Analog Devices Inc./Maxim Integrated DS1816-5

Overview

DS1816-5 from Maxim Integrated (now Analog Devices) is a precision 3.0V ±5% supply voltage supervisor IC with open-drain active-low reset output, 150ms reset timeout, and internal 5kΩ pull-up resistor. It monitors VCC in microprocessor systems, asserts RST during undervoltage, and holds reset for stabilization-used in embedded controllers requiring reliable power-on reset in industrial and automotive ECUs.

For engineers reviewing the DS1816-5 datasheet, DS1816-5 pinout, DS1816-5 application, or DS1816-5 equivalent, key selection criteria include trip point accuracy (2.98V–3.15V), guaranteed 100–250ms reset pulse width, -40°C to +85°C operation, TO-92/SOT-23 package options, and compatibility with 3V/3.3V logic interfaces.

Technical Context

The DS1816-5 implements a temperature-compensated bandgap reference and comparator to detect VCC deviations beyond ±5% of nominal 3.0V. Its internal hysteresis prevents chatter near threshold, and the 150ms reset timeout ensures microprocessor core and peripheral power rails stabilize before release.

It features an open-drain RST output with integrated 5kΩ pull-up, eliminating external components in many designs. The device draws only 28–35µA quiescent current and operates across full 1.2V–5.5V VCC range, supporting brown-out detection even during low-voltage battery backup conditions.

Key Specifications

Pinout & Package

DS1816-5 is available in TO-92 and SOT-23 packages. Both share identical 3-pin configuration and functional pin mapping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TLV803EB30DBZR and MAX6326UR31+T, the DS1816-5 offers broader VCC operating range (1.2V–5.5V), integrated pull-up, and ±5% trip tolerance optimized for cost-sensitive 3.3V systems where moderate accuracy suffices and layout simplicity is prioritized.

Availability

DS1816-5 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, medical infusion devices, and smart metering systems requiring stable component supply and long-term lifecycle support.

Supply support for DS1816-5 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 (acquired Maxim Integrated in 2021) designs high-performance analog, mixed-signal, and power management ICs for precision sensing, power integrity, and reliable system supervision.

The DS1816-5 belongs to Maxim's EconoReset™ family-engineered for cost-effective, single-supply voltage monitoring in resource-constrained embedded systems where simplicity, accuracy, and thermal stability are essential.

FAQ

What is the exact VCC trip point range for DS1816-5?

The DS1816-5 has a guaranteed VCC trip point range of 2.98V to 3.15V at -40°C to +85°C, corresponding to ±5% tolerance around a nominal 3.0V threshold. This specification is measured per the DC electrical characteristics table in the official DS1816 datasheet and applies directly to the DS1816-5 variant, not other members of the DS1816 family.

Does DS1816-5 require an external pull-up resistor on the RST pin?

No, DS1816-5 includes an internal 5kΩ pull-up resistor on the open-drain RST output. An external pull-up is only needed if the connected microcontroller's input leakage or bus capacitance exceeds the drive capability of the internal resistor-typically unnecessary for standard 3.3V GPIO interfaces. The DS1816-5 datasheet confirms this design eliminates discrete components in most implementations.

What is the minimum and maximum reset timeout duration for DS1816-5?

The DS1816-5 provides a reset timeout of 100ms minimum to 250ms maximum after VCC returns to tolerance. The typical value is 150ms, as specified in the AC Electrical Characteristics table. This timing is internally generated and independent of external components, ensuring consistent power-up sequencing across temperature and supply variations for the DS1816-5.

Can DS1816-5 operate with a 1.8V supply rail?

Yes, DS1816-5 supports VCC from 1.2V to 5.5V, so it functions correctly with a 1.8V supply. However, its trip point remains fixed at 2.98V–3.15V; therefore, it cannot supervise a 1.8V rail directly. It is intended to monitor 3.0V/3.3V supplies. For 1.8V supervision, a different variant (e.g., DS1816-20) or alternate supervisor must be used-DS1816-5 is not rated for sub-2.98V trip applications.

Is DS1816-5 pin-compatible with DS1816-10 or DS1816-20?

Yes, DS1816-5 is fully pin-compatible with DS1816-10 and DS1816-20-all share identical TO-92 and SOT-23 pinouts, electrical interface, and timing behavior. The only difference is the VCC trip point: DS1816-5 = 3.0V ±5%, DS1816-10 = 3.0V ±10%, DS1816-20 = 3.0V ±20%. This allows direct substitution in layouts where trip tolerance can be relaxed or tightened without PCB changes.