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Analog Devices Inc./Maxim Integrated MAX6377UR31
- Part No.:
- MAX6377UR31
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6377UR31.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:3,922
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Product details
Overview
MAX6377UR31 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 battery and power-supply monitoring in portable systems. It features 500nA supply current, operates down to 1V VCC, and ignores fast transients - enabling reliable reset assertion in Li+-powered microcontroller supervision and low-voltage DC/DC converter sequencing.
For engineers reviewing the MAX6377UR31 datasheet, MAX6377UR31 pinout, MAX6377UR31 application, or MAX6377UR31 equivalent, key selection criteria include its 3.08V trip point, open-drain output compatibility with mixed-voltage logic domains, transient immunity up to 140µs at 20mV overdrive, and SOT23-3 footprint suitability for space-constrained PCB layouts.
Technical Context
The MAX6377UR31 implements a precision bandgap reference and comparator with internally trimmed resistors to deliver fixed 3.08V detection without external components. Its open-drain output sinks current when VCC falls below threshold and requires an external pull-up to interface with 1.8V–5.5V logic families.
It guarantees correct output state down to 1V VCC and exhibits ±2.5% threshold accuracy across –40°C to +85°C. Propagation delay is 6.3µs (typ) for falling edge, with hysteresis of 100mV to prevent chatter during slow VCC decay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2.5% (factory-trimmed; enables precise brown-out detection for 3.3V rail monitoring) |
| Supply Current | 500nA (typ) at +25°C - extends battery life in always-on monitoring applications) |
| Output Type | Active-low, open-drain - supports wired-OR reset buses and level-shifting via external pull-up |
| VCC Operating Range | 1.2V to 5.5V - ensures valid reset assertion even during deep brown-out or partial power loss |
| Propagation Delay | 6.3µs (typ, falling edge) - provides timely system reset without excessive latency |
| Threshold Hysteresis | 100mV - prevents oscillation during slow-rising or noisy supply recovery |
| Tempco | 40ppm/°C - maintains trip-point stability across industrial temperature range |
Pinout & Package
MAX6377UR31 is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 0.95mm height - compatible with standard pick-and-place and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator; must be low-impedance connection to system ground plane |
| 2 | OUT | Open-drain active-low output; sinks ≥100µA at 0.4V (VCC ≥1.2V); requires external pull-up resistor |
| 3 | VCC | Supply input; monitors this rail for undervoltage; accepts 1.2V–5.5V with no external decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables multi-year operation on coin-cell batteries in IoT endpoint sensors |
| No external components needed | Factory-trimmed threshold and integrated reference eliminate calibration resistors and reduce BOM count |
| Transient immunity | Rejects negative VCC glitches ≤140µs at 20mV overdrive - avoids false resets in noisy power environments |
| Wide VCC operating range | Functions reliably from 1.2V to 5.5V - supports reset assertion during deep brown-out and hot-swap scenarios |
| Open-drain output architecture | Enables shared reset bus with multiple supervisors and flexible pull-up to any logic voltage ≤5.5V |
Applications
| Battery-Powered Microcontroller Supervision | Li+ Battery Voltage Monitoring |
|---|---|
Use Scenario: Monitoring 3.3V regulated rail derived from single-cell Li+ battery in wearable health sensor. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset to MCU when battery drops below 3.08V, preventing data corruption during low-voltage operation. Use Value: 500nA supply current extends usable battery life by >20% versus µA-class alternatives; open-drain output interfaces directly to 1.8V MCU reset pin via 10kΩ pull-up to 1.8V rail. |
Use Scenario: Detecting end-of-discharge in portable medical thermometer powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Brown-out detector triggering shutdown sequence when cell voltage falls to 3.08V, preserving remaining capacity for critical memory write. Use Value: Guaranteed operation down to 1V VCC ensures reliable detection even as battery voltage sags under load; ±2.5% threshold accuracy eliminates need for post-production calibration. |
| DC/DC Converter Sequencing | Industrial Sensor Node Power Management |
Use Scenario: Enabling controlled startup of dual-rail (3.3V/1.8V) power system using discrete MOSFET load switches. IC Role / Device Role / Timing Role: Reset supervisor holding enable signal low until 3.3V rail stabilizes above 3.08V, then releasing 1.8V regulator after delay. Use Value: 100mV hysteresis prevents premature release during rail settling; propagation delay <7µs ensures tight timing control without added RC networks. |
Use Scenario: Low-power environmental sensor node operating intermittently on energy-harvested power with supercapacitor buffer. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) device disabling RF transmission when stored energy falls below 3.08V threshold. Use Value: SOT23-3 footprint minimizes board area; 40ppm/°C tempco ensures stable trip point across –40°C to +85°C field deployment range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB31DBZR | 3.08V threshold, open-drain, but 600nA supply current and only guaranteed down to 1.5V VCC | Lacks 1V operation guarantee; less suitable for deep brown-out detection in ultra-low-voltage systems | Choose if higher VCC minimum is acceptable and TI supply-chain preference applies |
| APX803S-31SA-7 | 3.08V threshold, open-drain, 800nA supply current, ±3% accuracy over temperature | Higher quiescent current and wider threshold tolerance reduce battery life and margin in precision applications | Consider for cost-sensitive designs where 500nA and ±2.5% are not mandatory |
Compared with TLV803EB31DBZR and APX803S-31SA-7, the MAX6377UR31 delivers superior ultra-low-power performance (500nA), guaranteed functionality down to 1V VCC, and tighter threshold accuracy (±2.5%) - making it optimal for long-life battery-powered systems requiring robust brown-out protection.
Availability
MAX6377UR31 is available at Aetrix Electronics and suitable for battery-powered microcontroller supervision, Li+ battery voltage monitoring, and DC/DC converter sequencing requiring stable component supply, consistent lead-free SOT23-3 packaging, and full traceability from Maxim Integrated.
Supply support for MAX6377UR31 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 management, sensing, and interface applications - with emphasis on high reliability and ultra-low power consumption.
The MAX6375–MAX6380 family was developed specifically for battery- and energy-constrained systems needing highly accurate, zero-component voltage monitoring - targeting portable medical devices, wearables, and industrial IoT endpoints.
FAQ
What is the exact reset threshold voltage of the MAX6377UR31?
The MAX6377UR31 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. At +25°C, the typical threshold is 3.08V, and the min/max limits are 3.003V and 3.150V respectively - confirmed in Table 1 of the official datasheet.
Does the MAX6377UR31 require an external pull-up resistor on its OUT pin?
Yes, the MAX6377UR31 features an open-drain active-low output and requires an external pull-up resistor to function correctly. The datasheet specifies that the pull-up may connect to any supply voltage up to 5.5V, and recommends selecting a value large enough to ensure a valid logic low (≤0.4V at 100µA sink) while small enough to drive connected inputs reliably.
Can the MAX6377UR31 operate when VCC drops below 1.2V?
Yes - the MAX6377UR31 is guaranteed to maintain correct output logic state down to VCC = 1V, per the Absolute Maximum Ratings and Electrical Characteristics tables. This allows reliable reset assertion during deep brown-out conditions where other detectors fail, making it especially valuable in ultra-low-voltage battery backup scenarios.
What is the maximum transient duration the MAX6377UR31 can ignore at 20mV overdrive?
At a threshold overdrive (VTH – VCC) of 20mV, the MAX6377UR31 can ignore negative-going VCC transients up to 140µs in duration, as shown in Figure MAX6375-04 of the datasheet. This transient immunity prevents false resets caused by short power glitches common in switching regulator environments.
Is the MAX6377UR31 available in both leaded and lead-free packaging?
Yes - the MAX6377UR31 is offered in both leaded and lead-free versions. To specify lead-free packaging, replace the "-T" suffix with "+T" in the order code (e.g., MAX6377UR31+T). Both variants use the same SOT23-3 package outline and are compatible with standard reflow profiles.
MAX6377UR31 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- SOT-23-3
MAX6377UR31 FAQ
1.How can I place an order for MAX6377UR31 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377UR31 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 MAX6377UR31 reliable?
The price and inventory of MAX6377UR31 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377UR31 is usually 5 days.
3.What payment methods are accepted for MAX6377UR31?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377UR31 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377UR31?
MAX6377UR31 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377UR31 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 MAX6377UR31?
For technical support, including MAX6377UR31 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377UR31 requirements.
6.How does Aetrix verify that MAX6377UR31 is sourced from the original manufacturer or authorized distributors?
All MAX6377UR31 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 MAX6377UR31 meets industry standards.
7.What is the process for return or replacement of MAX6377UR31?
All MAX6377UR31 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377UR31, 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 MAX6377UR31 part is unused and in its original packaging.
Return procedure for MAX6377UR31:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6377UR31 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
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