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Analog Devices Inc./Maxim Integrated MAX6361PUT23+T
- Part No.:
- MAX6361PUT23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361PUT23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,010
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Product details
Overview
MAX6361PUT23+T from Maxim Integrated is a low-power microprocessor supervisory circuit with manual reset input, battery switchover, and power-fail warning functionality. It operates from +1.2V supply, features factory-preset 2.32V reset threshold, 150ms minimum reset timeout, and active-low open-drain RESET output in a 6-pin SOT23 package. It is used to safeguard SRAM retention during brownout in portable/battery-powered µP systems.
For engineers reviewing the MAX6361PUT23+T datasheet, MAX6361PUT23+T pinout, MAX6361PUT23+T application, or MAX6361PUT23+T equivalent, key selection criteria include guaranteed RESET/RESET validity down to 1.2V, debounced manual reset input (MR), precision 2.32V threshold tolerance (±1.5%), and battery-backup mode activation when VCC falls below VBATT by ≥20mV.
Technical Context
The MAX6361PUT23+T implements a precision voltage-monitoring comparator with internal 2.32V reference, coupled to a 150ms reset timeout timer and debounced MR input logic. Its battery switchover path uses an internal MOSFET with on-resistance as low as 2.55Ω at VCC = 2.38V and IOUT = 25mA.
It guarantees RESET assertion during VCC falling edge at 10V/ms with 20mV hysteresis for switchover control, and supports operation across -40°C to +85°C ambient temperature. The device requires no external components for basic supervision and delivers <15µA supply current at VCC = 2.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±1.5% - precisely monitors 2.5V/3.0V rail brownout without external resistor divider |
| Supply Voltage Range | +1.2V to +5.5V - enables direct interface with Li+ battery (2.4–4.2V) and ultra-low-voltage µPs |
| Reset Timeout Period | 150ms minimum - ensures µP completes full power-up initialization before release |
| Supply Current (VCC) | 11µA typical at 2.8V - extends battery life in always-on backup applications |
| Battery Standby Current | 0.02µA typical at +25°C - minimizes drain on coin-cell backup sources |
| MR Input Pull-Up | 20kΩ internal - eliminates need for external pull-up; supports momentary switch to GND |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration and level translation |
Pinout & Package
Package: 6-pin SOT23 (U6-1), RoHS-compliant, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low during VCC undervoltage, MR low, or power-up; requires external pull-up for logic-high state |
| 2 - GND | Ground reference | Common return for VCC, BATT, and all internal circuitry; must be low-impedance connection |
| 3 - MR | Debounced manual reset input | Logic-low assertion triggers reset; internal 20kΩ pull-up to VCC; no external debounce required |
| 4 - VCC | Main supply input | Primary power source; RESET asserted when VCC falls below 2.32V; powers internal circuitry and OUT |
| 5 - OUT | Switched output | Sources from VCC when above threshold; switches to BATT during brownout; drives SRAM VDD directly |
| 6 - BATT | Backup battery input | Connects to coin cell or supercap; activates switchover when VCC < VBATT − 20mV; 40mV hysteresis prevents chatter |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.32V reset threshold | Eliminates external resistor network and calibration; ±1.5% accuracy over full temperature range |
| Integrated battery switchover MOSFET | Enables seamless SRAM backup without external diodes or FETs; RON ≤2.7Ω at 2.38V |
| Guaranteed 1.2V operation | Ensures reliable reset assertion even during deep brownout where VCC drops to 1.2V |
| Debounced MR input with internal pull-up | Supports direct connection of mechanical switch to GND; no RC filter or firmware debounce needed |
| Power-supply transient immunity | Rejects negative-going transients ≤30µs at 100mV overdrive - prevents false resets in noisy environments |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG monitor maintains SRAM data during AC power loss or low-battery transition. IC Role / Device Role / Timing Role: Supervisory IC asserts RESET to halt µP execution and switches OUT from VCC to BATT to retain volatile memory contents. Use Value: Prevents data corruption during 200ms power interruption; consumes <0.05µA from CR2032 in backup mode. |
Use Scenario: Remote I/O module in factory automation sustains configuration registers during 48V DC supply sag. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail; triggers reset if voltage drops below 2.32V and enables battery-backed SRAM hold. Use Value: Guarantees deterministic restart after brownout; 150ms timeout aligns with PLC watchdog timing requirements. |
| Smart Meter Data Loggers | Handheld Test Equipment |
|
Use Scenario: Electricity meter retains tariff schedules and consumption history during grid outage. IC Role / Device Role / Timing Role: Provides power-fail warning via RESET assertion and routes backup power to real-time clock and nonvolatile RAM controller. Use Value: Enables clean shutdown and timestamped log save; 2.32V threshold matches 3.0V LDO dropout margin. |
Use Scenario: Portable oscilloscope preserves calibration coefficients and user settings when main battery is removed. IC Role / Device Role / Timing Role: Detects VCC collapse and initiates controlled µP reset while switching SRAM supply to onboard LiMnO₂ cell. Use Value: Eliminates need for external power-path controller; 6-pin SOT23 footprint saves PCB area in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT23+T | Same 2.32V threshold and SOT23-6 package, but push-pull RESET output instead of open-drain | Requires no external pull-up; unsuitable for wired-OR reset buses or level-shifting interfaces | Select when driving single-load µP reset pin directly and board layout prohibits pull-up resistor placement |
| TPS3808G125DBVR | 2.5V reset threshold, 350ms timeout, 1.8–6V supply, 1.2µA quiescent current - no battery switchover function | Lacks BATT/OUT switchover; only provides reset generation - requires external diode-OR or ideal diode for backup power | Choose when battery backup is unnecessary and lower supply current (<1.5µA) is prioritized over dual-rail support |
Compared with MAX6361PUT23+T, the HUT23+T variant offers push-pull drive for simpler single-load interfacing, while the TPS3808G125DBVR trades integrated battery switchover for ultra-low quiescent current and higher reset threshold - making it suitable only for non-backup applications requiring minimal power draw.
Availability
MAX6361PUT23+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart meter data loggers, and handheld test equipment requiring stable component supply across extended product lifecycles.
Supply support for MAX6361PUT23+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 interface applications in industrial, automotive, and computing markets.
The MAX6361–MAX6364 family was engineered specifically for µP-based systems needing integrated power monitoring, manual reset, and battery-backed SRAM retention - targeting space- and power-constrained portable and industrial equipment.
FAQ
What is the exact reset threshold voltage of the MAX6361PUT23+T?
The MAX6361PUT23+T has a factory-trimmed reset threshold of 2.32V, with guaranteed tolerance of ±1.5% over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and does not require external calibration. The threshold remains stable under load and is specified with VCC falling at 10V/ms. No external components are needed to achieve this precision.
Does the MAX6361PUT23+T support battery switchover, and how does it work?
Yes, the MAX6361PUT23+T supports automatic battery switchover via its BATT and OUT pins. When VCC falls below the 2.32V reset threshold and also drops at least 20mV below VBATT, the internal MOSFET connects BATT to OUT. A 40mV hysteresis prevents oscillation during slow VCC decay. The device draws only 0.02µA from the battery in standby, enabling multi-year operation on a CR2032 cell.
Can the MAX6361PUT23+T operate with a 1.2V supply, and what functions remain active?
Yes, the MAX6361PUT23+T guarantees full functionality down to VCC = 1.2V, including RESET assertion, MR input detection, and battery switchover control. The RESET output remains valid (low during fault), and the 150ms timeout timer operates correctly. This capability ensures robust brownout response in ultra-low-voltage systems such as energy-harvesting sensors or deep-sleep microcontrollers.
What is the purpose of the MR pin on the MAX6361PUT23+T, and does it require external components?
The MR (Manual Reset) pin on the MAX6361PUT23+T provides hardware-initiated reset independent of VCC monitoring. A logic-low pulse >1µs asserts RESET for ≥150ms after MR returns high. An internal 20kΩ pull-up to VCC eliminates the need for external resistors. A normally-open momentary switch between MR and GND suffices - no debounce circuitry or firmware handling is required due to built-in digital filtering.
How does the MAX6361PUT23+T handle power supply transients, and what is its immunity specification?
The MAX6361PUT23+T provides inherent immunity to short-duration negative-going VCC transients. At 100mV overdrive (i.e., VCC dropping 100mV below 2.32V), it tolerates transients up to 30µs without asserting RESET. Immunity improves with smaller overdrive amplitudes. Adding a 0.1µF ceramic capacitor close to the VCC pin further enhances noise rejection, making the MAX6361PUT23+T suitable for electrically noisy industrial environments.
MAX6361PUT23+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- 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
MAX6361PUT23+T FAQ
1.How can I place an order for MAX6361PUT23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361PUT23+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 MAX6361PUT23+T reliable?
The price and inventory of MAX6361PUT23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361PUT23+T is usually 5 days.
3.What payment methods are accepted for MAX6361PUT23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361PUT23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361PUT23+T?
MAX6361PUT23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361PUT23+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 MAX6361PUT23+T?
For technical support, including MAX6361PUT23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361PUT23+T requirements.
6.How does Aetrix verify that MAX6361PUT23+T is sourced from the original manufacturer or authorized distributors?
All MAX6361PUT23+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 MAX6361PUT23+T meets industry standards.
7.What is the process for return or replacement of MAX6361PUT23+T?
All MAX6361PUT23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361PUT23+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 MAX6361PUT23+T part is unused and in its original packaging.
Return procedure for MAX6361PUT23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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