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Analog Devices Inc./Maxim Integrated MAX6361HUT23+T
- Part No.:
- MAX6361HUT23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361HUT23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX6361HUT23+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, active-low open-drain reset output, and supports SRAM backup in brownout conditions for embedded controllers and portable equipment.
For engineers reviewing the MAX6361HUT23+T datasheet, MAX6361HUT23+T pinout, MAX6361HUT23+T application, or MAX6361HUT23+T equivalent, key selection criteria include guaranteed reset assertion down to 1.2V, debounced manual reset input with internal 20kΩ pull-up, ±25nA RESET IN leakage, 100ns glitch immunity, and SOT23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6361HUT23+T integrates precision voltage monitoring, manual reset control, and battery-backed power switchover in a single BiCMOS IC. Its reset comparator uses a trimmed bandgap reference to achieve ±1.5% threshold accuracy over -40°C to +85°C, and the MR input includes internal debouncing logic with 120ns propagation delay and 1µs minimum pulse width tolerance.
It implements dual-path power routing: OUT connects to VCC when VCC > VTH and switches to BATT when VCC falls below VTH and VBATT exceeds VCC by ≥20mV. The device guarantees RESET/RESET validity down to 1.2V on either VCC or VBATT, with 150ms reset timeout and 35ms typical VCC-to-RESET propagation delay at 10V/ms slew rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V (factory-preset, ±1.5% over temperature) - ensures reliable detection of 2.5V system brownout |
| Supply Voltage Range | +1.2V to +5.5V on VCC or VBATT - enables operation directly from Li+ battery or low-voltage rails |
| Reset Timeout Period | 150ms minimum - meets µP power-up stabilization requirements for most 8-/16-bit microcontrollers |
| Supply Current | 10µA typical at +25°C, 30µA max over full temperature range - extends battery life in always-on backup mode |
| MR Input Pull-Up | 20kΩ internal resistor to VCC - eliminates external components for momentary switch interface |
| Glitch Immunity | 100ns - prevents false resets from EMI or short transients on MR or VCC lines |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
MAX6361HUT23+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, 2.1mm × 1.6mm footprint), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Drives µP reset input low during power failure, manual reset, or brownout; requires external pull-up |
| 2: GND | Ground reference | Common return path for VCC, BATT, and all internal circuitry; must be low-impedance connection |
| 3: MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC; debounced with 120ns delay |
| 4: VCC | Main supply input | Primary power source (1.2V–5.5V); monitored for reset threshold violation; powers internal circuitry |
| 5: OUT | Power output | Switches between VCC and BATT; supplies SRAM or real-time clock during main supply loss |
| 6: BATT | Backup battery input | Accepts 1.2V–5.5V battery; activates switchover when VCC < VTH and VBATT > VCC + 20mV |
Key Features
| Feature | Design Value |
|---|---|
| Low operating voltage | Functions fully at +1.2V on VCC or VBATT - supports single-cell Li+ and NiMH battery systems |
| Debounced manual reset | Internal 20kΩ pull-up and 120ns propagation delay eliminate need for external RC debounce network |
| Battery switchover hysteresis | 40mV (20mV turn-on + 20mV turn-off) - prevents oscillation during slow VCC decay near threshold |
| Reset output validity | RESET remains functional down to 1.2V supply - ensures deterministic reset behavior during deep brownout |
| Transient immunity | Withstands 100mV VCC undershoot for up to 30µs without asserting reset - reduces false triggers in noisy environments |
Applications
| Industrial PLC Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Maintaining SRAM contents during AC mains interruption or battery swap in programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory circuit providing VCC brownout detection, manual reset initiation, and seamless BATT-to-OUT switchover. Use Value: Prevents program corruption and data loss by guaranteeing 150ms reset hold time and 2.32V threshold accuracy across -40°C to +85°C. |
Use Scenario: Preserving patient parameter history and calibration data during battery replacement in handheld glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Dual-supply supervisor enabling continuous memory retention via BATT-powered OUT rail while main supply is disconnected. Use Value: Achieves <1µA battery standby current and 1.2V operational floor - extends single-CR2032 battery life beyond 2 years in sleep mode. |
| POS Terminal Power Management | Smart Energy Meters |
Use Scenario: Safeguarding transaction logs and firmware state during unexpected power loss in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Reset generator and power-path controller that asserts RESET before VCC drops below 2.32V and routes BATT to critical memory. Use Value: Eliminates need for discrete diodes, MOSFETs, and comparators - reduces BOM count by 7 components and saves 3.2mm² PCB area. |
Use Scenario: Securing metering registers and time-of-use billing data during grid outage or tamper-induced power cut in residential electricity meters. IC Role / Device Role / Timing Role: Precision voltage monitor with 150ms reset timeout and battery switchover, interfacing directly with metrology SoC reset pin. Use Value: Meets IEC 62053-21 Class 0.5S timing requirements with ±1.5% reset threshold tolerance over full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT26+T | Factory-preset 2.55V reset threshold (vs. 2.32V) | Better suited for +2.7V or +3.0V systems requiring higher trip point | Select when system VCC nominal is ≥2.7V and brownout margin must exceed 15% |
| TPS3808G125DBVR | 2.5V fixed threshold, 200ms reset timeout, 1.8V min supply, push-pull output | Lacks manual reset input and battery switchover; designed for simpler reset-only use cases | Choose only if battery backup is unnecessary and push-pull drive is required for µP with no external pull-up |
Compared with MAX6361HUT23+T, the MAX6361HUT26+T offers identical functionality with higher reset threshold for tighter 2.7V system margins, while TPS3808G125DBVR provides longer reset timeout and lower supply voltage but omits MR and BATT switchover - making it unsuitable for SRAM backup applications.
Availability
MAX6361HUT23+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, POS terminals, smart energy meters, and battery-backed instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for MAX6361HUT23+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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX6361–MAX6364 family was developed specifically for microprocessor systems needing integrated power monitoring, manual reset, and battery-backed memory retention in ultra-small form factors.
FAQ
What is the exact reset threshold voltage of MAX6361HUT23+T?
The MAX6361HUT23+T has a factory-trimmed reset threshold of 2.32V, with ±1.5% accuracy 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 of the official datasheet. The "23" suffix in MAX6361HUT23+T explicitly denotes the 2.32V variant.
Does MAX6361HUT23+T support battery backup switchover, and what are the activation conditions?
Yes, MAX6361HUT23+T supports automatic battery switchover. It activates backup mode when two conditions are met simultaneously: VCC falls below the 2.32V reset threshold, and VBATT exceeds VCC by at least 20mV. Once engaged, OUT is sourced from BATT until VCC rises 20mV above VBATT, providing hysteresis to prevent chattering during slow recovery.
Can MAX6361HUT23+T operate from a single-cell lithium battery?
Yes, MAX6361HUT23+T operates from supply voltages as low as +1.2V on either VCC or VBATT, making it compatible with discharged single-cell Li+ (2.7V–4.2V) or NiMH (0.9V–1.4V per cell) batteries. Its 10µA typical supply current and sub-1µA battery standby draw ensure multi-year operation from common coin cells like CR2032.
What is the function of the MR pin on MAX6361HUT23+T, and does it require external components?
The MR (Manual Reset) pin on MAX6361HUT23+T is an active-low input that asserts reset when pulled low. It includes an internal 20kΩ pull-up resistor to VCC, so no external pull-up is needed. A normally-open momentary switch from MR to GND provides full manual reset capability - no debounce circuitry or capacitors are required unless operating in high-noise environments.
Is MAX6361HUT23+T pin-compatible with other members of the MAX6361–MAX6364 family?
Yes, all MAX6361–MAX6364 variants share identical SOT23-6 pinout and footprint (U6-1). The MAX6361HUT23+T is functionally pin-compatible with MAX6361HUT26+T, MAX6361HUT29+T, and other HUT/PUT/LUT variants - differing only in reset threshold, output type (push-pull vs. open-drain), and feature set (e.g., WDI or BATT ON presence), not pin assignment or electrical interface.
MAX6361HUT23+T 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+T FAQ
1.How can I place an order for MAX6361HUT23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361HUT23+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 MAX6361HUT23+T reliable?
The price and inventory of MAX6361HUT23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361HUT23+T is usually 5 days.
3.What payment methods are accepted for MAX6361HUT23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361HUT23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361HUT23+T?
MAX6361HUT23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361HUT23+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 MAX6361HUT23+T?
For technical support, including MAX6361HUT23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361HUT23+T requirements.
6.How does Aetrix verify that MAX6361HUT23+T is sourced from the original manufacturer or authorized distributors?
All MAX6361HUT23+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 MAX6361HUT23+T meets industry standards.
7.What is the process for return or replacement of MAX6361HUT23+T?
All MAX6361HUT23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361HUT23+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 MAX6361HUT23+T part is unused and in its original packaging.
Return procedure for MAX6361HUT23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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