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Analog Devices Inc./Maxim Integrated MAX6376UR29+T
- Part No.:
- MAX6376UR29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6376UR29+T.pdf
- Description:
- IC VOLT DETECT LP 2.93V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,408
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Product details
Overview
MAX6376UR29+T 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 2.93V 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 threshold and is used in portable equipment power sequencing and Li+-battery undervoltage protection.
For engineers reviewing the MAX6376UR29+T datasheet, MAX6376UR29+T pinout, MAX6376UR29+T application, or MAX6376UR29+T equivalent, key selection criteria include reset threshold accuracy, ultra-low quiescent current, active-high push-pull output drive capability, transient immunity, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6376UR29+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.93V detection without external components. Its internal hysteresis of 100mV prevents chatter during slow VCC decay.
It operates across -40°C to +85°C with ±2.5% threshold accuracy and exhibits immunity to fast negative-going transients - rejecting glitches up to 200µs wide at 100mV overdrive. Propagation delay is 6.3µs (typ) for falling VCC transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (±2.5% over -40°C to +85°C); enables precise Li+ battery end-of-discharge detection at ~2.9V. |
| Supply Current | 500nA (typ) at +25°C; extends shelf life and runtime in coin-cell–powered devices like IoT sensors. |
| Output Type | Active-high push-pull; drives logic inputs directly without pull-up resistor, simplifying interface to µP reset pins. |
| VCC Operating Range | 1.2V to 5.5V; ensures valid output state even during brownout or deep discharge (down to 1V guaranteed). |
| Hysteresis | 100mV (typ); prevents false resets during noisy or slowly decaying supply rails. |
| Propagation Delay | 6.3µs (typ, falling edge); provides fast response to critical undervoltage events in real-time systems. |
| Tempco | 40ppm/°C; maintains threshold stability across industrial temperature range without calibration. |
Pinout & Package
MAX6376UR29+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and reflow-process ready.
| 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 | Active-high push-pull output; sources up to 500µA (VOH ≥ 0.8×VCC) and sinks up to 1.2mA (VOL ≤ 0.4V) - directly interfaces µP reset inputs. |
| 3 | VCC | Supply input (1.2V–5.5V); powers internal circuitry and defines detection domain - no external bypass required due to ultra-low ICC. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 500nA supply current | Enables multi-year operation on CR2032 batteries in maintenance-free sensor nodes. |
| Factory-trimmed 2.93V threshold | Eliminates external resistor network and calibration, reducing BOM count and assembly cost. |
| Active-high push-pull output | Drives standard CMOS/TTL reset inputs without external pull-up, saving board area and design time. |
| 100mV hysteresis | Prevents oscillation during marginal supply conditions, ensuring single, clean reset assertion. |
| Transient immunity | Rejects VCC glitches ≤200µs at 100mV overdrive - avoids spurious resets in electrically noisy environments. |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitor powered by a single CR2032 coin cell with 2.8–3.0V nominal operating range. IC Role / Device Role / Timing Role: Voltage detector asserting active-high reset to microcontroller when battery drops below 2.93V. Use Value: Prevents data corruption and unsafe operation by triggering graceful shutdown before battery depletion. |
Use Scenario: Heart-rate monitor using BLE SoC requiring stable 3.0V rail from regulated Li+ battery. IC Role / Device Role / Timing Role: Monitors regulated 3.0V supply and forces system reset if voltage sags below 2.93V due to load surge. Use Value: Ensures reliable BLE connection integrity and sensor sampling accuracy under dynamic load conditions. |
| Industrial Wireless Node | Smart Home Smoke Detector |
Use Scenario: LoRaWAN endpoint powered by two AA alkaline cells (2.4–3.2V range) deployed in remote locations. IC Role / Device Role / Timing Role: Detects end-of-life battery condition at 2.93V and signals MCU to enter low-power alert mode. Use Value: Extends field deployment life by enabling predictive battery replacement via wireless telemetry. |
Use Scenario: Battery-backed smoke alarm with 9V primary and CR123A backup, requiring fail-safe reset at 2.93V. IC Role / Device Role / Timing Role: Provides tamper-proof undervoltage supervision for safety-critical microcontroller watchdog path. Use Value: Meets UL 217 requirement for end-of-life battery indication while maintaining functional safety integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18DBVR | 2.93V threshold, 1.6µA ICC, open-drain output, 6-pin SOT23 | Requires external pull-up; higher supply current reduces battery life in ultra-low-power designs | Choose only if open-drain flexibility or tighter 0.5% threshold tolerance is required. |
| NCP302LSN29T1G | 2.9V threshold, 1.0µA ICC, active-high push-pull, SOT23-3 | Slightly lower threshold (2.9V vs. 2.93V); ±3% accuracy over temperature vs. ±2.5% | Acceptable where 30mV threshold margin is tolerable and cost sensitivity outweighs precision needs. |
Compared with TPS3808G18DBVR and NCP302LSN29T1G, the MAX6376UR29+T delivers the lowest quiescent current (500nA), tightest threshold accuracy (±2.5%), and smallest footprint (3-pin SOT23), making it optimal for long-life, space-constrained, battery-critical applications.
Availability
MAX6376UR29+T is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial wireless nodes, smart home smoke detectors, and battery-powered IoT edge devices requiring stable component supply and long-term lifecycle support.
Supply support for MAX6376UR29+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX6375–MAX6380 family was designed specifically for ultra-low-power supply monitoring in battery-operated equipment, delivering precision voltage detection with minimal external components and zero calibration overhead.
FAQ
What is the exact reset threshold voltage of the MAX6376UR29+T?
The MAX6376UR29+T has a factory-trimmed nominal reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and does not require external adjustment. The "R29" suffix in MAX6376UR29+T explicitly denotes the 2.93V variant per Maxim's Selector Guide.
Does the MAX6376UR29+T require external components to operate?
No, the MAX6376UR29+T requires no external components. It integrates a precision bandgap reference, comparator, and trimmed resistor network to set the 2.93V threshold. Only VCC, GND, and OUT connections are needed - eliminating BOM cost, layout area, and calibration effort typically associated with discrete reset circuits.
What is the output configuration of the MAX6376UR29+T and how does it interface to a microcontroller?
The MAX6376UR29+T features an active-high push-pull output. When VCC drops below 2.93V, OUT drives logic-high (VOH ≥ 0.8×VCC); otherwise, it drives logic-low (VOL ≤ 0.4V). This allows direct connection to standard µP reset inputs without pull-up resistors - unlike open-drain alternatives that require external biasing.
How does the MAX6376UR29+T handle power-supply transients?
The MAX6376UR29+T ignores fast negative-going VCC transients up to 200µs wide when the overdrive (VTH – VCC) is 100mV, as confirmed in its Typical Operating Characteristics. This built-in transient immunity prevents false resets caused by switching noise or load surges, enhancing system reliability in electrically harsh environments.
Is the MAX6376UR29+T compatible with lead-free PCB assembly processes?
Yes, the MAX6376UR29+T is supplied in lead-free packaging, indicated by the "+T" suffix. It complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and supports standard Pb-free reflow profiles (peak temperature ≤260°C), making it fully compatible with RoHS-compliant manufacturing lines.
MAX6376UR29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6376UR29+T FAQ
1.How can I place an order for MAX6376UR29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6376UR29+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 MAX6376UR29+T reliable?
The price and inventory of MAX6376UR29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6376UR29+T is usually 5 days.
3.What payment methods are accepted for MAX6376UR29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6376UR29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6376UR29+T?
MAX6376UR29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6376UR29+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 MAX6376UR29+T?
For technical support, including MAX6376UR29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6376UR29+T requirements.
6.How does Aetrix verify that MAX6376UR29+T is sourced from the original manufacturer or authorized distributors?
All MAX6376UR29+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 MAX6376UR29+T meets industry standards.
7.What is the process for return or replacement of MAX6376UR29+T?
All MAX6376UR29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6376UR29+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 MAX6376UR29+T part is unused and in its original packaging.
Return procedure for MAX6376UR29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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