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Analog Devices Inc./Maxim Integrated MAX6361LUT46+
- Part No.:
- MAX6361LUT46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361LUT46+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,740
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Product details
Overview
MAX6361LUT46+ from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-preset 4.63V reset threshold, battery switchover capability, and active-low push-pull reset output. It operates from +1.2V supply, monitors VCC down to 1.2V, provides 150ms minimum reset timeout, and supports SRAM backup during brownout. Used in portable/battery-powered equipment for reliable µP reset and power-fail detection.
For engineers reviewing the MAX6361LUT46+ datasheet, MAX6361LUT46+ pinout, MAX6361LUT46+ application, or MAX6361LUT46+ equivalent, key selection criteria include its 4.63V precision reset threshold, SOT23-6 package, 1.2V operational minimum, battery-on switchover hysteresis, and guaranteed reset assertion during VCC transients below threshold.
Technical Context
This device integrates precision voltage monitoring, manual reset debouncing (MR input), and battery-backed power switchover into a single SOT23-6 IC. Its internal comparator references a stable bandgap, enabling ±1.5% reset threshold accuracy over -40°C to +85°C and immunity to supply transients up to 30µs at 100mV overdrive.
The MAX6361LUT46+ implements a dual-path power switch: when VCC ≥ VTH and VCC > VBATT + 20mV, OUT connects to VCC; when VCC < VTH and VBATT > VCC + 20mV, OUT switches to BATT with MOSFET on-resistance as low as 2.7Ω at 2.8V. Reset remains asserted for ≥150ms after VCC recovers above 4.63V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory preset, ±1.5% tolerance over temperature) |
| Operating Supply | +1.2V to +5.5V (VCC or VBATT - enables operation from single-cell Li+ or coin cell) |
| Reset Timeout | ≥150ms (guaranteed minimum delay before reset deassertion after VCC recovery) |
| Supply Current | 15µA typical at VCC = 5.5V (ultra-low quiescent current extends battery life) |
| Battery Standby | 0.05µA max at TA = -40°C to +85°C (negligible drain on backup source) |
| Output Type | Active-low push-pull RESET (no external pull-up required, drives µP reset pin directly) |
| VCC Transient Immunity | Withstands 30µs negative-going glitches 100mV below VTH (reduces false resets in noisy environments) |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, 2.9mm × 1.6mm × 1.1mm height, RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks 20mA; valid down to VCC = 1.2V |
| 2 - GND | Ground reference | Common return for VCC, BATT, and all internal circuits |
| 3 - MR | Manual reset input | Debounced logic-low input; asserts reset while low and for ≥150ms after release |
| 4 - VCC | Main supply input | Primary power source; reset asserted when VCC falls below 4.63V |
| 5 - OUT | Power output | Switches between VCC and BATT; powers SRAM or real-time clock during brownout |
| 6 - BATT | Backup battery input | Connects to coin cell or Li+; activates switchover when VCC < VBATT − 20mV |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V reset threshold | Enables reliable monitoring of +5V systems with ±1.5% accuracy across full industrial temperature range |
| 1.2V minimum operating voltage | Supports direct connection to single-cell Li+ (2.7–4.2V) or alkaline (1.5V) without LDO, reducing BOM count |
| Integrated battery switchover | Automatically transfers SRAM power to BATT during VCC brownout with 40mV hysteresis to prevent oscillation |
| Push-pull RESET output | Eliminates need for external pull-up resistor, simplifying layout and ensuring fast, rail-to-rail reset signaling |
| 150ms guaranteed reset timeout | Ensures µP completes power-up initialization before release, preventing code execution errors |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG monitor maintaining SRAM state during AC power loss or low-battery shutdown. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset and switching SRAM supply to backup battery within 20µs of VCC drop below 4.63V. Use Value: Prevents data corruption by guaranteeing clean µP reset and uninterrupted memory power during 100ms–5s brownouts. | Use Scenario: Remote sensor node logging temperature/pressure data to nonvolatile memory using intermittent solar charging. IC Role / Device Role / Timing Role: Monitoring main 3.6V Li+ supply and triggering controlled shutdown + SRAM backup when voltage decays to 4.63V. Use Value: Extends usable battery life by enabling operation down to 1.2V and eliminating external reset components. |
| Point-of-Sale Terminals | Smart Meters |
Use Scenario: Retail terminal performing secure transaction processing with volatile session keys stored in SRAM. IC Role / Device Role / Timing Role: Providing tamper-resistant reset signaling and instantaneous battery switchover to preserve cryptographic keys during mains failure. Use Value: Meets PCI PTS requirements for secure key retention via sub-100µs switchover and glitch-immune reset assertion. | Use Scenario: Electricity meter retaining time-of-use billing data and firmware state during grid voltage sags or outages. IC Role / Device Role / Timing Role: Detecting 4.63V threshold breach on 5V regulated rail and asserting reset while powering RTC/SRAM from backup capacitor or battery. Use Value: Ensures ANSI C12.1 compliance for 10-second data retention under brownout conditions without additional supervisor ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT46+ | Same 4.63V threshold and push-pull output, but rated for -40°C to +125°C (vs. -40°C to +85°C) | Suitable for under-hood automotive or high-temp industrial enclosures where extended temperature range is mandatory | Select when ambient operating temperature exceeds +85°C; otherwise identical functionality and pinout |
| TPS3808G33DBVR | 3.3V fixed reset threshold, open-drain output, 1.2V min supply, but lacks battery switchover and BATT pin | Applicable only in non-battery-backed systems requiring basic reset supervision without power path control | Choose only if battery backup is unnecessary and 3.3V reset level suffices; no functional replacement for switchover capability |
Compared with MAX6361HUT46+, the MAX6361LUT46+ offers identical electrical performance at lower cost for commercial-temperature applications, while the TPS3808G33DBVR provides simpler reset-only supervision without power-path management - making it unsuitable for SRAM backup use cases.
Availability
MAX6361LUT46+ is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, point-of-sale terminals, and smart meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6361LUT46+ 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 MAX6361–MAX6364 family was engineered specifically for ultra-low-power microprocessor supervision in battery-critical systems, integrating reset generation, manual reset, and seamless battery switchover in a space-constrained SOT23 package.
FAQ
What is the exact reset threshold voltage of the MAX6361LUT46+?
The MAX6361LUT46+ has a factory-trimmed reset threshold of 4.63V, with guaranteed tolerance of ±1.5% over the full -40°C to +85°C operating temperature range. This value is confirmed in the Electrical Characteristics table of the official datasheet (Rev 4, October 2011), and applies specifically to the "46" suffix variant. The MAX6361LUT46+ uses this precise threshold to supervise +5V power rails in systems where marginal undervoltage must trigger a controlled reset before logic errors occur.
Does the MAX6361LUT46+ support battery backup switchover, and how does it work?
Yes, the MAX6361LUT46+ fully supports automatic battery backup switchover. When VCC drops below the 4.63V reset threshold and VBATT exceeds VCC by at least 20mV, the internal MOSFET connects BATT to the OUT pin to power downstream SRAM or RTC. Switchover occurs within 20µs, and hysteresis prevents oscillation. The MAX6361LUT46+ requires no external components for this function - the BATT pin accepts 1.2V–5.5V backup sources, and OUT delivers up to 150mA from VCC or 10mA from BATT.
What is the function of the MR pin on the MAX6361LUT46+?
The MR (Manual Reset) pin on the MAX6361LUT46+ is a debounced, active-low input that forces reset assertion when pulled low. Reset remains active for ≥150ms after MR returns high, ensuring µP initialization completes. The MAX6361LUT46+ includes an internal 20kΩ pull-up to VCC, so MR can be driven directly by a momentary switch to GND or TTL/CMOS logic. No external RC network is needed - the MAX6361LUT46+ handles noise rejection internally, making it ideal for field-serviceable or test-mode reset functions.
Can the MAX6361LUT46+ operate with a 1.2V supply, and what happens to reset functionality at that voltage?
Yes, the MAX6361LUT46+ operates down to 1.2V on either VCC or VBATT, and its RESET output remains fully functional at this voltage - asserted low when VCC < 4.63V and deasserted only after VCC rises above threshold and holds for ≥150ms. The datasheet guarantees RESET/RESET validity down to 1.2V, meaning the output stage maintains rail-to-rail logic levels and sink capability (20mA) even at minimum supply. This allows the MAX6361LUT46+ to supervise ultra-low-voltage systems such as energy-harvesting nodes or single-cell battery applications.
Is the MAX6361LUT46+ pin-compatible with other variants in the MAX6361–MAX6364 family?
Yes, all MAX6361–MAX6364 devices, including the MAX6361LUT46+, share identical SOT23-6 pinout and footprint (U6-1 outline). Pin 1 is RESET, Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC, Pin 5 is OUT, and Pin 6 is BATT - regardless of suffix (e.g., 23, 26, 29, 31, 44, 46) or variant (MAX6361 vs. MAX6362). This allows drop-in replacement across threshold voltages and feature sets (e.g., swapping MAX6361LUT46+ for MAX6361LUT29+ requires no PCB change, only firmware validation of new threshold behavior).
MAX6361LUT46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6361LUT46+ FAQ
1.How can I place an order for MAX6361LUT46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361LUT46+ 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 MAX6361LUT46+ reliable?
The price and inventory of MAX6361LUT46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361LUT46+ is usually 5 days.
3.What payment methods are accepted for MAX6361LUT46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361LUT46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361LUT46+?
MAX6361LUT46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361LUT46+ 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 MAX6361LUT46+?
For technical support, including MAX6361LUT46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361LUT46+ requirements.
6.How does Aetrix verify that MAX6361LUT46+ is sourced from the original manufacturer or authorized distributors?
All MAX6361LUT46+ 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 MAX6361LUT46+ meets industry standards.
7.What is the process for return or replacement of MAX6361LUT46+?
All MAX6361LUT46+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361LUT46+, 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 MAX6361LUT46+ part is unused and in its original packaging.
Return procedure for MAX6361LUT46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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