Analog Devices Inc./Maxim Integrated DS1816-10+

Overview

DS1816-10+ 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% V_CC trip point tolerance (2.80–2.97 V), 150 ms reset pulse width, open-drain RST output with internal 5 kΩ pull-up, and operates from -40°C to +85°C in TO-92 or SOT-23 packages - used in embedded power monitoring and brownout protection.

For engineers reviewing the DS1816-10+ datasheet, DS1816-10+ pinout, DS1816-10+ application, or DS1816-10+ equivalent, key selection criteria include trip-point accuracy, reset timeout duration, open-drain drive capability, operating temperature range, and compatibility with 3V/3.3V microcontroller reset inputs.

Technical Context

The DS1816-10+ uses an internal temperature-compensated voltage reference and comparator to continuously monitor V_CC against a fixed 10% threshold (2.80–2.97 V). Upon detection of undervoltage, it asserts RST low immediately; after V_CC recovers, it holds RST active for 100–250 ms (typ. 150 ms) to ensure system stabilization.

Its open-drain RST output supports wired-OR configurations and interfaces directly with microcontrollers requiring active-low reset. The internal 3.5–7.5 kΩ pull-up resistor eliminates external components in many designs, while ICC remains ≤35 µA across full operating range.

Key Specifications

Pinout & Package

DS1816-10+ is available in both TO-92 and SOT-23 packages. Both variants share identical pin assignment: Pin 1 = RST (active-low open-drain reset output), Pin 2 = V_CC (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 MAX809TRD2+T and TPS3808G12DBVR, the DS1816-10+ offers fixed 10% trip tolerance optimized for 3V systems, integrated pull-up, and minimal footprint - making it ideal for cost-sensitive, space-constrained brownout protection where ±0.18 V threshold variation is acceptable.

Availability

DS1816-10+ is available at Aetrix Electronics and suitable for industrial automation, smart metering, and embedded gateway applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across manufacturing lots.

Supply support for DS1816-10+ 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

Maxim Integrated, now part of Analog Devices, designs high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.

The DS1816-10+ belongs to the EconoReset™ family of supervisory circuits, engineered specifically for low-cost, reliable power-on reset and brownout protection in resource-constrained 3V microcontroller systems.

FAQ

What is the exact V_CC trip point range for DS1816-10+?

The DS1816-10+ has a guaranteed V_CC trip point range of 2.80 V to 2.97 V at -40°C to +85°C, corresponding to its 10% tolerance rating. This range is specified in the DC Electrical Characteristics table of the official datasheet and applies across the full operating temperature range without derating. The DS1816-10+ uses an internal temperature-compensated reference to maintain this accuracy.

Does DS1816-10+ require an external pull-up resistor on the RST pin?

The DS1816-10+ includes an internal pull-up resistor of 3.5–7.5 kΩ on the RST pin, eliminating the need for an external pull-up in most standard microcontroller interface applications. However, if the connected load draws more than ~0.5 mA during RST assertion or requires faster rise time, an external pull-up may be necessary - as noted in datasheet Note 3. The DS1816-10+ datasheet explicitly states "a 1k external pull-up resistor may be required in some applications."

Can DS1816-10+ operate with a 2.5V supply?

No, the DS1816-10+ is not specified to operate or monitor at 2.5V. Its 10% trip point is centered at 2.88 V (2.80–2.97 V), and the device requires V_CC ≥ 1.2 V to function - but valid reset assertion only occurs when V_CC crosses the defined threshold. For 2.5V systems, DS1816-20+ (2.47–2.64 V trip) is the appropriate variant. The DS1816-10+ will not assert reset reliably below 2.80 V.

What is the maximum sink current capability of the DS1816-10+ RST output?

The DS1816-10+ RST output can sink at least 10 mA when pulled to 0.4 V, as specified in the DC Electrical Characteristics table under "Output Current @ 0.4V (I_OL)". This ensures compatibility with standard CMOS and TTL reset inputs, including those with internal weak pull-ups. The DS1816-10+ maintains this drive strength across -40°C to +85°C and over its full supply range (1.2–5.5 V).

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

Yes, DS1816-10+, DS1816-5+, and DS1816-20+ are fully pin-compatible and share identical package options (TO-92 and SOT-23), pinout, electrical interface, and timing behavior. The only difference is the factory-trimmed V_CC trip point: 2.98–3.15 V (5%), 2.80–2.97 V (10%), or 2.47–2.64 V (20%). No PCB changes are required when substituting between these variants - the DS1816-10+ fits seamlessly into any layout designed for the DS1816 family.