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Analog Devices Inc./Maxim Integrated MAX6361PUT26+T
- Part No.:
- MAX6361PUT26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361PUT26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,445
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Product details
Overview
MAX6361PUT26+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-preset 2.63V reset threshold, manual reset input (MR), and active-low open-drain RESET output. It operates from +1.2V to +5.5V supply, provides 150ms minimum reset timeout, supports battery switchover via BATT/OUT path, and delivers guaranteed RESET assertion down to 1.2V for reliable µP initialization in portable/battery-powered systems.
For engineers reviewing the MAX6361PUT26+T datasheet, MAX6361PUT26+T pinout, MAX6361PUT26+T application, or MAX6361PUT26+T equivalent, key selection criteria include reset threshold accuracy (±1.5% over temperature), MR debounced timing (120ns MR-to-reset delay), battery switchover hysteresis (40mV), SOT23-6 package compatibility, and guaranteed operation at 1.2V VCC/VBATT.
Technical Context
The MAX6361PUT26+T integrates precision voltage monitoring, manual reset assertion, and battery-backed power path control in a single BiCMOS SOT23-6 device. Its internal comparator monitors VCC against a trimmed 2.63V threshold with ±1.5% tolerance over –40°C to +85°C, and asserts RESET when VCC falls below threshold or MR is pulled low.
It implements a dual-path power switch: OUT connects to VCC during normal operation and automatically switches to BATT when VCC drops below VBATT by ≥20mV - enabling seamless SRAM backup without external logic. The MR input includes a 20kΩ internal pull-up and 100ns glitch immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (factory-trimmed, ±1.5% over –40°C to +85°C) - ensures precise brownout detection for 2.5V/2.7V systems |
| Reset Timeout Period | 150ms (minimum) - guarantees µP reset hold time meets boot ROM requirements |
| Supply Voltage Range | +1.2V to +5.5V (VCC or VBATT) - supports Li+ battery, coin cell, and low-voltage logic rails |
| Supply Current (VCC) | 11µA (typical at VCC = 2.8V) - enables multi-year battery life in always-on backup mode |
| Battery Standby Current | 0.02µA (typical at TA = +25°C) - minimizes drain on backup source during extended storage |
| MR Input Pull-Up | 20kΩ (internal to VCC) - eliminates need for external resistor in manual reset switch design |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and level-shifting with external pull-up |
Pinout & Package
MAX6361PUT26+T is housed in a 6-pin SOT23 package (U6-1 outline, 21-0058 footprint), RoHS-compliant, with 1.0mm pitch and 2.9mm × 1.6mm body size. Pin 1 is RESET (active-low open-drain), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is VCC (supply input), Pin 5 is OUT (power output), Pin 6 is BATT (backup battery input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Active-low open-drain reset output | Asserts low during VCC undervoltage, MR low, or power-down; requires external pull-up for logic-high state |
| GND | Ground reference | Common return for VCC, BATT, and internal circuitry; must be low-impedance connection |
| MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC (20kΩ); debounced with 100ns glitch rejection |
| VCC | Main supply input | Primary power source (1.2V–5.5V); powers internal circuitry and supplies OUT during normal operation |
| OUT | Power output | Switches between VCC and BATT based on voltage comparison; sources up to 150mA from VCC |
| BATT | Backup battery input | Secondary supply (0–5.5V); activates when VCC < VBATT − 20mV; enables SRAM retention during main power loss |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±1.5% tolerance over full temperature range - eliminates external resistor network for threshold setting |
| Guaranteed 1.2V operation | RESET and MR functions fully specified down to 1.2V VCC or VBATT - supports ultra-low-voltage battery systems |
| Integrated battery switchover | Automatic MOSFET-based switching with 40mV hysteresis - prevents oscillation during slow VCC decay |
| Debounced manual reset | 120ns MR-to-reset propagation delay with 100ns glitch immunity - removes need for external RC filtering |
| Low quiescent current | 11µA typical ICC at 2.8V - extends operational lifetime in energy-constrained portable designs |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG monitor maintaining SRAM data during AC power interruption or battery swap. IC Role / Device Role / Timing Role: Supervisory circuit providing VCC brownout detection, MR-initiated calibration reset, and automatic BATT→OUT switchover. Use Value: Ensures uninterrupted memory retention with <1µA BATT standby current and 40mV switchover hysteresis preventing chatter. |
Use Scenario: DIN-rail mounted PLC module requiring deterministic reset during 24V DC supply transients. IC Role / Device Role / Timing Role: Reset generator asserting 150ms minimum RESET pulse on 24V rail sag below 22.5V (via resistor divider on RESET IN). Use Value: Prevents firmware corruption using 1.235V internal reference and 25nA RESET IN leakage for high-impedance sensing. |
| Smart Meter Data Loggers | POS Terminal Backup Power |
|
Use Scenario: Utility meter retaining time-of-use data across grid outages using supercapacitor backup. IC Role / Device Role / Timing Role: Dual-supply supervisor managing VCC (3.3V LDO) and VBATT (2.7V supercap), asserting RESET on VCC dropout. Use Value: Enables >10-year field life with 0.02µA VBATT standby current and guaranteed 1.2V operation during capacitor discharge tail. |
Use Scenario: Retail POS terminal preserving transaction buffer during brief AC mains dropout. IC Role / Device Role / Timing Role: Manual reset interface (MR button) and VCC monitoring for 5V system rail, driving active-low RESET to ARM Cortex-M4. Use Value: Delivers 150ms reset hold time meeting ARM boot ROM spec while supporting 1.2V–5.5V VCC range for flexible power design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT26+T | Same 2.63V threshold and SOT23-6 package, but push-pull RESET output instead of open-drain | Requires no external pull-up; unsuitable for wired-OR or level-shifted reset buses | Select when driving single-load µP reset pin directly without bus sharing |
| TPS3808G125DBVR | 2.5V threshold (±0.5%), 350ms reset timeout, 1.4V min operating voltage, no MR input | Lacks manual reset capability and battery switchover function; designed for fixed-rail monitoring only | Choose for cost-sensitive 2.5V systems where MR and BATT features are unnecessary |
Compared with MAX6361PUT26+T, the MAX6361HUT26+T offers push-pull drive for simpler single-load interfacing but sacrifices bus-sharing flexibility, while the TPS3808G125DBVR provides tighter threshold tolerance and longer timeout but omits critical battery backup and manual reset functionality required for portable SRAM retention.
Availability
MAX6361PUT26+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart meter data loggers, and POS terminal backup power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6361PUT26+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6361–MAX6364 family was engineered specifically for low-voltage, battery-backed microprocessor systems requiring precision reset generation, manual reset capability, and seamless power-source switchover - targeting portable instrumentation and critical embedded control.
FAQ
What is the exact reset threshold voltage of MAX6361PUT26+T?
The MAX6361PUT26+T has a factory-trimmed reset threshold of 2.63V, 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 "UT26", and applies specifically to the MAX6361PUT26+T variant - not extrapolated from adjacent thresholds like 2.32V or 2.93V.
Does MAX6361PUT26+T support battery backup functionality?
Yes, MAX6361PUT26+T supports battery backup via its dedicated BATT pin and automatic switchover logic. When VCC falls below VBATT by ≥20mV, the internal MOSFET connects BATT to OUT, sustaining power to attached SRAM. The device draws only 0.02µA from VBATT in standby, and the 40mV hysteresis prevents oscillation during slow VCC decay - all explicitly documented for MAX6361PUT26+T in the Detailed Description section.
What type of RESET output does MAX6361PUT26+T provide?
MAX6361PUT26+T provides an active-low open-drain RESET output, as confirmed by the Ordering Information table (suffix "PUT" denotes "open-drain, active-low") and Pin Description (RESET pin function states "MAX636_P is an active-low open-drain output"). This configuration requires an external pull-up resistor and enables wired-OR reset bus topologies.
Can MAX6361PUT26+T operate with a 1.2V supply?
Yes, MAX6361PUT26+T is fully specified to operate from 1.2V to 5.5V on both VCC and VBATT pins. The datasheet explicitly states "RESET/RESET Valid Down to 1.2V Guaranteed (VCC or VBATT)" and confirms functional operation including MR input and RESET assertion at 1.2V - verified across –40°C to +85°C in the Absolute Maximum Ratings and Electrical Characteristics tables.
Is there a manual reset input on MAX6361PUT26+T?
Yes, MAX6361PUT26+T includes a dedicated MR (Manual Reset) input on Pin 3. The MR pin features an internal 20kΩ pull-up to VCC, accepts TTL/CMOS logic levels, and asserts RESET when pulled low. Reset remains active for ≥150ms after MR returns high - all characteristics confirmed in the Pin Description, Features list, and Detailed Description sections for the MAX6361 series.
MAX6361PUT26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Open Drain or Open Collector
- 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
MAX6361PUT26+T FAQ
1.How can I place an order for MAX6361PUT26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361PUT26+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 MAX6361PUT26+T reliable?
The price and inventory of MAX6361PUT26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361PUT26+T is usually 5 days.
3.What payment methods are accepted for MAX6361PUT26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361PUT26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361PUT26+T?
MAX6361PUT26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361PUT26+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 MAX6361PUT26+T?
For technical support, including MAX6361PUT26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361PUT26+T requirements.
6.How does Aetrix verify that MAX6361PUT26+T is sourced from the original manufacturer or authorized distributors?
All MAX6361PUT26+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 MAX6361PUT26+T meets industry standards.
7.What is the process for return or replacement of MAX6361PUT26+T?
All MAX6361PUT26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361PUT26+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 MAX6361PUT26+T part is unused and in its original packaging.
Return procedure for MAX6361PUT26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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