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Analog Devices Inc./Maxim Integrated MAX6841HUKD3+
- Part No.:
- MAX6841HUKD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6841HUKD3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,599
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Product details
Overview
MAX6841HUKD3+ from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit designed to monitor +0.9V to +1.5V power supplies in portable and embedded digital systems. It provides factory-trimmed 1.313V reset threshold (suffix H), 210ms reset timeout (suffix D3), active-low push-pull RESET output, and debounced manual reset input (MR). It ensures reliable µP reset during power-up, brownout, and VCC transients in battery-powered equipment.
For engineers reviewing the MAX6841HUKD3+ datasheet, MAX6841HUKD3+ pinout, MAX6841HUKD3+ application, or MAX6841HUKD3+ equivalent, key selection criteria include its 1.313V fixed reset threshold, 210ms timeout, 5.7µA supply current, SOT23-5 package, and immunity to sub-150ns VCC glitches - critical for low-power, space-constrained designs.
Technical Context
The MAX6841HUKD3+ uses a precision bandgap-based comparator with ±2.5% threshold accuracy over temperature to detect VCC falling below 1.313V. Its internal timer asserts RESET for exactly 210ms (typ) after VCC rises above threshold or MR deasserts, independent of supply ramp rate.
It features a dedicated MR input with 20kΩ internal pullup and 1µs minimum pulse width support, and its push-pull RESET output remains valid down to VCC = 0.55V. The device ignores fast VCC transients (<150ns at 20mV overdrive) via built-in glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% - factory-trimmed voltage at which RESET asserts on VCC fall; enables precise monitoring of 1.3V core rails. |
| Reset Timeout Period | 210ms (typ) - fixed delay after VCC recovery or MR release; ensures µP completes full initialization before release. |
| Supply Current | 5.7µA (typ at 0.9V) - ultra-low quiescent current enabling multi-year battery life in always-on monitoring applications. |
| Operating Voltage Range | 0.75V to 1.8V - supports operation down to sub-1V supplies while maintaining valid RESET assertion. |
| Reset Output Type | Active-low push-pull - drives low without external pullup; sinks 10µA at 0.2×VCC, compatible with CMOS µP reset inputs. |
| VCC Transient Immunity | Rejects <150ns glitches at 20mV overdrive - prevents spurious resets during switching noise or load transients. |
| MR Input Pullup | 20kΩ internal resistor - eliminates need for external pullup; allows direct connection of momentary switch to GND. |
Pinout & Package
Package: 5-pin SOT23-5 (JEDEC MO-178AA), footprint-compatible with industry-standard 5-lead SOT-23, 2.9mm × 1.6mm × 1.1mm body height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during reset; drives directly into µP reset pin without external components. |
| 2 | GND | Ground reference for all internal comparators and timing circuits; must be low-impedance connection. |
| 3 | RESET (active-high) | Inverted complement of Pin 1; provides simultaneous active-high reset signal for auxiliary logic or status indication. |
| 4 | MR (active-low) | Manual reset input with 20kΩ internal pullup; pulling low forces immediate reset; no external debounce required. |
| 5 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold | Eliminates external resistor divider and calibration; guarantees ±2.5% accuracy from -40°C to +85°C. |
| 210ms fixed timeout | Ensures sufficient hold time for slow-ramping µP clocks and PLL lock sequences without software intervention. |
| 5.7µA supply current | Reduces standby power by >90% vs. legacy supervisors; extends battery life in IoT sensors and wearables. |
| MR input with 20kΩ pullup | Enables single-switch manual reset implementation; removes BOM cost and PCB area for external resistor. |
| VCC glitch immunity | Rejects transients ≤150ns duration, preventing false resets in noisy DC/DC converter environments. |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by coin-cell battery, requiring guaranteed reset during cold-start and brownout. IC Role / Device Role / Timing Role: Primary power-on and brownout supervisor; asserts RESET until VCC stabilizes above 1.313V and holds for 210ms. Use Value: Prevents firmware corruption during weak-battery startup; 5.7µA ICC extends operational life beyond 3 years. |
Use Scenario: LoRaWAN end-node with intermittent wake-up, operating from 1.2V Li-SOCl₂ battery under variable temperature. IC Role / Device Role / Timing Role: Ultra-low-voltage supply monitor; detects VCC sag below 1.313V and triggers controlled µC reboot sequence. Use Value: Factory-trimmed threshold ensures consistent behavior across -40°C to +85°C without calibration drift. |
| Industrial Controller HMI | Edge AI Accelerator Modules |
|
Use Scenario: Touchscreen HMI panel with ARM Cortex-M7 MCU, powered by 1.3V LDO, subject to ESD-induced supply droop. IC Role / Device Role / Timing Role: System-level reset initiator; debounced MR input accepts front-panel reset button; RESET output drives µC and FPGA simultaneously. Use Value: Push-pull dual outputs eliminate need for level shifters or inverters; reduces component count and layout complexity. |
Use Scenario: Vision processing module using 1.2V core rail for neural network accelerator, requiring deterministic reset after thermal throttling events. IC Role / Device Role / Timing Role: Critical supply monitor for AI SoC core domain; 210ms timeout aligns with hardware boot ROM execution window. Use Value: Immunity to <150ns VCC transients prevents false resets during high-current GPU switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316HUT47+T | Same 1.313V threshold and SOT23-5 package, but fixed 47ms timeout (not 210ms); 12µA ICC. | Lacks MR input; no manual reset capability; unsuitable where field-service reset is required. | Select only if shorter timeout and higher ICC are acceptable and MR is unused. |
| TPS3123HDBVR | 1.313V threshold, 200ms timeout (±20%), 1.8µA ICC, but requires external pullup for open-drain RESET. | Open-drain output mandates external pullup resistor; incompatible with direct push-pull drive requirements. | Choose only if system already uses open-drain reset architecture and ultra-low ICC is prioritized over simplicity. |
Compared with MAX6841HUKD3+, MAX6316HUT47+T offers identical threshold but insufficient timeout for complex boot sequences, while TPS3123HDBVR saves current but adds design overhead with external components and lacks MR - making MAX6841HUKD3+ optimal for compact, feature-complete µP supervision.
Availability
MAX6841HUKD3+ is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial HMIs, edge AI accelerators, and telecom baseband modules requiring stable component supply across extended temperature ranges.
Supply support for MAX6841HUKD3+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6841–MAX6845 family was engineered specifically for ultra-low-voltage microprocessor supervision in space- and power-constrained portable electronics, targeting sub-1.5V core rails with minimal external components.
FAQ
What is the exact reset threshold voltage of the MAX6841HUKD3+?
The MAX6841HUKD3+ has a factory-trimmed reset threshold of 1.313V, with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is defined by the 'H' suffix in the part number and is verified per Maxim's production test flow. The threshold is referenced to VCC and remains stable across supply voltage variations from 0.75V to 1.8V. No external calibration is needed.
How long does the MAX6841HUKD3+ hold the RESET signal active after VCC recovers?
The MAX6841HUKD3+ holds the active-low RESET signal asserted for a fixed 210ms (typical) timeout period after VCC rises above the 1.313V threshold. This value is set by the 'D3' suffix and is guaranteed across temperature and supply voltage. The timeout begins only after VCC exceeds threshold and MR is released, ensuring reliable µP initialization before release.
Does the MAX6841HUKD3+ require external components to operate?
No, the MAX6841HUKD3+ operates autonomously with zero external components for basic supervision: its 1.313V threshold is factory-trimmed, MR includes a 20kΩ internal pullup, and RESET is push-pull. Only a 0.1µF VCC bypass capacitor is recommended for transient immunity. No resistors, capacitors, or trim pots are needed for standard operation - reducing BOM cost and PCB area.
Can the MAX6841HUKD3+ monitor supplies below 1.0V?
Yes, the MAX6841HUKD3+ operates with VCC as low as 0.75V and asserts RESET down to VCC = 0.55V. However, its 1.313V threshold means it is intended for monitoring supplies ≥1.3V nominal (e.g., 1.3V or 1.35V rails). For sub-1.0V monitoring, other variants like MAX6841EUKD3+ (0.833V threshold) are specified - the 'H' suffix fixes the threshold and cannot be adjusted.
What is the function of Pin 3 (RESET) on the MAX6841HUKD3+?
Pin 3 on the MAX6841HUKD3+ is the active-high push-pull RESET output - the logical inverse of Pin 1 (active-low RESET). When VCC drops below 1.313V or MR is pulled low, Pin 1 goes low while Pin 3 goes high, providing complementary reset signals. This enables direct interfacing with logic that requires active-high reset or status indication without external inverters.
MAX6841HUKD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.313V
- 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
MAX6841HUKD3+ FAQ
1.How can I place an order for MAX6841HUKD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6841HUKD3+ 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 MAX6841HUKD3+ reliable?
The price and inventory of MAX6841HUKD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6841HUKD3+ is usually 5 days.
3.What payment methods are accepted for MAX6841HUKD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6841HUKD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6841HUKD3+?
MAX6841HUKD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6841HUKD3+ 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 MAX6841HUKD3+?
For technical support, including MAX6841HUKD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6841HUKD3+ requirements.
6.How does Aetrix verify that MAX6841HUKD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6841HUKD3+ 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 MAX6841HUKD3+ meets industry standards.
7.What is the process for return or replacement of MAX6841HUKD3+?
All MAX6841HUKD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6841HUKD3+, 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 MAX6841HUKD3+ part is unused and in its original packaging.
Return procedure for MAX6841HUKD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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