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Analog Devices Inc./Maxim Integrated MAX6386XS44D3+T
- Part No.:
- MAX6386XS44D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6386XS44D3+T.pdf
- Description:
- IC MPU/RESET CIRC 4.38V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,781
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Product details
Overview
MAX6386XS44D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 4.38V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and debounced manual reset input (MR). It monitors single supply voltage in battery-powered controllers and portable instrumentation where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6386XS44D3+T datasheet, MAX6386XS44D3+T pinout, MAX6386XS44D3+T application, or MAX6386XS44D3+T equivalent, key selection factors include its 4-pin SC70 package, 3μA supply current at 1.8V, guaranteed reset validity down to VCC = 1V, and compatibility with dual-voltage systems requiring auxiliary monitoring support via external resistor dividers.
Technical Context
The MAX6386XS44D3+T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 140ms minimum reset assertion period after VCC recovers above 4.38V.
It features a debounced manual reset input (MR) with 63kΩ internal pullup, supporting TTL/CMOS logic drive and requiring no external debounce circuitry. The open-drain RESET output requires an external pullup and sinks up to 3.2mA at VCC ≥ 4.5V while maintaining VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V nominal (4.27V–4.48V range), factory-trimmed for stable brownout detection in 3.3V/5V systems |
| Reset Timeout | 140ms minimum, ensures μP initialization completes before code execution resumes |
| Supply Current | 3μA at +1.8V, enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | 1.0V to 5.5V, guarantees valid reset state even during deep brownout down to 1V |
| Output Type | Open-drain active-low RESET, supports wired-OR configuration and level translation |
| Manual Reset | MR input with 63kΩ internal pullup, accepts momentary switch to GND without external components |
| Temp Range | -40°C to +125°C, qualified for automotive and industrial under-hood applications |
Pinout & Package
MAX6386XS44D3+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, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and reset comparator |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; asserts low during fault or MR activation |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; initiates reset when driven below 0.3×VCC |
| 4 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set reset threshold | 4.38V with ±2.5% tolerance over full temperature range eliminates external resistor calibration |
| Low quiescent current | 3μA at 1.8V enables >10-year battery life in always-on monitoring nodes |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1V, preventing spurious release during brownout recovery |
| Debounced MR input | Internal 63kΩ pullup and 100ns glitch rejection eliminate need for RC filters or firmware debounce |
| Negative-going transient immunity | Withstands VCC glitches ≤35µs at 100mV overdrive, reducing false resets in noisy power environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG monitor powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output; asserts RESET during battery voltage sag below 4.38V and on button-press. Use Value: Prevents corrupted data logging during brownout and enables user-initiated recalibration without host MCU intervention. |
Use Scenario: DIN-rail mounted analog input module operating in factory floor environment with 24VDC supply and local 5V regulation. IC Role / Device Role / Timing Role: Monitors 5V rail for undervoltage; provides 140ms reset hold-off to ensure FPGA configuration stability after power recovery. Use Value: Eliminates boot failures caused by slow-rising 5V rails and meets IEC 61000-4-4 surge immunity requirements via transient-hardened design. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: Door module with LIN transceiver and microcontroller, exposed to cold-crank battery dips. IC Role / Device Role / Timing Role: Detects VCC drop below 4.38V during cranking; holds RESET asserted for 140ms after recovery to prevent partial firmware execution. Use Value: Ensures deterministic restart after 6V cold-crank events and supports AEC-Q100 Grade 2 qualification (via /V variant). |
Use Scenario: Revenue-grade meter with isolated RS-485 interface and tamper-detection circuitry. IC Role / Device Role / Timing Role: Resets metrology SoC when 3.3V supply falls due to capacitor discharge during AC mains interruption. Use Value: Guarantees clean restart of measurement engine after >200ms outage, preserving time-of-use billing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR43D3+T | Same 4-pin SC70 package and 4.30V reset threshold, but push-pull active-low output (no external pullup required) | Lacks manual reset input (MR); unsuitable where field-service reset is needed | Select when board layout prohibits external pullup or MR functionality is unnecessary |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.6μA typical ICC at 3.3V; SOT-23-5 package with enable input | Includes EN pin for system-level power sequencing control; no MR input | Prefer for ultra-low-power applications where 3.3V rail supervision suffices and enable gating is required |
Compared with MAX6386XS44D3+T, MAX6326XR43D3+T simplifies BOM by eliminating the pullup resistor but removes manual reset capability, while TPS3808G33DBVR reduces current consumption by 47% at 3.3V yet trades off flexibility in threshold selection and MR support.
Availability
MAX6386XS44D3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6386XS44D3+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 low power, high reliability, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits targeting battery-powered and harsh-environment systems where deterministic reset behavior and minimal quiescent current are essential.
FAQ
What is the exact reset threshold voltage of MAX6386XS44D3+T and how tightly is it specified?
The MAX6386XS44D3+T has a nominal reset threshold of 4.38V, with a guaranteed range of 4.27V to 4.48V at +25°C and ±2.5% tolerance over -40°C to +125°C. This corresponds to the "44" suffix per Maxim's Reset Threshold table and ensures robust operation in 5V systems experiencing supply variation or temperature drift.
Does MAX6386XS44D3+T support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6386XS44D3+T includes a debounced manual reset input (MR) with a 63kΩ internal pullup to VCC. To assert reset, MR must be driven below 0.3×VCC (e.g., <1.0V at 3.3V supply); the input rejects glitches <100ns and requires no external components for basic switch operation.
What is the minimum reset timeout period for MAX6386XS44D3+T, and how is it guaranteed?
The MAX6386XS44D3+T provides a minimum reset timeout of 140ms after VCC rises above the 4.38V threshold. This value is production-tested and guaranteed over temperature; the actual timeout may extend up to 280ms per datasheet limits, ensuring sufficient hold-off for slow-starting microcontrollers.
Can MAX6386XS44D3+T operate reliably at very low supply voltages, and down to what VCC level does RESET remain valid?
Yes, MAX6386XS44D3+T operates from 1.0V to 5.5V and guarantees correct RESET logic state down to VCC = 1.0V. Below this, the open-drain output cannot sink current, so external pullup ensures defined high state - unlike push-pull variants, it does not require pulldown resistors for VCC = 0V operation.
What package type and footprint does MAX6386XS44D3+T use, and are land patterns available?
MAX6386XS44D3+T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm. Official land patterns and soldering guidelines are published by Maxim Integrated at maximintegrated.com/packages and comply with JEDEC JESD51-7 thermal standards for multilayer PCBs.
MAX6386XS44D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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
MAX6386XS44D3+T FAQ
1.How can I place an order for MAX6386XS44D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386XS44D3+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 MAX6386XS44D3+T reliable?
The price and inventory of MAX6386XS44D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386XS44D3+T is usually 5 days.
3.What payment methods are accepted for MAX6386XS44D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386XS44D3+T transactions.
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4.How is shipping managed for MAX6386XS44D3+T?
MAX6386XS44D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386XS44D3+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 MAX6386XS44D3+T?
For technical support, including MAX6386XS44D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386XS44D3+T requirements.
6.How does Aetrix verify that MAX6386XS44D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6386XS44D3+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 MAX6386XS44D3+T meets industry standards.
7.What is the process for return or replacement of MAX6386XS44D3+T?
All MAX6386XS44D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386XS44D3+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 MAX6386XS44D3+T part is unused and in its original packaging.
Return procedure for MAX6386XS44D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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