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Analog Devices Inc./Maxim Integrated MAX6377UR31+T
- Part No.:
- MAX6377UR31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6377UR31+T.pdf
- Description:
- IC VOLT DETECT LP 3.08V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6377UR31+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector designed for battery and power-supply monitoring in portable systems. It features a factory-trimmed 3.08V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to 1V VCC. It asserts OUT low when VCC falls below VTH and is used in precision reset supervision for microcontrollers in battery-powered IoT sensors.
For engineers reviewing the MAX6377UR31+T datasheet, MAX6377UR31+T pinout, MAX6377UR31+T application, or MAX6377UR31+T equivalent, key selection criteria include its 3.08V trip point, open-drain output compatibility with mixed-voltage logic, transient immunity up to 200µs at 100mV overdrive, and SOT23-3 footprint suitability for space-constrained PCB layouts.
Technical Context
The MAX6377UR31+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.08V detection threshold. Its open-drain output requires an external pull-up and sinks up to 100µA while asserted, enabling flexible interfacing across logic families.
It ignores fast negative-going VCC transients - maximum tolerable glitch duration is 200µs at 100mV overdrive (VTH − VCC), decreasing as overdrive increases. The device operates reliably from VCC = 1.2V to 5.5V and maintains ±2.5% threshold accuracy across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.08V nominal, ±2.5% over −40°C to +85°C - ensures accurate brown-out detection for 3.3V systems |
| Supply Current | 500nA typical at +25°C - enables multi-year battery life in coin-cell–powered devices |
| Output Type | Active-low open-drain - supports wired-OR reset buses and level translation via external pull-up |
| VCC Operating Range | 1.2V to 5.5V - functions during deep brown-out and across diverse supply rails |
| Propagation Delay | 6.3µs typical (falling edge) - provides timely reset assertion without excessive delay |
| Threshold Hysteresis | 100mV - prevents chatter near trip point during slow VCC recovery |
| Transient Immunity | Immune to ≤200µs glitches at 100mV overdrive - rejects noise without false resets |
Pinout & Package
MAX6377UR31+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOT23) | GND | Ground reference for internal bandgap and comparator - must be low-impedance connection |
| 2 (SOT23) | OUT | Active-low open-drain output - requires external pull-up resistor to define logic-high level |
| 3 (SOT23) | VCC | Supply input - powers internal circuitry and defines monitored voltage rail |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA max at +25°C - reduces quiescent load on primary battery by >99% vs. µA-class supervisors |
| Factory-trimmed VTH | 3.08V with ±2.5% tolerance over full temp range - eliminates calibration overhead and external resistor networks |
| Open-drain output | Sinks 100µA at VOL ≤0.4V - compatible with 1.8V, 3.3V, and 5V logic pull-ups without level shifters |
| No external components | Self-contained detection circuit - reduces BOM count, board area, and qualification effort |
| Transient rejection | Immune to VCC glitches ≤200µs at 100mV overdrive - avoids spurious resets in noisy power environments |
Applications
| Wearable Health Monitor | Smart Sensor Node |
|---|---|
Use Scenario: Coin-cell–powered ECG patch monitors heart rate continuously for 12+ months. IC Role / Device Role / Timing Role: Voltage supervisor asserting MCU reset when battery drops below 3.08V to prevent data corruption. Use Value: 500nA ICC extends usable battery life by >30% versus 1µA alternatives; open-drain output interfaces directly to 1.8V MCU reset pin. |
Use Scenario: LoRaWAN soil moisture sensor deployed outdoors with seasonal temperature swings. IC Role / Device Role / Timing Role: Brown-out detector ensuring clean MCU restart during solar-charger undervoltage events. Use Value: ±2.5% VTH accuracy over −40°C to +85°C guarantees reliable reset across all operating conditions without firmware compensation. |
| Industrial Handheld Scanner | Medical Infusion Pump Controller |
Use Scenario: Ruggedized barcode scanner powered by removable Li-ion pack with variable discharge profile. IC Role / Device Role / Timing Role: Power-on reset and supply monitoring IC generating clean, glitch-immune reset pulse. Use Value: 200µs transient immunity prevents false resets during motor-induced supply dips; SOT23-3 fits tight mechanical envelope. |
Use Scenario: Battery-backed infusion pump controller requiring fail-safe shutdown before critical voltage loss. IC Role / Device Role / Timing Role: Primary voltage monitor triggering controlled pump stop and alarm when main supply falls below 3.08V. Use Value: Guaranteed operation down to 1.2V VCC ensures supervision remains active even during deep brown-out, supporting safe state retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EC29DBVR | 3.00V threshold, 350nA ICC, push-pull output, same SOT23-3 package | Push-pull eliminates need for external pull-up but lacks wired-OR capability | Select when system uses single-reset bus and lowest possible ICC is critical |
| APX803S-30SA-7 | 3.00V threshold, 600nA ICC, open-drain output, SOT23-3, ±2.0% accuracy | Higher accuracy but slightly higher ICC; no transient immunity spec provided | Select when tighter threshold tolerance is required and transient environment is benign |
Compared with TLV803EC29DBVR and APX803S-30SA-7, the MAX6377UR31+T offers superior transient immunity (200µs validated), identical package compatibility, and optimal balance of 3.08V trip point, 500nA ICC, and open-drain flexibility for multi-rail reset architectures.
Availability
MAX6377UR31+T is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, and industrial handheld scanners requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX6377UR31+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 demanding industrial, medical, and communications applications.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in battery-critical systems - prioritizing nanoscale ICC, factory-trimmed thresholds, and robust transient rejection in minimal footprints.
FAQ
What is the exact reset threshold voltage of the MAX6377UR31+T?
The MAX6377UR31+T has a factory-trimmed nominal reset threshold voltage of 3.08V, 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 datasheet under suffix "R31", and applies specifically to the MAX6377UR31+T variant - not to other members of the MAX6375–MAX6380 family.
Does the MAX6377UR31+T require an external pull-up resistor on its OUT pin?
Yes, the MAX6377UR31+T features an active-low open-drain output, so an external pull-up resistor is mandatory to establish a valid logic-high level on the OUT line. The datasheet specifies that the pull-up may connect to any supply up to 5.5V, and recommends selecting a resistor value that ensures VOL ≤0.4V while sinking 100µA and accommodating connected input leakage currents.
What is the minimum VCC voltage at which the MAX6377UR31+T remains functional?
The MAX6377UR31+T is guaranteed to maintain correct output logic state down to VCC = 1.0V, per the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables. This allows it to supervise deeply discharged batteries and remain active during brown-out conditions where many competing supervisors cease operation.
How does the MAX6377UR31+T handle power supply transients?
The MAX6377UR31+T is designed to ignore fast negative-going VCC transients: it will not assert reset for glitches shorter than 200µs when VCC dips 100mV below VTH. This immunity is characterized in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Threshold Overdrive" and ensures reliable operation in electrically noisy environments like motor-driven or RF-intensive systems.
Is the MAX6377UR31+T pin-compatible with other devices in the MAX6375–MAX6380 family?
Yes - all MAX6375–MAX6380 variants, including the MAX6377UR31+T, share identical 3-pin SOT23-3 pinouts (VCC, GND, OUT) and SC70-3 pinouts. However, output logic type differs: MAX6377UR31+T has open-drain active-low output, whereas MAX6376 variants have push-pull active-high outputs - direct substitution requires verifying output compatibility with the host system.
MAX6377UR31+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:
- 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:
- SOT-23-3
MAX6377UR31+T FAQ
1.How can I place an order for MAX6377UR31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377UR31+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 MAX6377UR31+T reliable?
The price and inventory of MAX6377UR31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377UR31+T is usually 5 days.
3.What payment methods are accepted for MAX6377UR31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377UR31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377UR31+T?
MAX6377UR31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377UR31+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 MAX6377UR31+T?
For technical support, including MAX6377UR31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377UR31+T requirements.
6.How does Aetrix verify that MAX6377UR31+T is sourced from the original manufacturer or authorized distributors?
All MAX6377UR31+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 MAX6377UR31+T meets industry standards.
7.What is the process for return or replacement of MAX6377UR31+T?
All MAX6377UR31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377UR31+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 MAX6377UR31+T part is unused and in its original packaging.
Return procedure for MAX6377UR31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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