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Analog Devices Inc./Maxim Integrated MAX6361LUT46+T
- Part No.:
- MAX6361LUT46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361LUT46+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,300
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Product details
Overview
MAX6361LUT46+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-preset 4.63V reset threshold, active-low push-pull reset output, and battery switchover capability for SRAM backup. It operates from +1.2V supply, guarantees RESET/RESET validity down to 1.2V, and delivers 150ms minimum reset timeout - used in portable equipment requiring reliable brownout protection and nonvolatile memory retention during power failure.
For engineers reviewing the MAX6361LUT46+T datasheet, MAX6361LUT46+T pinout, MAX6361LUT46+T application, or MAX6361LUT46+T equivalent, key selection criteria include its 4.63V precision reset threshold, SOT23-6 package compatibility, manual reset input (MR), guaranteed 1.2V operation, and integrated VCC-to-BATT switchover logic for SRAM power continuity.
Technical Context
The MAX6361LUT46+T implements a precision voltage monitor with ±1.5% reset threshold accuracy over -40°C to +85°C, internal 20kΩ MR pull-up resistor, and glitch-immune 100ns MR input filtering. Its reset assertion logic combines VCC falling-edge detection, MR low-level assertion, and hysteresis-based battery switchover control.
It features dual-path power routing: OUT sources from VCC when VCC > VTH and switches to BATT when VCC falls below VTH and VBATT exceeds VCC by ≥20mV, with 40mV hysteresis preventing oscillation during slow VCC decay. The push-pull RESET output drives directly without external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (factory-preset, ±1.5% over temperature) - ensures reliable reset initiation for +5V systems before undervoltage lockout. |
| Supply Voltage Range | +1.2V to +5.5V - supports ultra-low-voltage operation and full compatibility with 1.8V/2.5V/3.3V/5V rails. |
| Reset Timeout Period | 150ms (minimum) - guarantees µP reset hold time sufficient for full power stabilization and clock settling. |
| Supply Current (VCC) | 15µA typical at VCC = 5.5V - enables multi-year battery life in always-on backup applications. |
| Battery Standby Current | 0.05µA max at TA = -40°C to +85°C - minimizes drain on coin-cell batteries during extended backup mode. |
| VCC-to-OUT On-Resistance | 2.75Ω at VCC = 4.75V, IOUT ≤150mA - supports up to 150mA SRAM load without significant voltage drop. |
| Reset Output Type | Active-low push-pull - eliminates need for external pull-up resistor and ensures fast, rail-to-rail RESET assertion. |
Pinout & Package
Package: 6-pin SOT23 (U6-1, outline 21-0058), RoHS-compliant, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull reset output | Drives µP reset input directly; sinks 20mA; valid down to 1.2V supply; no external pull-up required. |
| 2: GND | Ground reference | Common return path for VCC, BATT, and all internal comparators and logic. |
| 3: MR | Manual reset input | Debounced TTL/CMOS-compatible input with 20kΩ internal pull-up; asserts reset when pulled low. |
| 4: VCC | Main supply input | Primary power source; reset asserted when VCC falls below 4.63V; powers internal circuitry and OUT path. |
| 5: OUT | Power output for SRAM or critical loads | Switches between VCC and BATT based on voltage comparison; delivers up to 150mA from VCC or 10mA from BATT. |
| 6: BATT | Backup battery input | Connects to coin cell or backup source; activates switchover when VCC < VBATT − 20mV; draws <1µA in standby. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V reset threshold | ±1.5% tolerance over full temperature range ensures consistent reset behavior in +5V systems without calibration. |
| 1.2V guaranteed operation | Enables use with ultra-low-voltage µPs and preserves reset functionality even during deep brownout conditions. |
| Integrated battery switchover | Automatic MOSFET-controlled switching between VCC and BATT with 40mV hysteresis prevents chatter during slow VCC decay. |
| Push-pull RESET output | Eliminates external pull-up components, reduces BOM count, and improves rise/fall time vs. open-drain alternatives. |
| 150ms minimum reset timeout | Meets JEDEC JESD84-A44B requirements for µP initialization timing and ensures stable clock acquisition before release. |
| 100ns MR input glitch immunity | Filters noise on manual reset lines without external RC networks - critical in industrial or high-EMI environments. |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
|
Use Scenario: Battery-powered glucose meters and handheld diagnostic tools require SRAM data retention during battery replacement or low-battery shutdown. IC Role / Device Role / Timing Role: MAX6361LUT46+T monitors main supply, asserts reset before brownout, and seamlessly transfers SRAM power to backup cell. Use Value: Prevents data corruption during power transitions; 0.05µA BATT standby current extends 3V coin-cell life beyond 10 years. |
Use Scenario: Remote environmental sensors log temperature/humidity continuously and transmit data intermittently via LoRaWAN. IC Role / Device Role / Timing Role: MAX6361LUT46+T provides deterministic reset on mains dropout and maintains real-time clock + sensor RAM integrity. Use Value: 150ms reset timeout aligns with µC bootloader timing; 4.63V threshold matches 5V LDO output, avoiding false resets. |
| Retail POS Terminals | Smart Meters |
|
Use Scenario: Point-of-sale terminals operate from AC adapter but retain transaction logs in SRAM during brief outages or cable disconnection. IC Role / Device Role / Timing Role: MAX6361LUT46+T detects 5V rail collapse, holds µP in reset, and powers SRAM from backup capacitor or battery. Use Value: Push-pull RESET eliminates pull-up resistor, reducing PCB area and cost; 1.2V operation supports low-power sleep modes. |
Use Scenario: Electricity meters store billing data and firmware state in SRAM during grid interruptions lasting seconds to minutes. IC Role / Device Role / Timing Role: MAX6361LUT46+T acts as primary supervisor for metering SoC, coordinating reset, battery switchover, and power-fail warning. Use Value: Factory-trimmed 4.63V threshold eliminates external resistor network; SOT23-6 footprint enables compact meter PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT46+T | Same 4.63V threshold and push-pull output, but rated for -40°C to +125°C industrial temp range. | Suitable for under-hood automotive or high-temp industrial enclosures where ambient exceeds +85°C. | Select when extended temperature operation is required; otherwise identical functional behavior. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, open-drain output, 1.8V–6.0V supply, 2.5µA quiescent current. | Lacks battery switchover and manual reset; optimized for low-quiescent, single-rail monitoring only. | Choose only if battery backup is unnecessary and 3.3V reset level suffices; requires external pull-up. |
Compared with MAX6361HUT46+T, the MAX6361LUT46+T trades extended temperature rating for lower cost and standard industrial grade; compared with TPS3808G33DBVR, it adds critical battery switchover and MR functionality at higher supply current but enables true SRAM backup integrity.
Availability
MAX6361LUT46+T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, and retail POS terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6361LUT46+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX6361–MAX6364 family was developed specifically for microprocessor systems needing integrated power supervision, battery backup switchover, and manual reset - targeting space-constrained, battery-sensitive applications like portable instrumentation and smart meters.
FAQ
What is the exact reset threshold voltage of the MAX6361LUT46+T?
The MAX6361LUT46+T has a factory-trimmed reset threshold of 4.63V, with ±1.5% accuracy over the full -40°C to +85°C operating temperature range. This value is confirmed in the Electrical Characteristics table under "Reset Threshold" for suffix "46", and applies specifically to the MAX6361LUT46+T variant - not to other members of the MAX6361–MAX6364 family.
Does the MAX6361LUT46+T support battery backup for SRAM, and how does switchover work?
Yes, the MAX6361LUT46+T supports battery backup for SRAM via its dedicated BATT pin and automatic switchover logic. When VCC falls below the 4.63V threshold and VBATT exceeds VCC by ≥20mV, the device connects BATT to OUT. A 40mV hysteresis prevents oscillation during slow VCC decay. The MAX6361LUT46+T delivers up to 10mA from BATT while drawing only 0.05µA in standby.
What type of reset output does the MAX6361LUT46+T provide, and why does it matter?
The MAX6361LUT46+T provides an active-low push-pull reset output (pin 1). Unlike open-drain variants, this eliminates the need for an external pull-up resistor, reduces component count, improves rise/fall time, and ensures robust reset signaling even at 1.2V supply. This design choice simplifies layout and enhances reliability in noise-prone environments.
Can the MAX6361LUT46+T operate from a 1.8V supply, and what happens to reset functionality?
Yes, the MAX6361LUT46+T operates from supplies as low as +1.2V, including 1.8V. Its RESET/RESET outputs remain fully functional down to 1.2V - meaning the reset signal stays valid and asserted correctly even during deep brownout. This is explicitly guaranteed in the datasheet's "RESET/RESET Valid Down to 1.2V Guaranteed" feature list.
Is the manual reset input (MR) on the MAX6361LUT46+T debounced internally?
Yes, the MR input on the MAX6361LUT46+T includes internal debounce logic with 100ns glitch immunity, eliminating the need for external RC filters. It features a 20kΩ internal pull-up to VCC and accepts TTL/CMOS logic levels. A momentary switch from MR to GND provides full manual reset capability without additional components.
MAX6361LUT46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- 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+T FAQ
1.How can I place an order for MAX6361LUT46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361LUT46+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 MAX6361LUT46+T reliable?
The price and inventory of MAX6361LUT46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361LUT46+T is usually 5 days.
3.What payment methods are accepted for MAX6361LUT46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361LUT46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361LUT46+T?
MAX6361LUT46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361LUT46+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 MAX6361LUT46+T?
For technical support, including MAX6361LUT46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361LUT46+T requirements.
6.How does Aetrix verify that MAX6361LUT46+T is sourced from the original manufacturer or authorized distributors?
All MAX6361LUT46+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 MAX6361LUT46+T meets industry standards.
7.What is the process for return or replacement of MAX6361LUT46+T?
All MAX6361LUT46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361LUT46+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 MAX6361LUT46+T part is unused and in its original packaging.
Return procedure for MAX6361LUT46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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