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Analog Devices Inc./Maxim Integrated MAX6377UR23
- Part No.:
- MAX6377UR23
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6377UR23.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:939
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Product details
Overview
MAX6377UR23 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 2.32V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to 1V VCC. It asserts a logic-low output when supply voltage falls below threshold and is used in precision brown-out detection for microcontroller reset circuits.
For engineers reviewing the MAX6377UR23 datasheet, MAX6377UR23 pinout, MAX6377UR23 application, or MAX6377UR23 equivalent, key selection criteria include its 2.32V trip point, open-drain output architecture requiring external pull-up, immunity to sub-20µs VCC transients, and compatibility with 1.2V–5.5V supply domains in space-constrained SOT23-3 designs.
Technical Context
The MAX6377UR23 implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.32V threshold-no external components required. Its open-drain output sinks current only when asserted (VCC < VTH), enabling flexible interfacing with logic supplies up to 5.5V via external pull-up.
It operates across -40°C to +85°C with ±2.5% threshold accuracy, 40ppm/°C tempco, and propagation delay of 6.3µs (typ) on falling VCC. The device ignores fast negative-going transients ≤20µs (at 100mV overdrive), ensuring robust reset generation in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V (factory-trimmed, ±2.5% over -40°C to +85°C) - sets precise brown-out detection point for 2.4V nominal Li-ion or 2.5V logic rails. |
| Supply Current | 500nA at +25°C - enables multi-year battery life in coin-cell-powered IoT sensors and wearables. |
| Output Type | Active-low open-drain - requires external pull-up; supports wired-OR reset buses and mixed-voltage system interfacing. |
| VCC Operating Range | 1.2V to 5.5V - functions during deep brown-out (down to 1V output state guaranteed) and interfaces with wide-input DC/DC converters. |
| Propagation Delay | 6.3µs (typ, falling edge) - ensures timely reset assertion before microcontroller corruption during rapid supply collapse. |
| Threshold Hysteresis | 100mV - prevents chatter during slow or noisy supply recovery near trip point. |
| Transient Immunity | Rejects VCC glitches ≤20µs duration (at 100mV overdrive) - eliminates false resets from switching noise or load transients. |
Pinout & Package
MAX6377UR23 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 1 = GND, Pin 2 = OUT (open-drain), 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 | Open-drain active-low output; sinks up to 100µA (leakage) or 1.6mA (asserted); requires external pull-up resistor to logic rail. |
| 3 | VCC | Supply input (1.2V–5.5V); powers internal circuitry and defines monitored voltage domain; decoupling capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA supply current enables >10-year battery life in always-on monitoring applications with CR2032 cells. |
| No external components | Internally trimmed threshold eliminates calibration resistors and reduces BOM count and PCB area in compact wearable designs. |
| Guaranteed 1V operation | Valid output state maintained down to 1V VCC, supporting reliable reset assertion during deep discharge of single-cell Li-ion batteries. |
| Open-drain flexibility | Allows shared reset bus with multiple devices and level-shifting across 1.8V, 3.3V, and 5V logic domains using appropriate pull-up voltage. |
| Transient immunity | Rejects short-duration supply glitches without additional RC filtering, simplifying power integrity design in noisy DC/DC environments. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable shutdown before battery voltage drops below MCU operational minimum. IC Role / Device Role / Timing Role: Brown-out detector asserting active-low reset to halt processor and preserve sensor calibration data prior to undervoltage lockout. Use Value: 500nA quiescent current extends usable battery life by >30% versus µA-range alternatives; 2.32V threshold aligns precisely with 2.4V cutoff for LiMnO₂ chemistry. |
Use Scenario: Remote environmental logger using solar-charged LiFePO₄ battery, operating intermittently in extreme temperatures (-40°C to +85°C). IC Role / Device Role / Timing Role: System supervisor monitoring regulated 3.3V rail derived from buck converter; triggers hardware reset on sustained undervoltage events. Use Value: ±2.5% threshold accuracy over full temperature range ensures consistent reset behavior without software compensation; SOT23-3 footprint minimizes board area in sealed enclosures. |
| Smart Wearable Controllers | Low-Power IoT Edge Nodes |
|
Use Scenario: Fitness tracker with BLE SoC and analog front-end, where supply collapse during RF transmission must not corrupt flash memory writes. IC Role / Device Role / Timing Role: Dedicated voltage monitor feeding dedicated reset pin on ARM Cortex-M0+ MCU to enforce clean restart before write operations. Use Value: 6.3µs propagation delay guarantees reset assertion within one CPU clock cycle at 16MHz; open-drain output allows direct connection to SoC's active-low nRESET with no level shifter. |
Use Scenario: NB-IoT node deployed in utility metering, sleeping for 15 minutes between transmissions, powered by primary lithium thionyl chloride cell. IC Role / Device Role / Timing Role: Primary brown-out protection element ensuring MCU remains held in reset until VCC rises above 2.32V + 100mV hysteresis after cold start. Use Value: 100mV hysteresis prevents oscillatory reset during slow battery recovery; 1.2V–5.5V VCC range accommodates wide input from energy-harvesting PMIC outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB23DBZR | 2.33V threshold, 350nA ICC, SOT23-3, push-pull active-low output | Push-pull eliminates need for external pull-up but lacks wired-OR capability; lower ICC marginally improves battery life | Choose when system uses single-reset-rail architecture and board space permits minor layout change for pull-up removal |
| APX803S-23SA-7 | 2.32V threshold, 800nA ICC, SOT23-3, open-drain active-low output | Higher supply current reduces battery lifetime in multi-year deployments; identical pinout and interface behavior | Acceptable for cost-sensitive industrial applications where 500nA vs. 800nA has negligible impact on maintenance cycle |
Compared with MAX6377UR23, TLV803EB23DBZR offers lower ICC but sacrifices open-drain flexibility, while APX803S-23SA-7 matches pinout and function but trades 300nA extra quiescent current-making MAX6377UR23 optimal for ultra-long-life, multi-rail, or space-constrained designs demanding both precision and interface versatility.
Availability
MAX6377UR23 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, smart wearable controllers, and low-power IoT edge nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6377UR23 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 high-performance analog and mixed-signal ICs for power management, sensing, and interface applications, with emphasis on reliability and integration in harsh environments.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in battery-critical systems, delivering precision thresholds, nanoscale supply current, and transient-hardened operation in minimal 3-pin packages.
FAQ
What is the exact factory-trimmed threshold voltage of MAX6377UR23?
The MAX6377UR23 has a nominal reset threshold voltage of 2.32V, with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is laser-trimmed at wafer test and confirmed in Table 1 of the official datasheet; it is not adjustable and requires no external calibration components.
Does MAX6377UR23 require an external pull-up resistor on its OUT pin?
Yes, MAX6377UR23 features an open-drain active-low output and requires an external pull-up resistor connected between the OUT pin and a logic supply (up to 5.5V). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements; the datasheet specifies maximum sink current of 1.6mA when asserted.
Can MAX6377UR23 operate reliably below 1.2V VCC?
MAX6377UR23 is guaranteed to maintain correct output logic state (active-low when VCC < VTH) down to 1V VCC, though its specified operating range begins at 1.2V. Below 1.2V, functionality is not characterized-designers should ensure system reset occurs before VCC drops below 1.2V to guarantee deterministic behavior per datasheet specifications.
What is the maximum allowable VCC transient duration that MAX6377UR23 will ignore?
At a 100mV overdrive (i.e., VCC = VTH − 100mV = 2.22V), MAX6377UR23 rejects transients up to 20µs in duration, as shown in Figure MAX6375-04 of the datasheet. Shorter transients or smaller amplitudes are rejected more robustly; longer or deeper dips may trigger false reset assertions.
Is MAX6377UR23 pin-compatible with other members of the MAX6375–MAX6380 family in SOT23-3?
Yes, all MAX6375–MAX6380 variants in SOT23-3 (e.g., MAX6377UR22, MAX6377UR24, MAX6378UR33) share identical pinout: Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC. This allows direct substitution within the same package type when adjusting threshold voltage, provided the output configuration (open-drain here) matches system requirements.
MAX6377UR23 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:
- 2.32V
- 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
MAX6377UR23 FAQ
1.How can I place an order for MAX6377UR23 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377UR23 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 MAX6377UR23 reliable?
The price and inventory of MAX6377UR23 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377UR23 is usually 5 days.
3.What payment methods are accepted for MAX6377UR23?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377UR23 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377UR23?
MAX6377UR23 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377UR23 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 MAX6377UR23?
For technical support, including MAX6377UR23 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377UR23 requirements.
6.How does Aetrix verify that MAX6377UR23 is sourced from the original manufacturer or authorized distributors?
All MAX6377UR23 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 MAX6377UR23 meets industry standards.
7.What is the process for return or replacement of MAX6377UR23?
All MAX6377UR23 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377UR23, 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 MAX6377UR23 part is unused and in its original packaging.
Return procedure for MAX6377UR23:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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