Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Analog Devices Inc./Maxim Integrated DS1819AR-10/T&R

Name: DS1819AR-10/T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1819AR-10/T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: DS1819AR-10/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: DS1819AR-10/T&R.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,252

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

DS1819AR-10/T&R from Maxim Integrated is a 3.3V microprocessor supervisory circuit in SOT-23-5 package, providing precision power monitoring (±10% V_CC trip at 2.85–3.00 V), watchdog timer (1.12 s timeout), and pushbutton reset with 140 ms minimum active-low reset pulse. It halts and restarts out-of-control microprocessors during power transients or software lockup in embedded control systems.

For engineers reviewing the DS1819AR-10/T&R datasheet, DS1819AR-10/T&R pinout, DS1819AR-10/T&R application, or DS1819AR-10/T&R equivalent, key selection criteria include V_CC trip accuracy, watchdog strobe timing, pushbutton debounce behavior, reset output drive capability (3.2 mA sink), and industrial temperature operation (−40°C to +85°C).

Technical Context

The DS1819AR-10/T&R implements a precision bandgap reference and comparator for 3.3V supply monitoring with 5 mV hysteresis, ensuring stable reset assertion during brown-out recovery. Its internal watchdog timer triggers reset if the ST input fails to toggle within 1.12 seconds, and it supports external override via debounced PBRST input.

This 'A' variant integrates both watchdog (ST pin) and pushbutton reset (PBRST pin) functions, delivering dual active-low RST outputs with push-pull drive capable of valid logic down to 1.0 V V_CC, and includes internal 50 kΩ pull-up on PBRST.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	2.85–3.00 V (±10% tolerance for 3.0 V nominal systems)
Reset Active Time	140–280 ms (ensures processor stabilization after power-up or fault)
Watchdog Timeout	1.12–2.40 s (forces reset if microprocessor fails to strobe ST)
PBRST Debounce	Immune to <100 ns noise; generates ≥140 ms RST pulse on button release
Output Sink Current	3.2–6 mA at 0.4 V (drives standard CMOS reset inputs without external pull-down)
Operating Current	8–12 µA (ultra-low quiescent draw for battery-backed systems)
Temperature Range	−40°C to +85°C (supports industrial-grade embedded deployment)

Pinout & Package

SOT-23-5 surface-mount package with 1.6 mm × 2.9 mm footprint, 0.95 mm height, and gull-wing leads. RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
1 - RST	Active-low reset output	Push-pull driver; asserts low during power fault, watchdog timeout, or PBRST event
2 - GND	Ground reference	Common return for V_CC, inputs, and reset output
3 - PBRST	Pushbutton reset input	Active-low, internally pulled up to V_CC (50 kΩ); debounced and timed
4 - ST	Watchdog strobe input	Edge-sensitive; must toggle every ≤1.12 s to prevent reset assertion
5 - V_CC	Power supply input	Operates from 1.0 V to 5.5 V; monitors own supply for brown-out detection

Key Features

Feature	Design Value
3.3V Precision Power Monitoring	±10% trip threshold (2.85–3.00 V) with 5 mV hysteresis prevents chatter near threshold
Dual-Function Supervision	Integrated watchdog timer and pushbutton reset in single SOT-23-5 device eliminates discrete BOM items
Valid Reset Down to 1.0 V V_CC	Push-pull RST output remains logic-valid during deep brown-out, enabling safe shutdown sequencing
Industrial Temperature Operation	Guaranteed functionality from −40°C to +85°C supports harsh-environment control applications

Applications

Industrial PLC Controller	Smart Energy Meter
Use Scenario: Microcontroller-based programmable logic controller operating in factory environments with voltage fluctuations and EMI. IC Role / Device Role / Timing Role: DS1819AR-10/T&R monitors 3.3V rail, asserts RST on undervoltage, and resets MCU if firmware hangs (via ST strobe failure). Use Value: Prevents spurious I/O activation during brown-out and ensures deterministic recovery after power interruption.	Use Scenario: Battery-backed electricity meter with real-time clock and metrology ASIC requiring fail-safe reset during mains dropout. IC Role / Device Role / Timing Role: DS1819AR-10/T&R provides 140 ms minimum reset hold time on power-up and detects 3.3V supply collapse before RTC corruption occurs. Use Value: Guarantees clean initialization of metrology firmware and preserves timekeeping integrity across grid disturbances.
Medical Diagnostic Handheld	Automotive Body Control Module
Use Scenario: Portable ultrasound or glucose monitor with ARM Cortex-M MCU powered by Li-ion battery with variable discharge profile. IC Role / Device Role / Timing Role: DS1819AR-10/T&R monitors declining 3.3V rail from buck converter, triggers graceful shutdown via RST, and accepts manual reset via PBRST. Use Value: Enables controlled data save and state preservation before battery depletion-induced crash.	Use Scenario: Low-power BCM managing door locks, lighting, and sensors in 12V automotive electrical system with LDO-regulated 3.3V domain. IC Role / Device Role / Timing Role: DS1819AR-10/T&R supervises 3.3V MCU supply, responds to ignition-cycle power transitions, and resets MCU if CAN communication stalls (via ST timeout). Use Value: Eliminates need for separate watchdog IC and power monitor, reducing PCB area and BOM count.

Industrial PLC Controller

Smart Energy Meter

Use Scenario: Microcontroller-based programmable logic controller operating in factory environments with voltage fluctuations and EMI.

IC Role / Device Role / Timing Role: DS1819AR-10/T&R monitors 3.3V rail, asserts RST on undervoltage, and resets MCU if firmware hangs (via ST strobe failure).

Use Value: Prevents spurious I/O activation during brown-out and ensures deterministic recovery after power interruption.

Use Scenario: Battery-backed electricity meter with real-time clock and metrology ASIC requiring fail-safe reset during mains dropout.

IC Role / Device Role / Timing Role: DS1819AR-10/T&R provides 140 ms minimum reset hold time on power-up and detects 3.3V supply collapse before RTC corruption occurs.

Use Value: Guarantees clean initialization of metrology firmware and preserves timekeeping integrity across grid disturbances.

Medical Diagnostic Handheld

Automotive Body Control Module

Use Scenario: Portable ultrasound or glucose monitor with ARM Cortex-M MCU powered by Li-ion battery with variable discharge profile.

IC Role / Device Role / Timing Role: DS1819AR-10/T&R monitors declining 3.3V rail from buck converter, triggers graceful shutdown via RST, and accepts manual reset via PBRST.

Use Value: Enables controlled data save and state preservation before battery depletion-induced crash.

Use Scenario: Low-power BCM managing door locks, lighting, and sensors in 12V automotive electrical system with LDO-regulated 3.3V domain.

IC Role / Device Role / Timing Role: DS1819AR-10/T&R supervises 3.3V MCU supply, responds to ignition-cycle power transitions, and resets MCU if CAN communication stalls (via ST timeout).

Use Value: Eliminates need for separate watchdog IC and power monitor, reducing PCB area and BOM count.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervision applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX823SEUK+T	5V-only operation (4.50–4.75 V trip); no PBRST pin; same SOT-23-5 package	Not suitable for 3.3V systems; lacks pushbutton reset function	Select only for legacy 5V designs where DS1819AR-10/T&R's 3.3V trip and PBRST are unnecessary
TPS3808G12DBVR	Adjustable trip (1.225 V reference); fixed 200 ms reset delay; no watchdog or PBRST	Requires external RC or resistor divider for threshold setting; no built-in supervision logic	Choose when precise custom voltage threshold is needed and watchdog/PBRST are handled separately

Compared with MAX823SEUK+T and TPS3808G12DBVR, the DS1819AR-10/T&R uniquely combines 3.3V-specific ±10% monitoring, integrated watchdog timer, and pushbutton reset in one SOT-23-5 package-reducing component count and simplifying layout for space-constrained industrial microcontrollers.

Availability

DS1819AR-10/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, medical handheld diagnostics, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for DS1819AR-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 demanding industrial, medical, and communications applications.

The DS1819AR-10/T&R belongs to the MicroMonitor™ family-engineered specifically for reliable microprocessor supervision in 3.3V embedded systems where power integrity, software watchdogging, and manual reset capability must coexist in minimal footprint.

FAQ

What is the exact V_CC trip point range for DS1819AR-10/T&R?

The DS1819AR-10/T&R has a guaranteed V_CC trip point of 2.85 V to 3.00 V, corresponding to ±10% tolerance around a nominal 3.0 V supply. This specification is validated across the full industrial temperature range (−40°C to +85°C) and applies to the 'R-10' variant explicitly marked in the part number DS1819AR-10/T&R.

Does DS1819AR-10/T&R support both watchdog and pushbutton reset functions?

Yes, DS1819AR-10/T&R is an 'A' version device, which integrates both watchdog timer functionality (via ST pin, 1.12 s timeout) and pushbutton reset (via PBRST pin, debounced with ≥140 ms RST pulse). This dual capability is confirmed in the device type mapping table and functional block diagram of the official DS1814/DS1819 datasheet.

Can DS1819AR-10/T&R operate below 3.0 V, and what happens to RST output?

Yes, DS1819AR-10/T&R operates down to 1.0 V V_CC, and its RST output remains logic-valid (push-pull) down to that level. Below 1.0 V, a 100 kΩ pull-down resistor from RST to GND extends valid reset assertion to 0 V V_CC, enabling safe shutdown sequencing in ultra-low-voltage battery scenarios.

Is DS1819AR-10/T&R pin-compatible with MAX823-series devices?

Yes, DS1819AR-10/T&R is pin- and function-compatible with the MAX823/24/25 family per the datasheet's feature list. All share identical SOT-23-5 pinout (RST, GND, PBRST/ST/RST, ST/PBRST/RST, V_CC) and core supervision functions-enabling drop-in replacement in existing 3.3V designs originally using MAX823 variants.

What is the maximum recommended V_CC slew rate for reliable DS1819AR-10/T&R operation?

The DS1819AR-10/T&R specifies a minimum V_CC rising-edge slew rate of 12.5 V/s to ensure proper power-on reset timing and avoid metastability during startup. Exceeding this rate may cause premature RST deassertion before the microprocessor stabilizes; design guidance recommends limiting rise time to ≥100 µs for 3.3 V rails.

DS1819AR-10/T&R Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: MicroMonitor™

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.925V

Output:: Push-Pull, Totem Pole

Reset:: Active Low

Reset Timeout:: 140ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

DS1819AR-10/T&R FAQ

1.How can I place an order for DS1819AR-10/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1819AR-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 DS1819AR-10/T&R reliable?

The price and inventory of DS1819AR-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 DS1819AR-10/T&R is usually 5 days.

3.What payment methods are accepted for DS1819AR-10/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1819AR-10/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1819AR-10/T&R?

DS1819AR-10/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1819AR-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 DS1819AR-10/T&R?

For technical support, including DS1819AR-10/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1819AR-10/T&R requirements.

6.How does Aetrix verify that DS1819AR-10/T&R is sourced from the original manufacturer or authorized distributors?

All DS1819AR-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 DS1819AR-10/T&R meets industry standards.

7.What is the process for return or replacement of DS1819AR-10/T&R?

All DS1819AR-10/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1819AR-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 DS1819AR-10/T&R part is unused and in its original packaging.

Return procedure for DS1819AR-10/T&R:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…