Analog Devices Inc./Maxim Integrated DS1810R-10+T&R

Overview

DS1810R-10+T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset IC with push-pull output, designed to automatically restart microprocessors after power failure. It asserts an active-low reset for 150 ms after VCC returns to tolerance, features a 4.25 V to 4.49 V trip point, operates from 1.2 V to 5.5 V, and supports -40°C to +85°C industrial temperature range.

For engineers reviewing the DS1810R-10+T&R datasheet, DS1810R-10+T&R pinout, DS1810R-10+T&R application, or DS1810R-10+T&R equivalent, key selection criteria include guaranteed reset pulse width, precise VCC trip threshold tolerance (±10%), push-pull output drive capability, low ICC (≤40 µA), and valid RST operation down to VCC = 1.2 V - critical for brown-out detection in embedded control systems.

Technical Context

The DS1810R-10+T&R implements a precision temperature-compensated voltage reference and comparator to monitor VCC against a fixed threshold. Its internal circuitry generates a power-fail signal when VCC falls below the selected trip point (4.37 V typical), forcing RST low.

Upon VCC recovery, the device holds RST active for 150 ms (min 100 ms, max 300 ms) to ensure system stabilization. The push-pull output drives high without external pull-up, sinks up to 10 mA at 0.4 V, and sources 350 µA at 2.4 V - enabling direct interface with CMOS inputs across supply voltages from 1.2 V to 5.5 V.

Key Specifications

Pinout & Package

SOT-23-3 surface-mount package with 1.3 mm × 2.9 mm footprint and gull-wing leads. RoHS-compliant, tape-and-reel format (T&R).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with MAX6326UR29+T and TPS3808G12DBVR, the DS1810R-10+T&R delivers a factory-trimmed 4.37 V trip point with push-pull output in SOT-23-3 - reducing design effort, component count, and PCB area for fixed 5 V rail supervision where ±10% tolerance is acceptable.

Availability

DS1810R-10+T&R is available at Aetrix Electronics and suitable for industrial automation, smart metering, and embedded control applications requiring stable component supply, long-lifecycle support, and guaranteed reset timing behavior.

Supply support for DS1810R-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 reliability-critical systems.

The DS1810R-10+T&R belongs to Maxim's EconoReset family - engineered for cost-sensitive, space-constrained embedded systems needing dependable power-on and brown-out reset functionality without external components.

FAQ

What is the exact VCC trip voltage range for DS1810R-10+T&R?

The DS1810R-10+T&R has a guaranteed VCC trip point range of 4.25 V (minimum) to 4.49 V (maximum), with 4.37 V typical. This ±10% tolerance is factory-trimmed and tested across -40°C to +85°C, making DS1810R-10+T&R suitable for 5 V rail supervision where precise brown-out detection is required without external adjustment.

Does DS1810R-10+T&R require an external pull-up resistor on the RST pin?

No, DS1810R-10+T&R uses a push-pull output structure that actively drives both high and low states. Unlike open-drain supervisors, DS1810R-10+T&R eliminates the need for an external pull-up resistor - reducing BOM count, saving PCB area, and simplifying layout while maintaining full compatibility with standard CMOS reset inputs.

Can DS1810R-10+T&R operate reliably below 1.2 V VCC?

No - DS1810R-10+T&R guarantees valid RST output only down to VCC = 1.2 V per datasheet specifications. Below that, output behavior is undefined. However, with an external 100 kΩ pull-down from RST to GND, DS1810R-10+T&R can maintain a valid low state even as VCC approaches 0 V during power-down, enabling fail-safe reset assertion.

What is the reset timeout duration of DS1810R-10+T&R after VCC recovery?

The DS1810R-10+T&R holds RST active for 100 ms (minimum) to 300 ms (maximum) after VCC returns to tolerance, with 150 ms typical. This guaranteed pulse width ensures microprocessors and associated peripherals have sufficient time to stabilize before release - a critical timing parameter explicitly defined in DS1810R-10+T&R's AC electrical characteristics table.

Is DS1810R-10+T&R compatible with TO-92 and SOT-23 packages interchangeably?

No - DS1810R-10+T&R is specifically the SOT-23-3 tape-and-reel variant. While the DS1810 family includes TO-92 versions (e.g., DS1810R-10+), the "+T&R" suffix denotes SOT-23 packaging. Pinout is identical (RST-VCC-GND), but thermal performance, board area, and assembly process differ; substitution requires validation of mechanical fit and reflow profile.