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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated DS1812R-10/T&R

Name: DS1812R-10/T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1812R-10/T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1812R-10/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: DS1812R-10/T&R.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

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Product details

Overview

DS1812R-10/T&R from Maxim Integrated is a precision voltage-monitoring reset IC with active-high push-pull output, designed to automatically restart microprocessors after power failure. It asserts reset for 150 ms after V_CC returns to tolerance, features a 4.25–4.49 V trip point (±10%), operates from -40°C to +85°C, and is housed in SOT-23 package - used in embedded power supervision circuits.

For engineers reviewing the DS1812R-10/T&R datasheet, DS1812R-10/T&R pinout, DS1812R-10/T&R application, or DS1812R-10/T&R equivalent, key selection criteria include reset timeout accuracy, V_CC trip threshold tolerance, push-pull drive capability, operating temperature range, and SOT-23 footprint compatibility with space-constrained PCB layouts.

Technical Context

The DS1812R-10/T&R implements a precision temperature-compensated voltage reference and comparator to detect V_CC out-of-tolerance conditions. Its internal circuitry generates a power-fail signal that forces RST high, and maintains that state for 100–300 ms after V_CC recovers - with typical 150 ms duration.

It delivers push-pull active-high output capable of sourcing 350 µA at 2.4 V and sinking +10 mA at 0.4 V, while drawing only 30–40 µA quiescent current across 1.2–5.5 V supply range - enabling reliable reset assertion without external pull-up components.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.25 V (min) to 4.49 V (max); precise threshold for 5 V systems with ±10% tolerance
Reset Timeout (t_RST)	100–300 ms; ensures stable power and processor initialization before release
Output Type	Push-pull active-high; eliminates need for external pull-up resistor
Supply Range	1.2 V to 5.5 V; supports wide-input operation including low-voltage microcontrollers
Quiescent Current (I_CC)	30–40 µA; ultra-low power consumption for battery-backed or energy-sensitive designs
Operating Temp	-40°C to +85°C; qualified for industrial-grade embedded environments
Output Drive	Sinks +10 mA at 0.4 V; sufficient to directly drive TTL/CMOS inputs without buffering

Pinout & Package

DS1812R-10/T&R is supplied in SOT-23 surface-mount package (3-pin, 1.3 mm × 2.9 mm footprint), optimized for automated assembly and space-constrained applications.

Pin/Terminal	Circuit Role	Design Meaning
1 (RST)	Active-high reset output	Push-pull CMOS output; drives high during reset, low otherwise - no external pull-up required
2 (V_CC)	Power supply input	Accepts 1.2–5.5 V; powers internal reference, comparator, and output stage
3 (GND)	Ground reference	Return path for all internal circuitry and output current; must be low-impedance connection

Key Features

Feature	Design Value
Precision voltage monitoring	Temperature-compensated reference enables ±1% trip point stability over full temperature range
Guaranteed reset timing	100–300 ms active reset window ensures robust power-up sequencing for microcontrollers
No external components needed	Integrated push-pull output eliminates pull-up resistor, reducing BOM count and board area
Low-power operation	30–40 µA supply current allows use in always-on supervisory circuits without significant battery drain
Industrial temperature range	-40°C to +85°C rating supports deployment in harsh environments including factory automation and remote sensors

Applications

Microcontroller Power-Up Sequencing	Industrial Sensor Node Supervision
Use Scenario: Microcontroller-based control system powers up from unregulated supply with slow-rising V_CC. IC Role / Device Role / Timing Role: DS1812R-10/T&R monitors V_CC, holds RST active until stable, then releases after 150 ms. Use Value: Prevents erratic boot behavior by ensuring clock, memory, and peripherals are fully powered before firmware execution begins.	Use Scenario: Battery-powered environmental sensor node must survive brownout events and recover autonomously. IC Role / Device Role / Timing Role: DS1812R-10/T&R detects V_CC dip below 4.25 V and asserts reset; maintains it for ≥100 ms upon recovery. Use Value: Enables deterministic restart after transient supply sag, avoiding corrupted sensor readings or stuck firmware states.
Embedded Communication Module Reset	Programmable Logic Controller (PLC) Input Stage
Use Scenario: RS-485 communication module integrates with host MCU and requires clean reset on power application. IC Role / Device Role / Timing Role: DS1812R-10/T&R provides active-high reset synchronized to local 5 V rail, compatible with standard logic-level reset inputs. Use Value: Eliminates need for RC-based reset generators, improving timing repeatability and reducing component variation impact.	Use Scenario: PLC digital input card uses isolated power rails and must guarantee safe startup under varying field supply conditions. IC Role / Device Role / Timing Role: DS1812R-10/T&R supervises primary 5 V logic rail and drives reset line to FPGA/CPLD configuration logic. Use Value: Ensures FPGA configures only after stable V_CC, preventing partial or invalid bitstream loading due to premature release.

Microcontroller Power-Up Sequencing

Industrial Sensor Node Supervision

Use Scenario: Microcontroller-based control system powers up from unregulated supply with slow-rising V_CC.

IC Role / Device Role / Timing Role: DS1812R-10/T&R monitors V_CC, holds RST active until stable, then releases after 150 ms.

Use Value: Prevents erratic boot behavior by ensuring clock, memory, and peripherals are fully powered before firmware execution begins.

Use Scenario: Battery-powered environmental sensor node must survive brownout events and recover autonomously.

IC Role / Device Role / Timing Role: DS1812R-10/T&R detects V_CC dip below 4.25 V and asserts reset; maintains it for ≥100 ms upon recovery.

Use Value: Enables deterministic restart after transient supply sag, avoiding corrupted sensor readings or stuck firmware states.

Embedded Communication Module Reset

Programmable Logic Controller (PLC) Input Stage

Use Scenario: RS-485 communication module integrates with host MCU and requires clean reset on power application.

IC Role / Device Role / Timing Role: DS1812R-10/T&R provides active-high reset synchronized to local 5 V rail, compatible with standard logic-level reset inputs.

Use Value: Eliminates need for RC-based reset generators, improving timing repeatability and reducing component variation impact.

Use Scenario: PLC digital input card uses isolated power rails and must guarantee safe startup under varying field supply conditions.

IC Role / Device Role / Timing Role: DS1812R-10/T&R supervises primary 5 V logic rail and drives reset line to FPGA/CPLD configuration logic.

Use Value: Ensures FPGA configures only after stable V_CC, preventing partial or invalid bitstream loading due to premature release.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-monitoring reset applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326UT46D3+T	4.63 V fixed trip point; open-drain output; requires external pull-up	Higher trip threshold; less tolerant of 5 V rail droop; adds BOM item	Choose when tighter 4.63 V threshold is required and board layout accommodates pull-up resistor
TPS3808G15DBVR	1.5 V adjustable trip via external resistor divider; push-pull output; 200 ms default timeout	Configurable threshold enables adaptation to non-5 V systems; longer default timeout may delay boot	Choose when design requires flexible trip point or operates outside 5 V domain

Compared with MAX6326UT46D3+T and TPS3808G15DBVR, the DS1812R-10/T&R offers fixed ±10% 5 V supervision with guaranteed 150 ms reset hold time and zero-external-component push-pull output - simplifying design for cost-sensitive, space-constrained 5 V microcontroller applications.

Availability

DS1812R-10/T&R is available at Aetrix Electronics and suitable for industrial automation controllers, battery-powered sensor nodes, and embedded communication modules requiring stable component supply and long-term manufacturability.

Supply support for DS1812R-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 (now part of Analog Devices) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DS1812R-10/T&R belongs to Maxim's EconoReset™ family of supervisory circuits - engineered for low-cost, high-reliability power monitoring in resource-constrained embedded systems.

FAQ

What is the exact V_CC trip point range for DS1812R-10/T&R?

The DS1812R-10/T&R has a guaranteed V_CC trip point range of 4.25 V (minimum) to 4.49 V (maximum), corresponding to its "-10" designation indicating ±10% tolerance around a nominal 4.37 V threshold. This range is specified over the full -40°C to +85°C operating temperature and is achieved using an internal temperature-compensated voltage reference. The DS1812R-10/T&R maintains this accuracy without external calibration.

Does DS1812R-10/T&R require an external pull-up resistor on the RST pin?

No, the DS1812R-10/T&R features a push-pull active-high output stage, meaning it actively drives RST high during reset and low otherwise. Unlike open-drain reset ICs, it does not require an external pull-up resistor - reducing component count, board area, and potential timing variability. This design is confirmed in the device's pin assignment and electrical characteristics table, where VOH and IOL are explicitly specified.

What is the reset timeout duration of DS1812R-10/T&R, and is it adjustable?

The DS1812R-10/T&R provides a fixed reset timeout of 100–300 ms, with a typical value of 150 ms after V_CC returns to tolerance. This timing is internally generated and not user-adjustable via external components. It is designed to allow sufficient stabilization time for both the power supply and connected microprocessor before releasing reset. The DS1812R-10/T&R does not support external capacitor-based timeout adjustment.

Can DS1812R-10/T&R operate with supply voltages below 5 V?

Yes, the DS1812R-10/T&R operates across a supply range of 1.2 V to 5.5 V, as specified in its Recommended DC Operating Conditions. However, its 4.25–4.49 V trip point remains fixed - meaning it is intended for monitoring 5 V rails even when powered from lower voltages (e.g., via a separate bias rail). The DS1812R-10/T&R's internal reference and comparator remain functional down to 1.2 V, supporting use in multi-rail systems where supervision and supply domains are decoupled.

What package type is used for DS1812R-10/T&R, and is it RoHS-compliant?

The DS1812R-10/T&R is supplied in the SOT-23 package (3-pin, surface-mount), as indicated by the "/T&R" suffix denoting tape-and-reel packaging. This package measures 1.3 mm × 2.9 mm with standard lead pitch and is RoHS-compliant per Maxim Integrated's product documentation. The DS1812R-10/T&R's mechanical drawings and compliance status are published in Maxim's official datasheet revision history and packaging specification documents.

DS1812R-10/T&R Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: EconoReset

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.35V

Output:: Push-Pull, Totem Pole

Reset:: Active High

Reset Timeout:: 100ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

DS1812R-10/T&R FAQ

1.How can I place an order for DS1812R-10/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1812R-10/T&R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DS1812R-10/T&R reliable?

The price and inventory of DS1812R-10/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1812R-10/T&R is usually 5 days.

3.What payment methods are accepted for DS1812R-10/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1812R-10/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1812R-10/T&R?

DS1812R-10/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1812R-10/T&R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DS1812R-10/T&R?

For technical support, including DS1812R-10/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1812R-10/T&R requirements.

6.How does Aetrix verify that DS1812R-10/T&R is sourced from the original manufacturer or authorized distributors?

All DS1812R-10/T&R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1812R-10/T&R meets industry standards.

7.What is the process for return or replacement of DS1812R-10/T&R?

All DS1812R-10/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1812R-10/T&R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DS1812R-10/T&R part is unused and in its original packaging.

Return procedure for DS1812R-10/T&R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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