Analog Devices Inc./Maxim Integrated DS1811-10

Overview

DS1811-10 from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset supervisor IC with open-drain output, designed to automatically restart microprocessors after power failure. It features a 4.25V–4.49V VCC trip point, 150ms minimum reset pulse width, and operates from -40°C to +85°C in TO-92 or SOT-23 packages - used in embedded microcontroller power sequencing and brownout protection.

For engineers reviewing the DS1811-10 datasheet, DS1811-10 pinout, DS1811-10 application, or DS1811-10 equivalent, key selection considerations include its guaranteed 150ms reset hold time after VCC recovery, internal 5.5kΩ pull-up resistor, ±10% trip tolerance, and compatibility with 1.2V–5.5V supply rails in space-constrained industrial control systems.

Technical Context

The DS1811-10 integrates a temperature-compensated bandgap reference and comparator to detect VCC deviations against its factory-trimmed 4.35V nominal trip threshold. Its internal timing circuit ensures RST remains active for ≥100ms (typ. 150ms, max 300ms) after VCC returns to tolerance.

It delivers an open-drain RST output capable of sinking ≥10mA at 0.4V, with no external pull-up required due to its integrated 3.5–7.5kΩ resistor. The device draws only 30–40μA quiescent current and supports VCC slew rates as slow as 300μs across the trip window.

Key Specifications

Pinout & Package

DS1811-10 is available in both TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) 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 MAX6326–43D and TPS3808G15, the DS1811-10 offers lowest BOM cost and smallest footprint for fixed 5V brownout detection, trading absolute accuracy for integration and ease-of-use in cost-sensitive industrial controllers.

Availability

DS1811-10 is available at Aetrix Electronics and suitable for industrial PLC controllers, smart meter power management, and embedded gateway boot sequencing requiring stable component supply and long-term lifecycle support.

Supply support for DS1811-10 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

Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The DS1811-10 belongs to Maxim's EconoReset family - engineered for cost-effective, single-supply voltage supervision in resource-constrained microcontroller systems where reliability and minimal external components are critical.

FAQ

What is the exact VCC trip voltage range for DS1811-10?

The DS1811-10 has a guaranteed VCC trip point ranging from 4.25V (minimum) to 4.49V (maximum), with a typical value of 4.35V. This ±10% tolerance is factory-trimmed and temperature-compensated, making it suitable for robust brownout detection in 5V systems without external calibration. The DS1811-10 specification strictly applies to this variant - other DS1811 suffixes (e.g., DS1811-5) have different trip thresholds.

Does DS1811-10 require an external pull-up resistor on the RST pin?

No, the DS1811-10 includes an internal pull-up resistor with a typical value of 5.5kΩ (range 3.5kΩ to 7.5kΩ), eliminating the need for an external component in most applications. It is designed to drive standard CMOS reset inputs directly. An external pull-up may be added only if driving high-capacitance nodes (>10pF) or interfacing with legacy processors requiring stronger pull-up strength - but the DS1811-10 itself functions fully without it.

How long does the DS1811-10 hold the RST signal active after VCC recovers?

The DS1811-10 holds the RST signal active for a minimum of 100ms and typically 150ms after VCC returns to within tolerance, with a maximum of 300ms. This guaranteed timeout ensures microprocessors and associated peripherals have sufficient time to stabilize before release. The timing is internally generated and independent of external capacitors - a key design feature of the DS1811-10 that simplifies layout and improves repeatability.

Can DS1811-10 operate with supply voltages below 3.3V?

Yes, the DS1811-10 operates across a wide VCC range of 1.2V to 5.5V, making it compatible with both modern low-voltage logic and legacy 5V systems. However, its 4.25V–4.49V trip point means it is intended for monitoring 5V rails - using it on sub-3.3V supplies would result in continuous reset assertion. For lower-voltage supervision, other members of the DS1811 family (e.g., DS1811-15) or alternative supervisors should be selected instead of the DS1811-10.

What package options are available for DS1811-10?

The DS1811-10 is offered in two industry-standard packages: TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount). Both share identical pinout (RST–VCC–GND), electrical specifications, and thermal performance. The TO-92 variant supports manual assembly and prototyping, while the SOT-23 enables high-density automated PCB assembly. No functional differences exist between the DS1811-10 packages - selection depends solely on manufacturing and mechanical requirements.