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Analog Devices Inc./Maxim Integrated MAX6361HUT23+
- Part No.:
- MAX6361HUT23+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361HUT23+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,934
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Product details
Overview
MAX6361HUT23+ 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, guarantees RESET/RESET validity down to 1.2V, and delivers 150ms minimum reset timeout - used in portable/battery-powered equipment for reliable SRAM backup during brownout.
For engineers reviewing the MAX6361HUT23+ datasheet, MAX6361HUT23+ pinout, MAX6361HUT23+ application, or MAX6361HUT23+ equivalent, key selection criteria include manual reset debounce capability, VCC-to-OUT on-resistance (≤2.7Ω at 2.38V), battery switchover hysteresis (40mV), guaranteed 1.2V operation, and SOT23-6 package compatibility with space-constrained µP systems.
Technical Context
The MAX6361HUT23+ integrates a precision voltage monitor, debounced manual reset input (MR) with internal 20kΩ pull-up, and dual-path power routing: OUT sources from VCC when above reset threshold, or from BATT when VCC falls below threshold and VBATT exceeds VCC by ≥20mV. Its reset assertion logic combines VCC monitoring, MR state, and reset timeout timing.
It implements a fixed 150ms reset-active timeout period after VCC recovery or MR release, supports reset output in active-low open-drain configuration (per ordering suffix 'H'), and maintains functional integrity across -40°C to +85°C with <1µA battery standby current at 2.8V VBATT and 0V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V (factory-preset, ±1.5% over temperature) - sets precise brownout detection point for +2.5V systems |
| Supply Voltage Range | +1.2V to +5.5V (VCC or VBATT) - enables operation directly from single-cell Li+ or NiMH batteries |
| Reset Timeout Period | 150ms (minimum) - ensures µP initialization completes before release, preventing premature code execution |
| Supply Current (VCC) | 10µA (typical at 2.8V, +25°C) - minimizes system quiescent power in always-on monitoring applications |
| Battery Standby Current | 0.02µA (typical at +25°C) - extends backup battery life beyond 10 years in low-duty-cycle SRAM hold applications |
| VCC-to-OUT On-Resistance | 2.7Ω (max at VCC = 2.38V, IOUT = 25mA) - limits voltage drop and power loss during primary supply operation |
| MR Input Pull-Up | 20kΩ (internal to VCC) - eliminates external components for momentary switch interface; supports TTL/CMOS drive |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, RoHS-compliant, 2.0mm × 1.25mm footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Asserts low during VCC undervoltage, MR low, or after reset timeout; requires external pull-up for logic-level compatibility |
| 2: GND | Ground reference | Common return path for VCC, BATT, and all internal circuitry; must be low-impedance for noise immunity |
| 3: MR | Manual reset input | Debounced logic input; low pulse ≥1µs asserts reset; internal 20kΩ pull-up to VCC enables switch-to-GND interface |
| 4: VCC | Main supply input | Primary power source; reset asserted when VCC < 2.32V; powers internal circuitry and drives OUT when active |
| 5: OUT | Power output | Switches between VCC and BATT based on voltage comparison; supplies up to 150mA to SRAM or real-time clock |
| 6: BATT | Backup battery input | Connects to secondary battery; activates OUT sourcing when VCC drops 20mV below VBATT, with 40mV hysteresis |
Key Features
| Feature | Design Value |
|---|---|
| Debounced Manual Reset Input | Eliminates need for external RC filter or Schmitt trigger; supports direct connection of mechanical switch to MR–GND |
| Guaranteed 1.2V Operation | Ensures functional reset assertion even during deep brownout or single-cell battery discharge down to 1.2V |
| Battery Switchover Hysteresis | 40mV (VBATT – VCC) prevents oscillation during slow VCC ramp-down; enables clean transition to backup power |
| Low Battery Standby Current | Sub-100nA IBATT at +25°C allows >10-year shelf life for coin-cell–backed memory retention |
| Power-Supply Transient Immunity | Rejects negative-going VCC glitches ≤30µs at 100mV overdrive - avoids spurious resets in noisy industrial environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable glucose monitor retaining calibration data during battery replacement. IC Role / Device Role / Timing Role: Supervisory circuit providing seamless SRAM power switchover from main Li+ cell to backup coin cell upon main supply disconnect. Use Value: Prevents data corruption using 2.32V threshold aligned with Li+ discharge curve and 40mV hysteresis to avoid chatter during transition. | Use Scenario: Remote I/O module operating in unregulated 24V DC field wiring with voltage sags. IC Role / Device Role / Timing Role: Brownout detector asserting reset before µP executes invalid instructions due to marginal VCC. Use Value: 150ms guaranteed reset hold time ensures full µP reinitialization; 1.2V operation tolerates worst-case sag to 2.3V on 3.3V rail. |
| Smart Meter RTC Backup | Handheld Test Equipment |
Use Scenario: Electricity meter maintaining accurate time-of-use logging during AC mains failure. IC Role / Device Role / Timing Role: Dual-supply supervisor routing power from main supply to RTC/SRAM, then switching to backup battery without interruption. Use Value: <100nA battery standby current extends CR2032 life beyond 10 years; VCC-to-OUT RON ≤2.7Ω minimizes voltage droop under load. | Use Scenario: Portable oscilloscope preserving setup parameters during battery hot-swap. IC Role / Device Role / Timing Role: Manual reset initiator triggered by front-panel button press, with hardware-debounced MR input. Use Value: Internal 20kΩ MR pull-up removes external components; 1µs minimum MR pulse width enables fast, reliable user-initiated reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT26+ | Higher 2.55V reset threshold; identical pinout, timing, and battery switchover behavior | Suitable for +3.0V or +3.3V systems where tighter margin above 2.5V rail is required | Select when system VCC nominal is ≥2.7V and brownout detection must occur closer to rail minimum |
| TPS3808G125DBVR | Fixed 1.25V reset threshold; no battery switchover; push-pull or open-drain output selectable | Lacks BATT/OUT switching function; intended for simple reset-only applications without backup power management | Choose only if battery backup is unnecessary and lower reset threshold aligns with ultra-low-voltage µP requirements |
Compared with MAX6361HUT23+, MAX6361HUT26+ shifts brownout detection upward for higher-rail systems, while TPS3808G125DBVR omits battery management entirely - making MAX6361HUT23+ uniquely suited for compact, battery-backed SRAM hold with precise 2.32V trip point.
Availability
MAX6361HUT23+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter RTC backup, and handheld test equipment requiring stable component supply with long-term lifecycle support.
Supply support for MAX6361HUT23+ 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, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.
The MAX6361–MAX6364 family targets space-constrained microprocessor systems needing integrated reset, manual reset, and battery switchover - specifically optimized for portable, battery-powered, and mission-critical embedded devices.
FAQ
What is the exact reset threshold voltage of the MAX6361HUT23+?
The MAX6361HUT23+ has a factory-preset reset threshold of 2.32V, with ±1.5% tolerance over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix "23". The MAX6361HUT23+ does not support user adjustment of this threshold.
Does the MAX6361HUT23+ support battery backup switchover, and what are the activation conditions?
Yes, the MAX6361HUT23+ supports automatic battery backup switchover. Activation requires two simultaneous conditions: VCC must fall below the 2.32V reset threshold, and VBATT must exceed VCC by at least 20mV. Once engaged, OUT is sourced from BATT with 40mV hysteresis to prevent oscillation. The MAX6361HUT23+ does not provide a BATT ON indicator signal - that function is exclusive to the MAX6363 variant.
What output type does the MAX6361HUT23+ feature, and how is it configured?
The MAX6361HUT23+ features an active-low open-drain RESET output, indicated by the "H" in its part number suffix (HUT23+). It requires an external pull-up resistor to a valid logic rail (e.g., VCC or another supply) to generate a high level when deasserted. This configuration supports wired-OR reset buses and level translation across different voltage domains - a key design feature of the MAX6361HUT23+.
Can the manual reset input (MR) of the MAX6361HUT23+ be left unconnected, and what is its default state?
Yes, the MR pin of the MAX6361HUT23+ can be left unconnected. It features an internal 20kΩ pull-up resistor to VCC, holding MR at logic high under normal operation. A logic-low pulse ≥1µs on MR asserts reset, and reset remains active for ≥150ms after MR returns high. Leaving MR unconnected disables manual reset functionality - the MAX6361HUT23+ will still perform power-on and brownout reset autonomously.
Is the MAX6361HUT23+ compatible with lead-free PCB assembly processes?
Yes, the MAX6361HUT23+ is RoHS-compliant and qualified for lead-free reflow soldering. Its SOT23-6 package supports peak reflow temperatures up to +260°C (per JEDEC J-STD-020), matching standard Pb-free process profiles. The "+" suffix explicitly denotes lead-free packaging, and the device meets IPC/JEDEC standards for moisture sensitivity level (MSL) 1 - enabling uncomplicated integration into modern high-reliability manufacturing lines using the MAX6361HUT23+.
MAX6361HUT23+ 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 High
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6361HUT23+ FAQ
1.How can I place an order for MAX6361HUT23+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361HUT23+ 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 MAX6361HUT23+ reliable?
The price and inventory of MAX6361HUT23+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361HUT23+ is usually 5 days.
3.What payment methods are accepted for MAX6361HUT23+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361HUT23+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361HUT23+?
MAX6361HUT23+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361HUT23+ 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 MAX6361HUT23+?
For technical support, including MAX6361HUT23+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361HUT23+ requirements.
6.How does Aetrix verify that MAX6361HUT23+ is sourced from the original manufacturer or authorized distributors?
All MAX6361HUT23+ 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 MAX6361HUT23+ meets industry standards.
7.What is the process for return or replacement of MAX6361HUT23+?
All MAX6361HUT23+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361HUT23+, 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 MAX6361HUT23+ part is unused and in its original packaging.
Return procedure for MAX6361HUT23+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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