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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 supervisory IC that provides active-high push-pull reset assertion during power failure or brownout events, with 4.35 V (typ) V_CC trip point, 150 ms (typ) reset timeout, and -40°C to +85°C operation - used for reliable microprocessor reset control in embedded power management systems.

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 considerations include trip voltage tolerance (±10%), active-high push-pull output drive capability (350 µA VOH @ 2.4 V), and SOT-23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The DS1812R-10+T&R integrates a temperature-compensated voltage reference and comparator to detect V_CC deviations below its factory-trimmed 4.25–4.49 V trip window. It asserts RST immediately on undervoltage detection and holds it active for 100–300 ms after V_CC recovery.

Its CMOS push-pull output drives logic-high directly without pull-up resistors, supports 1.2–5.5 V supply range, and draws only 30–40 µA quiescent current - enabling low-power always-on monitoring in battery-backed or energy-sensitive systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.25 V (min), 4.35 V (typ), 4.49 V (max) - defines precise undervoltage detection threshold for 5 V systems
Reset Timeout	100–300 ms - ensures stable processor startup after power recovery
Output Type	Push-pull active-high - eliminates external pull-up resistor and reduces BOM count
Supply Range	1.2 V to 5.5 V - supports wide-input monitoring across legacy and modern logic supplies
Quiescent Current	30–40 µA - enables continuous supervision without significant battery drain
Operating Temp	-40°C to +85°C - qualified for industrial-grade embedded environments
Output Drive	350 µA VOH @ 2.4 V - sufficient to directly interface with standard CMOS inputs

Pinout & Package

SOT-23-3 surface-mount package with 1.3 mm × 2.9 mm footprint and gull-wing leads; RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
1 (RST)	Active-high reset output	CMOS push-pull driver - sinks or sources current; no external pull-up required
2 (V_CC)	Power supply input	Monitored voltage rail; operates from 1.2 V to 5.5 V with internal reference bias
3 (GND)	Ground reference	Common return path for internal comparator and output stage; must be low-impedance

Key Features

Feature	Design Value
Precision voltage trip	Factory-trimmed ±10% tolerance (4.25–4.49 V) - eliminates need for external resistor divider calibration
Temperature compensation	Internal reference stable over -40°C to +85°C - maintains trip accuracy without external components
Reset timing control	Guaranteed 100–300 ms active reset pulse - ensures full system stabilization before release
Low-power operation	30–40 µA ICC - enables integration into always-on subsystems without compromising battery life
Small-footprint packaging	SOT-23-3 - saves >60% board area vs. TO-92; compatible with automated SMT assembly

Applications

Industrial PLC Controller	Smart Meter Power Management
Use Scenario: Maintains deterministic reset behavior during grid voltage sags or capacitor discharge events in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-high signal to ARM Cortex-M7 MCU upon V_CC drop below 4.25 V. Use Value: Prevents firmware corruption by guaranteeing ≥100 ms reset hold time after brownout recovery - meeting IEC 61000-4-11 immunity requirements.	Use Scenario: Ensures secure shutdown and restart sequencing when lithium backup battery voltage falls below critical threshold. IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset of metrology SoC before EEPROM write operations commence. Use Value: Eliminates need for discrete Zener + RC network - reducing component count by 4 parts while improving trip repeatability to ±10%.
Point-of-Sale Terminal	Network Router Power Sequencing
Use Scenario: Protects payment processing firmware during AC adapter disconnect or surge-induced rail collapse. IC Role / Device Role / Timing Role: Active-high reset supervisor interfacing directly with i.MX6UL application processor's POR# input. Use Value: Push-pull output drives processor reset pin without external pull-up - simplifying layout and eliminating risk of floating input during hot-swap events.	Use Scenario: Coordinates orderly power-up of multi-rail switch-mode power supply (3.3 V, 5 V, 12 V) in enterprise-grade routers. IC Role / Device Role / Timing Role: Primary V_CC monitor for 5 V main rail, generating synchronized reset pulse to FPGA configuration controller. Use Value: 150 ms typical timeout matches FPGA configuration clock stabilization window - preventing partial bitstream load failures.

Industrial PLC Controller

Smart Meter Power Management

Use Scenario: Maintains deterministic reset behavior during grid voltage sags or capacitor discharge events in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-high signal to ARM Cortex-M7 MCU upon V_CC drop below 4.25 V.

Use Value: Prevents firmware corruption by guaranteeing ≥100 ms reset hold time after brownout recovery - meeting IEC 61000-4-11 immunity requirements.

Use Scenario: Ensures secure shutdown and restart sequencing when lithium backup battery voltage falls below critical threshold.

IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset of metrology SoC before EEPROM write operations commence.

Use Value: Eliminates need for discrete Zener + RC network - reducing component count by 4 parts while improving trip repeatability to ±10%.

Point-of-Sale Terminal

Network Router Power Sequencing

Use Scenario: Protects payment processing firmware during AC adapter disconnect or surge-induced rail collapse.

IC Role / Device Role / Timing Role: Active-high reset supervisor interfacing directly with i.MX6UL application processor's POR# input.

Use Value: Push-pull output drives processor reset pin without external pull-up - simplifying layout and eliminating risk of floating input during hot-swap events.

Use Scenario: Coordinates orderly power-up of multi-rail switch-mode power supply (3.3 V, 5 V, 12 V) in enterprise-grade routers.

IC Role / Device Role / Timing Role: Primary V_CC monitor for 5 V main rail, generating synchronized reset pulse to FPGA configuration controller.

Use Value: 150 ms typical timeout matches FPGA configuration clock stabilization window - preventing partial bitstream load failures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G15DBVR	Adjustable trip via external resistor divider; 200 ms fixed timeout; open-drain output	Requires pull-up resistor and external components for threshold setting	Preferred when programmable trip voltage or multi-rail monitoring is needed
MAX809SEUR+T	Fixed 3.08 V trip; active-low open-drain output; 140 ms min timeout	Incompatible polarity and trip level for 5 V systems requiring active-high reset	Only suitable if redesign accommodates inverted logic and lower trip threshold

Compared with TPS3808G15DBVR and MAX809SEUR+T, the DS1812R-10+T&R delivers factory-trimmed 4.35 V trip with push-pull active-high output in a minimal 3-pin SOT-23 - reducing design effort for fixed 5 V reset supervision where simplicity and board area are critical.

Availability

DS1812R-10+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart meter power management, and point-of-sale terminals requiring stable component supply and long-term lifecycle support.

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) designs precision analog, mixed-signal, and power management ICs for industrial, computing, and communications applications.

The DS1812R-10+T&R belongs to the EconoReset™ family - engineered for cost-sensitive, high-volume embedded systems needing reliable, single-supply voltage supervision without external components.

FAQ

What is the exact V_CC trip voltage range for DS1812R-10+T&R?

The DS1812R-10+T&R has a guaranteed V_CC trip point of 4.25 V (minimum), 4.35 V (typical), and 4.49 V (maximum) at -40°C to +85°C. This ±10% tolerance is factory-trimmed and temperature-compensated, making it suitable for 5 V systems where precise brownout detection is required without external calibration components.

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 that actively drives both high and low states. Unlike open-drain reset supervisors, it does not require an external pull-up resistor - simplifying schematic design and reducing BOM count while ensuring robust logic-level compatibility with modern microprocessors.

What is the reset timeout duration of DS1812R-10+T&R after V_CC recovery?

The DS1812R-10+T&R holds the RST output active for 100–300 ms after V_CC returns to within tolerance. The typical value is 150 ms, providing sufficient time for power supply stabilization and microprocessor internal clock lock before releasing reset - critical for reliable boot sequence execution in embedded systems.

Can DS1812R-10+T&R operate from a 3.3 V supply?

Yes, the DS1812R-10+T&R supports supply voltages from 1.2 V to 5.5 V. However, its fixed 4.25–4.49 V trip point means it will assert reset whenever V_CC falls below that window - so it is intended for monitoring 5 V rails, not 3.3 V. For 3.3 V systems, a different variant (e.g., DS1812R-15) or alternative device would be appropriate.

What package type is used for DS1812R-10+T&R?

The DS1812R-10+T&R is supplied in the SOT-23-3 surface-mount package - a compact, gull-wing leaded package measuring 1.3 mm × 2.9 mm. It is RoHS-compliant and optimized for automated pick-and-place assembly, offering significant space savings compared to through-hole TO-92 alternatives while maintaining thermal and electrical performance.

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:: Active

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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