Analog Devices Inc./Maxim Integrated DS1816-10+T

Overview

DS1816-10+T 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 RST output with internal 5kΩ pull-up, and operates from -40°C to +85°C in SOT-23 package.

For engineers reviewing the DS1816-10+T datasheet, DS1816-10+T pinout, DS1816-10+T application, or DS1816-10+T equivalent, key selection criteria include trip voltage accuracy, reset timeout stability, open-drain drive capability, thermal range compliance, and compatibility with 3V/3.3V microcontroller reset circuits.

Technical Context

The DS1816-10+T uses an internal temperature-compensated voltage reference and comparator to continuously monitor VCC against a fixed 10% threshold. When VCC drops below 2.80V or rises above 2.97V, the RST output is asserted low within 2–5μs.

After VCC returns to tolerance, the device holds RST active for 100–250ms (typ. 150ms) to ensure power supply and processor stabilization. Its open-drain output supports flexible interface logic levels and allows wired-OR configuration with other reset sources.

Key Specifications

Pinout & Package

SOT-23-3 surface-mount package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, tape-and-reel delivery. Pin 1 = RST (active-low open-drain 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 supervision applications.

Compared with MAX6326–33D2T+ and TPS3808G12DBVR, the DS1816-10+T offers lower cost, simpler integration (no external components), and optimized 10% trip tolerance for legacy 3V designs - making it ideal where fixed-threshold simplicity and industrial temperature range outweigh programmability or sub-2% accuracy needs.

Availability

DS1816-10+T is available at Aetrix Electronics and suitable for industrial control panels, medical diagnostic devices, and smart metering systems requiring stable component supply and long-term lifecycle support.

Supply support for DS1816-10+T 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 high-performance analog and mixed-signal semiconductors for industrial, automotive, and communications applications.

The DS1816-10+T belongs to the EconoReset™ family of supervisory ICs, engineered specifically for cost-sensitive, space-constrained microprocessor reset applications in 3V systems with wide temperature operation.

FAQ

What is the exact VCC trip voltage range for DS1816-10+T?

The DS1816-10+T has a guaranteed VCC trip point range of 2.80V to 2.97V at -40°C to +85°C, corresponding to its 10% tolerance specification for nominal 3V operation. This range is defined by internal precision voltage reference and comparator circuitry, and does not require external calibration. The DS1816-10+T maintains this accuracy across its full operating temperature range without derating.

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

No, the DS1816-10+T integrates a 3.5–7.5kΩ internal pull-up resistor on the open-drain RST output, eliminating the need for external components in most applications. An external pull-up may be added only if system-level load capacitance exceeds 10pF or sink current demand exceeds 10mA - conditions rarely encountered in standard microcontroller reset interfaces using the DS1816-10+T.

Can DS1816-10+T be used with 1.8V or 2.5V microcontrollers?

Yes, the DS1816-10+T's open-drain RST output is compatible with 1.8V, 2.5V, and 3.3V logic families because it sinks current rather than sourcing voltage. However, its VCC trip point (2.80–2.97V) is fixed for 3V systems - so it should only monitor supplies within that range. The DS1816-10+T itself can operate from VCC = 1.2V to 5.5V, enabling use in mixed-voltage systems where reset signaling crosses voltage domains.

How does DS1816-10+T behave during power-down versus power-up?

During power-down, the DS1816-10+T asserts RST low within 2–5μs when VCC falls below 2.80V. During power-up, it holds RST low for 100–250ms (typ. 150ms) after VCC rises above 2.97V. This asymmetric timing ensures clean processor initialization regardless of ramp direction. The DS1816-10+T implements this behavior using internal timing circuitry independent of external components.

Is DS1816-10+T pin-compatible with other EconoReset variants like DS1816-5 or DS1816-20?

Yes, all DS1816 variants (including DS1816-5, DS1816-10+T, and DS1816-20) share identical SOT-23-3 pinout and package dimensions. They differ only in trip voltage tolerance (5%, 10%, or 20%) and corresponding VCC thresholds. This allows drop-in replacement across variants when system-level supply tolerance requirements change - no PCB layout modification is needed for the DS1816-10+T or its siblings.