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Analog Devices Inc./Maxim Integrated MAX6344RUT-T
- Part No.:
- MAX6344RUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6344RUT-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6344RUT-T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit in a 6-pin SOT23 package, monitoring VCC with a factory-trimmed reset threshold of 2.63V, guaranteeing valid RESET output down to VCC = +1V, and providing a dedicated power-fail comparator (PFI/PFO) for low-battery or auxiliary supply monitoring in portable systems.
For engineers reviewing the MAX6344RUT-T datasheet, MAX6344RUT-T pinout, MAX6344RUT-T application, or MAX6344RUT-T equivalent, this device is selected for precision reset assertion timing, dual-voltage monitoring capability, and guaranteed operation across -40°C to +125°C industrial temperature range without external components.
Technical Context
The MAX6344RUT-T implements a precision bandgap-based reset comparator with ±25mV threshold tolerance over temperature, paired with a separate 1.25V reference for the PFI input. Its internal reset generator ensures a minimum 100ms timeout period after VCC rises above 2.63V or MR transitions high.
Unlike MAX6342/MAX6343, the MAX6344RUT-T uses an active-high push-pull RESET output - eliminating need for external pull-up resistors - while retaining debounced CMOS-compatible MR input and independent PFO output that asserts low when PFI falls below 1.25V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±25mV - factory-trimmed for reliable brownout detection at nominal VCC levels |
| Supply Range | +1.0V to +5.5V - supports single-supply operation down to ultra-low voltage logic domains |
| RESET Pulse Width | 100ms min - ensures µP initialization completes before release, even during slow-rising VCC |
| PFI Threshold | +1.25V - enables accurate power-fail warning or secondary supply monitoring via resistor divider |
| Operating Temp | -40°C to +125°C - qualified for automotive under-hood and industrial embedded environments |
| Supply Current | 1.2µA typical at +25°C - enables multi-year battery life in always-on monitoring applications |
| RESET Output Type | Active-high push-pull - drives high without external components; sinks current only during assertion |
Pinout & Package
Package: 6-pin SOT23-6, 1.6mm × 2.9mm footprint, surface-mount, lead-free compatible (suffix +T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Main supply input | Power source for internal comparators and RESET driver; operates from +1.0V to +5.5V |
| 2 - GND | Ground reference | Common return path for all internal circuits and external PFI/PFO connections |
| 3 - PFI | Power-fail monitor input | Compares external voltage against internal 1.25V reference; asserts PFO low when input <1.25V |
| 4 - PFO | Power-fail output | Open-drain output signaling power degradation; requires external pull-up for interrupt generation |
| 5 - MR | Manual reset input | CMOS-compatible active-low trigger; debounced internally; forces RESET high for ≥100ms |
| 6 - RESET | Active-high reset output | Push-pull output asserting high for ≥100ms after VCC >2.63V or MR release |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±25mV tolerance over -40°C to +125°C - eliminates calibration overhead in production |
| Guaranteed RESET validity to VCC = +1V | Ensures deterministic reset state during deep brownout or battery depletion scenarios |
| Dedicated 1.25V PFI comparator | Enables independent monitoring of secondary supplies or battery voltage without µP intervention |
| 100ms minimum reset timeout | Meets JEDEC JESD74A requirements for reliable processor initialization timing |
| Debounced MR input | 1µs internal glitch rejection - allows direct connection to mechanical pushbuttons without RC filters |
Applications
| Portable Battery Monitoring | Industrial Microcontroller Supervision |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage in handheld medical devices to initiate graceful shutdown before cutoff. IC Role / Device Role / Timing Role: MAX6344RUT-T acts as primary supervisor, using PFI to detect battery sag below 3.0V via resistor divider while asserting active-high RESET to halt MCU execution. Use Value: Prevents data corruption by ensuring MCU enters safe state before battery drops below 2.7V, leveraging 1.25V reference accuracy and 100ms hold time. | Use Scenario: Ensuring deterministic startup and brownout recovery in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: MAX6344RUT-T provides VCC supervision at 2.63V threshold and generates clean active-high RESET signal synchronized to 24V-to-3.3V DC/DC output rise time. Use Value: Guarantees µP reset remains asserted until regulated 3.3V rail stabilizes, eliminating boot failures caused by marginal input transients. |
| Telecom Line Card Power Sequencing | Automotive Infotainment Power Management |
Use Scenario: Coordinating power-up sequence between FPGA, DSP, and memory on high-density telecom line cards with multiple rail dependencies. IC Role / Device Role / Timing Role: MAX6344RUT-T monitors main 3.3V rail and triggers RESET only after stable voltage is confirmed; PFO feeds back to sequencer controller for auxiliary rail enable timing. Use Value: Enables precise inter-rail timing control without adding discrete logic, reducing BOM count and layout complexity. | Use Scenario: Supervising 5V and 3.3V rails in automotive infotainment head units exposed to cold-crank and load-dump conditions. IC Role / Device Role / Timing Role: MAX6344RUT-T asserts RESET during cold-crank dips below 2.63V and uses PFI to monitor backup battery voltage for real-time clock retention. Use Value: Maintains system integrity across wide temperature (-40°C to +125°C) and harsh electrical environments per AEC-Q100 stress profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342RUT-T | Active-low push-pull RESET output; includes MR input; same 2.63V threshold and PFI/PFO functionality | Requires inverted logic interface; suitable where host µP accepts active-low reset | Select when existing design uses active-low reset signaling and no level-shifting is desired |
| TPS3808G33DBVR | 2.93V fixed threshold; 350ms reset timeout; 1.8µA quiescent current; SOT23-6 package | Lacks dedicated PFI/PFO comparator; no independent power-fail warning capability | Choose when only basic VCC supervision is needed and longer reset pulse is acceptable |
Compared with MAX6342RUT-T, the MAX6344RUT-T simplifies interface design by eliminating need for external inverters; compared with TPS3808G33DBVR, it adds critical dual-monitoring capability via PFI/PFO but trades slightly higher quiescent current for broader functional integration.
Availability
MAX6344RUT-T is available at Aetrix Electronics and suitable for portable computing, telecom infrastructure, and industrial embedded systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6344RUT-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 and mixed-signal ICs for power, sensing, connectivity, and security applications in industrial, automotive, and communications markets.
The MAX6342–MAX6345 family delivers integrated microprocessor supervision with dual-threshold monitoring, targeting space-constrained, battery-sensitive, and high-reliability embedded systems where discrete solutions increase cost and failure risk.
FAQ
What is the exact reset threshold voltage of the MAX6344RUT-T?
The MAX6344RUT-T has a factory-trimmed reset threshold of 2.63V with a tolerance of ±25mV over the full -40°C to +125°C operating temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table of the MAX6342–MAX6345 datasheet. The 'R' in the part number explicitly denotes the 2.63V variant, and the threshold is guaranteed without external calibration.
Does the MAX6344RUT-T provide both reset and power-fail monitoring functions?
Yes, the MAX6344RUT-T integrates two independent monitoring functions: a primary VCC reset supervisor with 2.63V threshold and an auxiliary power-fail comparator with a fixed +1.25V reference on the PFI pin. When the voltage at PFI falls below 1.25V, the open-drain PFO output pulls low - enabling early-warning detection of battery depletion or secondary supply failure without µP involvement.
What is the function of Pin 6 (RESET) on the MAX6344RUT-T?
Pin 6 of the MAX6344RUT-T is the active-high push-pull RESET output. It drives high for a minimum of 100ms after VCC rises above 2.63V or after the MR input transitions from low to high. Unlike open-drain alternatives, this output does not require an external pull-up resistor, simplifying PCB layout and ensuring fast, robust reset assertion directly compatible with most µP reset inputs.
Can the MAX6344RUT-T operate reliably at very low supply voltages?
Yes, the MAX6344RUT-T is guaranteed to assert a valid logic-level RESET output down to VCC = +1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This feature ensures deterministic behavior during deep brownout conditions - critical for preserving state in battery-powered devices where VCC may decay slowly below nominal operating voltage before complete shutdown.
How does the manual reset (MR) input behave on the MAX6344RUT-T?
The MR input on the MAX6344RUT-T is a CMOS-compatible, active-low signal that forces the RESET output high for ≥100ms when pulled low. It features internal 1µs glitch rejection and requires no external debounce circuitry. When unused, MR must be tied to VCC; floating is not permitted. The MR function operates independently of VCC level as long as VCC ≥ +1.0V, supporting hardware-initiated resets during normal operation.
MAX6344RUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6344RUT-T FAQ
1.How can I place an order for MAX6344RUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6344RUT-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 MAX6344RUT-T reliable?
The price and inventory of MAX6344RUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6344RUT-T is usually 5 days.
3.What payment methods are accepted for MAX6344RUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6344RUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6344RUT-T?
MAX6344RUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6344RUT-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 MAX6344RUT-T?
For technical support, including MAX6344RUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6344RUT-T requirements.
6.How does Aetrix verify that MAX6344RUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6344RUT-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 MAX6344RUT-T meets industry standards.
7.What is the process for return or replacement of MAX6344RUT-T?
All MAX6344RUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6344RUT-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 MAX6344RUT-T part is unused and in its original packaging.
Return procedure for MAX6344RUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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