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Analog Devices Inc./Maxim Integrated MAX6377UR29+T
- Part No.:
- MAX6377UR29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6377UR29+T.pdf
- Description:
- IC VOLT DETECT LP 2.93V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,483
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Product details
Overview
MAX6377UR29+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed 2.93V threshold, ±2.5% accuracy over temperature, 500nA supply current, and operation down to 1V VCC - used for precision battery monitoring and power-supply supervision in portable medical sensors and IoT edge nodes.
For engineers reviewing the MAX6377UR29+T datasheet, MAX6377UR29+T pinout, MAX6377UR29+T application, or MAX6377UR29+T equivalent, key selection criteria include reset threshold tolerance, open-drain output drive capability, transient immunity, low-voltage operation margin, and SOT23-3 footprint compatibility.
Technical Context
The MAX6377UR29+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.93V detection without external components. It asserts an active-low open-drain output when VCC falls below VTH, with hysteresis of 0.1mV and guaranteed logic state retention down to 1V supply.
Designed for immunity to fast transients, it tolerates negative-going VCC glitches up to 200µs at 100mV overdrive (VTH − VCC), and features propagation delays of 6.3µs (falling) and 9.5µs (rising) across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal, ±2.5% over −40°C to +85°C - ensures reliable brown-out detection for 3.0V/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 flexible pull-up to any voltage ≤5.5V and wired-OR reset bus sharing. |
| VCC Operating Range | 1.2V to 5.5V - guarantees correct output state even during deep brown-out or cold-start conditions. |
| Propagation Delay | 6.3µs (falling), 9.5µs (rising) - provides deterministic timing for microcontroller reset sequencing. |
| Threshold Hysteresis | 0.1mV - prevents chatter during slow VCC recovery near trip point. |
| Tempco | 40ppm/°C - maintains tight threshold stability across industrial temperature range. |
Pinout & Package
MAX6377UR29+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads compatible with standard reflow profiles.
| 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 ≥100µA at VOL ≤0.4V when asserted. |
| 3 | VCC | Supply input - powers internal circuitry and defines detection domain; operates from 1.2V to 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA max - eliminates measurable drain on Li-ion or CR2032 batteries during long sleep cycles. |
| No external components | Factory-trimmed threshold and internal reference - removes calibration labor and BOM cost. |
| Transient immunity | Rejects VCC glitches <200µs at 100mV overdrive - prevents false resets in noisy power environments. |
| 1V minimum VCC operation | Valid output logic state guaranteed down to 1V - supports reset assertion through full battery discharge. |
| SOT23-3 footprint | Industry-standard 3-pin package - enables drop-in replacement and high-density PCB layout. |
Applications
| Wearable Health Monitor | Smart Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by single CR2032 cell with 2.8V–3.0V operating window. IC Role / Device Role / Timing Role: Voltage detector asserting MCU reset when battery drops below 2.93V to prevent data corruption during low-VCC operation. Use Value: Prevents invalid sensor readings and flash write errors by enforcing clean shutdown before brown-out. |
Use Scenario: LoRaWAN environmental sensor node with intermittent wake-up and 3.3V regulated rail. IC Role / Device Role / Timing Role: Supervises 3.3V DC/DC output and triggers system reset if regulator fails or input dips. Use Value: Ensures deterministic boot state after power interruption, eliminating firmware lockup in field-deployed units. |
| Industrial Handheld Terminal | Medical Infusion Pump Controller |
Use Scenario: Ruggedized barcode scanner using dual Li-ion cells with 2.9V–4.2V per cell, regulated to 3.0V. IC Role / Device Role / Timing Role: Monitors post-regulator voltage to detect regulator failure or battery imbalance. Use Value: Enables early warning of power degradation before critical function loss, supporting safe graceful shutdown. |
Use Scenario: Battery-backed infusion controller requiring fail-safe motor stop if main supply collapses. IC Role / Device Role / Timing Role: Provides immediate, glitch-immune reset signal to safety MCU upon 3.0V rail collapse. Use Value: Meets IEC 62304 Class C software safety requirements via hardware-level power supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBZR | 2.93V threshold, 350nA ICC, SOT23-3, push-pull active-low output - no open-drain flexibility. | Requires dedicated reset line; cannot share wired-OR bus with other supervisors. | Select when board space allows dedicated reset routing and lowest possible ICC is critical. |
| APX803S-29SA-7 | 2.93V threshold, 800nA ICC, SOT23-3, open-drain active-low - higher supply current, same pinout. | Compatible footprint but consumes 1.6× more quiescent current - impacts battery lifetime in ultra-low-power designs. | Select when Maxim supply chain constraints exist and 800nA ICC remains acceptable for target runtime. |
Compared with TLV803EB29DBZR and APX803S-29SA-7, the MAX6377UR29+T uniquely balances ultra-low 500nA ICC, open-drain flexibility for shared reset buses, and guaranteed 1V operation - making it optimal for battery-constrained, multi-supervisor systems requiring robust brown-out response.
Availability
MAX6377UR29+T is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, industrial handheld terminals, medical infusion pump controllers, and battery-powered IoT gateways requiring stable component supply and long-term lifecycle support.
Supply support for MAX6377UR29+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and computing markets.
The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage supervision in portable and battery-critical systems - delivering precision thresholds, nanoscale ICC, and robust transient rejection in minimal 3-pin packages.
FAQ
What is the exact reset threshold voltage of MAX6377UR29+T and how tightly is it specified?
The MAX6377UR29+T has a factory-trimmed nominal reset threshold of 2.93V, with ±2.5% accuracy over the full −40°C to +85°C operating temperature range. At +25°C, the typical threshold is 2.93V, with min/max limits of 2.857V and 3.000V respectively. This specification ensures reliable detection in 3.0V systems while accommodating battery voltage sag and temperature drift.
Does MAX6377UR29+T require external components to operate?
No, the MAX6377UR29+T requires no external components to perform its core voltage detection function. Its precision bandgap reference, comparator, and laser-trimmed resistor network are fully integrated. Only an external pull-up resistor on the open-drain OUT pin is needed to establish logic-high level - no capacitors, dividers, or trimming elements are required.
What is the minimum VCC voltage at which MAX6377UR29+T guarantees correct output logic state?
The MAX6377UR29+T guarantees correct output logic state - i.e., active-low assertion when VCC < VTH and deassertion when VCC > VTH - for supply voltages as low as 1.0V. This is explicitly specified in the datasheet and enables reliable reset assertion even during deep battery discharge or cold-start conditions where VCC may fall below typical LDO dropout.
How does MAX6377UR29+T handle short power-supply transients?
The MAX6377UR29+T is designed to ignore fast negative-going VCC transients. For a 100mV overdrive (VTH − VCC = 100mV), it rejects glitches up to 200µs duration. As overdrive increases, maximum allowable pulse width decreases - e.g., at 200mV overdrive, rejection extends to ~100µs. This prevents false resets caused by switching noise or load dump events.
Is MAX6377UR29+T pin-compatible with other members of the MAX6375–MAX6380 family?
Yes, all MAX6375–MAX6380 variants - including MAX6377UR29+T - share identical 3-pin SOT23-3 pinout (VCC, GND, OUT) and SC70-3 pinout. The only functional differences are threshold voltage and output configuration (open-drain vs. push-pull). Therefore, MAX6377UR29+T can be substituted with other UR/XR suffix parts in the same package without PCB changes, provided the application requires active-low open-drain behavior.
MAX6377UR29+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:
- 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
MAX6377UR29+T FAQ
1.How can I place an order for MAX6377UR29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377UR29+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 MAX6377UR29+T reliable?
The price and inventory of MAX6377UR29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377UR29+T is usually 5 days.
3.What payment methods are accepted for MAX6377UR29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377UR29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377UR29+T?
MAX6377UR29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377UR29+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 MAX6377UR29+T?
For technical support, including MAX6377UR29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377UR29+T requirements.
6.How does Aetrix verify that MAX6377UR29+T is sourced from the original manufacturer or authorized distributors?
All MAX6377UR29+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 MAX6377UR29+T meets industry standards.
7.What is the process for return or replacement of MAX6377UR29+T?
All MAX6377UR29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377UR29+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 MAX6377UR29+T part is unused and in its original packaging.
Return procedure for MAX6377UR29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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