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Analog Devices Inc./Maxim Integrated MAX6344RUT
- Part No.:
- MAX6344RUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6344RUT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,655
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Product details
Overview
MAX6344RUT from Maxim Integrated is an active-high push-pull µP supervisory circuit in SOT23-6 packaging, monitoring VCC with factory-trimmed 2.63V reset threshold, guaranteeing valid RESET output down to VCC = +1V, and featuring a dedicated +1.25V power-fail comparator (PFI/PFO) for low-battery or auxiliary supply monitoring in portable systems.
For engineers reviewing the MAX6344RUT datasheet, MAX6344RUT pinout, MAX6344RUT application, or MAX6344RUT equivalent, this device is selected for precise reset timing in multivoltage embedded control, telecom power sequencing, and battery-backed instrumentation where guaranteed active-high reset assertion and independent power-fail warning are required.
Technical Context
The MAX6344RUT implements a precision bandgap-based reset comparator with ±25mV threshold tolerance over –40°C to +125°C, paired with a separate +1.25V reference for the PFI input. Its internal reset generator ensures a minimum 100ms timeout after VCC exceeds 2.63V or MR deasserts.
Unlike MAX6342/MAX6343 variants, MAX6344RUT provides only an active-high push-pull RESET output - no MR input or open-drain option - simplifying interface to microprocessors with active-high reset pins while retaining full power-fail detection via PFO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.63V ±25mV (factory-trimmed; ensures reliable reset release at defined supply level) |
| RESET Output Type | Active-high push-pull (drives high during normal operation; asserts low for ≥100ms on fault) |
| PFI Threshold | +1.25V (enables external voltage monitoring via resistor divider for power-fail or low-battery warning) |
| Supply Range | +1.0V to +5.5V (supports operation during brownout; RESET valid down to VCC = +1V) |
| Reset Timeout | 100ms min (guaranteed minimum pulse width prevents premature µP release during supply ramp-up) |
| Operating Temp | –40°C to +125°C (qualified for automotive under-hood and industrial embedded environments) |
| Package | SOT23-6 (2.9mm × 1.6mm footprint; compatible with standard reflow and automated assembly) |
Pinout & Package
MAX6344RUT is housed in a 6-pin SOT23-6 package with gull-wing leads, JEDEC MO-178AC compliant, 0.95mm max height, and lead-free (RoHS-compliant) construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input; powers internal comparators and reset generator; operates from +1.0V to +5.5V |
| 2 | GND | Analog/digital ground reference; must be connected directly to system ground plane |
| 3 | PFI | Power-fail input; referenced to internal +1.25V; goes low on PFO when PFI < 1.25V |
| 4 | PFO | Power-fail output; open-drain; active-low signal indicating monitored supply drop below threshold |
| 5 | MR | Not connected (NC); MAX6344RUT omits manual-reset functionality per datasheet selector guide |
| 6 | RESET | Active-high push-pull output; drives high normally; pulls low for ≥100ms during reset condition |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±25mV tolerance across –40°C to +125°C - eliminates external resistor calibration |
| Guaranteed RESET validity to VCC = +1V | Ensures deterministic reset state even during deep brownout - critical for fail-safe shutdown sequences |
| Dedicated +1.25V PFI reference | Enables accurate monitoring of secondary supplies (e.g., battery, analog rail) without external reference IC |
| 100ms minimum reset timeout | Prevents µP execution before stable clock and memory initialization - meets JEDEC JESD84-B51 requirements |
| SOT23-6 footprint | Minimizes PCB area and thermal mass; supports high-density portable designs with tight space constraints |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
Use Scenario: Li-ion powered handheld test instrument operating from 3.0V–4.2V battery range with backup SRAM retention. IC Role / Device Role / Timing Role: Supervises main 3.3V LDO output and triggers orderly save-to-EEPROM before shutdown when battery drops below 3.0V. Use Value: PFI monitors battery voltage via divider; PFO interrupts µP; RESET holds µP in reset until safe shutdown completes. | Use Scenario: Line card in carrier-grade Ethernet switch requiring dual-rail supervision (5V logic, 3.3V I/O). IC Role / Device Role / Timing Role: Monitors 3.3V rail with 2.63V threshold; provides active-high RESET to FPGA configuration controller. Use Value: Ensures FPGA remains held in reset until 3.3V stabilizes post-power-up, preventing configuration corruption. |
| Multivoltage Systems | Embedded Control Systems |
Use Scenario: Industrial PLC module with isolated 24V input, 5V intermediate, and 3.3V core rails. IC Role / Device Role / Timing Role: Supervises 3.3V core rail; PFI tied to 5V rail via divider to warn of upstream regulator failure. Use Value: PFO alerts system controller of 5V degradation before 3.3V collapses - enables predictive maintenance logging. | Use Scenario: Automotive body control module (BCM) with CAN interface and EEPROM logging. IC Role / Device Role / Timing Role: Provides active-high RESET to ARM Cortex-M4; PFI monitors 12V battery via resistive divider. Use Value: Detects battery sag below 11.5V (via PFI) and asserts RESET if 3.3V falls below 2.63V - satisfies ISO 16750-2 cold-crank immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342RUT | Active-low push-pull RESET; includes MR input; same 2.63V threshold and PFI/PFO | Requires µP with active-low reset pin; supports manual reset via external switch | Select when system design uses active-low reset signaling or requires field-serviceable reset initiation |
| TLV809RDBZR | 2.63V threshold, active-high push-pull RESET, no PFI/PFO; SOT23-3 package | Lacks power-fail monitoring capability; smaller footprint but no auxiliary voltage supervision | Select when only primary VCC supervision is needed and board space is constrained beyond SOT23-6 limits |
Compared with MAX6342RUT, MAX6344RUT removes MR and delivers active-high RESET - simplifying µP interface but eliminating manual override. Versus TLV809RDBZR, MAX6344RUT adds PFI/PFO for dual-supply monitoring at the cost of one extra pin and larger package - essential for battery-aware or fault-diagnostic systems.
Availability
MAX6344RUT is available at Aetrix Electronics and suitable for portable/battery-powered equipment, telecom equipment, and multivoltage systems requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned temperature performance.
Supply support for MAX6344RUT 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 communications applications.
The MAX6342–MAX6345 family was engineered specifically for high-reliability µP supervision in space-constrained, wide-temperature embedded systems - emphasizing factory-trimmed accuracy, ultra-low supply current, and integrated power-fail warning without external components.
FAQ
What is the exact reset threshold voltage of the MAX6344RUT?
The MAX6344RUT has a factory-trimmed VCC reset threshold of 2.63V, with a tolerance of ±25mV over the full operating temperature range of –40°C to +125°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table of the MAX6342–MAX6345 datasheet. The "R" suffix in MAX6344RUT explicitly denotes the 2.63V variant, confirmed by Maxim's SOT top-mark table (AADU).
Does the MAX6344RUT include a manual-reset (MR) input?
No, the MAX6344RUT does not include a manual-reset input. Per the MAX6342–MAX6345 Selector Guide and Pin Description tables, only MAX6342, MAX6343, and MAX6345 feature MR functionality. The MAX6344RUT pinout assigns Pin 5 as NC (no connection), and its functional diagram confirms omission of MR - it provides only VCC, GND, PFI, PFO, and active-high RESET.
What is the function of the PFO pin on the MAX6344RUT?
The PFO (Power-Fail Output) pin on the MAX6344RUT is an open-drain, active-low output that asserts low when the voltage on the PFI pin falls below the internal +1.25V reference. It is used to signal impending power loss, low battery, or auxiliary supply failure. Since PFO is open-drain, it requires an external pull-up resistor to a logic-compatible voltage (e.g., 3.3V or 5V) and can interface directly with µP interrupt inputs or other monitoring circuitry.
Can the MAX6344RUT operate with a supply voltage below 2.63V?
Yes, the MAX6344RUT operates with supply voltages from +1.0V to +5.5V and guarantees valid RESET output behavior down to VCC = +1V. While the reset threshold is 2.63V, the device remains functional at lower VCC levels - asserting RESET low when VCC drops below 2.63V and maintaining correct logic states until VCC reaches +1V. Below +1V, operation is not specified.
Is the MAX6344RUT pin-compatible with other devices in the MAX6342–MAX6345 family?
The MAX6344RUT shares the same SOT23-6 package and pinout numbering as MAX6342RUT and MAX6343RUT, but functional pin assignments differ: Pin 5 is NC on MAX6344RUT (vs. MR on MAX6342/MAX6343), and Pin 6 is active-high RESET (vs. active-low on MAX6342/MAX6345 or open-drain on MAX6343). Therefore, it is not pin-compatible for direct replacement without schematic and firmware review.
MAX6344RUT 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 FAQ
1.How can I place an order for MAX6344RUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6344RUT 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 reliable?
The price and inventory of MAX6344RUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6344RUT is usually 5 days.
3.What payment methods are accepted for MAX6344RUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6344RUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6344RUT?
MAX6344RUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6344RUT 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?
For technical support, including MAX6344RUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6344RUT requirements.
6.How does Aetrix verify that MAX6344RUT is sourced from the original manufacturer or authorized distributors?
All MAX6344RUT 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 meets industry standards.
7.What is the process for return or replacement of MAX6344RUT?
All MAX6344RUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6344RUT, 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 part is unused and in its original packaging.
Return procedure for MAX6344RUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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