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Analog Devices Inc./Maxim Integrated MAX6377XR31-T
- Part No.:
- MAX6377XR31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6377XR31-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,571
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Product details
Overview
MAX6377XR31-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed threshold of 3.08V ±2.5%, 500nA supply current, and operation down to 1V VCC. It monitors regulated system or battery voltages in portable equipment and asserts OUT low when VCC falls below threshold.
For engineers reviewing the MAX6377XR31-T datasheet, MAX6377XR31-T pinout, MAX6377XR31-T application, or MAX6377XR31-T equivalent, this device serves as a precision reset supervisor for microcontroller power sequencing, battery voltage monitoring, and low-quiescent-power supply supervision where transient immunity and minimal component count are critical.
Technical Context
The MAX6377XR31-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.08V trip point. Its open-drain output requires an external pull-up and sinks current only when asserted (VCC < VTH), enabling flexible logic-level interfacing up to 5.5V.
It features built-in immunity to fast negative-going VCC transients-its propagation delay (6.3µs typical) and hysteresis (0.1mV) ensure stable output during brief supply dips. Guaranteed correct logic state down to 1V VCC supports brown-out detection in deeply discharged battery scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 3.08V ±2.5% over -40°C to +85°C - ensures reliable reset assertion across industrial temperature range |
| Supply Current | 500nA typical 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 (falling edge) - provides fast response to undervoltage events without false triggering |
| VCC Operating Range | 1.2V to 5.5V - supports operation during startup, brown-out, and post-regulator monitoring |
| Threshold Hysteresis | 0.1mV - prevents chatter near trip point under noisy or slowly recovering supplies |
| Tempco | 40ppm/°C - maintains tight threshold stability across temperature without calibration |
Pinout & Package
MAX6377XR31-T is housed in a 3-pin SC70 package (2.0mm × 1.25mm × 0.9mm), optimized for space-constrained portable designs. Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC.
| 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-low open-drain output - requires external pull-up resistor to define high-state voltage and sink capability |
| 3 | VCC | Supply input - powers internal circuitry and sets operating range; tolerates 1.2V–5.5V with guaranteed functionality down to 1V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 500nA supply current | Enables use in always-on battery-backed systems without measurable drain impact |
| ±2.5% threshold accuracy over temperature | Eliminates need for external trimming or calibration in production |
| Open-drain output with 5.5V tolerance | Permits direct interface to 1.8V, 3.3V, or 5V logic domains using appropriate pull-up |
| Transient immunity up to 200µs (at 100mV overdrive) | Rejects common switching noise and short supply glitches without false resets |
| No external components required | Reduces BOM count, PCB area, and assembly cost versus discrete resistor-divider solutions |
Applications
| Microcontroller Power Sequencing | Battery Voltage Monitoring |
|---|---|
Use Scenario: Ensuring clean reset assertion before MCU firmware execution during Li-ion battery discharge from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Voltage detector providing active-low reset signal to MCU's RESET pin upon crossing 3.08V threshold. Use Value: Prevents erratic MCU behavior during brown-out by guaranteeing reset remains asserted until VCC rises above 3.08V + hysteresis. | Use Scenario: Monitoring single-cell alkaline battery in wireless sensor node to trigger low-battery alert before cutoff. IC Role / Device Role / Timing Role: Threshold comparator asserting open-drain output to wake microcontroller interrupt pin when battery drops below 3.08V. Use Value: Achieves 500nA quiescent current draw, extending usable battery life by >30% versus higher-current supervisors. |
| DC/DC Converter Supervision | Portable Medical Device Safety |
Use Scenario: Validating stable output of 3.3V LDO after power-up in handheld diagnostic instrument. IC Role / Device Role / Timing Role: Detecting regulated 3.3V rail and holding system in reset until voltage settles above 3.08V. Use Value: Provides deterministic power-on reset timing independent of LDO soft-start characteristics. | Use Scenario: Enabling fail-safe shutdown in wearable ECG monitor when primary battery reaches end-of-life. IC Role / Device Role / Timing Role: Active-low detector driving enable/disable control of analog front-end amplifier chain. Use Value: Guarantees functional safety compliance by asserting fault condition before supply drops below minimum analog circuit operating voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB30DBZR | 3.0V threshold, 350nA ICC, SOT23-3 package, push-pull output | Lacks open-drain flexibility; requires compatible logic family for reset assertion | Select when board layout already uses push-pull reset and lower supply current is prioritized |
| APX803S-30SA-7 | 3.0V threshold, 1.6µA ICC, SOT23-3, open-drain, ±1% accuracy | Higher supply current limits battery lifetime; tighter accuracy adds cost without benefit for most portable apps | Select when ±1% threshold tolerance is mandated by system specification and 500nA is not required |
Compared with TLV803EB30DBZR and APX803S-30SA-7, the MAX6377XR31-T uniquely balances ultra-low 500nA current, open-drain configurability, and 3.08V threshold - making it optimal for space- and energy-constrained designs requiring flexible reset signaling and long battery service intervals.
Availability
MAX6377XR31-T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, and handheld test equipment requiring stable component supply and long-term lifecycle support.
Supply support for MAX6377XR31-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, mixed-signal, and power management ICs for industrial, automotive, and consumer applications.
The MAX6375–MAX6380 series was developed specifically for ultra-low-power voltage monitoring in battery-critical systems, emphasizing minimal quiescent current, factory-trimmed accuracy, and robust transient rejection without external components.
FAQ
What is the exact threshold voltage of MAX6377XR31-T and how tightly is it specified?
The MAX6377XR31-T has a nominal threshold voltage of 3.08V, with ±2.5% accuracy guaranteed over the full -40°C to +85°C operating temperature range. This corresponds to a min/max range of 2.925V to 3.150V at temperature extremes, per Table 1 in the datasheet. The "R31" suffix explicitly denotes this 3.08V factory-trimmed version.
Does MAX6377XR31-T require external components to operate?
No, the MAX6377XR31-T requires no external components for basic voltage detection functionality. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated. Only an external pull-up resistor on the open-drain OUT pin is needed to establish the high logic state - no capacitors, dividers, or trimming elements are required.
Can MAX6377XR31-T operate reliably at very low supply voltages?
Yes, the MAX6377XR31-T guarantees correct output logic state down to 1V VCC, and operates across a full 1.2V to 5.5V supply range. This enables reliable brown-out detection even as batteries discharge deeply - for example, detecting failure of a 3.0V nominal LiFePO₄ cell before it drops below 2.5V.
What package type and dimensions does MAX6377XR31-T use?
The MAX6377XR31-T is supplied in a 3-pin SC70 package (2.0mm × 1.25mm × 0.9mm body size). Its top marking is "ADR", and it is only available in tape-and-reel format. The SC70 footprint is pin-compatible with the SOT23-3 but offers a smaller silicon area and reduced thermal mass.
How does MAX6377XR31-T handle power supply transients?
The MAX6377XR31-T is designed to ignore fast negative-going VCC transients: the Typical Operating Characteristics graph shows it rejects pulses up to ~200µs wide when the overdrive (VTH – VCC) is 100mV. This immunity prevents false resets caused by switching regulator noise or load-step-induced dips, ensuring robust operation in electrically noisy environments.
MAX6377XR31-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:
- 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:
- SC-70-3
MAX6377XR31-T FAQ
1.How can I place an order for MAX6377XR31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377XR31-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 MAX6377XR31-T reliable?
The price and inventory of MAX6377XR31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377XR31-T is usually 5 days.
3.What payment methods are accepted for MAX6377XR31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377XR31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377XR31-T?
MAX6377XR31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377XR31-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 MAX6377XR31-T?
For technical support, including MAX6377XR31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377XR31-T requirements.
6.How does Aetrix verify that MAX6377XR31-T is sourced from the original manufacturer or authorized distributors?
All MAX6377XR31-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 MAX6377XR31-T meets industry standards.
7.What is the process for return or replacement of MAX6377XR31-T?
All MAX6377XR31-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377XR31-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 MAX6377XR31-T part is unused and in its original packaging.
Return procedure for MAX6377XR31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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