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Analog Devices Inc./Maxim Integrated MAX6361LUT44+T
- Part No.:
- MAX6361LUT44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361LUT44+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,014
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Product details
Overview
MAX6361LUT44+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-preset 4.4V reset threshold, active-low push-pull reset output, and manual reset input (MR). It operates from +1.2V supply, provides 150ms minimum reset timeout, guarantees RESET/RESET validity down to 1.2V, and supports battery switchover for SRAM backup in brownout conditions. Used in portable/battery-powered equipment requiring reliable power-up sequencing and fault recovery.
For engineers reviewing the MAX6361LUT44+T datasheet, MAX6361LUT44+T pinout, MAX6361LUT44+T application, or MAX6361LUT44+T equivalent, key selection criteria include reset threshold accuracy (±1.5% over temperature), MR debounced timing (120ns MR-to-reset delay), guaranteed operation at 1.2V VCC/VBATT, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6361LUT44+T integrates precision voltage monitoring, manual reset assertion, and battery-backed power switchover in a single BiCMOS IC. Its internal 4.4V reset comparator triggers reset when VCC falls below threshold, with hysteresis preventing chatter during slow VCC decay.
It features a 20kΩ internal MR pull-up resistor, 150ms reset timeout timer, and push-pull RESET output capable of sourcing/sinking ≥500µA while maintaining logic levels down to 1.2V supply. The device requires no external components for basic operation and supports seamless transition between main supply and backup battery when VCC drops below VBATT by ≥20mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40V (factory preset, ±1.5% over -40°C to +85°C) |
| Reset Timeout Period | 150ms minimum - ensures µP completes power-up initialization before release |
| Supply Voltage Range | +1.2V to +5.5V - enables operation directly from Li+ battery or low-voltage rails |
| MR Input Delay | 120ns max - supports fast manual reset assertion without external timing components |
| Quiescent Current | 15µA typical at VCC = 5.5V - extends battery life in always-on backup mode |
| RESET Output Type | Active-low push-pull - eliminates need for external pull-up resistor, drives µP reset pin directly |
| Battery Switchover Hysteresis | 40mV (20mV on drop, 20mV on rise) - prevents oscillation during marginal VCC transitions |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, RoHS-compliant +T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks ≥1.6mA at VCC ≥ 2.1V; valid down to 1.2V supply |
| 2: GND | Ground reference | Common return path for all internal circuits and output drivers |
| 3: MR | Manual reset input | Logic-low assertion forces reset; internal 20kΩ pull-up to VCC; debounced internally |
| 4: VCC | Main supply input | Primary power source; reset asserted when VCC < 4.4V; powers internal circuitry and OUT |
| 5: OUT | Power output | Sources from VCC when active; switches to BATT during brownout; supports up to 150mA load |
| 6: BATT | Backup battery input | Connects to Li+ or coin cell; automatically engages when VCC < VBATT −20mV |
Key Features
| Feature | Design Value |
|---|---|
| Factory-preset 4.4V reset threshold | Eliminates external resistor divider; reduces BOM count and layout area for 5V system monitoring |
| Debounced manual reset input (MR) | Removes need for external RC filter or Schmitt trigger; supports momentary switch directly to GND |
| Push-pull RESET output | Drives µP reset pin without external pull-up; compatible with both CMOS and TTL input thresholds |
| 1.2V minimum operating voltage | Enables direct interface with single-cell Li+ batteries (2.7–4.2V) and ultra-low-power microcontrollers |
| Battery switchover with 40mV hysteresis | Prevents repeated switching during slow VCC decay; maintains stable SRAM power during brownout recovery |
Applications
| Portable Medical Devices | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered glucose meter with nonvolatile SRAM storing calibration data and usage history. IC Role / Device Role / Timing Role: Supervises 3.3V main rail and switches SRAM power to backup coin cell during battery swap or low-voltage shutdown. Use Value: Prevents SRAM corruption during power interruption; 150ms reset hold ensures firmware reinitializes before accessing memory. | Use Scenario: Remote environmental sensor node logging temperature/humidity to SPI flash, powered by solar-charged Li+ battery. IC Role / Device Role / Timing Role: Monitors 3.6V regulated supply; asserts reset if voltage sags below 4.4V due to cloud cover or aging battery. Use Value: Guarantees clean µP restart before corrupted data writes occur; 1.2V operation allows continued supervision even as battery discharges to 2.8V. |
| POS Terminal Power Management | Smart Meter Backup Circuitry |
Use Scenario: Retail point-of-sale terminal with hot-swap AC adapter and internal backup battery. IC Role / Device Role / Timing Role: Detects AC loss via VCC drop, switches SRAM and real-time clock to BATT, and signals host controller via RESET pulse. Use Value: Maintains transaction integrity during AC outage; MR pin enables technician-initiated reset without cycling main power. | Use Scenario: Electricity meter retaining time-of-use billing data during grid failure using supercapacitor backup. IC Role / Device Role / Timing Role: Provides precise 4.4V undervoltage detection on 5V meter supply and controls switchover to supercap backup path. Use Value: Matches utility-grade voltage tolerance requirements; ±1.5% threshold accuracy ensures compliance with IEC 62053-21. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT44+T | Same 4.4V threshold and MR function, but active-low open-drain RESET output | Requires external pull-up resistor; suited for wired-OR reset buses or level translation | Select when shared reset bus or mixed-voltage systems demand open-drain drive |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 200ms timeout, 1.8–6V supply range, no MR or battery switchover | Lacks manual reset and battery backup functions; designed for simpler supply monitoring only | Choose only for cost-sensitive 3.3V-only applications where battery switchover is unnecessary |
Compared with MAX6361HUT44+T, the MAX6361LUT44+T offers direct-drive reset capability without external components; versus TPS3808G33DBVR, it delivers full battery backup control and manual reset-critical for SRAM-retention systems where power continuity is non-negotiable.
Availability
MAX6361LUT44+T is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, POS terminals, smart meters, and battery-backed memory systems requiring stable component supply across extended production lifecycles.
Supply support for MAX6361LUT44+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 and mixed-signal ICs for power management, sensing, and connectivity in demanding industrial, automotive, and computing applications.
The MAX6361–MAX6364 family was engineered specifically for microprocessor systems needing integrated power supervision, battery switchover, and manual reset in minimal footprint-targeting portable, battery-powered, and mission-critical embedded equipment.
FAQ
What is the exact reset threshold voltage of the MAX6361LUT44+T?
The MAX6361LUT44+T has a factory-trimmed reset threshold of 4.40V, with guaranteed tolerance of ±1.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in the Electrical Characteristics table under "Reset Threshold" for suffix "UT44", and applies to VCC falling conditions with 10V/ms slew rate. The threshold remains stable across supply voltages from 1.2V to 5.5V.
Does the MAX6361LUT44+T support battery backup functionality?
Yes, the MAX6361LUT44+T fully supports battery backup. When VCC falls below the 4.40V reset threshold and VBATT exceeds VCC by at least 20mV, the internal MOSFET connects the BATT pin to the OUT pin to power downstream circuitry such as SRAM. The device maintains this state until VCC rises above VBATT by 20mV, providing 40mV hysteresis to prevent chattering during slow recovery.
What type of reset output does the MAX6361LUT44+T provide?
The MAX6361LUT44+T provides an active-low push-pull RESET output. Unlike open-drain variants, this output actively drives both high and low states without requiring an external pull-up resistor. It sources ≥500µA and sinks ≥1.6mA at VCC ≥ 2.1V, ensuring robust interfacing with standard µP reset inputs across its 1.2V–5.5V operating range.
Can the manual reset input (MR) of the MAX6361LUT44+T be left unconnected?
Yes, the MR pin of the MAX6361LUT44+T can be left unconnected because it features an internal 20kΩ pull-up resistor to VCC. When unused, this ensures MR remains at logic-high and does not inadvertently assert reset. If external control is needed, connect a normally-open momentary switch from MR to GND; no debounce circuitry is required due to built-in filtering.
What is the minimum supply voltage required for the MAX6361LUT44+T to operate correctly?
The MAX6361LUT44+T operates reliably down to +1.2V on either VCC or VBATT. All specifications-including reset assertion, MR response, RESET output logic levels, and battery switchover-are guaranteed at this voltage. This enables direct use with single-cell Li+ batteries (discharging to ~2.8V) and ultra-low-power microcontrollers that operate below 1.8V.
MAX6361LUT44+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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
MAX6361LUT44+T FAQ
1.How can I place an order for MAX6361LUT44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361LUT44+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 MAX6361LUT44+T reliable?
The price and inventory of MAX6361LUT44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361LUT44+T is usually 5 days.
3.What payment methods are accepted for MAX6361LUT44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361LUT44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361LUT44+T?
MAX6361LUT44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361LUT44+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 MAX6361LUT44+T?
For technical support, including MAX6361LUT44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361LUT44+T requirements.
6.How does Aetrix verify that MAX6361LUT44+T is sourced from the original manufacturer or authorized distributors?
All MAX6361LUT44+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 MAX6361LUT44+T meets industry standards.
7.What is the process for return or replacement of MAX6361LUT44+T?
All MAX6361LUT44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361LUT44+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 MAX6361LUT44+T part is unused and in its original packaging.
Return procedure for MAX6361LUT44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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