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Analog Devices Inc./Maxim Integrated MAX6377XR31+T
- Part No.:
- MAX6377XR31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6377XR31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,523
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Product details
Overview
MAX6377XR31+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed threshold of 3.08V ±2.5%, designed for precision supply monitoring in battery-powered systems. It features 500nA supply current, operates down to 1V VCC, and rejects fast transients - enabling reliable reset generation in portable medical devices and low-power IoT sensors.
For engineers reviewing the MAX6377XR31+T datasheet, MAX6377XR31+T pinout, MAX6377XR31+T application, or MAX6377XR31+T equivalent, key selection criteria include its 3.08V trip point, SC70-3 open-drain output, -40°C to +85°C operation, and immunity to sub-200µs VCC glitches at typical overdrive conditions.
Technical Context
The MAX6377XR31+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.08V threshold. Its open-drain output requires an external pull-up and asserts logic low when VCC falls below VTH, remaining valid down to 1V supply.
It delivers 20µs propagation delay (falling edge) with ±2.5% threshold accuracy over temperature and exhibits transient immunity up to 200µs for 100mV VTH–VCC overdrive - critical for stable reset signaling in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2.5% at +25°C; ensures accurate brown-out detection for 3.3V rail monitoring |
| Supply Current | 500nA typical; enables multi-year battery life in always-on wearable sensors |
| Operating Voltage Range | 1.2V to 5.5V; supports operation during deep brown-out and across diverse supply rails |
| Output Type | Active-low open-drain; allows flexible pull-up to any logic voltage ≤5.5V for mixed-voltage system interfacing |
| Propagation Delay | 20µs (falling), 6.3µs (rising); provides deterministic timing for microcontroller reset assertion |
| Temperature Range | -40°C to +85°C; qualified for industrial and automotive cabin-temperature applications |
| Hysteresis | 100mV nominal; prevents chatter during slow VCC recovery near threshold |
Pinout & Package
MAX6377XR31+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. The package is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator; must be low-impedance for threshold stability |
| 2 | OUT | Active-low open-drain output; sinks current when asserted; requires external pull-up resistor |
| 3 | VCC | Supply input; powers internal circuitry and defines monitored rail; valid from 1.2V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA enables >10-year coin-cell operation in maintenance-free sensor nodes |
| Precision threshold | 3.08V ±2.5% over -40°C to +85°C eliminates need for external calibration or trimming |
| Transient immunity | Rejects VCC glitches <200µs duration at 100mV overdrive - avoids false resets in switching regulator noise |
| No external components | Internally trimmed resistors and bandgap eliminate BOM cost and layout area for discrete reset ICs |
| Open-drain flexibility | Supports wired-OR reset buses and level-shifting to 1.8V/2.5V/3.3V/5V logic domains |
Applications
| Battery-Powered Wearables | Industrial Sensor Nodes |
|---|---|
Use Scenario: Continuous heart-rate monitoring using CR2032 coin cell with DC/DC step-up to 3.3V. IC Role / Device Role / Timing Role: Voltage detector asserting MCU reset when battery drops below 3.08V to prevent data corruption. Use Value: 500nA quiescent current extends usable battery life by >30% versus µA-class alternatives. |
Use Scenario: Wireless temperature sensor deployed in factory-floor enclosures with 24V-to-3.3V conversion. IC Role / Device Role / Timing Role: Monitors regulated 3.3V rail; triggers watchdog timeout if supply sags due to load transients. Use Value: 20µs propagation delay and 100mV hysteresis ensure clean, chatter-free reset under EMI-rich conditions. |
| Medical Diagnostic Handhelds | Smart Meter Battery Backup |
Use Scenario: Portable ECG device powered by Li-ion with dual-rail (1.8V/3.3V) regulation. IC Role / Device Role / Timing Role: Resets application processor when main 3.3V rail falls below safe operating margin. Use Value: Open-drain output pulled to 1.8V domain enables direct interface with low-voltage MCU I/O without level shifters. |
Use Scenario: AMI smart meter retaining real-time clock and memory during AC mains failure using supercapacitor backup. IC Role / Device Role / Timing Role: Detects 3.08V threshold on backup rail to initiate graceful shutdown and SRAM save. Use Value: Guaranteed correct output state down to 1V VCC ensures reset assertion even during final capacitor discharge phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB30DBVR | 3.0V threshold, 350nA ICC, SOT23-3, push-pull active-low output | Lacks open-drain flexibility; requires matching pull-up domain; no transient immunity spec provided | Select when push-pull drive into fixed-voltage logic is preferred and board space permits SOT23 |
| APX803S-30SA-7 | 3.0V threshold, 600nA ICC, SOT23-3, open-drain active-low; ±2% accuracy | Slightly tighter accuracy but higher ICC; only rated to +70°C ambient | Choose for cost-sensitive consumer applications where extended temperature range is not required |
Compared with TLV803EB30DBVR and APX803S-30SA-7, the MAX6377XR31+T uniquely combines 3.08V precision, -40°C to +85°C qualification, SC70 footprint, and documented transient immunity - making it optimal for high-reliability portable industrial designs.
Availability
MAX6377XR31+T is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, medical diagnostic handhelds, and smart meter battery backup systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6377XR31+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, medical, and communications applications.
The MAX6375–MAX6380 family was developed specifically for ultra-low-power supply monitoring in portable and energy-harvesting systems, emphasizing nanoscale ICC, factory-trimmed thresholds, and robust glitch rejection.
FAQ
What is the exact reset threshold voltage of the MAX6377XR31+T?
The MAX6377XR31+T has a factory-trimmed nominal reset threshold of 3.08V, with guaranteed accuracy of ±2.5% over the full -40°C to +85°C temperature range. This value is confirmed in Table 1 of the official datasheet and corresponds to the "R31" suffix in the part number.
Does the MAX6377XR31+T require an external pull-up resistor on its OUT pin?
Yes, the MAX6377XR31+T features an open-drain output and requires an external pull-up resistor connected between OUT and the target logic supply (up to 5.5V). The resistor value must be selected to ensure VOL ≤0.4V at ISINK = 100µA while maintaining adequate rise time for the driven load.
Can the MAX6377XR31+T operate reliably below 1.2V VCC?
No - the MAX6377XR31+T is specified to operate from 1.2V to 5.5V. While its output remains valid down to 1V VCC (ensuring reset assertion during final battery discharge), functional operation including threshold comparison and internal biasing is only guaranteed above 1.2V per Absolute Maximum Ratings and Electrical Characteristics tables.
What is the propagation delay of the MAX6377XR31+T during power-down events?
The MAX6377XR31+T exhibits a typical falling-edge propagation delay of 20µs when VCC crosses the 3.08V threshold downward. This delay is measured under standard conditions (VCC = VTH – 100mV to VTH + 100mV) and remains stable across temperature per Typical Operating Characteristics graphs.
Is the MAX6377XR31+T available in both leaded and lead-free packaging?
Yes - the "+T" suffix in MAX6377XR31+T explicitly denotes lead-free, RoHS-compliant packaging. The standard "-T" variant is leaded. Both versions use the same SC70-3 footprint and share identical electrical specifications and thermal characteristics.
MAX6377XR31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6377XR31+T FAQ
1.How can I place an order for MAX6377XR31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377XR31+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 MAX6377XR31+T reliable?
The price and inventory of MAX6377XR31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377XR31+T is usually 5 days.
3.What payment methods are accepted for MAX6377XR31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377XR31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377XR31+T?
MAX6377XR31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377XR31+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 MAX6377XR31+T?
For technical support, including MAX6377XR31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377XR31+T requirements.
6.How does Aetrix verify that MAX6377XR31+T is sourced from the original manufacturer or authorized distributors?
All MAX6377XR31+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 MAX6377XR31+T meets industry standards.
7.What is the process for return or replacement of MAX6377XR31+T?
All MAX6377XR31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377XR31+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 MAX6377XR31+T part is unused and in its original packaging.
Return procedure for MAX6377XR31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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