Analog Devices Inc./Maxim Integrated DS1813-10+

Overview

DS1813-10+ from Maxim Integrated is a precision voltage-monitoring reset IC with pushbutton support, designed to assert an active-low reset signal during VCC undervoltage (trip point 4.25V–4.49V) and after manual button release. It features 150ms reset timeout, internal 5.5kΩ pullup, open-drain output, and operates from -40°C to +85°C in SOT-23 or TO-92 packages. Used in microprocessor power-up stabilization and manual recovery circuits.

For engineers reviewing the DS1813-10+ datasheet, DS1813-10+ pinout, DS1813-10+ application, or DS1813-10+ equivalent, key selection criteria include trip voltage tolerance (±10%), reset timeout consistency (100–300ms), pushbutton debouncing behavior, open-drain drive capability (10mA sink), and compatibility with 1.2V–5.5V supply rails.

Technical Context

The DS1813-10+ integrates a temperature-compensated voltage reference and comparator to detect VCC deviations against its factory-trimmed 4.35V nominal trip point. Its internal logic ensures reset remains asserted for ≥100ms after VCC recovery and ≥100ms after pushbutton release-both timed independently of external components.

It uses an open-drain RST output with integrated 5.5kΩ pullup resistor, eliminating need for external biasing in standard 5V systems. The device responds to VCC slew rates as slow as 300µs across its trip window and detects pushbutton transitions with sub-microsecond latency (tPB = 1µs).

Key Specifications

Pinout & Package

DS1813-10+ is available in SOT-23 (3-pin) and TO-92 (3-pin) packages. Both share identical pin mapping and functional assignment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G15DBVR, the DS1813-10+ uniquely combines fixed 4.35V trip, pushbutton integration, and internal pullup in a 3-pin SOT-23-reducing component count and layout complexity for cost-constrained 5V microcontroller systems needing both power and manual reset functions.

Availability

DS1813-10+ is available at Aetrix Electronics and suitable for industrial control panels, embedded data loggers, and point-of-sale terminals requiring stable component supply and long-term obsolescence management.

Supply support for DS1813-10+ 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, computing, and communications applications.

The DS1813-10+ belongs to Maxim's EconoReset family-engineered to replace discrete reset solutions in cost-sensitive microcontroller systems with guaranteed timing, minimal footprint, and factory-trimmed accuracy.

FAQ

What is the exact VCC trip voltage range for DS1813-10+?

The DS1813-10+ has a guaranteed VCC trip point range of 4.25V (minimum) to 4.49V (maximum), with a typical value of 4.35V. This ±10% tolerance is factory-trimmed and temperature-compensated, ensuring consistent undervoltage detection across the full -40°C to +85°C operating range. The DS1813-10+ datasheet specifies these limits under DC electrical characteristics, and they apply regardless of package type (SOT-23 or TO-92).

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

No, the DS1813-10+ includes an internal 5.5kΩ pullup resistor on the RST pin, making external pullup unnecessary in standard 5V systems. This feature simplifies design and reduces BOM count. However, if interfacing with logic families requiring higher pullup strength or operating above 5.5V, an external resistor may be added-but the DS1813-10+ itself functions correctly without it in typical applications.

How does DS1813-10+ handle pushbutton reset timing?

The DS1813-10+ detects any low pulse ≥1µs on the RST pin and responds by asserting reset for 100–300ms (typically 150ms) after the button is released. This built-in timing eliminates need for external RC networks or firmware debouncing. The DS1813-10+ treats the RST pin as both output and input for this function-enabling single-wire pushbutton interface without additional pins or components.

Can DS1813-10+ operate with supply voltages below 3.3V?

Yes, the DS1813-10+ supports supply voltages from 1.2V to 5.5V per its recommended operating conditions. However, its 4.25V–4.49V trip point means it will not assert reset in sub-4.25V systems unless VCC rises into that window. For low-voltage rails (e.g., 3.3V or 1.8V), the DS1813-10+ remains powered and functional but cannot monitor those rails-use DS1813-xx variants with matching trip points or alternative supervisors like MAX6326 for lower thresholds.

What is the maximum sink current capability of DS1813-10+ RST output?

The DS1813-10+ RST output can sink up to 10mA while maintaining ≤0.4V at the pin, as specified in its DC electrical characteristics. This ensures reliable reset assertion into typical microcontroller reset inputs-even with moderate capacitive loading or longer PCB traces. The DS1813-10+ achieves this with robust internal MOSFET drive, eliminating need for external buffer transistors in most implementations.