Analog Devices Inc./Maxim Integrated DS1813-5+

Overview

DS1813-5+ from Maxim Integrated is a precision 4.62V ±2.5% (5% total tolerance) voltage supervisor IC with pushbutton reset capability, open-drain active-low reset output, internal 5.5kΩ pullup resistor, and 150ms reset timeout. It monitors VCC for out-of-tolerance conditions and provides manual reset via external pushbutton, used in microcontroller power-up sequencing and brownout protection circuits.

For engineers reviewing the DS1813-5+ datasheet, DS1813-5+ pinout, DS1813-5+ application, or DS1813-5+ equivalent, key selection criteria include trip voltage accuracy (4.62V typ), reset timeout consistency (100–300ms), pushbutton debounce timing (1µs detect, 150ms hold), open-drain drive strength (10mA sink), and operation across -40°C to +85°C industrial temperature range.

Technical Context

The DS1813-5+ integrates a precision temperature-compensated voltage reference and comparator to detect VCC crossing its 4.62V threshold with ±2.5% tolerance. Its internal logic asserts RST low on both power-down (tRPD ≤ 5µs) and power-up (tRPU = 100–300ms), ensuring reliable processor reset timing independent of supply slew rate.

It supports dual reset triggers: automatic power-supply monitoring and manual pushbutton override. The RST pin serves as both output and input-lowing it for ≥1µs initiates a 150ms reset pulse upon release, while the internal 5.5kΩ pullup enables direct connection to microcontroller reset inputs without external components.

Key Specifications

Pinout & Package

DS1813-5+ is available in both TO-92 and SOT-23 packages. Both variants share identical 3-pin configuration and pin functions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G15DBVR, the DS1813-5+ uniquely integrates pushbutton reset sensing and internal pullup in a 3-pin package-reducing external components and enabling compact, cost-sensitive designs where manual and power-fail reset must coexist.

Availability

DS1813-5+ is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, automotive body control modules, and POS terminal power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for DS1813-5+ 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 precision analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DS1813-5+ belongs to Maxim's EconoReset™ family of low-cost, space-efficient voltage supervisors targeting cost-sensitive embedded systems needing reliable power-on reset and manual reset integration.

FAQ

What is the exact VCC trip voltage specification for DS1813-5+?

The DS1813-5+ has a nominal VCC trip voltage of 4.62V, with a total tolerance of ±2.5% (i.e., 4.50V to 4.75V). This is specified in the DC Electrical Characteristics table under "DS1813-5" row and "VCCTP" parameter. The "-5" suffix denotes the 5% total tolerance grade, and the DS1813-5+ is the surface-mount SOT-23 packaged version of that grade.

Does DS1813-5+ require an external pullup resistor on the RST pin?

No, DS1813-5+ does not require an external pullup resistor. It includes an internal 5.5kΩ pullup resistor on the RST pin, enabling direct connection to standard CMOS microcontroller reset inputs. This feature reduces BOM count and simplifies layout-confirmed in the "Efficient Open-Drain Output with Internal 5.5kΩ Pullup Resistor" feature list and DC Electrical Characteristics table.

How does DS1813-5+ handle pushbutton reset timing?

DS1813-5+ detects a pushbutton press when RST is pulled low for ≥1µs, then holds RST low for 100–300ms (typically 150ms) after release. This timing is specified as "tPBRST" in the AC Electrical Characteristics table. The 1µs minimum pulse width rejects mechanical switch bounce, and the fixed timeout eliminates need for external RC networks-key behavior documented in the "OPERATION-PUSHBUTTON RESET" section.

What is the operating current consumption of DS1813-5+?

The DS1813-5+ consumes 30–40µA of quiescent current when VCC is within specification and no reset is active. This value is measured with RST output open and specified in the "RECOMMENDED DC OPERATING CONDITIONS" table under "ICC". Low current draw makes DS1813-5+ suitable for battery-backed or always-on supervisory applications.

Can DS1813-5+ be used with 3.3V microcontrollers?

Yes, DS1813-5+ supports 3.3V systems: its VCC operating range is 1.2V to 5.5V, and its RST output is open-drain with internal 5.5kΩ pullup-compatible with 3.3V logic levels when pulled to 3.3V externally or interfaced via level-shifting. However, its 4.62V trip point targets 5V rails; for 3.3V supervision, DS1813-33+ (3.08V trip) is the appropriate variant.