Analog Devices Inc./Maxim Integrated DS1816-10/T&R

Overview

DS1816-10/T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring supervisory IC that provides active-low reset output for microprocessor systems. It features 10% VCC trip point tolerance (2.80V–2.97V), 150ms reset pulse width, open-drain output with internal 5kΩ pull-up, and operates from -40°C to +85°C in SOT-23 or TO-92 packages. Used in embedded controllers requiring reliable power-on reset and brownout detection.

For engineers reviewing the DS1816-10/T&R datasheet, DS1816-10/T&R pinout, DS1816-10/T&R application, or DS1816-10/T&R equivalent, key selection criteria include trip-point accuracy, reset timeout stability, open-drain drive capability, package compatibility with space-constrained PCBs, and temperature-compensated reference performance across industrial supply rails.

Technical Context

The DS1816-10/T&R implements a comparator-based power monitoring architecture using a precision temperature-compensated voltage reference to detect VCC deviations beyond ±10%. Its internal circuitry asserts RST low on out-of-tolerance conditions and holds it active for 100–250ms after VCC recovery.

It delivers deterministic reset timing without external RC components, supports 1.2V–5.5V supply range, and integrates an open-drain driver capable of sinking ≥10mA at 0.4V - enabling direct interface with microcontroller reset inputs requiring active-low assertion and external pull-up flexibility.

Key Specifications

Pinout & Package

DS1816-10/T&R is supplied in SOT-23 package (tape-and-reel), with identical 3-pin configuration to TO-92 variant: 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 MAX6326–33D and TPS3808G12DBVR, the DS1816-10/T&R provides optimal balance of cost, integration, and industrial-grade tolerance for 3.3V systems - delivering fixed ±10% trip accuracy, integrated pull-up, and ultra-low current without external components or programming overhead.

Availability

DS1816-10/T&R is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical sensor applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DS1816-10/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

Maxim Integrated (acquired by Analog Devices in 2021) designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets.

The DS1816-10/T&R belongs to Maxim's EconoReset™ family of supervisory circuits, engineered specifically for cost-sensitive, space-constrained microprocessor reset applications where high accuracy and minimal external components are critical.

FAQ

What is the exact VCC trip point range for DS1816-10/T&R?

The DS1816-10/T&R has a guaranteed VCC trip point range of 2.80V (minimum) to 2.97V (maximum) at -40°C to +85°C, corresponding to its ±10% tolerance specification for nominal 3.3V systems. This range is factory-trimmed and temperature-compensated, ensuring consistent brownout detection without external calibration. The DS1816-10/T&R maintains this accuracy across its full operating temperature range and supply voltage span (1.2V–5.5V).

Does DS1816-10/T&R require an external pull-up resistor on the RST pin?

No, the DS1816-10/T&R integrates an internal pull-up resistor of 3.5–7.5kΩ, eliminating the need for an external component in most 3.3V microcontroller interfaces. However, if the target MCU reset input requires a stronger pull-up (e.g., due to high leakage or long trace capacitance), a 1kΩ external resistor may be added per datasheet Note 3. The DS1816-10/T&R's open-drain output remains fully compatible with either configuration.

Can DS1816-10/T&R be used with 1.8V or 2.5V supply rails?

Yes, the DS1816-10/T&R operates from 1.2V to 5.5V and functions correctly on 1.8V and 2.5V rails, but its 2.80–2.97V trip point means it will not assert reset on those lower supplies unless they exceed its threshold - making it unsuitable as a primary supervisor for sub-3V systems. For such rails, DS1816-5 (2.98–3.15V) or DS1816-20 (2.47–2.64V) variants are more appropriate. The DS1816-10/T&R is optimized for 3.3V applications.

What is the reset timeout behavior of DS1816-10/T&R during power-up and power-down?

During power-up, the DS1816-10/T&R holds RST low for 100–250ms after VCC crosses its trip threshold (tRPU), ensuring processor stabilization. During power-down, RST is asserted within 2–5μs of VCC falling below the trip point (tRPD). Both timing parameters are specified across -40°C to +85°C and do not require external components. This deterministic behavior is intrinsic to the DS1816-10/T&R's internal architecture.

Is DS1816-10/T&R pin-compatible with other DS1816 variants like DS1816-5 or DS1816-20?

Yes, all DS1816 variants - including DS1816-5, DS1816-10/T&R, and DS1816-20 - share identical SOT-23 and TO-92 pinouts (RST/VCC/GND), same electrical interface, and identical timing characteristics except for trip voltage. They are functionally interchangeable at the board level when mechanical and thermal constraints allow; only the trip point differs. No PCB changes are required when substituting between DS1816 variants, provided the new trip threshold meets system requirements.