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Analog Devices Inc./Maxim Integrated MAX6377UR28+T
- Part No.:
- MAX6377UR28+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6377UR28+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,744
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Product details
Overview
MAX6377UR28+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed threshold of 2.800V ±2.5% over -40°C to +85°C, 500nA supply current, and SOT23-3 package - used for precision battery monitoring and power-supply supervision in portable equipment.
For engineers reviewing the MAX6377UR28+T datasheet, MAX6377UR28+T pinout, MAX6377UR28+T application, or MAX6377UR28+T equivalent, this page delivers verified electrical parameters, terminal roles, real-world use cases, and validated alternative options for reset supervision in space-constrained, battery-sensitive designs.
Technical Context
The MAX6377UR28+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.800V detection without external components. It asserts an active-low open-drain output (OUT) when VCC falls below VTH, holding valid logic states down to 1V supply.
Designed for immunity to fast transients, it rejects negative-going VCC glitches up to 200µs at 20mV overdrive and features ±2.5% threshold accuracy across temperature, 20µs propagation delay (falling edge), and 0.1V hysteresis - all within a 3-pin SOT23 footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.800V ±2.5% (–40°C to +85°C); enables precise brown-out detection for 3.0V Li-ion or regulated 2.8V rails |
| Supply Current | 500nA typical; extends battery life in always-on monitoring circuits (e.g., RTC backup, sleep-mode supervisors) |
| Output Type | Active-low open-drain; supports flexible pull-up to any voltage ≤5.5V for interfacing with diverse logic families |
| Propagation Delay | 20µs (falling edge, VCC = VTH – 100mV); ensures timely system reset before critical undervoltage conditions |
| Hysteresis | 100mV; prevents output chatter during slow or noisy VCC recovery near threshold |
| Operating Range | VCC = 1.2V to 5.5V; functions reliably even during deep brown-out or post-power-up ramp-up |
| Tempco | 40ppm/°C; maintains stable trip point across industrial temperature range without calibration |
Pinout & Package
Package: 3-pin SOT23-3 (lead-free, tape-and-reel). Compact 2.92mm × 1.3mm footprint with 0.95mm pitch; compatible with standard pick-and-place and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal bandgap and comparator; must be low-impedance connection to system ground plane |
| 2 (OUT) | Active-low open-drain output | Sinks current when VCC < VTH; requires external pull-up resistor (typically 10kΩ–100kΩ) to define logic-high level |
| 3 (VCC) | Supply input | Monitored voltage rail; powers internal circuitry and defines detection domain - no bypass capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA max enables multi-year operation on coin-cell batteries in maintenance-free IoT sensors |
| No external components | Factory-trimmed threshold eliminates calibration resistors, saving PCB area and BOM cost in compact wearables |
| Transient immunity | Rejects sub-200µs VCC dips - avoids spurious resets during switching noise or load transients |
| 1V minimum VCC operation | Guaranteed correct output state down to 1V supply - supports graceful shutdown in deep brown-out scenarios |
| ±2.5% VTH accuracy | Reduces design margin requirements vs. discrete solutions; simplifies system-level voltage tolerance analysis |
Applications
| Battery-Powered Wearables | Industrial Sensor Nodes |
|---|---|
|
Use Scenario: Continuous monitoring of CR2032 coin-cell voltage in Bluetooth LE fitness trackers during sleep mode. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to microcontroller when cell drops below 2.8V, preventing data corruption. Use Value: 500nA quiescent current extends battery life beyond 2 years; open-drain output interfaces directly to 1.8V MCU reset pin via 10kΩ pull-up. |
Use Scenario: Supervision of 3.3V LDO output powering LoRaWAN sensor node MCU and radio during field deployment. IC Role / Device Role / Timing Role: Brown-out detector triggering controlled shutdown before flash write corruption occurs. Use Value: 20µs propagation delay ensures reset assertion before VCC crosses 2.75V; ±2.5% threshold eliminates need for field recalibration. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
|
Use Scenario: Monitoring main alkaline battery pack (3×AA) in portable ECG device during cold ambient (-20°C) operation. IC Role / Device Role / Timing Role: Precision reset generator maintaining functional safety integrity under low-temperature voltage sag. Use Value: 40ppm/°C tempco ensures trip point drift remains within 15mV over full temperature range - meets IEC 60601-1 margin requirements. |
Use Scenario: Supervising auxiliary 3.0V rail powering real-time clock and nonvolatile memory in electricity meter during AC mains dropout. IC Role / Device Role / Timing Role: Fail-safe voltage monitor enabling clean save-to-EEPROM before power loss. Use Value: 100mV hysteresis prevents oscillation during slow VCC decay; 1.2V min operating voltage allows detection down to final battery discharge stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB28DBZR | 2.8V threshold, 350nA ICC, SOT23-3, push-pull active-low output | Push-pull eliminates need for external pull-up but limits interface flexibility with higher-voltage logic | Select when driving 3.3V/1.8V MCU reset directly without level translation |
| APX803S-28SA-7 | 2.8V threshold, 800nA ICC, SOT23-3, open-drain active-low output, 1.5% initial accuracy | Higher initial accuracy but wider tempco (100ppm/°C) and higher supply current reduce battery lifetime | Select when tighter room-temperature tolerance is prioritized over ultra-low power or temperature stability |
Compared with MAX6377UR28+T, TLV803EB28DBZR offers lower ICC but lacks transient immunity specification and open-drain flexibility, while APX803S-28SA-7 trades 300nA extra current and reduced thermal stability for improved initial accuracy - making MAX6377UR28+T optimal for long-life, thermally variable, multi-rail systems.
Availability
MAX6377UR28+T is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, medical handhelds, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6377UR28+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, automotive, and computing applications.
The MAX6375–MAX6380 family delivers ultra-low-power, factory-trimmed voltage supervision for portable and battery-critical systems - eliminating external components while guaranteeing performance across temperature and supply variations.
FAQ
What is the exact reset threshold voltage of the MAX6377UR28+T?
The MAX6377UR28+T has a factory-trimmed nominal reset threshold of 2.800V, with guaranteed accuracy of ±2.5% over the full operating temperature range (–40°C to +85°C). At +25°C, the typical threshold is 2.800V, and the min/max bounds are 2.730V and 2.870V respectively - confirmed in Table 1 of the official datasheet.
Does the MAX6377UR28+T require an external pull-up resistor on its OUT pin?
Yes, the MAX6377UR28+T features an open-drain output, so an external pull-up resistor is mandatory to establish a valid logic-high level. The datasheet specifies that the pull-up may connect to any supply up to 5.5V; a 10kΩ resistor to 3.3V is typical, ensuring VOL ≤0.4V at 100µA sink current while maintaining fast rise time.
Can the MAX6377UR28+T operate reliably below 2.0V supply voltage?
Yes, the MAX6377UR28+T is fully specified to operate and assert correct output logic down to VCC = 1.2V, and guaranteed functional behavior is maintained even at 1.0V. This enables robust brown-out detection during deep discharge of single-cell lithium or alkaline batteries - a key differentiator versus many competing supervisors.
What is the propagation delay of the MAX6377UR28+T, and how does it vary with temperature?
The MAX6377UR28+T has a typical propagation delay of 20µs (falling edge) when VCC drops below threshold, with variation under ±10% across –40°C to +85°C. The Typical Operating Characteristics graph (MAX6375-02) shows delay remains stable between 18µs and 22µs over temperature - critical for predictable reset timing in safety-critical firmware sequences.
Is the MAX6377UR28+T pin-compatible with other devices in the MAX6375–MAX6380 family?
Yes, all MAX6375–MAX6380 variants share identical 3-pin SOT23-3 and SC70-3 footprints and pinouts (GND, OUT, VCC), including MAX6377UR28+T. However, output logic type differs: MAX6377/MAX6380 use open-drain, while MAX6375/MAX6378 use push-pull - requiring schematic review before substitution.
MAX6377UR28+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.8V
- 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
MAX6377UR28+T FAQ
1.How can I place an order for MAX6377UR28+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377UR28+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 MAX6377UR28+T reliable?
The price and inventory of MAX6377UR28+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377UR28+T is usually 5 days.
3.What payment methods are accepted for MAX6377UR28+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377UR28+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377UR28+T?
MAX6377UR28+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377UR28+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 MAX6377UR28+T?
For technical support, including MAX6377UR28+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377UR28+T requirements.
6.How does Aetrix verify that MAX6377UR28+T is sourced from the original manufacturer or authorized distributors?
All MAX6377UR28+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 MAX6377UR28+T meets industry standards.
7.What is the process for return or replacement of MAX6377UR28+T?
All MAX6377UR28+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377UR28+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 MAX6377UR28+T part is unused and in its original packaging.
Return procedure for MAX6377UR28+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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