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Analog Devices Inc./Maxim Integrated MAX6376UR31
- Part No.:
- MAX6376UR31
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6376UR31.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:3,213
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Product details
Overview
MAX6376UR31 from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 3.08V threshold (±2.5% over temperature), 500nA supply current, and guaranteed operation down to 1V VCC. It asserts a logic-high output when VCC falls below the threshold and is used in portable equipment power sequencing and microcontroller reset supervision.
For engineers reviewing the MAX6376UR31 datasheet, MAX6376UR31 pinout, MAX6376UR31 application, or MAX6376UR31 equivalent, this device serves as a low-quiescent-current, single-supply voltage monitor with precise trip point, transient immunity, and SOT23-3 compatibility - critical for space-constrained, long-life battery applications.
Technical Context
The MAX6376UR31 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver a fixed 3.08V detection threshold without external components. Its internal architecture ensures stable operation across -40°C to +85°C with ±2.5% accuracy and 40ppm/°C tempco.
It employs push-pull output logic (active-high) and ignores fast VCC transients up to 100µs at 30mV overdrive. Propagation delay is 6.3µs (falling) and 9.5µs (rising), with output valid down to 1V supply - enabling reliable reset assertion during brownout conditions in low-voltage embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal, ±2.5% over -40°C to +85°C - ensures accurate brownout detection for 3.3V rail monitoring. |
| Supply Current | 500nA typical - extends battery life in always-on monitoring applications such as wearables and IoT sensors. |
| Output Type | Active-high push-pull - drives logic-high directly without pull-up resistor, simplifying interface to MCU reset inputs. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with wide-input DC/DC converters. |
| Propagation Delay | 6.3µs (falling), 9.5µs (rising) - enables fast response to supply faults while avoiding false triggers from noise. |
| Threshold Hysteresis | 100mV - prevents output oscillation near trip point during slow-ramping or noisy supply conditions. |
| Tempco | 40ppm/°C - maintains threshold stability across industrial temperature range without calibration. |
Pinout & Package
MAX6376UR31 is housed in a 3-pin SOT23-3 package (lead-free, tape-and-reel). The compact 2.92mm × 1.3mm footprint supports high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry and output stage; must be connected to system ground plane for stable threshold accuracy. |
| 2 (OUT) | Active-high push-pull output | Drives logic-high when VCC < 3.08V; sinks 1.2mA / sources 500µA - directly interfaces to standard CMOS reset inputs without external components. |
| 3 (VCC) | Supply input | Monitored voltage rail; powers internal reference and comparator; operates from 1.2V–5.5V with full functionality down to 1V. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Laser-trimmed internal resistor network eliminates calibration parts and layout area - reduces BOM count and assembly cost. |
| Ultra-low 500nA quiescent current | Enables multi-year battery life in coin-cell-powered devices like medical patches and remote sensors. |
| 1V minimum operating voltage | Ensures valid reset assertion even during severe brownout - critical for fail-safe shutdown in energy-harvesting systems. |
| Transient immunity | Rejects VCC glitches ≤100µs at 30mV overdrive - prevents spurious resets in electrically noisy environments (e.g., motor-driven peripherals). |
| ±2.5% threshold accuracy over temperature | Guarantees consistent trip point across industrial ambient range without software compensation or margining. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring >5-year shelf life and reliable low-battery warning. IC Role / Device Role / Timing Role: Voltage detector supervising 3.3V regulated rail; asserts active-high reset to microcontroller when battery drops below 3.08V. Use Value: 500nA supply current extends operational lifetime; ±2.5% threshold tolerance ensures consistent low-battery flag across temperature drift. |
Use Scenario: DIN-rail mounted analog input module operating in factory environments with fluctuating 24V DC bus. IC Role / Device Role / Timing Role: Monitors local 3.3V LDO output; triggers system reset if upstream regulator fails or load dump occurs. Use Value: 100mV hysteresis prevents chatter during marginal supply recovery; 1V min VCC operation maintains supervision during brownout recovery. |
| Wireless Sensor Nodes | Smart Energy Meters |
|
Use Scenario: LoRaWAN node powered by Li-SOCl₂ primary cell, transmitting sensor data every 15 minutes. IC Role / Device Role / Timing Role: Active-high reset supervisor for ARM Cortex-M0+ MCU; holds processor in reset until stable 3.3V rail is established post-power-up. Use Value: Push-pull output eliminates need for external pull-up, reducing component count and leakage paths in ultra-low-power sleep states. |
Use Scenario: Revenue-grade meter with backup supercapacitor, requiring deterministic power-fail interrupt generation before main supply collapse. IC Role / Device Role / Timing Role: Detects 3.3V system rail sag to initiate secure data save and RTC holdover mode. Use Value: 6.3µs propagation delay enables timely firmware response; 40ppm/°C tempco ensures accuracy across -25°C to +70°C meter enclosure temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB31DBZR | 3.08V threshold, 350nA ICC, open-drain output, SOT23-3 | Requires external pull-up; lower ICC but incompatible active-high interface | Select when lowest possible current dominates and MCU accepts open-drain reset input. |
| APX803S-31SA-7 | 3.08V threshold, 1.1µA ICC, push-pull active-high, SOT23-3 | Higher supply current; wider tempco (±50ppm/°C); same pinout | Choose when higher ICC is acceptable and broader temperature qualification is needed beyond -40°C to +85°C. |
Compared with TLV803EB31DBZR and APX803S-31SA-7, the MAX6376UR31 uniquely balances ultra-low 500nA current, guaranteed 1V operation, and active-high push-pull output in a standard SOT23-3 - making it optimal for battery longevity and direct MCU reset integration without redesign.
Availability
MAX6376UR31 is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, industrial PLC I/O modules, and smart energy meters requiring stable component supply and long-term manufacturability.
Supply support for MAX6376UR31 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, and connectivity applications, with emphasis on reliability and integration.
The MAX6375–MAX6380 family delivers ultra-low-power voltage supervision for battery-critical systems, targeting applications where minimal current draw, small footprint, and factory-trimmed accuracy are essential.
FAQ
What is the exact reset threshold voltage of MAX6376UR31 and how tightly is it specified?
The MAX6376UR31 has a nominal reset threshold of 3.08V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). At +25°C, the typical threshold is 3.08V, and the min/max limits are 3.003V and 3.150V respectively. This precision is achieved via factory laser trimming and requires no external calibration.
Does MAX6376UR31 support operation below 1.8V, and what is its minimum functional VCC?
Yes, MAX6376UR31 is fully functional down to 1.2V and guaranteed to maintain correct output logic state (active-high when VCC < 3.08V) down to 1.0V. This capability enables reliable brownout detection in systems using low-voltage regulators or during deep discharge of lithium-based batteries.
What output drive strength does MAX6376UR31 provide, and can it directly drive a microcontroller reset pin?
MAX6376UR31 provides push-pull active-high output with 500µA source current and 1.2mA sink capability at VCC ≥ 3.2V. It meets standard CMOS input thresholds and directly drives most MCU reset pins without external components - eliminating the need for pull-up resistors or level shifters.
How does MAX6376UR31 handle power supply transients, and what is its immunity specification?
MAX6376UR31 rejects fast negative-going VCC transients up to 100µs duration when the overdrive (VTH – VCC) is 30mV. Immunity scales inversely with overdrive amplitude - e.g., at 100mV overdrive, maximum tolerable glitch width drops to ~20µs. This prevents false resets caused by switching noise or load dumps.
Is MAX6376UR31 available in both leaded and lead-free packaging, and what is the ordering suffix convention?
Yes, MAX6376UR31 is available in both leaded and lead-free versions. The standard orderable part uses the "-T" suffix (e.g., MAX6376UR31-T) for leaded packaging. To specify lead-free, replace "-T" with "+T", resulting in MAX6376UR31+T - a RoHS-compliant variant with matte tin finish.
MAX6376UR31 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:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6376UR31 FAQ
1.How can I place an order for MAX6376UR31 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6376UR31 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 MAX6376UR31 reliable?
The price and inventory of MAX6376UR31 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6376UR31 is usually 5 days.
3.What payment methods are accepted for MAX6376UR31?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6376UR31 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6376UR31?
MAX6376UR31 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6376UR31 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 MAX6376UR31?
For technical support, including MAX6376UR31 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6376UR31 requirements.
6.How does Aetrix verify that MAX6376UR31 is sourced from the original manufacturer or authorized distributors?
All MAX6376UR31 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 MAX6376UR31 meets industry standards.
7.What is the process for return or replacement of MAX6376UR31?
All MAX6376UR31 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6376UR31, 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 MAX6376UR31 part is unused and in its original packaging.
Return procedure for MAX6376UR31:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6376UR31 Tags
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