Analog Devices Inc./Maxim Integrated DS1810-5

Overview

DS1810-5 from Maxim Integrated (now part of Analog Devices) is a precision voltage supervisor IC with push-pull active-low reset output, designed to monitor 5V power supplies. It asserts reset when VCC drops below 4.50–4.75V, holds reset active for 100–300ms after VCC recovery, and operates from -40°C to +85°C in TO-92 or SOT-23 packages - used in microprocessor power-up sequencing and brown-out protection.

For engineers reviewing the DS1810-5 datasheet, DS1810-5 pinout, DS1810-5 application, or DS1810-5 equivalent, key selection criteria include its 4.62V typical trip point, 150ms reset timeout, push-pull output capable of sinking 10mA, operation down to 1.2V supply, and compatibility with 5V embedded systems requiring reliable power-on reset and fail-safe restart.

Technical Context

The DS1810-5 integrates a temperature-compensated bandgap reference and comparator to detect VCC deviations against a fixed threshold. Its internal timing circuit ensures reset remains asserted for ≥100ms after VCC returns within tolerance, preventing premature processor release during supply instability.

Unlike open-drain supervisors, the DS1810-5 uses a push-pull output stage that actively drives high or low without external pull-up, enabling direct interface with CMOS inputs and reducing BOM count. Output remains valid down to VCC = 1.2V, and with an external 100kΩ pull-down, RST stays valid even as VCC approaches 0V during power-down.

Key Specifications

Pinout & Package

DS1810-5 is available in both TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Both share identical pin functions and electrical behavior.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX691ACSA+ and TPS3808G33DBVR, the DS1810-5 offers lowest BOM cost and minimal footprint for dedicated 5V power monitoring, with no added complexity - ideal where only precise trip point and fixed 150ms reset hold are required.

Availability

DS1810-5 is available at Aetrix Electronics and suitable for microcontroller power-on reset, industrial PLC power monitoring, and embedded metering systems requiring stable component supply across long production lifecycles.

Supply support for DS1810-5 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 (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The DS1810-5 belongs to Maxim's EconoReset family - low-cost, single-function voltage supervisors targeting cost-sensitive embedded systems needing reliable, minimal-footprint power monitoring without extra features like watchdogs or manual reset.

FAQ

What is the exact VCC trip point specification for DS1810-5?

The DS1810-5 has a guaranteed VCC trip point of 4.50V minimum, 4.62V typical, and 4.75V maximum at -40°C to +85°C. This 5% tolerance window is factory-trimmed and temperature-compensated using an internal bandgap reference, ensuring consistent 5V rail monitoring across operating conditions. The DS1810-5 datasheet specifies this parameter as VCCTP under DC Electrical Characteristics.

Does DS1810-5 require an external pull-up resistor on the RST pin?

No, the DS1810-5 does not require an external pull-up resistor because it features a push-pull output stage that actively drives both high and low states. This eliminates the need for external components and simplifies design. The DS1810-5 RST pin can source up to 350µA and sink up to 10mA, making it directly compatible with standard CMOS inputs without additional biasing.

Can DS1810-5 operate with supply voltages below 5V?

Yes, the DS1810-5 operates over a supply range of 1.2V to 5.5V. Its internal circuitry remains functional and produces valid reset assertions down to 1.2V. With an external 100kΩ resistor from RST to GND, the DS1810-5 maintains a defined logic state even as VCC approaches 0V - a key capability for fail-safe shutdown sequencing not found in many competing supervisors.

What is the reset timeout duration of DS1810-5 and how is it determined?

The DS1810-5 guarantees a reset timeout of 100ms minimum and 300ms maximum after VCC returns to tolerance, with 150ms typical. This delay is generated by an internal RC timing circuit and is independent of external components. It ensures sufficient stabilization time for both the 5V power supply and connected microprocessor before releasing the active-low reset signal - a fixed, factory-characterized parameter of the DS1810-5.

Which packages are offered for DS1810-5 and are their pinouts identical?

The DS1810-5 is offered in both TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Their pinouts are electrically and functionally identical: Pin 1 = RST (active-low output), Pin 2 = VCC (supply input), Pin 3 = GND (ground). Mechanical drawings confirm identical terminal assignments, allowing direct substitution between packages without layout changes - a key advantage of the DS1810-5 family.