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Analog Devices Inc./Maxim Integrated MAX6386XS22D3-T
- Part No.:
- MAX6386XS22D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6386XS22D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,637
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Product details
Overview
MAX6386XS22D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.19V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and debounced manual reset input (MR) with internal 63kΩ pullup. It monitors single supply voltage in battery-powered embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6386XS22D3-T datasheet, MAX6386XS22D3-T pinout, MAX6386XS22D3-T application, or MAX6386XS22D3-T equivalent, key selection criteria include its 2.19V threshold accuracy, 140ms reset timeout, MR input compatibility with TTL/CMOS logic, guaranteed reset validity down to VCC = 1V, and SC70-4 package footprint for space-constrained designs.
Technical Context
The MAX6386XS22D3-T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 2.19V threshold, with ±2.5% accuracy across -40°C to +125°C and 60ppm/°C tempco. Its internal timer asserts reset for ≥140ms after VCC rises above threshold or after MR release.
It features an open-drain RESET output requiring external pullup, a debounced MR input tolerant of noise and long traces (with optional 0.1μF capacitor to GND), and operates from 1.0V to 5.5V supply while consuming only 3μA at 1.8V. Reset assertion is immune to negative-going VCC transients up to defined overdrive/duration limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V (nominal), ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout | 140ms (min) - guarantees sufficient μP initialization time before release from reset |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | 1.0V to 5.5V - supports wide-range Li-ion, 3.3V, and 5V systems without external regulation |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup; allows direct switch-to-GND connection |
| RESET Output Type | Open-drain active-low - enables wired-OR reset bus sharing across multiple supervisors or logic families |
| Reset Validity | Guaranteed down to VCC = 1V - maintains correct logic state during deep brownout, preventing spurious releases |
Pinout & Package
MAX6386XS22D3-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; accepts 1.0V–5.5V; powers internal circuitry and reset comparator |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; sinks ≥1.2mA at VCC ≥2.5V when asserted |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ; drives reset low when pulled to GND |
| 4 | GND | Analog and digital ground reference; must be connected directly to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.19V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Debounced manual reset input | Integrated MR pin with internal 63kΩ pullup and 100ns glitch rejection - enables pushbutton reset without external RC or logic |
| Low quiescent current | 3μA at 1.8V - extends battery life in portable medical monitors and wireless sensor nodes |
| Negative transient immunity | Immune to VCC glitches ≤100mV overdrive for durations up to 35µs - prevents false resets in noisy power environments |
| Valid reset down to 1V supply | RESET output remains logically correct even as VCC collapses to 1V - ensures deterministic behavior during deep brownout |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell, requiring reliable startup and brownout recovery during battery depletion. IC Role / Device Role / Timing Role: Supervises VCC rail; asserts open-drain RESET to microcontroller until stable 3.0V is reached and held for ≥140ms. Use Value: 3μA supply current extends operational life beyond 3 years; 2.19V threshold matches LiMnO₂ discharge curve endpoint. | Use Scenario: DIN-rail mounted analog input module operating in factory floor environment with 24VDC supply and 3.3V logic rails. IC Role / Device Role / Timing Role: Monitors 3.3V logic supply; triggers system-wide reset on undervoltage; MR pin enables field technician-initiated reboot via front-panel button. Use Value: ±2.5% threshold accuracy ensures consistent trip point across -40°C to +85°C ambient; MR debounce prevents contact bounce-induced spurious resets. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Low-voltage subsystem in BCM monitoring 5V domain derived from vehicle battery, subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Provides fail-safe reset signaling to MCU during cranking (VCC dip to ~6V); open-drain output interfaces cleanly with CAN transceiver reset inputs. Use Value: Negative transient immunity up to 35µs prevents false resets during engine start; AEC-Q100 qualified variant available (not this part, but same family). | Use Scenario: Wi-Fi-connected thermostat using dual-supply architecture: 3.3V for RF SoC and 1.8V for sensor interface ASIC. IC Role / Device Role / Timing Role: Supervises primary 3.3V rail; MR pin tied to reset button; RESET output shared across SoC and ASIC via pullup to 3.3V. Use Value: Open-drain configuration allows single reset line to control multiple voltage domains; 140ms timeout satisfies ARM Cortex-M boot requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR22D3+T | Same 2.19V threshold and 140ms timeout, but push-pull active-low output; no MR input | Lacks manual reset capability; requires external pullup not needed for push-pull | Select when MR functionality is unnecessary and board layout favors push-pull drive strength |
| TPS3808G18DBVR | 2.175V threshold (±0.5%), 200ms timeout, 1.4μA typical ICC at 1.8V; includes watchdog timer | Higher accuracy and lower current, but adds watchdog function not present in MAX6386XS22D3-T | Select when tighter threshold tolerance or ultra-low power is critical, and watchdog capability is acceptable or desired |
Compared with MAX6386XS22D3-T, MAX6326XR22D3+T offers stronger drive but no manual reset, while TPS3808G18DBVR delivers superior accuracy and lower current at the cost of added complexity and non-drop-in replacement due to different pinout and feature set.
Availability
MAX6386XS22D3-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6386XS22D3-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 demanding industrial, automotive, and computing applications, emphasizing reliability, low power, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits optimized for battery-powered and space-constrained systems where accurate, low-current reset supervision is critical.
FAQ
What is the exact reset threshold voltage of the MAX6386XS22D3-T and how stable is it over temperature?
The MAX6386XS22D3-T has a factory-set nominal reset threshold of 2.19V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts less than 0.013V across the entire range. This stability is confirmed in the Electrical Characteristics table and Typical Operating Characteristics plots (toc04) of the official datasheet.
Does the MAX6386XS22D3-T require an external pullup resistor on the RESET pin?
Yes, the MAX6386XS22D3-T features an open-drain active-low RESET output, which requires an external pullup resistor to the appropriate logic rail (e.g., 3.3V or 5V). The datasheet specifies that the output sinks ≥1.2mA at VCC ≥2.5V when asserted, so the pullup value must be chosen to ensure adequate voltage level and rise time for the driven load - typically 10kΩ to 100kΩ depending on bus capacitance and speed requirements.
Can the MAX6386XS22D3-T be used in automotive applications?
The MAX6386XS22D3-T itself is not AEC-Q100 qualified, but the MAX6386XS22D3/V+T variant is automotive-grade and shares identical electrical specifications and pinout. For automotive body control or infotainment modules requiring qualification, the /V version must be specified. The base MAX6386XS22D3-T is rated for -40°C to +125°C operation and meets all functional requirements except formal automotive stress testing.
What is the function and electrical behavior of the MR pin on the MAX6386XS22D3-T?
The MR (Manual Reset) pin on the MAX6386XS22D3-T is an active-low input with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which persists for the full 140ms timeout after MR is released. It rejects glitches <100ns and tolerates TTL/CMOS logic levels. If unused, MR may be left floating (due to internal pullup) or tied to VCC; no external components are required unless enhanced noise immunity is needed (e.g., 0.1μF capacitor to GND).
How does the MAX6386XS22D3-T behave when VCC drops below 1.0V?
The MAX6386XS22D3-T guarantees correct RESET output logic state down to VCC = 1.0V, but operation ceases below that level. Below 1.0V, the internal comparator and timer stop functioning, and the open-drain RESET output transitions to high-impedance (floating), relying entirely on the external pullup resistor to hold the line high. This behavior is explicitly documented in the "Ensuring a Valid RESET Output Down to VCC = 0V" section of the datasheet, noting that open-drain outputs like those on MAX6386XS22D3-T cannot be actively driven below 1.0V.
MAX6386XS22D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.19V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6386XS22D3-T FAQ
1.How can I place an order for MAX6386XS22D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386XS22D3-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 MAX6386XS22D3-T reliable?
The price and inventory of MAX6386XS22D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386XS22D3-T is usually 5 days.
3.What payment methods are accepted for MAX6386XS22D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386XS22D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386XS22D3-T?
MAX6386XS22D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386XS22D3-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 MAX6386XS22D3-T?
For technical support, including MAX6386XS22D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386XS22D3-T requirements.
6.How does Aetrix verify that MAX6386XS22D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6386XS22D3-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 MAX6386XS22D3-T meets industry standards.
7.What is the process for return or replacement of MAX6386XS22D3-T?
All MAX6386XS22D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386XS22D3-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 MAX6386XS22D3-T part is unused and in its original packaging.
Return procedure for MAX6386XS22D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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