Analog Devices Inc./Maxim Integrated DS1810-10+T&R

Overview

DS1810-10+T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring supervisory IC that provides active-low reset signaling for microprocessors during power failure or brownout events. It features a 4.37 V nominal VCC trip point (±10% tolerance), 150 ms reset pulse width, push-pull output, and operates from 1.2 V to 5.5 V supply - used in embedded systems requiring reliable power-on reset and supply monitoring.

For engineers reviewing the DS1810-10+T&R datasheet, DS1810-10+T&R pinout, DS1810-10+T&R application, or DS1810-10+T&R equivalent, key selection criteria include trip voltage accuracy, reset timeout stability over temperature, push-pull drive capability, low ICC (40 µA max), and compatibility with 3.3 V/5 V logic domains in space-constrained SOT-23 designs.

Technical Context

The DS1810-10+T&R implements a precision bandgap voltage reference and comparator-based monitoring circuit to detect VCC deviations below its factory-trimmed 4.37 V threshold. Its internal timing circuit ensures a guaranteed 100–300 ms active-low reset assertion after power-up or recovery, independent of external components.

Unlike open-drain reset supervisors, the DS1810-10+T&R uses a push-pull output stage capable of sourcing up to 350 µA and sinking up to 10 mA - enabling direct interface with CMOS inputs without pull-up resistors and supporting valid RST signaling down to VCC = 0 V when externally biased via a 100 kΩ resistor to GND.

Key Specifications

Pinout & Package

SOT-23-3 surface-mount package (2.92 mm × 1.3 mm × 1.0 mm), lead-free and RoHS-compliant. Pin-compatible with TO-92 variant but optimized for automated assembly and PCB space savings.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT43D+ and TPS3808G15DBVR, the DS1810-10+T&R uniquely combines factory-trimmed 4.37 V trip accuracy, guaranteed 150 ms reset hold, and zero-VCC RST validity in a 3-pin SOT-23 - making it optimal for cost-sensitive, space-constrained 5 V microcontroller reset applications without design overhead.

Availability

DS1810-10+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, medical handheld diagnostics, and automotive body control modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for DS1810-10+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 high-performance analog, mixed-signal, and power management ICs for precision sensing, power integrity, and reliable system supervision.

The DS1810-10+T&R belongs to Maxim's EconoReset™ family - engineered for cost-effective, single-function power monitoring in resource-constrained embedded systems where simplicity, small footprint, and guaranteed reset timing are essential.

FAQ

What is the exact VCC trip voltage range for DS1810-10+T&R?

The DS1810-10+T&R has a factory-trimmed VCC trip point ranging from 4.25 V to 4.49 V (nominal 4.37 V) with ±10% tolerance. This specification is guaranteed over the full operating temperature range (-40°C to +85°C) and applies directly to the DS1810-10+T&R - no external calibration or adjustment is required to achieve this accuracy.

Does DS1810-10+T&R support operation below 1.2 V VCC?

Yes - while the DS1810-10+T&R functions normally down to 1.2 V VCC, its push-pull output can maintain a valid logic state even as VCC approaches 0 V when a 100 kΩ resistor is connected between RST and GND. This feature is explicitly documented for the DS1810-10+T&R and enables safe shutdown signaling during complete power collapse.

Is DS1810-10+T&R pin-compatible with other DS181x variants?

Yes - all DS181x series devices (including DS1810-5, DS1810-10, DS1810-15, DS1811, DS1812, etc.) share identical SOT-23-3 and TO-92 pinouts: Pin 1 = RST, Pin 2 = VCC, Pin 3 = GND. The DS1810-10+T&R may be substituted within the same package without PCB changes, provided trip voltage and timing requirements align.

What is the maximum sink current capability of DS1810-10+T&R's RST output?

The DS1810-10+T&R RST output can sink up to 10 mA at 0.4 V, as specified in its DC electrical characteristics table. This push-pull drive strength allows direct interfacing with standard CMOS microcontroller reset inputs without external pull-up resistors - a verified capability of the DS1810-10+T&R under all operating conditions.

How does DS1810-10+T&R ensure reset timing consistency across temperature?

The DS1810-10+T&R integrates a precision temperature-compensated voltage reference and internal timing circuit, guaranteeing reset pulse width between 100 ms and 300 ms across -40°C to +85°C. This thermal stability is inherent to the DS1810-10+T&R's monolithic design and requires no external compensation components.