Analog Devices Inc./Maxim Integrated DS1813-10+T&R

Overview

DS1813-10+T&R from Maxim Integrated is a precision voltage-monitoring reset IC with pushbutton support, designed for microprocessor power-on and brownout supervision. It features a 4.25V to 4.49V VCC trip point (10% tolerance), 150ms reset timeout, open-drain RST output with internal 5.5kΩ pullup, and operates from -40°C to +85°C in SOT-23 package.

For engineers reviewing the DS1813-10+T&R datasheet, DS1813-10+T&R pinout, DS1813-10+T&R application, or DS1813-10+T&R equivalent, key selection criteria include reset threshold accuracy, pushbutton debounce timing, supply current (<40µA), open-drain drive capability (10mA sink), and compatibility with 1.2V–5.5V VCC rails.

Technical Context

The DS1813-10+T&R implements dual-reset supervision: first, precision temperature-compensated voltage detection triggers active-low reset when VCC falls below 4.25V (min) or rises above 4.49V (max); second, it detects external pushbutton assertion on the RST line and generates a clean 150ms reset pulse upon release. Both paths feed into a single open-drain output stage.

Its internal architecture integrates a bandgap reference, comparator with hysteresis, power-fail latch, and timing capacitor-free delay circuitry - eliminating external components while ensuring monotonic reset assertion during power-up, brownout, and manual override events.

Key Specifications

Pinout & Package

SOT-23 surface-mount package (3-pin, JEDEC MO-178AA), footprint-compatible with industry-standard reset supervisors and requiring no thermal pad or special layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G12DBVR, the DS1813-10+T&R uniquely combines factory-trimmed 4.35V supervision, integrated pushbutton handling, and ultra-low ICC in a 3-pin SOT-23 - making it optimal for cost-sensitive, space-constrained 5V microcontroller systems requiring both power and manual reset assurance.

Availability

DS1813-10+T&R is available at Aetrix Electronics and suitable for industrial control panels, smart metering platforms, and automotive body electronics requiring stable component supply and long-term production continuity.

Supply support for DS1813-10+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

Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and communications markets.

The DS1813-10+T&R belongs to Maxim's EconoReset family - engineered to replace discrete reset circuits with minimal footprint, zero external timing components, and guaranteed reset timing for reliable microprocessor startup and recovery.

FAQ

What is the exact VCC trip point range for DS1813-10+T&R?

The DS1813-10+T&R has a guaranteed VCC trip point range of 4.25V (minimum) to 4.49V (maximum) at 25°C, corresponding to a nominal 4.35V threshold with ±10% tolerance. This range is specified across the full operating temperature range (-40°C to +85°C) and is achieved using an internal temperature-compensated voltage reference. The DS1813-10+T&R does not require external resistors to set this threshold.

Does DS1813-10+T&R require an external pullup resistor on the RST pin?

No, the DS1813-10+T&R includes an internal pullup resistor of 3.5kΩ to 7.5kΩ (typical 5.5kΩ) on the open-drain RST output. This eliminates the need for an external pullup in most standard microcontroller reset configurations. However, if driving multiple loads or longer traces, an external pullup may still be used to improve rise time or noise immunity - but it is not mandatory for basic operation of the DS1813-10+T&R.

How does DS1813-10+T&R handle pushbutton reset timing?

The DS1813-10+T&R detects any low pulse ≥1µs on the RST pin and asserts reset immediately. Upon release, it holds RST low for 100–300ms (typical 150ms), independent of button press duration. This ensures clean de-bounced reset generation without external RC networks. The DS1813-10+T&R performs this function while simultaneously monitoring VCC, making it suitable for systems needing both automatic and manual reset assurance.

Can DS1813-10+T&R operate with supply voltages below 5V?

Yes, the DS1813-10+T&R supports VCC from 1.2V to 5.5V per its DC electrical specifications. However, its 4.25V–4.49V trip point means it is intended for 5V nominal systems. At VCC < 4.25V, the device remains in reset; at VCC > 4.49V, it releases reset after the 150ms timeout. For 3.3V or lower rails, a different variant (e.g., DS1813-33) or alternative part is required - the DS1813-10+T&R is not optimized for sub-4.25V operation.

What package type is supplied for DS1813-10+T&R?

The DS1813-10+T&R is supplied in the SOT-23 surface-mount package (3-pin, JEDEC MO-178AA), as confirmed by Maxim's official datasheet and packaging documentation. This compact, tape-and-reel format (denoted by "+T&R") is optimized for automated PCB assembly. The TO-92 through-hole variant exists for the DS1813 family but is not used for the DS1813-10+T&R ordering code.