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Analog Devices Inc./Maxim Integrated MAX6380UR42-T
- Part No.:
- MAX6380UR42-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6380UR42-T.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6380UR42-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector designed for precision power-supply monitoring in battery-powered systems. It features a factory-trimmed 4.20V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V - ideal for Li-ion battery end-of-discharge detection in portable medical devices.
For engineers reviewing the MAX6380UR42-T datasheet, MAX6380UR42-T pinout, MAX6380UR42-T application, or MAX6380UR42-T equivalent, this device serves as a critical reset supervisor where low quiescent current, transient immunity, and precise 4.2V trip point are mandatory for system reliability and battery life optimization.
Technical Context
The MAX6380UR42-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.20V threshold without external components. Its open-drain output sinks up to 100µA while asserted and supports pull-up to any voltage ≤5.5V, enabling flexible interfacing with diverse logic families.
It rejects fast negative-going VCC transients via built-in hysteresis (9.5mV typical) and propagation delay filtering, with immunity validated up to 200µs for 100mV overdrive. The device operates across -40°C to +85°C and maintains ±2.5% threshold accuracy over that full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.20V nominal, ±2.5% over -40°C to +85°C - ensures reliable Li-ion battery undervoltage lockout before deep discharge. |
| Supply Current | 500nA at +25°C - extends battery life in always-on wearable sensors and IoT edge nodes. |
| Output Type | Active-low open-drain - allows wired-OR reset bus configuration and level-shifting via external pull-up. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during brown-out and enables use with 1.8V/3.3V/5V rails. |
| Propagation Delay | 9.5µs typical (falling edge) - provides fast response to supply collapse without false triggering on noise. |
| Threshold Hysteresis | 9.5mV typical - prevents chatter during slow VCC recovery near trip point. |
| Tempco | 40ppm/°C - guarantees stable threshold drift across industrial temperature range. |
Pinout & Package
MAX6380UR42-T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with SC70-3 but with higher power dissipation rating (320mW at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOT23) | GND | Ground reference for internal bandgap and comparator - must be low-impedance connection to system ground plane. |
| 2 (SOT23) | OUT | Active-low open-drain output - requires external pull-up resistor; sinks current when VCC < 4.20V. |
| 3 (SOT23) | VCC | Supply input - monitors this rail directly; operates down to 1.2V with full functionality. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internally trimmed 4.20V threshold eliminates resistor dividers and calibration - reduces BOM count and layout area by 2–3 components. |
| Ultra-low 500nA supply current | Enables multi-year battery life in coin-cell-powered devices such as glucose meters and asset trackers. |
| Open-drain output with 5.5V tolerance | Permits pull-up to higher-voltage logic (e.g., 5V MCU I/O) while powered from 3.3V or lower - simplifies mixed-rail designs. |
| Guaranteed operation down to VCC = 1V | Ensures valid reset assertion even during severe brown-out or battery sag - critical for fail-safe shutdown. |
| Transient immunity up to 200µs | Rejects ESD-induced or switching regulator glitches without requiring external RC filtering - saves board space and design time. |
Applications
| Portable Medical Sensors | Li-ion Battery Protection Circuits |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring undervoltage cutoff before battery depletion damages sensor calibration. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset to microcontroller when battery drops below 4.20V - halting measurement and entering deep sleep. Use Value: Prevents data corruption and extends usable battery life by 12–18% versus fixed 3.6V detectors, due to precise match to Li-ion discharge curve endpoint. |
Use Scenario: Secondary protection circuit in smart battery pack, independent of primary fuel gauge IC, to cut off discharge FET if cell voltage falls below safe limit. IC Role / Device Role / Timing Role: Standalone reset supervisor monitoring pack voltage; open-drain output drives gate of high-side load switch FET. Use Value: Adds hardware-level safety redundancy with <500nA quiescent draw - avoids parasitic drain that would compromise months-long shelf life. |
| Industrial Wireless Sensor Nodes | Low-Power RTU Power Sequencing |
|
Use Scenario: LoRaWAN node powered by solar-charged LiFePO₄ battery, operating intermittently in remote locations with no maintenance access. IC Role / Device Role / Timing Role: Power-good monitor enabling MCU wake-up only when VCC ≥4.20V - prevents boot failure during low-light charging periods. Use Value: Eliminates repeated failed boot attempts and associated RF transmission retries, reducing average system current by 3.2µA per cycle. |
Use Scenario: Remote terminal unit with dual-rail power (5V analog front-end, 3.3V digital core), requiring controlled startup sequence after AC power restoration. IC Role / Device Role / Timing Role: 4.20V detector triggers enable signal to 3.3V LDO only after 5V rail stabilizes above threshold - enforcing strict sequencing. Use Value: Prevents latch-up and I/O contention during power-up by ensuring analog section powers first, with no additional timing IC or RC network needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EC42DBZR | 4.2V threshold, 350nA supply current, push-pull output (not open-drain), SOT23-3 package. | Lacks open-drain flexibility; cannot wire-OR multiple reset sources or interface to 5V logic without level shifter. | Select when lowest possible quiescent current is priority and system uses single-supply logic with no need for shared reset bus. |
| APX803L-42SA-7 | 4.2V threshold, 1.1µA supply current, open-drain output, same SOT23-3 footprint. | Higher ICC reduces battery life in ultra-low-power applications; tempco not specified beyond ±2.5%. | Select when cost sensitivity outweighs nanoampere-level current savings and full industrial tempco validation is not required. |
Compared with TLV803EC42DBZR and APX803L-42SA-7, the MAX6380UR42-T uniquely balances 500nA supply current, guaranteed open-drain operation, and ±2.5% threshold accuracy over full temperature range - making it the optimal choice for battery-critical, multi-rail, or safety-redundant designs where both precision and ultra-low power are non-negotiable.
Availability
MAX6380UR42-T is available at Aetrix Electronics and suitable for portable medical sensors, Li-ion battery protection circuits, and industrial wireless sensor nodes requiring stable component supply with long-term lifecycle support.
Supply support for MAX6380UR42-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 voltage monitoring in space-constrained, battery-operated equipment - delivering precision thresholds, nanoscale current, and robust transient immunity in minimal 3-pin packages.
FAQ
What is the exact factory-trimmed threshold voltage of the MAX6380UR42-T?
The MAX6380UR42-T has a nominal reset threshold voltage of 4.20V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed at wafer test and confirmed in Table 1 of the datasheet under suffix "R42". The MAX6380UR42-T does not require external calibration or adjustment to achieve this specification.
Does the MAX6380UR42-T support operation below 1.8V supply?
Yes, the MAX6380UR42-T is fully functional down to VCC = 1.2V and guaranteed to assert its open-drain output correctly down to VCC = 1V. This capability enables reliable reset generation even during deep battery discharge or brown-out conditions - a key differentiator from many competing voltage detectors that cease operation below 1.6V.
What is the maximum sink current capability of the MAX6380UR42-T's open-drain output?
The MAX6380UR42-T's open-drain OUT pin can sink up to 100µA while asserted (VCC ≥1.2V), with VOL ≤0.4V. For higher-current loads, an external MOSFET or buffer is required. This 100µA rating is sufficient to drive standard CMOS inputs and most microcontroller reset pins directly when paired with a properly sized pull-up resistor.
Can the MAX6380UR42-T be used with a 5V pull-up resistor despite being powered from 3.3V?
Yes, the MAX6380UR42-T's open-drain OUT pin is rated to 5.5V, allowing direct connection to a 5V pull-up resistor even when VCC = 3.3V. This enables seamless interfacing with 5V-tolerant microcontrollers or logic families without level-shifting circuitry - a feature explicitly supported in the Applications Information section of the datasheet.
How does the MAX6380UR42-T handle short voltage transients on the VCC line?
The MAX6380UR42-T incorporates internal filtering and hysteresis to reject fast negative-going VCC transients. As shown in Figure MAX6375-04, it tolerates transients up to 200µs wide when the overdrive (VTH – VCC) is 100mV. This immunity eliminates the need for external RC filters in noisy environments like motor-driven or switching-power-supply applications.
MAX6380UR42-T 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:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.2V
- 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
MAX6380UR42-T FAQ
1.How can I place an order for MAX6380UR42-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6380UR42-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 MAX6380UR42-T reliable?
The price and inventory of MAX6380UR42-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6380UR42-T is usually 5 days.
3.What payment methods are accepted for MAX6380UR42-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6380UR42-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6380UR42-T?
MAX6380UR42-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6380UR42-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 MAX6380UR42-T?
For technical support, including MAX6380UR42-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6380UR42-T requirements.
6.How does Aetrix verify that MAX6380UR42-T is sourced from the original manufacturer or authorized distributors?
All MAX6380UR42-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 MAX6380UR42-T meets industry standards.
7.What is the process for return or replacement of MAX6380UR42-T?
All MAX6380UR42-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6380UR42-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 MAX6380UR42-T part is unused and in its original packaging.
Return procedure for MAX6380UR42-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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