.

Key Specifications

Pinout & Package

DS1811-10+T&R is available in SOT-23 (3-pin) and TO-92 (3-pin) packages. Both share identical pin mapping: Pin 1 = RST (active-low open-drain reset output), Pin 2 = VCC (power supply input), Pin 3 = GND (ground reference).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-monitoring reset applications.

Compared with MAX6326–43D and TPS3808G15DBVR, the DS1811-10+T&R offers unique value in cost-sensitive industrial designs needing both TO-92 and SOT-23 options, factory-trimmed ±10% trip accuracy without external components, and proven reliability in long-lifecycle embedded deployments.

Availability

DS1811-10+T&R is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, and point-of-sale terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for DS1811-10+T&R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The DS1811-10+T&R belongs to Maxim's EconoReset™ family-engineered for cost-effective, single-chip power-supply supervision in resource-constrained embedded systems where reliability and minimal external components are critical.

FAQ

What is the exact VCC trip voltage range for DS1811-10+T&R?

The DS1811-10+T&R has a guaranteed VCC trip point range of 4.25V (minimum), 4.35V (typical), and 4.49V (maximum) at -40°C to +85°C. This ±10% tolerance around 4.35V is factory-trimmed and temperature-compensated, ensuring consistent brown-out detection without external calibration. The DS1811-10+T&R datasheet specifies these values under DC Electrical Characteristics with note 1 referencing the 10% tolerance code "B" in the marking scheme.

Does DS1811-10+T&R require an external pull-up resistor on the RST pin?

No, DS1811-10+T&R includes an internal pull-up resistor ranging from 3.5kΩ to 7.5kΩ, eliminating the need for an external pull-up in standard 3.3V or 5V microcontroller reset interfaces. An external 1kΩ resistor may be added only in cases requiring faster rise time or driving high-capacitance buses-per Note 3 in the DS1811-10+T&R datasheet. The DS1811-10+T&R open-drain output remains fully functional with its internal pull-up across its specified operating conditions.

Can DS1811-10+T&R operate with supply voltages below 5V?

Yes, DS1811-10+T&R operates from 1.2V to 5.5V, making it compatible with 3.3V, 2.5V, and even 1.8V logic domains when used as a supervisor for lower-voltage processors-provided the monitored VCC rail matches its 4.25V–4.49V trip window. Its internal reference remains stable down to 1.2V, and the DS1811-10+T&R maintains full reset timing accuracy (100–300ms) across this entire supply range, as confirmed in the Recommended DC Operating Conditions table.

What is the reset timeout duration of DS1811-10+T&R and how is it controlled?

The DS1811-10+T&R guarantees a reset timeout of 100ms (minimum), 150ms (typical), and 300ms (maximum) after VCC returns to tolerance. This timing is generated by an internal RC oscillator and requires no external components. The DS1811-10+T&R uses this fixed-duration assertion to ensure microprocessor and power supply stabilization before releasing reset-fully documented in the AC Electrical Characteristics table under parameter tRST and tRPU.

Which packages are available for DS1811-10+T&R and are their pinouts identical?

DS1811-10+T&R is offered in both SOT-23 and TO-92 packages, and both share identical 3-pin mapping: Pin 1 = RST (active-low open-drain), Pin 2 = VCC, Pin 3 = GND. Mechanical drawings confirm identical signal assignment despite differing footprints. The DS1811-10+T&R T&R (tape-and-reel) designation specifically applies to the SOT-23 variant, while TO-92 versions carry separate ordering codes-but functionally, pinout, timing, and electrical specs are fully interchangeable between packages.