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Analog Devices Inc./Maxim Integrated MAX6362PUT23+
- Part No.:
- MAX6362PUT23+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6362PUT23+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,266
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Product details
Overview
MAX6362PUT23+ from Maxim Integrated is a low-power microprocessor supervisory circuit with integrated watchdog timer, designed for battery-backed SRAM power management in embedded systems. It operates from +1.2V supply, features factory-preset 2.32V reset threshold, 1.6s watchdog timeout, 150ms minimum reset timeout, and active-low open-drain RESET output - enabling reliable brownout detection and µP reset assertion in portable instrumentation and industrial controllers.
For engineers reviewing the MAX6362PUT23+ datasheet, MAX6362PUT23+ pinout, MAX6362PUT23+ application, or MAX6362PUT23+ equivalent, key selection criteria include its SOT23-6 package, guaranteed RESET/RESET validity down to 1.2V, VCC-to-OUT on-resistance ≤2.7Ω at 2.38V, battery switchover hysteresis of 40mV, and immunity to transients up to 30µs when VCC dips 100mV below threshold.
Technical Context
The MAX6362PUT23+ implements a dedicated watchdog timer with 1.6s timeout (1.0–2.25s over temperature), triggered by sustained high/low state on WDI - cleared only by rising or falling edges within the timeout window. Its internal comparator monitors VCC against a precision 2.32V threshold (±1.5% over -40°C to +85°C), asserting RESET when VCC falls below threshold or WDI stalls.
Battery switchover logic activates when VCC drops below both the reset threshold and VBATT by ≥20mV, connecting BATT to OUT via an internal MOSFET with on-resistance of 2.7Ω (at VBATT = 2.25V, IOUT = 5mA). The device guarantees RESET assertion during power-up, power-down, and brownout, with propagation delay <280µs and glitch immunity of 100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±1.5% - ensures reliable detection of 2.5V system brownout before µP malfunction |
| Watchdog Timeout | 1.6s typical (1.0–2.25s range) - provides sufficient margin for firmware execution loops without false triggers |
| Reset Timeout Period | 150ms minimum - guarantees µP remains held in reset long enough for stable power recovery |
| Supply Current | 15µA at VCC = 5.5V - enables multi-year operation from coin-cell backup in always-on monitoring |
| VCC Operating Range | +1.2V to +5.5V - supports direct interface with 1.2V, 1.8V, 2.5V, 3.3V, and 5V µP domains |
| Battery Switchover Hysteresis | 40mV - prevents oscillation during slow VCC decay near VBATT voltage |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration with other reset sources |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, RoHS-compliant (+ suffix), footprint compatible with JEDEC MO-178AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return path for all internal circuits; must be low-impedance connection to system ground plane |
| VCC | Main supply input | Primary power source (1.2–5.5V); powers internal logic and drives OUT when above reset threshold |
| WDI | Watchdog timer input | Edge-sensitive input requiring ≥100ns pulse width; reset triggered if static for >1.6s |
| BATT | Backup battery input | Connects to Li+ or alkaline cell; automatically powers OUT when VCC falls below VBATT −20mV |
| OUT | Power output | Switched output sourcing from VCC or BATT; delivers up to 150mA at VCC = 4.75V |
| RESET | Active-low reset output | Open-drain output pulled low during reset; requires external pull-up to VCC or another rail |
Key Features
| Feature | Design Value |
|---|---|
| Watchdog timer with 1.6s timeout | Enables autonomous firmware health monitoring without µP intervention - critical for unattended remote sensors |
| Guaranteed RESET/RESET operation down to 1.2V | Ensures valid reset signaling even during deep brownout or battery depletion, preventing undefined µP states |
| 40mV battery switchover hysteresis | Eliminates chattering during gradual VCC decay, preserving SRAM data integrity during power transitions |
| 150ms minimum reset timeout | Meets JEDEC JESD8-12B requirement for µP power-on reset duration across full temperature range |
| 100ns glitch immunity on MR/WDI inputs | Rejects EMI-induced noise on control lines without external RC filtering - reduces BOM count |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous vital-sign logging in battery-powered ECG devices with nonvolatile SRAM storage. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers watchdog reset if firmware hangs; switches SRAM to coin-cell backup during AC loss. Use Value: Prevents data corruption during power interruption and ensures automatic recovery after brownout - meeting IEC 60601-1 safety timing requirements. |
Use Scenario: Remote analog input modules operating in harsh factory environments with fluctuating 24V DC supplies. IC Role / Device Role / Timing Role: Monitors 5V logic rail for undervoltage; asserts reset before µP executes corrupted code due to supply sag. Use Value: Provides deterministic 150ms reset hold time and 2.32V threshold accuracy to maintain functional safety integrity per IEC 61508 SIL-2. |
| Smart Utility Meters | POS Terminal Battery Backup |
Use Scenario: AMI meters storing tariff data and consumption logs in battery-backed SRAM during grid outages. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse and initiates seamless switchover to supercapacitor backup while asserting µP reset. Use Value: Achieves <1µA battery standby current and 2.7Ω BATT-to-OUT on-resistance - extending 10-year meter lifetime. |
Use Scenario: Retail point-of-sale terminals maintaining transaction buffer integrity during brief AC interruptions. IC Role / Device Role / Timing Role: Watches µP activity via WDI; resets system if payment processing stalls, preventing duplicate or lost transactions. Use Value: Combines 1.6s watchdog and 2.32V precision reset to eliminate manual reboot while ensuring PCI PTS compliance for secure boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6362HUT23+ | Same electrical specs, but offered in leaded (not lead-free) SOT23-6 package | Not suitable for RoHS-compliant production; identical functionality in legacy assembly lines | Select only if leaded solder process is mandated and RoHS exemption applies |
| TPS3808G125DBVR | Fixed 1.25V reset threshold, no watchdog timer, 350ms reset timeout, 1.5µA quiescent current | Lacks battery switchover and watchdog - limited to basic power-monitoring use cases | Choose when only undervoltage detection is needed and ultra-low current dominates design priority |
Compared with MAX6362PUT23+, MAX6362HUT23+ offers identical supervision functionality but requires leaded assembly, while TPS3808G125DBVR trades watchdog capability and battery support for lower supply current and simpler integration in non-backup applications.
Availability
MAX6362PUT23+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart utility meters, and POS terminal battery backup requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6362PUT23+ 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 industrial, automotive, communications, and computing markets, with emphasis on reliability and integration.
The MAX6362PUT23+ belongs to the MAX6361–MAX6364 family of low-power µP supervisory circuits engineered specifically for battery-backed SRAM power management and watchdog-based firmware supervision in space-constrained embedded systems.
FAQ
What is the watchdog timeout period for MAX6362PUT23+?
The MAX6362PUT23+ features a watchdog timeout period of 1.6s typical, with a guaranteed range of 1.0s to 2.25s over the full -40°C to +85°C operating temperature range. This timeout is triggered when the WDI input remains static (high or low) beyond the specified interval, causing a reset pulse on the RESET output for the 150ms minimum timeout period. The MAX6362PUT23+ watchdog clears on any rising or falling edge at WDI, making it suitable for monitoring firmware execution flow in real-time systems.
Does MAX6362PUT23+ support battery switchover, and what is the switchover threshold?
Yes, MAX6362PUT23+ supports automatic battery switchover to preserve SRAM data during main supply failure. Switchover occurs when VCC falls below both the reset threshold (2.32V) and VBATT by at least 20mV - i.e., when VCC ≤ VBATT − 20mV. The device incorporates 40mV hysteresis (VBATT − VCC ≥ 20mV for activation, VCC − VBATT ≥ 20mV for deactivation) to prevent oscillation during slow supply decay. The internal MOSFET connects BATT to OUT with on-resistance as low as 2.7Ω at 2.25V, enabling efficient backup power delivery.
What output type does MAX6362PUT23+ provide, and how should it be interfaced?
MAX6362PUT23+ provides an active-low open-drain RESET output. This requires an external pull-up resistor (typically 10kΩ to VCC or another compatible rail) to generate a valid logic-high level when not asserted. The output sinks up to 20mA and has a VOL of 0.3V at 1.6mA load, ensuring compatibility with TTL and CMOS µP reset inputs. Unlike push-pull variants, this configuration allows multiple MAX6362PUT23+ devices (or other open-drain reset sources) to share a common reset bus using wired-OR logic.
What is the minimum supply voltage required for MAX6362PUT23+ to operate correctly?
MAX6362PUT23+ operates reliably from a minimum supply voltage of +1.2V on either VCC or VBATT, with full functionality including RESET assertion, watchdog monitoring, and battery switchover guaranteed down to this level. The device maintains valid RESET/RESET output states and accurate 2.32V threshold detection even at 1.2V, making it suitable for ultra-low-voltage applications such as energy-harvesting nodes or deeply discharged battery scenarios where other supervisors fail.
How does MAX6362PUT23+ handle power supply transients, and what is its immunity specification?
MAX6362PUT23+ provides robust immunity to negative-going VCC transients: a 100mV dip below the 2.32V reset threshold can last up to 30µs without triggering a false reset, as verified in the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph. This immunity is enhanced by internal circuitry and further improved with a 0.1µF bypass capacitor placed close to the VCC pin. The device also exhibits 100ns input glitch immunity on WDI and MR pins, rejecting EMI without requiring external filtering components.
MAX6362PUT23+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- 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
MAX6362PUT23+ FAQ
1.How can I place an order for MAX6362PUT23+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6362PUT23+ 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 MAX6362PUT23+ reliable?
The price and inventory of MAX6362PUT23+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6362PUT23+ is usually 5 days.
3.What payment methods are accepted for MAX6362PUT23+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6362PUT23+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6362PUT23+?
MAX6362PUT23+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6362PUT23+ 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 MAX6362PUT23+?
For technical support, including MAX6362PUT23+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6362PUT23+ requirements.
6.How does Aetrix verify that MAX6362PUT23+ is sourced from the original manufacturer or authorized distributors?
All MAX6362PUT23+ 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 MAX6362PUT23+ meets industry standards.
7.What is the process for return or replacement of MAX6362PUT23+?
All MAX6362PUT23+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6362PUT23+, 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 MAX6362PUT23+ part is unused and in its original packaging.
Return procedure for MAX6362PUT23+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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