Analog Devices Inc./Maxim Integrated DS1810R-15+T&R

Overview

DS1810R-15+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 V_CC returns to tolerance, features a 4.00–4.24 V trip point (±15% tolerance), operates from 1.2 V to 5.5 V, and supports -40°C to +85°C industrial temperature range - used in embedded power-up sequencing and brownout protection.

For engineers reviewing the DS1810R-15+T&R datasheet, DS1810R-15+T&R pinout, DS1810R-15+T&R application, or DS1810R-15+T&R equivalent, key selection criteria include guaranteed 150 ms reset timeout, ±15% V_CC trip accuracy, push-pull RST output capable of valid logic down to 0 V V_CC, low 40 µA operating current, and SOT-23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The DS1810R-15+T&R integrates a temperature-compensated voltage reference and comparator to detect V_CC deviations against its factory-trimmed 4.12 V nominal trip point (4.00–4.24 V range). Its internal timing circuit ensures minimum 100 ms and maximum 300 ms reset assertion after power recovery, with typical 150 ms duration.

Unlike open-drain reset supervisors, the DS1810R-15+T&R uses a push-pull output stage that actively drives RST high or low without external pull-up, enabling valid logic states even as V_CC drops below 1.2 V - supported by optional 100 kΩ RST-to-GND resistor for full 0 V V_CC operation during power-down.

Key Specifications

Pinout & Package

SOT-23-3 surface-mount package with 1.3 mm × 2.9 mm footprint and 0.95 mm height; compatible with standard reflow processes and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326–42D3+T and TPS3808G33DBVR, the DS1810R-15+T&R uniquely delivers ±15% trip accuracy at 4.12 V with guaranteed 0 V RST validity using only one external resistor - making it optimal for cost-sensitive, space-constrained 5 V systems requiring fail-safe brownout response without design overhead.

Availability

DS1810R-15+T&R is available at Aetrix Electronics and suitable for industrial PLCs, smart meters, medical infusion pumps, and automotive body control modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for DS1810R-15+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 DS1810R-15+T&R belongs to Maxim's EconoReset™ family of low-cost, single-supply reset supervisors - engineered specifically for cost-driven embedded systems needing robust power-on reset and brownout protection without feature bloat.

FAQ

What is the exact V_CC trip point range for DS1810R-15+T&R?

The DS1810R-15+T&R has a factory-trimmed V_CC trip point ranging from 4.00 V to 4.24 V, corresponding to ±15% tolerance around the nominal 4.12 V threshold. This range is specified under recommended operating conditions (-40°C to +85°C, V_CC = 1.2 V to 5.5 V) and is validated per Maxim's production test flow. The DS1810R-15+T&R does not support user adjustment or external resistor programming of the trip point.

Does DS1810R-15+T&R require an external pull-up resistor on the RST pin?

No, the DS1810R-15+T&R features a push-pull output stage and does not require an external pull-up resistor. Its RST pin actively drives high or low depending on V_CC status. An external 100 kΩ resistor from RST to GND is optional and only needed if valid logic state must be maintained when V_CC drops below 1.2 V - a capability unique to the DS1810R-15+T&R among low-cost reset ICs.

What is the guaranteed reset timeout duration for DS1810R-15+T&R?

The DS1810R-15+T&R guarantees a reset timeout between 100 ms and 300 ms after V_CC returns to tolerance, with a typical value of 150 ms. This specification is tested across temperature and supply voltage extremes and ensures sufficient time for microprocessor clock stabilization and peripheral power settling. The DS1810R-15+T&R does not offer programmable or adjustable timeout.

Can DS1810R-15+T&R operate with supply voltages below 3.3 V?

Yes, the DS1810R-15+T&R operates from 1.2 V to 5.5 V, making it functional with 1.8 V, 2.5 V, and 3.3 V rails - provided the monitored V_CC is scaled appropriately (e.g., using a resistor divider) to match its 4.00–4.24 V trip window. Its internal reference and comparator remain accurate down to 1.2 V V_CC, and the DS1810R-15+T&R maintains RST validity even as V_CC approaches 0 V when configured with the optional pull-down resistor.

Is DS1810R-15+T&R pin-compatible with other DS1810 variants like DS1810R-10 or DS1810R-5?

Yes, all DS1810R-x variants (including DS1810R-5, DS1810R-10, and DS1810R-15) share identical SOT-23-3 pinout, package dimensions, and electrical interface - differing only in factory-trimmed V_CC trip point (4.50–4.75 V, 4.25–4.49 V, and 4.00–4.24 V respectively). The DS1810R-15+T&R can be substituted for other DS1810R-x parts on the same PCB without layout changes, provided the system's voltage margin requirements align with its ±15% trip tolerance.