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

Analog Devices Inc./Maxim Integrated MAX6841FUKD0+T

Name: MAX6841FUKD0+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6841FUKD0+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6841FUKD0+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: MAX6841FUKD0+T.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

MAX6841FUKD0+T from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit designed to monitor 0.788V V_CC supply rails in portable and battery-powered digital systems. It provides factory-trimmed reset threshold (0.788V), 30ms reset timeout, active-low push-pull RESET output, manual reset input (MR), and guaranteed reset validity down to V_CC = 0.55V - used for reliable power-on reset and brownout protection in handheld controllers and telecom baseband modules.

For engineers reviewing the MAX6841FUKD0+T datasheet, MAX6841FUKD0+T pinout, MAX6841FUKD0+T application, or MAX6841FUKD0+T equivalent, key selection criteria include its fixed 0.788V threshold, SOT23-5 package, 5.7µA quiescent current, ±2.5% threshold accuracy over temperature, and compatibility with sub-1V core logic supplies.

Technical Context

The MAX6841FUKD0+T implements a precision voltage comparator with hysteresis (0.75% of V_TH) and a fixed 30ms reset timeout timer triggered by V_CC falling below 0.788V or MR assertion. Its internal 20kΩ MR pullup eliminates external components, and the reset comparator ignores transients <150ns wide at 100mV overdrive.

This device operates across V_CC = 0.75V to 1.8V, draws only 5.7µA typical supply current at 0.9V, and maintains valid push-pull RESET output down to V_CC = 0.55V - enabling robust reset signaling during deep brownout conditions in low-power SoC subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	0.788V (factory-trimmed, ±2.5% over -40°C to +85°C) - ensures accurate detection of 0.8V-class core supply collapse
Reset Timeout Period	30ms (typical) - provides sufficient hold time for µP initialization after power recovery
Supply Current	5.7µA (typ at V_CC = 0.9V) - enables multi-year battery life in always-on monitoring applications
Output Type	Active-low push-pull RESET - drives CMOS inputs directly without external pullup resistor
Minimum Valid V_CC	0.55V - guarantees RESET remains asserted and functional even during severe undervoltage events
MR Input Pulse Width	1µs minimum - supports fast, noise-immune manual reset via momentary switch or logic signal
Operating Temperature	-40°C to +85°C - qualified for industrial and telecom infrastructure environments

Pinout & Package

MAX6841FUKD0+T is housed in a 5-pin SOT23-5 package (1.6mm × 2.9mm × 1.1mm), optimized for space-constrained portable PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	RESET (active-low)	Push-pull output that sinks current when asserted; drives µP reset pin low without external components
2	GND	Ground reference for all internal comparators and timing circuits
3	RESET (active-high)	Inverted push-pull output - high during reset, low otherwise; useful for OR-ing multiple reset sources
4	MR (active-low)	Manual reset input with internal 20kΩ pullup to V_CC; assert low ≥1µs to force reset
5	V_CC	Monitored supply input (0.75V–1.8V); powers internal circuitry and sets reset threshold reference

Key Features

Feature	Design Value
Factory-trimmed 0.788V threshold	Eliminates external resistor divider and calibration effort for 0.8V rail monitoring
30ms fixed reset timeout	Matches typical µP power-up sequencing requirements without external RC timing components
5.7µA supply current	Reduces standby power in battery-backed systems - e.g., adds <0.05% monthly drain on 100mAh coin cell
Immunity to 150ns V_CC transients	Prevents false resets caused by switching noise or LDO ripple in dense DC/DC layouts
Valid RESET down to V_CC = 0.55V	Ensures deterministic system shutdown before logic states become undefined in deep brownout

Applications

Portable Medical Sensors	Industrial PLC I/O Modules
Use Scenario: Wearable ECG sensor operating from single-cell Li-ion (2.8V–4.2V) with buck converter stepping to 0.8V core supply. IC Role / Device Role / Timing Role: Primary power-on and brownout supervisor for ARM Cortex-M0+ MCU; asserts reset until 0.8V rail stabilizes for ≥30ms. Use Value: Prevents firmware crash during battery sag by guaranteeing reset remains active until V_CC exceeds 0.788V and holds for full 30ms timeout.	Use Scenario: DIN-rail mounted analog input module powered by 24V DC/DC with 0.8V FPGA configuration rail. IC Role / Device Role / Timing Role: Dedicated supervisor for FPGA configuration voltage; monitors 0.8V rail and triggers hard reset on undervoltage. Use Value: Enables fail-safe reconfiguration after power interruption - FPGA reloads bitstream only after stable 0.8V rail confirmed for 30ms.
5G Small Cell Baseband Units	Smart Energy Meters
Use Scenario: Baseband ASIC powered by 0.85V supply in outdoor small cell unit exposed to -40°C ambient. IC Role / Device Role / Timing Role: Cold-temperature-stable reset generator ensuring ASIC reset validity across full industrial range. Use Value: ±2.5% threshold accuracy over -40°C to +85°C prevents premature release or extended hold during thermal cycling.	Use Scenario: Tamper-resistant electricity meter with real-time clock and metrology SoC running at 0.8V. IC Role / Device Role / Timing Role: Low-power supervisor maintaining RTC integrity during main supply dropout using backup capacitor. Use Value: 5.7µA quiescent current extends supercapacitor hold-up time by >20% versus higher-current alternatives.

Portable Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Wearable ECG sensor operating from single-cell Li-ion (2.8V–4.2V) with buck converter stepping to 0.8V core supply.

IC Role / Device Role / Timing Role: Primary power-on and brownout supervisor for ARM Cortex-M0+ MCU; asserts reset until 0.8V rail stabilizes for ≥30ms.

Use Value: Prevents firmware crash during battery sag by guaranteeing reset remains active until V_CC exceeds 0.788V and holds for full 30ms timeout.

Use Scenario: DIN-rail mounted analog input module powered by 24V DC/DC with 0.8V FPGA configuration rail.

IC Role / Device Role / Timing Role: Dedicated supervisor for FPGA configuration voltage; monitors 0.8V rail and triggers hard reset on undervoltage.

Use Value: Enables fail-safe reconfiguration after power interruption - FPGA reloads bitstream only after stable 0.8V rail confirmed for 30ms.

5G Small Cell Baseband Units

Smart Energy Meters

Use Scenario: Baseband ASIC powered by 0.85V supply in outdoor small cell unit exposed to -40°C ambient.

IC Role / Device Role / Timing Role: Cold-temperature-stable reset generator ensuring ASIC reset validity across full industrial range.

Use Value: ±2.5% threshold accuracy over -40°C to +85°C prevents premature release or extended hold during thermal cycling.

Use Scenario: Tamper-resistant electricity meter with real-time clock and metrology SoC running at 0.8V.

IC Role / Device Role / Timing Role: Low-power supervisor maintaining RTC integrity during main supply dropout using backup capacitor.

Use Value: 5.7µA quiescent current extends supercapacitor hold-up time by >20% versus higher-current alternatives.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6316HUT48+T	Fixed 4.8V threshold, 140ms timeout, SOT23-5, 1.6µA I_CC	Designed for 5V systems; not suitable for sub-1V monitoring	Select only if supervising >4.5V rails where ultra-low I_CC outweighs voltage range mismatch
TPS3106K33DBVR	3.3V threshold, 200ms timeout, SOT23-5, 1.1µA I_CC, open-drain output	Lacks push-pull drive and sub-1V operation; requires external pullup	Choose for 3.3V I/O domain supervision where lowest possible quiescent current is critical

Compared with MAX6841FUKD0+T, MAX6316HUT48+T offers lower supply current but cannot monitor voltages below 4.5V, while TPS3106K33DBVR provides superior I_CC efficiency at 3.3V but lacks the 0.788V threshold and push-pull drive needed for direct µP reset interface in ultra-low-voltage designs.

Availability

MAX6841FUKD0+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, 5G small cell baseband units, and smart energy meters requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MAX6841FUKD0+T 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX6841–MAX6845 family was designed specifically to address the challenge of reliable reset generation in sub-1V digital systems - delivering precision voltage monitoring, low quiescent power, and robust transient immunity in minimal footprint.

FAQ

What is the exact reset threshold voltage of MAX6841FUKD0+T?

The MAX6841FUKD0+T has a factory-trimmed reset threshold of 0.788V (minimum 0.765V, maximum 0.810V) with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is fixed and does not require external resistor networks - it is laser-trimmed during manufacturing and specified in the Electrical Characteristics table of the MAX6841–MAX6845 datasheet.

Does MAX6841FUKD0+T support manual reset functionality?

Yes, MAX6841FUKD0+T includes a dedicated active-low manual reset input (MR) with internal 20kΩ pullup to V_CC. Pulling MR low for ≥1µs forces reset assertion regardless of V_CC level. Reset remains active for the full 30ms timeout period after MR returns high, making it suitable for pushbutton-initiated system recovery in field-deployed equipment.

Can MAX6841FUKD0+T operate with V_CC below 0.8V?

Yes, MAX6841FUKD0+T is fully specified down to V_CC = 0.75V and guarantees valid reset output down to V_CC = 0.55V. Its internal circuitry remains functional and the push-pull RESET output continues to sink current reliably at 0.55V - a critical capability for systems requiring deterministic behavior during deep brownout conditions.

What is the reset timeout period for MAX6841FUKD0+T?

The MAX6841FUKD0+T has a fixed reset timeout period of 30ms (typical), with min/max values of 20ms and 40ms respectively. This timeout begins when V_CC rises above the 0.788V threshold or when MR is released, and ensures the reset signal remains asserted long enough for microprocessors to complete internal initialization sequences.

Is MAX6841FUKD0+T compatible with lead-free assembly processes?

Yes, MAX6841FUKD0+T is offered in lead-free packaging - the "+T" suffix explicitly denotes RoHS-compliant, lead-free tape-and-reel delivery. It is qualified for standard Pb-free reflow profiles (J-STD-020) and features matte tin plating on the SOT23-5 leads, supporting both automated SMT assembly and hand-soldering with appropriate thermal profiling.

MAX6841FUKD0+T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

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:: 1.05V

Output:: Push-Pull, Push-Pull

Reset:: Active High/Active Low

Reset Timeout:: 150µs Typical

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

MAX6841FUKD0+T FAQ

1.How can I place an order for MAX6841FUKD0+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6841FUKD0+T 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 MAX6841FUKD0+T reliable?

The price and inventory of MAX6841FUKD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6841FUKD0+T is usually 5 days.

3.What payment methods are accepted for MAX6841FUKD0+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6841FUKD0+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6841FUKD0+T?

MAX6841FUKD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6841FUKD0+T 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 MAX6841FUKD0+T?

For technical support, including MAX6841FUKD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6841FUKD0+T requirements.

6.How does Aetrix verify that MAX6841FUKD0+T is sourced from the original manufacturer or authorized distributors?

All MAX6841FUKD0+T 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 MAX6841FUKD0+T meets industry standards.

7.What is the process for return or replacement of MAX6841FUKD0+T?

All MAX6841FUKD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6841FUKD0+T, 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 MAX6841FUKD0+T part is unused and in its original packaging.

Return procedure for MAX6841FUKD0+T:

1.Submit a request within 90 days.

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

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