Analog Devices Inc./Maxim Integrated DS1813-15/T&R

Overview

DS1813-15/T&R from Maxim Integrated is a precision voltage-monitoring reset IC with pushbutton reset capability, designed for microprocessor supervision in 5V systems. It features a 4.13V typical VCC trip point (±15% tolerance), 150ms reset timeout, open-drain RST output with internal 5.5kΩ pullup, and operates from -40°C to +85°C. It is used in embedded controllers where reliable power-up/power-down sequencing and manual reset are required.

For engineers reviewing the DS1813-15/T&R datasheet, DS1813-15/T&R pinout, DS1813-15/T&R application, or DS1813-15/T&R equivalent, key selection criteria include trip voltage accuracy, reset timeout consistency, pushbutton debounce timing, open-drain drive strength, and SOT-23/TO-92 package compatibility with legacy board layouts.

Technical Context

The DS1813-15/T&R implements dual-path reset generation: one path monitors VCC against a precision temperature-compensated voltage reference (4.00–4.24V trip range) and asserts RST within 5µs of out-of-tolerance detection; the second path detects external pushbutton closure on the RST line and generates a 100–300ms reset pulse upon release. Both paths share the same open-drain output stage.

Its internal 5.5kΩ pullup resistor enables direct interface with standard CMOS inputs without external components, while its 30–40µA quiescent current supports low-power operation. The device requires no external capacitors or resistors to meet specified reset timing and voltage thresholds.

Key Specifications

Pinout & Package

DS1813-15/T&R is supplied in tape-and-reel SOT-23 package (3-pin, 1.6mm × 2.9mm footprint), compatible with automated assembly. Pin 1 = RST (active-low open-drain output), Pin 2 = VCC (power input), Pin 3 = GND (ground reference).

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 DS1813-15/T&R uniquely combines fixed 4.13V trip, integrated pushbutton support, and self-contained 150ms timing in a 3-pin SOT-23-reducing BOM count and layout complexity for cost-sensitive 5V microcontroller systems.

Availability

DS1813-15/T&R is available at Aetrix Electronics and suitable for industrial automation controllers, point-of-sale terminals, and smart metering systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DS1813-15/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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The DS1813-15/T&R belongs to Maxim's EconoReset family-engineered to replace discrete reset circuits with single-chip solutions offering guaranteed timing, voltage accuracy, and pushbutton integration for 5V embedded systems.

FAQ

What is the exact VCC trip voltage range for DS1813-15/T&R?

The DS1813-15/T&R has a guaranteed VCC trip point range of 4.00V (minimum) to 4.24V (maximum) at -40°C to +85°C, corresponding to its ±15% tolerance grade. This range ensures reset assertion occurs before common 5V microcontrollers drop below their minimum operating voltage, and the typical value is 4.13V. The DS1813-15/T&R uses an internal temperature-compensated reference to maintain this accuracy across its full operating temperature range.

Does DS1813-15/T&R require external components to function?

No, the DS1813-15/T&R operates autonomously with no external components required. Its internal 5.5kΩ pullup resistor enables direct connection to standard CMOS reset inputs, and its self-timed 150ms reset timeout eliminates the need for external capacitors. Only VCC, GND, and the target reset line must be connected-making the DS1813-15/T&R a true drop-in solution for reducing BOM count and layout area in 5V microcontroller systems.

How does DS1813-15/T&R handle pushbutton reset timing?

The DS1813-15/T&R detects any low pulse ≥1µs on the RST pin and responds by asserting an active-low reset for 100–300ms (typically 150ms) after the button is released. This timing is generated internally and does not depend on external RC networks. The DS1813-15/T&R thus provides deterministic, bounce-immune manual reset functionality-critical for field-deployed equipment where reliability of user-initiated recovery is essential.

Can DS1813-15/T&R be used with 3.3V microcontrollers?

The DS1813-15/T&R is optimized for 5V systems and specifies a 4.00–4.24V trip range, making it unsuitable for direct supervision of 3.3V microcontrollers whose reset thresholds are typically ≤1.0V. Using DS1813-15/T&R with a 3.3V rail would result in continuous reset assertion. For 3.3V applications, consider alternatives like MAX809SEUR+T (3.08V trip) or TPS3808G33DBVR (3.3V trip), both of which are explicitly rated for that voltage domain.

What package options are available for DS1813-15/T&R?

The DS1813-15/T&R is supplied exclusively in SOT-23-3 package in tape-and-reel format (designated by "/T&R" suffix), measuring 1.6mm × 2.9mm with standard gull-wing leads. While the DS1813 family also offers TO-92 packaging, the DS1813-15/T&R variant is qualified and distributed only in SOT-23 for surface-mount automation compatibility. Its pinout (RST-VCC-GND) matches industry-standard 3-pin supervisor IC layouts.