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Analog Devices Inc./Maxim Integrated MAX6377UR30-T
- Part No.:
- MAX6377UR30-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6377UR30-T.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:37,500
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Product details
Overview
MAX6377UR30-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector optimized for battery and power-supply monitoring in portable systems. It features a factory-trimmed 3.00V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. Its primary circuit role is system reset assertion during brownout conditions in Li+-powered or regulated 3.3V subsystems.
For engineers reviewing the MAX6377UR30-T datasheet, MAX6377UR30-T pinout, MAX6377UR30-T application, or MAX6377UR30-T equivalent, this page delivers verified electrical parameters, SOT23-3 package details, transient-immune reset behavior, and validated alternative options for precision low-power voltage monitoring.
Technical Context
The MAX6377UR30-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.00V trip point-no external components required. Its open-drain output sinks current when VCC falls below threshold, enabling flexible pull-up to any logic rail ≤5.5V.
It ignores fast negative-going transients on VCC via internal filtering; maximum tolerable glitch duration decreases as threshold overdrive increases (e.g., ≤200µs at 100mV overdrive). Propagation delay is 6.3µs (falling) and 9.5µs (rising) across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V ±2.5% over -40°C to +85°C - ensures reliable brownout detection for 3.3V-regulated or Li+ battery 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-shifting with external pull-up. |
| VCC Operating Range | 1.2V to 5.5V - functions during deep discharge (e.g., down to 1.2V) while maintaining correct output state. |
| Propagation Delay | 6.3µs (falling), 9.5µs (rising) - provides deterministic timing for microcontroller reset sequencing. |
| Threshold Hysteresis | 100mV - prevents chatter during slow VCC recovery near trip point. |
| Tempco | 40ppm/°C - minimizes drift across industrial temperature range. |
Pinout & Package
MAX6377UR30-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 | 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 (typically 10kΩ–100kΩ) to define logic-high voltage. |
| 3 | VCC | Supply input; monitors this rail directly; operates from 1.2V to 5.5V with full functionality down to 1V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year battery life in always-on monitoring applications. |
| Factory-trimmed threshold | 3.00V ±2.5% eliminates calibration effort and reduces BOM count vs. discrete resistor-divider solutions. |
| Transient immunity | Rejects VCC glitches ≤200µs (at 100mV overdrive), preventing false resets in noisy power environments. |
| No external components | Integrated reference, comparator, and trimming reduce PCB area and assembly cost by eliminating 3–4 passive parts. |
| Wide VCC range | Operates from 1.2V to 5.5V, supporting both low-voltage microcontrollers and standard 3.3V/5V logic rails. |
Applications
| Portable Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring 10+ year shelf life and reliable low-battery warning before shutdown. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset to MCU when battery drops below 3.00V, triggering data save and safe sleep. Use Value: 500nA supply current extends operational lifetime; ±2.5% threshold accuracy ensures consistent low-battery flag across temperature. |
Use Scenario: Wireless vibration sensor node deployed in factory machinery, powered by energy-harvested 3.3V rail with intermittent dropout. IC Role / Device Role / Timing Role: Brownout detector holding MCU in reset until regulated 3.3V rail stabilizes post-transient. Use Value: 100mV hysteresis prevents oscillation during slow rail recovery; 6.3µs propagation delay enables fast, deterministic reset release. |
| Li+ Battery-Powered Wearables | Automotive Body Control Modules |
Use Scenario: Smartwatch using single-cell Li+ (2.7–4.2V) with fuel gauge and real-time clock; needs precise undervoltage lockout at 3.0V. IC Role / Device Role / Timing Role: System supervisor asserting open-drain reset signal to PMIC and application processor upon VBAT decay. Use Value: Open-drain output allows shared reset bus with other peripherals; 1.2V minimum VCC operation detects deep discharge before protection circuit triggers. |
Use Scenario: Door module with CAN interface and microcontroller, powered from vehicle's 12V-to-3.3V DC/DC converter subject to load-dump transients. IC Role / Device Role / Timing Role: Reset generator ensuring MCU remains held in reset during input rail collapse or noise spikes. Use Value: Immunity to ≤200µs VCC glitches avoids spurious resets during engine cranking; -40°C to +85°C rating matches under-hood requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EC30DBZR | 3.00V threshold, 350nA supply current, push-pull active-low output, SOT23-3 package. | Push-pull eliminates need for external pull-up but lacks wired-OR capability; lower ICC benefits ultra-low-power designs. | Select when board space permits no external resistor and deterministic high-Z output is not required. |
| APX803S3023-26SA-7 | 3.00V threshold, 1.1µA supply current, open-drain active-low output, SOT23-3 package, ±1.5% room-temp accuracy. | Higher ICC reduces battery life vs. MAX6377UR30-T; tighter initial accuracy but wider tempco (60ppm/°C). | Choose when tighter initial tolerance is prioritized over ultra-low ICC and long-term temperature stability. |
Compared with TLV803EC30DBZR and APX803S3023-26SA-7, the MAX6377UR30-T uniquely balances 500nA ICC, ±2.5% over temperature accuracy, and open-drain flexibility-making it optimal for battery-constrained systems requiring robust reset signaling across wide thermal ranges.
Availability
MAX6377UR30-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, Li+ battery-powered wearables, and automotive body control modules requiring stable component supply and long-lifecycle support.
Supply support for MAX6377UR30-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 and mixed-signal ICs for power, sensing, and interface applications, with emphasis on high reliability and low power.
The MAX6375–MAX6380 family was developed specifically for ultra-low-power voltage monitoring in battery-critical systems, delivering factory-trimmed thresholds and sub-µA operation without external components.
FAQ
What is the exact reset threshold voltage of the MAX6377UR30-T?
The MAX6377UR30-T has a nominal reset threshold of 3.00V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). At +25°C, the typical threshold is 3.00V, and the min/max limits are 2.925V and 3.075V respectively, as confirmed in Table 1 of the official datasheet.
Does the MAX6377UR30-T require an external pull-up resistor on its OUT pin?
Yes, the MAX6377UR30-T features an open-drain active-low output, so an external pull-up resistor is mandatory to establish a valid logic-high level. The datasheet recommends selecting a resistor value that ensures VOL ≤0.4V at ISINK = 100µA while providing sufficient current for connected loads; typical values range from 10kΩ to 100kΩ pulled to 1.8V–5.5V.
Can the MAX6377UR30-T operate reliably below 1.8V supply voltage?
Yes, the MAX6377UR30-T is fully specified to operate down to VCC = 1.2V and guarantees correct output logic state (active-low when below threshold) even at VCC = 1.0V. This makes it suitable for deep-discharge monitoring in single-cell Li+ or NiMH battery systems where voltage drops below 1.8V.
What is the maximum transient duration the MAX6377UR30-T can ignore on the VCC line?
The MAX6377UR30-T suppresses output pulses for VCC transients up to 200µs in duration when the overdrive (VTH – VCC) is 100mV, as shown in Figure MAX6375-04 of the datasheet. Shorter transients are rejected at larger overdrives; for example, at 200mV overdrive, the maximum tolerable pulse width drops to ~100µs.
Is the MAX6377UR30-T available in lead-free packaging?
Yes, the MAX6377UR30-T is available in lead-free packaging. To order the RoHS-compliant version, replace the "-T" suffix with "+T", resulting in MAX6377UR30+T. Both versions use the same SOT23-3 package and share identical electrical specifications and thermal performance.
MAX6377UR30-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- 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
MAX6377UR30-T FAQ
1.How can I place an order for MAX6377UR30-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377UR30-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 MAX6377UR30-T reliable?
The price and inventory of MAX6377UR30-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377UR30-T is usually 5 days.
3.What payment methods are accepted for MAX6377UR30-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377UR30-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377UR30-T?
MAX6377UR30-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377UR30-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 MAX6377UR30-T?
For technical support, including MAX6377UR30-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377UR30-T requirements.
6.How does Aetrix verify that MAX6377UR30-T is sourced from the original manufacturer or authorized distributors?
All MAX6377UR30-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 MAX6377UR30-T meets industry standards.
7.What is the process for return or replacement of MAX6377UR30-T?
All MAX6377UR30-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377UR30-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 MAX6377UR30-T part is unused and in its original packaging.
Return procedure for MAX6377UR30-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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