Analog Devices Inc./Maxim Integrated DS1816R-10/T&R

Overview

DS1816R-10/T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset supervisor IC designed for microprocessor power-fail detection and reset assertion in 3V systems. It features a 10% VCC trip point (2.80–2.97V), 150ms guaranteed reset pulse width, open-drain RST output with internal 5kΩ pull-up, and operates from -40°C to +85°C in SOT-23 package.

For engineers reviewing the DS1816R-10/T&R datasheet, DS1816R-10/T&R pinout, DS1816R-10/T&R application, or DS1816R-10/T&R equivalent, key selection criteria include trip-point accuracy, reset timeout stability, open-drain drive capability, supply current (<35µA), and compatibility with 3V microcontroller reset inputs requiring active-low assertion.

Technical Context

The DS1816R-10/T&R integrates a temperature-compensated voltage reference and comparator to detect VCC deviations beyond ±10% of nominal 3V. Its internal circuitry asserts RST low on out-of-tolerance detection and holds it active for 100–250ms after VCC recovery, ensuring processor stabilization.

It uses an open-drain output stage with a factory-trimmed 3.5–7.5kΩ internal pull-up resistor, eliminating external components in many designs. The device draws only 28–35µA quiescent current and tolerates VCC from 0V to 5.5V, supporting brown-out detection across wide input transients.

Key Specifications

Pinout & Package

SOT-23-3 surface-mount package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, tape-and-reel format (T&R).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326–30D2T and TPS3808G12DBVR, the DS1816R-10/T&R offers optimal balance of 10% tolerance margin for 3V systems, integrated pull-up, and proven industrial temperature stability - making it ideal where cost, simplicity, and robustness outweigh ultra-low-I_CC or programmability needs.

Availability

DS1816R-10/T&R is available at Aetrix Electronics and suitable for industrial control, smart metering, and POS terminal applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature and voltage.

Supply support for DS1816R-10/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

Analog Devices (via acquisition of Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.

The DS1816R-10/T&R belongs to Maxim's EconoReset™ family of low-cost, precision reset supervisors - engineered specifically for cost-sensitive embedded systems needing reliable, single-supply voltage monitoring without external components.

FAQ

What is the exact VCC trip point range for DS1816R-10/T&R?

The DS1816R-10/T&R has a guaranteed VCC trip point range of 2.80V (minimum) to 2.97V (maximum) at 25°C, corresponding to ±10% of a nominal 3.0V supply. This range is maintained across the full -40°C to +85°C operating temperature with temperature compensation, ensuring consistent brown-out detection behavior in industrial environments.

Does DS1816R-10/T&R require an external pull-up resistor on the RST pin?

No, DS1816R-10/T&R includes an internal pull-up resistor of 3.5–7.5kΩ, sufficient for driving standard microcontroller reset inputs with ≤100pF load capacitance. An external pull-up is only needed if the connected device demands stronger high-level drive or higher capacitive loading beyond the internal resistor's capability.

What is the reset timeout duration of DS1816R-10/T&R after VCC recovery?

The DS1816R-10/T&R holds the RST pin active low for 100–250ms after VCC returns to within tolerance. The typical value is 150ms, and this delay is internally generated and independent of external components - ensuring predictable power-up sequencing for microprocessors and FPGAs.

Can DS1816R-10/T&R operate with a 5V supply?

Yes, DS1816R-10/T&R supports VCC from 0V to 5.5V and can monitor any supply within that range. However, its 10% trip point is calibrated for 3V systems (2.80–2.97V); using it on 5V rails would result in incorrect reset assertion unless paired with an external resistor divider to scale the monitored voltage.

Is DS1816R-10/T&R pin-compatible with other DS181x series devices?

Yes, all DS181x series supervisors (e.g., DS1813, DS1815, DS1816, DS1817) share identical SOT-23-3 pinout (RST-VCC-GND) and TO-92 pinout. DS1816R-10/T&R is functionally and physically interchangeable with other members of the family in the same package, differing only in trip-point tolerance (5%, 10%, 20%) and marking code.