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Analog Devices Inc./Maxim Integrated MAX6377XR26+T
- Part No.:
- MAX6377XR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6377XR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,489
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Product details
Overview
MAX6377XR26+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed threshold of 2.63V ±2.5% over temperature, 500nA supply current at +25°C, and guaranteed operation down to 1V VCC. It monitors system supply voltage in portable battery-powered equipment and asserts OUT low when VCC falls below threshold.
For engineers reviewing the MAX6377XR26+T datasheet, MAX6377XR26+T pinout, MAX6377XR26+T application, or MAX6377XR26+T equivalent, this device is selected for precision brown-out detection in space-constrained, low-quiescent-current systems requiring SC70-3 packaging and open-drain logic compatibility with mixed-voltage I/O domains.
Technical Context
The MAX6377XR26+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.63V trip point, eliminating external components. Its open-drain output sinks up to 100µA while asserted and supports pull-up to any voltage ≤5.5V.
It features built-in immunity to fast VCC transients-rejecting negative glitches up to 200µs at 30mV overdrive-and guarantees correct output state (OUT = low) for VCC ≥1V. Propagation delay is 6.3µs (typ) with ±40°C to +85°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±2.5% over -40°C to +85°C - ensures reliable brown-out detection across industrial temperature range |
| Supply Current | 500nA at +25°C - enables multi-year battery life in coin-cell–powered devices |
| Output Type | Active-low open-drain - allows wired-OR configuration and level-shifting via external pull-up |
| Propagation Delay | 6.3µs typical - provides fast response to supply droop without false triggering on noise |
| VCC Operating Range | 1.2V to 5.5V - supports monitoring of Li⁺, NiMH, and regulated 3.3V/5V rails |
| Threshold Hysteresis | 100mV - prevents output chatter during slow VCC recovery near trip point |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint ideal for wearables and compact IoT sensors |
Pinout & Package
MAX6377XR26+T is housed in a lead-free 3-pin SC70 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| 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 - requires external pull-up resistor; sinks current only when VCC < 2.63V |
| 3 | VCC | Supply input - powers internal circuitry and defines monitored rail; operates from 1.2V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA supply current enables >10-year shelf life in always-on battery backup circuits |
| Factory-trimmed VTH | 2.63V threshold with ±2.5% accuracy eliminates calibration overhead and reduces BOM count |
| Transient immunity | Rejects VCC glitches ≤200µs duration - avoids spurious resets during switching noise or load transients |
| 1V minimum VCC | Guaranteed output state down to 1V - supports deep brown-out detection before system shutdown |
| SC70-3 footprint | 2.0mm × 2.1mm package saves >40% board area vs. SOT23-3 - critical for miniaturized medical sensors |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 2.6V nominal output. IC Role / Device Role / Timing Role: Voltage detector asserting reset to microcontroller when battery drops below 2.63V. Use Value: Prevents data corruption and sensor misreadings by initiating graceful shutdown before brown-out-induced MCU lockup. |
Use Scenario: Heart-rate monitor using low-power BLE SoC with 3.0V regulated supply. IC Role / Device Role / Timing Role: Brown-out detector triggering power-save mode when input rail sags due to peak current draw. Use Value: Extends usable battery runtime by 12% through early warning of impending supply collapse. |
| Industrial Wireless Node | Smart Home Sensor Hub |
Use Scenario: LoRaWAN endpoint powered by primary lithium thionyl chloride (LiSOCl₂) cell with 3.6V nominal. IC Role / Device Role / Timing Role: Monitors main supply and pulls MCU reset line low upon crossing 2.63V threshold. Use Value: Ensures deterministic firmware restart before voltage collapse corrupts EEPROM writes or radio state. |
Use Scenario: Battery-backed Zigbee hub with dual-supply architecture (USB + CR123A). IC Role / Device Role / Timing Role: Detects primary battery depletion and switches control to USB domain via open-drain OR-ing. Use Value: Enables seamless power-source handover without host software intervention or external logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EC26DBVR | 2.63V threshold, 350nA ICC, SOT23-3 package - lower quiescent current but larger footprint | Requires PCB layout change due to SOT23-3 vs. SC70-3; no GND pin relocation needed | Select when absolute lowest ICC is prioritized and board area permits SOT23-3 |
| APX803S-26SA-7 | 2.63V threshold, 600nA ICC, SC70-3 package - same footprint but ±3% VTH tolerance | Acceptable where ±3% threshold accuracy suffices; identical mounting and thermal profile | Select when cost sensitivity outweighs need for ±2.5% accuracy and long-term stability |
Compared with TLV803EC26DBVR and APX803S-26SA-7, the MAX6377XR26+T delivers tighter threshold accuracy in the smallest possible footprint while maintaining industry-leading 500nA supply current - making it optimal for next-generation ultra-compact, long-life battery systems.
Availability
MAX6377XR26+T is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial wireless nodes, and smart home sensor hubs requiring stable component supply, lead-free compliance, and tape-and-reel delivery for automated assembly.
Supply support for MAX6377XR26+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 and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration for demanding environments.
The MAX6375–MAX6380 family was developed specifically for ultra-low-power voltage monitoring in battery-critical systems - delivering factory-trimmed accuracy, transient immunity, and minimal board space requirements without external components.
FAQ
What is the exact reset threshold voltage of the MAX6377XR26+T?
The MAX6377XR26+T has a factory-trimmed nominal reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +85°C. This value is confirmed in Table 1 of the official datasheet and applies specifically to the R26 suffix variant of the MAX6377XR26+T.
Does the MAX6377XR26+T support operation below 1.2V VCC?
Yes - the MAX6377XR26+T guarantees correct output logic state (OUT = low when VCC < 2.63V) down to 1.0V VCC, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. However, the minimum functional VCC for reliable detection onset is 1.2V per the recommended operating conditions.
Can the MAX6377XR26+T be used with a 5V pull-up on the OUT pin?
Yes - the MAX6377XR26+T open-drain OUT pin is rated for voltages up to 5.5V, so a 5V pull-up is fully supported. The datasheet confirms that OUT can be pulled up to any supply voltage ≤5.5V, enabling direct interfacing with 5V logic families without level shifters.
How does the MAX6377XR26+T handle short VCC transients?
The MAX6377XR26+T rejects negative-going VCC transients up to 200µs in duration when the overdrive (VTH – VCC) is 30mV, as shown in Figure MAX6375-04. This built-in glitch immunity prevents false resets during switching regulator noise or load-step events without requiring external RC filtering.
Is the MAX6377XR26+T pin-compatible with other variants in the MAX6375–MAX6380 family?
No - while all MAX6375–MAX6380 devices share the same SC70-3 and SOT23-3 footprints and pinout (GND, OUT, VCC), the MAX6377XR26+T is not functionally interchangeable with push-pull variants like MAX6376XR26+T due to its open-drain output structure and active-low assertion logic.
MAX6377XR26+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:
- 2.63V
- 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
MAX6377XR26+T FAQ
1.How can I place an order for MAX6377XR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377XR26+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 MAX6377XR26+T reliable?
The price and inventory of MAX6377XR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377XR26+T is usually 5 days.
3.What payment methods are accepted for MAX6377XR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377XR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377XR26+T?
MAX6377XR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377XR26+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 MAX6377XR26+T?
For technical support, including MAX6377XR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377XR26+T requirements.
6.How does Aetrix verify that MAX6377XR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6377XR26+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 MAX6377XR26+T meets industry standards.
7.What is the process for return or replacement of MAX6377XR26+T?
All MAX6377XR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377XR26+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 MAX6377XR26+T part is unused and in its original packaging.
Return procedure for MAX6377XR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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