Analog Devices Inc./Maxim Integrated DS1813-15+

Overview

DS1813-15+ 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. Used in embedded controllers where reliable power-up/power-down sequencing and manual reset are required.

For engineers reviewing the DS1813-15+ datasheet, DS1813-15+ pinout, DS1813-15+ application, or DS1813-15+ equivalent, key selection criteria include trip voltage accuracy (4.00–4.24V), reset timeout consistency (100–300ms), pushbutton debounce timing (150ms hold after release), and compatibility with 5V logic-level microcontrollers requiring active-low reset assertion.

Technical Context

The DS1813-15+ integrates a temperature-compensated voltage reference and comparator to detect VCC deviations beyond its factory-trimmed 4.13V threshold. Its internal power-fail detection circuit asserts RST within 2–5µs of out-of-tolerance detection, and maintains reset for 100–300ms after VCC recovery.

It supports dual reset initiation modes: automatic power-supply monitoring and external pushbutton override. When RST is pulled low for ≥1µs, the device generates a manual reset pulse held for 100–300ms post-release-enabling robust debounced reset without external RC networks.

Key Specifications

Pinout & Package

DS1813-15+ is available in both TO-92 and SOT-23 packages. Pin functions are identical across both variants: Pin 1 = RST (active-low open-drain reset output), Pin 2 = VCC (power supply 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 MAX6326–T41D+ and TPS3808G15DBVR, the DS1813-15+ uniquely combines factory-trimmed ±15% 4.13V detection, integrated pushbutton timing, and ultra-low 35µA typical ICC in a dual-package option-making it optimal for cost-sensitive, space-constrained 5V microcontroller supervision where manual reset is mandatory.

Availability

DS1813-15+ is available at Aetrix Electronics and suitable for industrial automation, smart energy metering, and point-of-sale terminal designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DS1813-15+ 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, automotive, and communications applications.

The DS1813-15+ belongs to Maxim's EconoReset family-engineered to replace discrete reset circuits in cost-sensitive 5V microcontroller systems while delivering reliable power-on reset, brownout protection, and pushbutton supervision.

FAQ

What is the exact VCC trip voltage range for DS1813-15+?

The DS1813-15+ has a guaranteed VCC trip point range of 4.00V to 4.24V at +25°C, corresponding to its ±15% tolerance grade. This range ensures reliable detection of 5V supply brownout conditions while accommodating manufacturing variation and temperature drift across the -40°C to +85°C operating range. The DS1813-15+ uses an internal temperature-compensated reference to maintain this accuracy without external calibration.

Does DS1813-15+ require an external pullup resistor on the RST pin?

No, the DS1813-15+ includes an internal 5.5kΩ pullup resistor on the RST pin, making external pullup unnecessary in standard 5V systems. This feature reduces BOM count and PCB area. However, if interfacing with 3.3V logic or driving heavy capacitive loads (>50pF), an external pullup may be needed to ensure proper VOH level and timing-verified per the DS1813-15+ datasheet's DC electrical characteristics.

How does DS1813-15+ handle pushbutton reset timing?

The DS1813-15+ detects a low-going edge on the RST pin lasting ≥1µs and responds by asserting reset for 100–300ms after the button is released. This built-in timing eliminates mechanical switch bounce without external RC components. The DS1813-15+ does not require sustained low state-only a brief pull-down-and guarantees minimum hold time even with noisy or slow-release buttons.

Can DS1813-15+ operate with supply voltages below 5V?

Yes, the DS1813-15+ functions across VCC = 1.2V to 5.5V, but its 4.13V trip point is optimized for 5V systems. Below ~4.3V, the trip point remains valid but margin shrinks; operation below 4.0V may result in undetected brownout. For sub-3.3V rails, consider alternatives like the DS1832 or TPS3808 series. The DS1813-15+'s specification table explicitly defines performance only for VCC ≥ 1.2V with full functionality above 4.0V.

Is DS1813-15+ pin-compatible with other DS181x variants?

Yes, all DS181x devices-including DS1813-5+, DS1813-10+, and DS1813-15+-share identical pinout (RST/VCC/GND), package dimensions, and electrical interface. Only the trip voltage tolerance differs: ±5%, ±10%, and ±15%. This allows direct substitution in existing layouts when recalibrating system brownout thresholds, provided the new tolerance meets design safety margins. The DS1813-15+ retains full functional compatibility with earlier DS1813 versions.