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Analog Devices Inc./Maxim Integrated MAX6386XS29D2+T
- Part No.:
- MAX6386XS29D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6386XS29D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,074
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Product details
Overview
MAX6386XS29D2+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.93V reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, and debounced manual reset input (MR) featuring 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 MAX6386XS29D2+T datasheet, MAX6386XS29D2+T pinout, MAX6386XS29D2+T application, or MAX6386XS29D2+T equivalent, key selection criteria include its 2.93V VTH accuracy, 20ms VCC reset timeout, MR input compatibility with TTL/CMOS logic, guaranteed RESET validity down to VCC = 1V, and 4-pin SC70 package footprint for space-constrained designs.
Technical Context
The MAX6386XS29D2+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 20ms reset assertion window after VCC recovers above 2.93V or after MR release.
It features an open-drain RESET output requiring external pullup, a debounced MR input with 1µs minimum pulse width and 100ns glitch rejection, and operates with only 3µA supply current at 1.8V - enabling use in ultra-low-power portable applications where supply stability and reset integrity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (nominal), ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive and industrial temperature ranges |
| Reset Timeout | 20ms (min) - guarantees sufficient μP initialization time after power recovery or manual reset release |
| Supply Current | 3µA at 1.8V - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup while supporting direct switch-to-GND connection |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration and level translation with external pullup to any compatible rail |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1V VCC |
| MR Glitch Rejection | 100ns - suppresses noise-induced false resets in electrically noisy environments |
Pinout & Package
MAX6386XS29D2+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 high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers device and serves as reset threshold reference |
| 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; drives reset when pulled to GND |
| 4 | GND | Analog/digital ground reference - must be connected directly to system ground plane for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Debounced manual reset input | Integrated 63kΩ pullup and 100ns glitch rejection - enables direct pushbutton interface without external RC or logic |
| Ultra-low quiescent current | 3µA at 1.8V - extends battery life in always-on monitoring devices and energy-harvesting systems |
| Valid reset down to 1V VCC | Guaranteed RESET logic state integrity even during severe brownout - prevents μP runaway before full power recovery |
| Negative-going transient immunity | Immune to VCC glitches ≤100µs at 100mV overdrive - improves reliability in switching-noise–prone power domains |
Applications
| Industrial PLC I/O Module | Medical Wearable Sensor Node |
|---|---|
Use Scenario: Monitors 3.3V I/O supply in programmable logic controller modules exposed to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, brownout detection, and operator-initiated reset via front-panel button. Use Value: Ensures deterministic μP startup and prevents corrupted register writes during unstable supply conditions, meeting IEC 61000-4-4 immunity requirements. | Use Scenario: Powers on/off sequence control and supply monitoring in compact ECG patch with CR2032 battery and low-dropout regulators. IC Role / Device Role / Timing Role: Single-supply supervisor asserting active-low reset to ARM Cortex-M0+ MCU during battery insertion and voltage sag. Use Value: 20ms timeout aligns with MCU boot ROM initialization timing; 3µA ICC minimizes standby drain, extending operational life beyond 12 months. |
| Automotive Body Control Unit | Smart Home Hub Power Management |
Use Scenario: Embedded in 12V-to-3.3V power tree of door module, monitoring post-regulator rail under cold-crank (-40°C) and load-dump conditions. IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisor (via /V variant) detecting undervoltage on microcontroller supply and triggering safe shutdown. Use Value: ±2.5% VTH accuracy over -40°C to +125°C ensures consistent trip point across extreme automotive thermal cycles. | Use Scenario: Manages reset sequencing for dual-rail SoC (core 1.1V, I/O 3.3V) in always-connected Wi-Fi gateway with USB-C PD input. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V I/O domain, coordinating with secondary supervisor on core rail via shared RESET line. Use Value: Open-drain RESET enables wired-OR with other supervisors; 2.93V threshold matches typical 3.3V LDO dropout margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR29D2+T | Same 2.93V threshold and 20ms timeout, but push-pull active-low RESET output - no external pullup required | Lacks MR input; not suitable for designs requiring manual reset capability | Select when board layout prohibits external pullup or when MR functionality is unnecessary |
| TPS3808G33DBVR | 2.93V threshold (±0.5%), 20ms timeout, push-pull active-low RESET, 1.8V–6.5V VCC range, 1.5µA ICC at 3.3V | Higher accuracy and lower ICC, but no MR input and different pinout (SOT-23-5) | Prefer for high-precision, ultra-low-power applications where MR is unused and SOT-23-5 footprint is acceptable |
Compared with MAX6326XR29D2+T and TPS3808G33DBVR, the MAX6386XS29D2+T uniquely combines factory-trimmed 2.93V reset, 20ms timeout, open-drain RESET, and integrated MR input in a 4-pin SC70 - making it optimal for space-constrained, manually resettable systems needing flexible level translation.
Availability
MAX6386XS29D2+T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensor nodes, automotive body control units, and smart home hub power management requiring stable component supply and long-term lifecycle support.
Supply support for MAX6386XS29D2+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 MAX6381–MAX6390 family delivers low-power, factory-trimmed μP supervisory circuits targeting battery-operated, space-constrained, and thermally harsh systems requiring robust reset assurance without external components.
FAQ
What is the exact reset threshold voltage of the MAX6386XS29D2+T and how stable is it over temperature?
The MAX6386XS29D2+T has a nominal reset threshold of 2.93V, with guaranteed ±2.5% accuracy over the full operating temperature range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts less than ±0.3% across the entire range - ensuring consistent brownout detection in automotive and industrial environments where thermal stability is critical. This specification is confirmed in the Electrical Characteristics table of the official MAX6381–MAX6390 datasheet.
Does the MAX6386XS29D2+T require an external pullup resistor on its RESET pin?
Yes, the MAX6386XS29D2+T features an open-drain active-low RESET output, which requires an external pullup resistor to a valid logic-high voltage rail (e.g., 3.3V or 5V). The datasheet specifies that the RESET pin remains high-impedance when deasserted and pulls low only when reset is active. Typical pullup values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. This design enables wired-OR configurations and level-shifting flexibility not possible with push-pull outputs.
Can the MAX6386XS29D2+T be used in systems powered by a 1.8V supply?
Yes, the MAX6386XS29D2+T operates over a 1.0V to 5.5V supply range and consumes only 3µA at 1.8V, making it ideal for low-voltage battery-powered systems. Crucially, its RESET output remains logically valid down to VCC = 1V - ensuring the microprocessor receives a clean, unambiguous reset signal even during deep brownout conditions. This behavior is explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet.
What is the function and electrical specification of the MR pin on the MAX6386XS29D2+T?
The MR (Manual Reset) pin on the MAX6386XS29D2+T is an active-low input that forces a reset when pulled to GND. It features an internal 63kΩ pullup resistor to VCC, allowing direct connection of a momentary switch between MR and GND without external components. The datasheet specifies a 1µs minimum pulse width and 100ns glitch rejection, ensuring noise immunity. MR remains asserted while low and holds reset for the full 20ms timeout after release - matching the VCC reset timing for consistent system behavior.
Is the MAX6386XS29D2+T pin-compatible with older Maxim reset ICs like the MAX809?
Yes, the MAX6386XS29D2+T is pin-compatible with the MAX809, MAX810, MAX803, and several MAX63xx variants (including MAX6326/MAX6327/MAX6328) in the same 4-pin SC70 package. This compatibility is explicitly stated in the "Features" section of the datasheet. However, note that MAX6386XS29D2+T provides an open-drain RESET output and MR input, whereas MAX809 offers only push-pull active-low RESET without MR - so functional equivalence requires verifying system-level reset topology and manual reset requirements.
MAX6386XS29D2+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:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6386XS29D2+T FAQ
1.How can I place an order for MAX6386XS29D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386XS29D2+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 MAX6386XS29D2+T reliable?
The price and inventory of MAX6386XS29D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386XS29D2+T is usually 5 days.
3.What payment methods are accepted for MAX6386XS29D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386XS29D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386XS29D2+T?
MAX6386XS29D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386XS29D2+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 MAX6386XS29D2+T?
For technical support, including MAX6386XS29D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386XS29D2+T requirements.
6.How does Aetrix verify that MAX6386XS29D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6386XS29D2+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 MAX6386XS29D2+T meets industry standards.
7.What is the process for return or replacement of MAX6386XS29D2+T?
All MAX6386XS29D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386XS29D2+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 MAX6386XS29D2+T part is unused and in its original packaging.
Return procedure for MAX6386XS29D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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