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Analog Devices Inc./Maxim Integrated MAX6362PUT31+T
- Part No.:
- MAX6362PUT31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6362PUT31+T.pdf
- Description:
- IC SUPERVISOR MPU LP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,645
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Product details
Overview
MAX6362PUT31+T from Maxim Integrated is a low-power microprocessor supervisory circuit with integrated watchdog timer, designed for battery-backed µP systems requiring reliable power monitoring and fail-safe reset generation. It operates from +1.2V supply, features factory-preset 3.08V reset threshold, 1.6s watchdog timeout, and active-low open-drain reset output - enabling robust brownout protection and SRAM backup control in portable instrumentation.
For engineers reviewing the MAX6362PUT31+T datasheet, MAX6362PUT31+T pinout, MAX6362PUT31+T application, or MAX6362PUT31+T equivalent, key selection criteria include guaranteed reset assertion down to 1.2V, 150ms minimum reset timeout, watchdog input (WDI) timing behavior, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6362PUT31+T implements a dedicated watchdog timer with 1.6s nominal timeout (1.0–2.25s over temperature), triggered by sustained high/low states on WDI - not edge-triggered. Its reset logic asserts an active-low open-drain signal when VCC falls below 3.08V, MR is pulled low, or WDI remains static beyond timeout.
It integrates dual-path power switching: OUT sources from VCC above reset threshold, and automatically switches to BATT (with 40mV hysteresis) when VCC drops below VBATT and VTH - supporting uninterrupted SRAM retention during power failure without external MOSFETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±1.5% - ensures reliable detection of 3.3V rail brownout before µP instability |
| Watchdog Timeout | 1.6s typical (1.0–2.25s range) - balances fault detection speed against false triggers in noisy environments |
| Reset Timeout Period | 150ms minimum - guarantees µP reset hold time meets boot initialization requirements |
| Supply Voltage Range | +1.2V to +5.5V - supports operation directly from Li+ battery or low-voltage logic rails |
| Quiescent Current | 11µA at VCC = 2.8V - enables multi-year battery life in always-on backup mode |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration and level-shifting with external pull-up |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive cabin applications |
Pinout & Package
MAX6362PUT31+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, 21-0058), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated assembly and thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Asserts low during VCC undervoltage, WDI timeout, or power-up; requires external pull-up for logic-high state |
| 2: GND | Ground reference | Common return path for all internal circuits and OUT current sink |
| 3: WDI | Watchdog input | Edge-sensitive input; reset triggered if held static >1.6s - used to monitor µP software execution |
| 4: VCC | Main supply input | Primary power source; reset asserted when voltage falls below 3.08V |
| 5: OUT | Power output | Switches between VCC and BATT to maintain SRAM supply during brownout; supports up to 150mA from VCC |
| 6: BATT | Battery backup input | Backup source; connects to OUT only when VCC < VBATT − 20mV - prevents backfeed and enables seamless switchover |
Key Features
| Feature | Design Value |
|---|---|
| Watchdog timer with 1.6s timeout | Enables autonomous µP recovery from software hangs without host intervention |
| Factory-trimmed 3.08V reset threshold | Eliminates external resistor networks for 3.3V system monitoring - reduces BOM count and layout area |
| 150ms minimum reset timeout | Guarantees sufficient hold time for µP power-on reset sequencing across voltage ramp rates |
| 1.2V minimum operating voltage | Permits direct connection to single-cell Li+ batteries (2.8–4.2V) or low-dropout regulator outputs |
| Automatic battery switchover with 40mV hysteresis | Prevents oscillation during slow VCC decay - ensures clean transition to backup power |
Applications
| Portable Medical Instrumentation | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Handheld blood glucose meters requiring persistent memory retention during battery replacement. IC Role / Device Role / Timing Role: Supervisory IC providing SRAM backup power switchover and watchdog-monitored firmware execution. Use Value: Prevents data loss during hot-swap battery changes via seamless BATT→OUT switching and guarantees safe reboot after software lockup. | Use Scenario: DIN-rail mounted programmable logic controller modules operating in unregulated 24V DC environments. IC Role / Device Role / Timing Role: Power supervisor detecting 3.3V logic rail brownout and asserting reset to prevent corrupted I/O state transitions. Use Value: 3.08V threshold matches 3.3V LDO tolerance; 150ms reset timeout exceeds µP boot requirement; 1.2V operation supports deep brownout recovery. |
| Smart Energy Meters | Point-of-Sale Terminals |
Use Scenario: Electricity meters with real-time clock and nonvolatile memory needing tamper-proof power-fail response. IC Role / Device Role / Timing Role: Dual-function supervisor: monitors main supply and triggers watchdog reset if metering firmware stalls. Use Value: WDI input tied to µP timer interrupt line ensures firmware liveness; 11µA quiescent current extends supercapacitor hold-up time. | Use Scenario: Retail terminals powered by AC adapters subject to intermittent outages and ESD events. IC Role / Device Role / Timing Role: Reset generator with transient immunity - suppresses false resets from sub-30µs VCC glitches. Use Value: Negative-going transient immunity graph confirms 100mV overdrive withstands 30µs spikes - eliminates spurious reboots during adapter plug/unplug. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6362HUT31+T | Same 3.08V threshold and watchdog function, but offered in leaded (non-RoHS) SOT23-6 package | Identical electrical behavior; differs only in Pb content and JEDEC marking - suitable where RoHS exemption applies | Select when legacy compliance or solderability testing with SnPb paste is required |
| TPS3808G33DBVR | 3.3V reset threshold, 200ms reset timeout, no integrated watchdog - requires external timing components for watchdog functionality | Lacks WDI input; used where simple reset supervision suffices and watchdog is implemented in firmware or separate IC | Choose for cost-sensitive designs without watchdog need or where longer reset timeout improves noise immunity |
Compared with MAX6362PUT31+T, MAX6362HUT31+T offers identical supervision functionality in a leaded package for legacy manufacturing, while TPS3808G33DBVR provides lower-cost basic reset capability but requires external circuitry to replicate watchdog behavior - making MAX6362PUT31+T optimal for integrated reliability in battery-backed µP systems.
Availability
MAX6362PUT31+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial control modules, smart energy meters, and point-of-sale terminals requiring stable component supply across extended production lifecycles.
Supply support for MAX6362PUT31+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 semiconductor design house specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6361–MAX6364 family was engineered specifically for µP-based systems needing integrated power monitoring, battery switchover, and watchdog functionality in ultra-small packages - targeting portable, battery-powered, and space-constrained embedded applications.
FAQ
What is the exact reset threshold voltage of the MAX6362PUT31+T?
The MAX6362PUT31+T has a factory-trimmed reset threshold of 3.08V, with ±1.5% tolerance over temperature. This value is confirmed in the Ordering Information table and Electrical Characteristics section of the datasheet, corresponding to the "31" suffix. It is guaranteed to monitor 3.3V supply rails accurately under all operating conditions from -40°C to +85°C.
Does the MAX6362PUT31+T include a watchdog timer, and how does it operate?
Yes, the MAX6362PUT31+T integrates a watchdog timer with a nominal 1.6s timeout period (1.0–2.25s over temperature). It monitors the WDI pin: if WDI remains static (high or low) beyond the timeout, a reset pulse is generated. Edges on WDI clear the timer - enabling flexible software-driven watchdog refresh without fixed-frequency constraints.
Can the MAX6362PUT31+T operate from a single-cell Li+ battery without additional regulation?
Yes, the MAX6362PUT31+T operates from +1.2V to +5.5V, covering the full discharge range of a single Li+ cell (2.8V–4.2V). Its 11µA quiescent current at 2.8V and guaranteed 1.2V operation allow direct connection to the battery, eliminating the need for intermediate LDOs in backup power paths.
What is the function of the OUT pin on the MAX6362PUT31+T, and what load can it drive?
The OUT pin on the MAX6362PUT31+T delivers regulated power to external circuitry - sourcing from VCC when valid, or from BATT during brownout. It supports up to 150mA from VCC and maintains SRAM retention during power failure. The internal MOSFET's on-resistance varies with VBATT (e.g., 2.75Ω at 4.5V, 4.6Ω at 2.25V), limiting max continuous current in battery mode.
Is the MAX6362PUT31+T pin-compatible with other devices in the MAX6361–MAX6364 family?
No - while all MAX6361–MAX6364 devices share the same SOT23-6 package and pinout, the MAX6362PUT31+T is functionally distinct due to its dedicated WDI input (pin 3). Substituting a MAX6361 (MR input) or MAX6364 (RESET IN) would misroute signals and disable core functionality. Pin compatibility exists only within the same variant group (e.g., MAX6362HUT31+T).
MAX6362PUT31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX6362PUT31+T FAQ
1.How can I place an order for MAX6362PUT31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6362PUT31+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 MAX6362PUT31+T reliable?
The price and inventory of MAX6362PUT31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6362PUT31+T is usually 5 days.
3.What payment methods are accepted for MAX6362PUT31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6362PUT31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6362PUT31+T?
MAX6362PUT31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6362PUT31+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 MAX6362PUT31+T?
For technical support, including MAX6362PUT31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6362PUT31+T requirements.
6.How does Aetrix verify that MAX6362PUT31+T is sourced from the original manufacturer or authorized distributors?
All MAX6362PUT31+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 MAX6362PUT31+T meets industry standards.
7.What is the process for return or replacement of MAX6362PUT31+T?
All MAX6362PUT31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6362PUT31+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 MAX6362PUT31+T part is unused and in its original packaging.
Return procedure for MAX6362PUT31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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