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Analog Devices Inc./Maxim Integrated MAX6361PUT29+T
- Part No.:
- MAX6361PUT29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6361PUT29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,018
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Product details
Overview
MAX6361PUT29+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-preset 2.93V reset threshold, manual reset input (MR), and active-low open-drain RESET output. It operates from +1.2V supply, provides 150ms minimum reset timeout, supports battery switchover for SRAM backup, and is housed in a 6-pin SOT23 package. Used in portable/battery-powered equipment requiring reliable power-up/down monitoring.
For engineers reviewing the MAX6361PUT29+T datasheet, MAX6361PUT29+T pinout, MAX6361PUT29+T application, or MAX6361PUT29+T equivalent, key selection criteria include guaranteed reset assertion down to 1.2V supply, debounced MR input with internal 20kΩ pull-up, ±25nA RESET IN leakage (not applicable here), 100ns glitch immunity, and compatibility with +2.5V/+3.0V/+3.3V/+5.0V supply monitoring.
Technical Context
The MAX6361PUT29+T implements a precision voltage monitor with fixed 2.93V threshold (±1.5% over temperature), a debounced manual reset input with 120ns MR-to-reset delay, and an active-low open-drain RESET output that remains asserted for ≥150ms after VCC rises above threshold. Its internal architecture includes a bandgap reference, comparator with hysteresis, and logic-controlled output stage.
Battery switchover is managed via internal MOSFET control: when VCC falls below both VTH and VBATT by ≥20mV, OUT disconnects from VCC and connects to BATT; recovery requires VCC to rise ≥20mV above VBATT. The device draws only 11µA at VCC = 2.8V and maintains RESET/RESET validity down to 1.2V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% - ensures reliable detection of brownout on +3.0V or +3.3V rails |
| Supply Voltage Range | +1.2V to +5.5V - enables operation directly from single-cell Li+ or NiMH batteries |
| Reset Timeout Period | ≥150ms - guarantees µP reset hold time meets typical boot initialization requirements |
| Supply Current (VCC = 2.8V) | 11µA - minimizes quiescent drain in always-on battery-backed systems |
| MR Input Pull-Up | 20kΩ to VCC - eliminates need for external resistor in manual reset switch interface |
| Glitch Immunity | 100ns - rejects short transients on VCC without false reset assertion |
| Reset Propagation Delay | 120ns (MR to RESET) - supports fast response to operator-initiated reset |
Pinout & Package
Package: 6-pin SOT23 (U6-1, outline 21-0058), RoHS-compliant, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain reset output | Drives µP RESET# input; requires external pull-up; asserts low during power failure or MR activation |
| 2: GND | Ground reference | Common return path for VCC, BATT, and output currents; must be low-impedance |
| 3: MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC; debounced and noise-immune |
| 4: VCC | Main supply input | Primary power source; monitored for reset threshold violation; powers internal circuitry |
| 5: OUT | Power output | Switches between VCC and BATT; supplies SRAM or real-time clock during brownout |
| 6: BATT | Backup battery input | Provides backup power when VCC drops; enables seamless switchover with 40mV hysteresis |
Key Features
| Feature | Design Value |
|---|---|
| Factory-preset 2.93V threshold | Eliminates external resistor network for +3.0V system monitoring; ±1.5% accuracy over full temperature range |
| Debounced MR input with 20kΩ pull-up | Enables direct connection of momentary switch to GND; no external components required for manual reset |
| 150ms minimum reset timeout | Guarantees sufficient hold time for µP initialization sequences across all supply voltages ≥1.2V |
| Battery switchover with 40mV hysteresis | Prevents oscillation during slow VCC ramp-down; ensures clean transition between main and backup power sources |
| 100ns glitch immunity on VCC | Rejects EMI-induced transients without triggering spurious resets in noisy industrial environments |
Applications
| Portable Medical Devices | Industrial PLC Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and handheld diagnostic tools require nonvolatile memory retention during AC power loss or battery swap. IC Role / Device Role / Timing Role: MAX6361PUT29+T monitors main supply and switches SRAM to backup battery within 1µs of VCC drop, asserting RESET# to halt processor execution. Use Value: Prevents data corruption during power transitions; 11µA quiescent current extends single-cell Li+ life beyond 5 years in standby. | Use Scenario: Programmable logic controllers deployed in factory automation must survive line sags and transient surges without rebooting. IC Role / Device Role / Timing Role: MAX6361PUT29+T provides precise +3.0V rail monitoring and generates a clean, 150ms-wide RESET# pulse synchronized to VCC recovery. Use Value: 100ns glitch immunity prevents nuisance resets during motor switching events; 2.93V threshold matches nominal +3.0V LDO output tolerance. |
| POS Terminals | Smart Energy Meters |
Use Scenario: Retail point-of-sale terminals use coin-cell backup to preserve transaction logs during brief AC outages. IC Role / Device Role / Timing Role: MAX6361PUT29+T detects VCC collapse below 2.93V, activates BATT→OUT path, and holds µP in reset until stable power returns. Use Value: Seamless switchover preserves RAM contents; MR pin allows service technician to force cold boot without opening enclosure. | Use Scenario: Electricity meters with tamper-detection logging require secure, long-term memory retention during grid instability. IC Role / Device Role / Timing Role: MAX6361PUT29+T supervises the +3.3V meter SoC supply and manages supercapacitor-assisted backup power delivery to RTC/SRAM. Use Value: Guaranteed 1.2V operation enables function during deep brownouts; 40mV switchover hysteresis avoids chatter during marginal VCC conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361HUT29+T | Same 2.93V threshold and MR functionality, but offered in lead-free 6-pin SOT23 with different top marking (AAGH vs AAGF); identical electrical specs. | No functional difference; selected when specific tape-and-reel packaging or traceability requirements apply. | Drop-in replacement if board layout accommodates same SOT23 footprint and thermal profile. |
| TPS3808G33DBVR | TI part with 3.08V threshold (vs 2.93V), 35µA supply current (vs 11µA), and no manual reset input; push-pull RESET output. | Lacks MR pin and battery switchover; suited for simpler reset-only applications without backup power management. | Choose only if 3.08V threshold aligns with system rail and manual reset is implemented elsewhere. |
Compared with MAX6361HUT29+T, the MAX6361PUT29+T offers identical supervision performance but differs in packaging specification and reel orientation; versus TPS3808G33DBVR, it delivers lower quiescent current, integrated battery switchover, and MR capability-critical for portable SRAM backup systems.
Availability
MAX6361PUT29+T is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC modules, POS terminals, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6361PUT29+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 demanding industrial, automotive, and computing applications.
The MAX6361–MAX6364 family was developed specifically for low-voltage microprocessor systems needing integrated reset generation, battery switchover, and manual reset-targeting portable, battery-backed, and high-reliability embedded control applications.
FAQ
What is the exact reset threshold voltage of the MAX6361PUT29+T?
The MAX6361PUT29+T has a factory-trimmed reset threshold of 2.93V, with guaranteed tolerance of ±1.5% over the full -40°C to +85°C operating temperature range. This value is confirmed in the Electrical Characteristics table of the official datasheet (Rev 4, October 2011), under the MAX636_UT29 suffix row. The threshold is fixed and not adjustable.
Does the MAX6361PUT29+T support battery backup functionality?
Yes, the MAX6361PUT29+T fully supports battery backup. When VCC falls below both the 2.93V reset threshold and VBATT by ≥20mV, the internal MOSFET connects BATT to OUT, powering downstream SRAM or RTC. Recovery occurs when VCC rises ≥20mV above VBATT. This behavior is documented in the Detailed Description and Table 1 of the MAX6361–MAX6364 datasheet.
What is the function of the MR pin on the MAX6361PUT29+T?
The MR (Manual Reset) pin on the MAX6361PUT29+T is an active-low input that forces a reset when pulled to GND. It features an internal 20kΩ pull-up to VCC, enabling direct connection of a momentary switch without external components. Reset remains asserted for ≥150ms after MR returns high, and the input is debounced with 100ns glitch immunity per the datasheet specifications.
Can the MAX6361PUT29+T operate from a 1.2V supply?
Yes, the MAX6361PUT29+T is fully specified to operate from a minimum supply voltage of +1.2V on either VCC or VBATT. Its RESET and RESET outputs remain valid down to 1.2V, and supply current is characterized at 2.8V, 3.6V, and 5.5V - confirming robust sub-1.8V functionality essential for single-cell battery systems.
What package type and RoHS status does the MAX6361PUT29+T use?
The MAX6361PUT29+T uses a 6-pin SOT23 package (package code U6-1, outline 21-0058) and is RoHS-compliant. The "+T" suffix explicitly denotes lead-free, halogen-free packaging per Maxim's ordering conventions, as stated in the Ordering Information section of the datasheet.
MAX6361PUT29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6361PUT29+T FAQ
1.How can I place an order for MAX6361PUT29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6361PUT29+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 MAX6361PUT29+T reliable?
The price and inventory of MAX6361PUT29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6361PUT29+T is usually 5 days.
3.What payment methods are accepted for MAX6361PUT29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6361PUT29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6361PUT29+T?
MAX6361PUT29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6361PUT29+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 MAX6361PUT29+T?
For technical support, including MAX6361PUT29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6361PUT29+T requirements.
6.How does Aetrix verify that MAX6361PUT29+T is sourced from the original manufacturer or authorized distributors?
All MAX6361PUT29+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 MAX6361PUT29+T meets industry standards.
7.What is the process for return or replacement of MAX6361PUT29+T?
All MAX6361PUT29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6361PUT29+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 MAX6361PUT29+T part is unused and in its original packaging.
Return procedure for MAX6361PUT29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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