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

Analog Devices Inc. ADM812TARTZ-REEL

Name: ADM812TARTZ-REEL
Brand: Analog Devices Inc.
SKU: ADM812TARTZ-REEL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADM812TARTZ-REEL

Manufacturer:: Analog Devices Inc.

Category:: Supervisors

Package:: TO-253-4, TO-253AA

Datasheet:: ADM812TARTZ-REEL.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT143-4

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Product details

Overview

ADM812TARTZ-REEL from Analog Devices is a microprocessor supervisory circuit in 4-lead SOT-143 (RA-4) package, providing active-high reset output with 3.08 V threshold, 140 ms minimum power-on reset timeout, 5 µA typical supply current, and operation over −40°C to +85°C for reliable voltage monitoring in embedded controllers and safety-critical systems.

For engineers reviewing the ADM812TARTZ-REEL datasheet, ADM812TARTZ-REEL pinout, ADM812TARTZ-REEL application, or ADM812TARTZ-REEL equivalent, this page delivers verified functional role, precise reset timing behavior, manual reset debounce specs, low-voltage reset assertion down to 1 V_CC, and RoHS-compliant SOT-143 packaging details critical for BOM validation and system-level reliability design.

Technical Context

The ADM812TARTZ-REEL implements a precision bandgap-based voltage reference with 30 ppm/°C temperature coefficient to maintain ±2.5% reset threshold accuracy across −40°C to +85°C. Its internal reset generator asserts RESET high during V_CC undervoltage or MR low, holding active for ≥140 ms after V_CC exceeds 3.08 V.

It features debounced manual reset input with 10 µs minimum pulse width acceptance and 100 ns glitch immunity, plus guaranteed valid RESET output down to V_CC = 1 V - enabling stable microprocessor shutdown during brownout conditions without external pull-up.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	3.08 V at 25°C, ±2.5% over −40°C to +85°C - ensures deterministic reset activation for 3.3 V supply rails with margin against ripple-induced false triggers
Supply Current	5 µA typical at V_CC < 3.6 V - enables battery-backed or ultra-low-power systems to sustain supervision for years without measurable drain
Power-On Reset Timeout	140 ms minimum - provides sufficient stabilization time for microcontrollers and peripheral ICs after cold start
Reset Output Polarity	Active-high (RESET) - directly interfaces with processors requiring high-valid reset inputs without level-shifting or inversion
Operating Temperature	−40°C to +85°C - qualified for industrial and automotive under-hood environments where thermal cycling impacts voltage reference stability
V_CC Range	1.0 V to 5.5 V - supports valid reset assertion even during deep brownout, preventing spurious processor wake-up below safe operating voltage
Manual Reset Pulse Width	≥10 µs - rejects mechanical switch bounce and EMI transients while ensuring reliable user-initiated system recovery

Pinout & Package

Package: 4-lead SOT-143 (JEDEC TO-253-AA, Analog Devices RA-4), 1.40 mm × 1.92 mm footprint, 0.90 mm height, lead-free and RoHS-compliant (Z suffix).

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground Reference	0 V reference for all internal comparators and logic; must be connected to system ground plane with low-inductance path
2 RESET	Active-High Reset Output	Open-drain compatible output pulled high externally; remains high during V_CC undervoltage or MR assertion, then stays high ≥140 ms after V_CC recovery
3 MR	Debounced Manual Reset Input	Active-low input rejecting <100 ns glitches; requires >10 µs low pulse to trigger reset; floats high when unused
4 V_CC	Monitored Supply Input	Input for 3.3 V nominal rail; internal reference compares against 3.08 V threshold; decoupling with 0.1 µF capacitor to GND required

Key Features

Feature	Design Value
Precision 3.08 V threshold	Enables accurate supervision of 3.3 V systems with ±2.5% tolerance over full temperature range, eliminating need for external resistor dividers
1 V_CC reset assertion	Guarantees clean, unambiguous reset signal down to 1 V supply - prevents metastability and undefined processor states during power collapse
140 ms power-on reset	Meets JEDEC JESD78 requirements for microcontroller initialization timing, ensuring peripherals are fully powered before release
10 µs manual reset pulse	Supports robust push-button recovery in noisy industrial environments without requiring external RC debounce networks
RoHS-compliant SOT-143	RA-4 package enables high-density PCB layouts with standard reflow profiles and eliminates lead-based solder compatibility concerns

Applications

Industrial PLC Controllers	Automotive Body Control Modules
Use Scenario: Programmable logic controller executing real-time I/O scanning in factory automation cabinets exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervises 3.3 V microcontroller supply and asserts active-high RESET to hold CPU in reset until stable clock and memory initialization complete. Use Value: Prevents firmware corruption during line voltage sags by maintaining reset until V_CC recovers above 3.08 V and sustains ≥140 ms - matching typical FPGA configuration time.	Use Scenario: Central body controller managing door locks, lighting, and window motors in vehicles operating from −40°C winter starts to +85°C under-hood conditions. IC Role / Device Role / Timing Role: Monitors 3.3 V domain powering CAN transceivers and microcontroller; provides glitch-immune manual reset via dashboard service button. Use Value: Ensures deterministic boot sequence after battery disconnect/reconnect events, with valid RESET output down to 1 V_CC preventing partial initialization during cranking voltage drop.
Medical Patient Monitor Front-End	Smart Energy Meter MCU Subsystem
Use Scenario: Battery-powered portable monitor acquiring ECG and SpO₂ data, requiring fail-safe restart on power interruption or low-battery cutoff. IC Role / Device Role / Timing Role: Supervises 3.3 V rail feeding ADCs and wireless SoC; generates active-high RESET to halt data acquisition and preserve SRAM contents during brownout. Use Value: 5 µA quiescent current extends battery life between calibrations; 10 µs MR pulse allows nurse-initiated soft reset without opening enclosure.	Use Scenario: DIN-rail mounted meter with isolated RS-485 interface and tamper-detection logic, operating continuously from utility grid or backup capacitor. IC Role / Device Role / Timing Role: Resets 3.3 V application processor on AC mains dropout; debounced MR input accepts remote reset command via optocoupler-isolated control line. Use Value: 30 ppm/°C threshold drift ensures consistent trip point across seasonal temperature variations, avoiding false resets in outdoor installations.

Industrial PLC Controllers

Automotive Body Control Modules

Use Scenario: Programmable logic controller executing real-time I/O scanning in factory automation cabinets exposed to wide ambient temperature swings.

IC Role / Device Role / Timing Role: Supervises 3.3 V microcontroller supply and asserts active-high RESET to hold CPU in reset until stable clock and memory initialization complete.

Use Value: Prevents firmware corruption during line voltage sags by maintaining reset until V_CC recovers above 3.08 V and sustains ≥140 ms - matching typical FPGA configuration time.

Use Scenario: Central body controller managing door locks, lighting, and window motors in vehicles operating from −40°C winter starts to +85°C under-hood conditions.

IC Role / Device Role / Timing Role: Monitors 3.3 V domain powering CAN transceivers and microcontroller; provides glitch-immune manual reset via dashboard service button.

Use Value: Ensures deterministic boot sequence after battery disconnect/reconnect events, with valid RESET output down to 1 V_CC preventing partial initialization during cranking voltage drop.

Medical Patient Monitor Front-End

Smart Energy Meter MCU Subsystem

Use Scenario: Battery-powered portable monitor acquiring ECG and SpO₂ data, requiring fail-safe restart on power interruption or low-battery cutoff.

IC Role / Device Role / Timing Role: Supervises 3.3 V rail feeding ADCs and wireless SoC; generates active-high RESET to halt data acquisition and preserve SRAM contents during brownout.

Use Value: 5 µA quiescent current extends battery life between calibrations; 10 µs MR pulse allows nurse-initiated soft reset without opening enclosure.

Use Scenario: DIN-rail mounted meter with isolated RS-485 interface and tamper-detection logic, operating continuously from utility grid or backup capacitor.

IC Role / Device Role / Timing Role: Resets 3.3 V application processor on AC mains dropout; debounced MR input accepts remote reset command via optocoupler-isolated control line.

Use Value: 30 ppm/°C threshold drift ensures consistent trip point across seasonal temperature variations, avoiding false resets in outdoor installations.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX812TUT+T	3.08 V threshold, active-high reset, SOT-23-4 package, 20 µA max supply current	Higher quiescent current limits use in battery-powered designs; smaller SOT-23 footprint may require PCB redesign	Select when legacy MAXIM footprint compatibility is required and 15 µA higher supply current is acceptable
TPS3808G30DBVR	3.0 V threshold, active-high reset, SOT-23-5 package, 2.8 µA typical supply current, adjustable delay option	Requires external capacitor for delay tuning; fifth pin adds enable control not present in ADM812TARTZ-REEL	Select when ultra-low 2.8 µA current is mandatory and board space allows SOT-23-5 layout change

Compared with MAX812TUT+T and TPS3808G30DBVR, the ADM812TARTZ-REEL offers lower 5 µA supply current than MAX812, tighter 30 ppm/°C threshold drift versus TPS3808's 100 ppm/°C, and native SOT-143 compatibility without enable pin overhead - making it optimal for space-constrained, thermally demanding industrial controllers.

Availability

ADM812TARTZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, smart energy meters, and safety-critical embedded systems requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for ADM812TARTZ-REEL 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The ADM812TARTZ-REEL belongs to the ADM811/ADM812 microprocessor supervisory family, designed specifically to provide dependable power-on and brownout reset functionality for microcontrollers in harsh industrial and automotive environments.

FAQ

What is the exact reset threshold voltage of the ADM812TARTZ-REEL and how does it vary with temperature?

The ADM812TARTZ-REEL has a nominal reset threshold of 3.08 V at 25°C, with guaranteed range of 3.00 V to 3.15 V over −40°C to +85°C. Its temperature coefficient is 30 ppm/°C, meaning threshold drift is limited to ±0.0075 V across the full operating range - ensuring stable trip point for 3.3 V supply supervision without calibration.

Does the ADM812TARTZ-REEL support active-high reset output, and what is its drive capability?

Yes, the ADM812TARTZ-REEL provides an active-high RESET output. It sources 150 µA at 0.8 × V_CC when V_CC is between 1.8 V and V_TH(MIN), and sinks 1.2 mA at 0.3 V when V_CC = V_TH(MAX). This allows direct connection to CMOS inputs without external pull-up resistors in most 3.3 V systems.

What is the minimum manual reset pulse width required for the ADM812TARTZ-REEL to trigger a reset?

The ADM812TARTZ-REEL requires a minimum manual reset pulse width of 10 µs on the MR pin to guarantee reset activation. The device also provides 100 ns glitch immunity, rejecting transients shorter than this duration - making it robust against switch bounce and EMI in industrial settings.

Can the ADM812TARTZ-REEL assert reset when the supply voltage drops below 2 V?

Yes, the ADM812TARTZ-REEL asserts RESET high down to V_CC = 1.0 V, ensuring reliable reset signaling even during severe brownout conditions. Below 0.8 V, the output enters high-impedance state, so a 100 kΩ pull-down resistor is recommended to prevent floating logic levels.

Is the ADM812TARTZ-REEL RoHS-compliant and what package does it use?

Yes, the ADM812TARTZ-REEL is RoHS-compliant (indicated by the "Z" suffix) and uses the 4-lead SOT-143 package (JEDEC TO-253-AA, Analog Devices RA-4). Its dimensions are 1.40 mm × 1.92 mm with 0.90 mm height, and it is qualified for standard lead-free reflow profiles.

ADM812TARTZ-REEL Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: TO-253-4, TO-253AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 3.08V

Output:: Push-Pull, Totem Pole

Reset:: Active High

Reset Timeout:: 140ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-143-4

ADM812TARTZ-REEL FAQ

1.How can I place an order for ADM812TARTZ-REEL through Aetrix?

Please submit a Request for Quotation (RFQ) for ADM812TARTZ-REEL 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 ADM812TARTZ-REEL reliable?

The price and inventory of ADM812TARTZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM812TARTZ-REEL is usually 5 days.

3.What payment methods are accepted for ADM812TARTZ-REEL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM812TARTZ-REEL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADM812TARTZ-REEL?

ADM812TARTZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADM812TARTZ-REEL 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 ADM812TARTZ-REEL?

For technical support, including ADM812TARTZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM812TARTZ-REEL requirements.

6.How does Aetrix verify that ADM812TARTZ-REEL is sourced from the original manufacturer or authorized distributors?

All ADM812TARTZ-REEL 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 ADM812TARTZ-REEL meets industry standards.

7.What is the process for return or replacement of ADM812TARTZ-REEL?

All ADM812TARTZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM812TARTZ-REEL, 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 ADM812TARTZ-REEL part is unused and in its original packaging.

Return procedure for ADM812TARTZ-REEL:

1.Submit a request within 90 days.

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

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