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Analog Devices Inc./Maxim Integrated MAX6386XS46D3+T
- Part No.:
- MAX6386XS46D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6386XS46D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,589
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Product details
Overview
MAX6386XS46D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 4.63V reset threshold (±2.5% over -40°C to +125°C), and 140ms minimum VCC reset timeout. It features a debounced manual reset input (MR) with internal 63kΩ pullup and operates down to VCC = 1.0V - used in portable equipment, dual-voltage systems, and critical μP power monitoring.
For engineers reviewing the MAX6386XS46D3+T datasheet, MAX6386XS46D3+T pinout, MAX6386XS46D3+T application, or MAX6386XS46D3+T equivalent, key selection criteria include reset threshold accuracy, MR timing compatibility, open-drain drive capability (3.2mA sink at 4.5V), supply current (3μA at 1.8V), and SC70-4 package footprint constraints.
Technical Context
The MAX6386XS46D3+T implements a precision bandgap-based voltage comparator for VCC monitoring against a fixed 4.63V threshold, with ±2.5% tolerance across -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a guaranteed-minimum 140ms reset assertion after VCC recovers above threshold.
It integrates a debounced manual reset input (MR) with 1µs minimum pulse width support and 100ns glitch rejection; MR asserts reset actively low and holds it for the full 140ms timeout after release. The open-drain RESET output requires an external pullup and guarantees valid logic state down to VCC = 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection in 5V systems |
| Reset Timeout | 140ms minimum - provides sufficient hold time for μP initialization and peripheral stabilization |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable and energy-sensitive applications |
| Output Type | Open-drain active-low - supports wired-OR reset buses and level translation across voltage domains |
| Manual Reset (MR) | Active-low with 63kΩ internal pullup - eliminates external components for basic pushbutton reset functionality |
| Operating Voltage | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
| VOL (RESET) | 0.4V max at 3.2mA sink (VCC ≥ 4.5V) - ensures solid logic-low under heavy bus loading |
Pinout & Package
MAX6386XS46D3+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. This compact footprint supports high-density PCB layouts in space-constrained portable and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers device and triggers reset when falling below 4.63V |
| 2 | RESET | Open-drain active-low reset output - requires external pullup; sinks up to 3.2mA to assert reset |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC; drives reset low when grounded |
| 4 | GND | Ground reference for all internal circuitry and reset comparator - must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±2.5% accuracy over full temperature range - eliminates external resistor networks and calibration |
| Debounced manual reset input | 1µs minimum MR pulse width and 100ns glitch rejection - prevents spurious resets from switch bounce or EMI |
| Ultra-low quiescent current | 3μA at 1.8V - reduces standby power in always-on battery-backed systems without compromising supervision integrity |
| Valid reset output down to VCC = 1.0V | Guaranteed logic state integrity during deep undervoltage - avoids undefined μP behavior during catastrophic brownout |
| Negative-going VCC transient immunity | Rejects sub-100µs glitches below threshold - enhances reliability in electrically noisy environments (e.g., motor drives, switching supplies) |
Applications
| Portable Medical Monitor | Dual-Rail Industrial PLC |
|---|---|
|
Use Scenario: Battery-powered handheld vital-signs monitor with separate 3.3V logic and 5V sensor rails. IC Role / Device Role / Timing Role: Supervises 5V rail using factory-set 4.63V threshold; asserts open-drain RESET to both μP and analog front-end upon undervoltage. Use Value: 140ms timeout ensures complete ADC calibration and display initialization before firmware execution resumes. |
Use Scenario: Programmable logic controller with independent 24V I/O and 3.3V core power domains. IC Role / Device Role / Timing Role: Monitors 3.3V core rail; MR pin tied to service-mode button for field technician-initiated reboot without power cycle. Use Value: Internal 63kΩ MR pullup eliminates BOM cost and layout area for external resistor; open-drain output interfaces cleanly with 24V-tolerant reset bus. |
| Energy-Harvesting Sensor Node | Automotive Body Control Module |
|
Use Scenario: Solar-charged IoT node operating intermittently on supercapacitor storage, with VCC dipping below 2.0V between harvest cycles. IC Role / Device Role / Timing Role: Provides valid reset signal down to VCC = 1.0V, ensuring μP remains held in reset until stable >4.63V is established. Use Value: 3μA supply current extends usable runtime between energy harvest events; no external components required for basic supervision. |
Use Scenario: 12V automotive subsystem with local 5V LDO powering MCU and CAN transceiver. IC Role / Device Role / Timing Role: Supervises 5V rail; RESET output pulled up to 5V and shared with CAN transceiver's reset pin for synchronized recovery. Use Value: ±2.5% threshold accuracy over -40°C to +125°C ensures consistent brownout response across engine bay thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR46D3+T | Same 4.63V threshold and 140ms timeout, but push-pull active-low output - no external pullup required | Suitable where board-level reset bus uses dedicated trace (no wired-OR), and VCC ≥ 1.8V is guaranteed | Select when eliminating external pullup resistor simplifies layout and reduces component count |
| TPS3808G33DBVR | 3.3V fixed threshold (not 4.63V); 200ms timeout; 1.8–6.0V operation; push-pull active-low output | Designed for 3.3V systems only; lacks MR input; higher 8μA typical supply current at 1.8V | Choose only if system operates at 3.3V and MR functionality is unnecessary; verify threshold match is acceptable |
Compared with MAX6386XS46D3+T, MAX6326XR46D3+T removes pullup dependency but loses bus-sharing flexibility, while TPS3808G33DBVR offers different threshold and no MR - making MAX6386XS46D3+T uniquely suited for 5V-system manual-reset applications requiring open-drain interoperability.
Availability
MAX6386XS46D3+T is available at Aetrix Electronics and suitable for portable medical monitors, dual-rail industrial PLCs, energy-harvesting sensor nodes, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6386XS46D3+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 ultra-low-power, high-accuracy voltage supervision for microprocessor-based systems where reliability, small size, and wide temperature operation are critical.
FAQ
What is the exact reset threshold voltage of MAX6386XS46D3+T and how stable is it over temperature?
The MAX6386XS46D3+T has a factory-set nominal reset threshold of 4.63V, with guaranteed accuracy of ±2.5% over the full operating range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning threshold drift is tightly bounded and predictable - critical for robust brownout protection in automotive and industrial environments where ambient temperature swings are extreme.
Does MAX6386XS46D3+T require an external pullup resistor on the RESET pin?
Yes, MAX6386XS46D3+T features an open-drain active-low RESET output, so an external pullup resistor is mandatory to establish a defined high state when reset is not asserted. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements; the device itself does not provide internal pullup on RESET.
What is the function and electrical behavior of the MR pin on MAX6386XS46D3+T?
The MR (manual reset) pin on MAX6386XS46D3+T is an active-low input with an internal 63kΩ pullup resistor to VCC. Driving MR low forces reset assertion regardless of VCC level, and reset remains active for the full 140ms timeout after MR is released. It accepts TTL/CMOS logic levels and supports direct connection to momentary switches without external debounce circuitry.
Can MAX6386XS46D3+T operate reliably when VCC drops below 1.8V?
Yes, MAX6386XS46D3+T is fully specified down to VCC = 1.0V. Its reset output remains logically valid (guaranteed low/high state) even at 1.0V, and supply current drops to just 3μA at 1.8V - enabling use in ultra-low-power applications such as energy-harvesting nodes or backup-supply monitoring where VCC may dip significantly during brownout conditions.
Is MAX6386XS46D3+T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6386XS46D3+T is explicitly pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX6326–MAX6348 series per the datasheet's feature list. This allows drop-in replacement in existing SC70-4 layouts without PCB revision, preserving design investment while upgrading to lower current, tighter threshold accuracy, and integrated MR functionality.
MAX6386XS46D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6386XS46D3+T FAQ
1.How can I place an order for MAX6386XS46D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386XS46D3+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 MAX6386XS46D3+T reliable?
The price and inventory of MAX6386XS46D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386XS46D3+T is usually 5 days.
3.What payment methods are accepted for MAX6386XS46D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386XS46D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386XS46D3+T?
MAX6386XS46D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386XS46D3+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 MAX6386XS46D3+T?
For technical support, including MAX6386XS46D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386XS46D3+T requirements.
6.How does Aetrix verify that MAX6386XS46D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6386XS46D3+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 MAX6386XS46D3+T meets industry standards.
7.What is the process for return or replacement of MAX6386XS46D3+T?
All MAX6386XS46D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386XS46D3+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 MAX6386XS46D3+T part is unused and in its original packaging.
Return procedure for MAX6386XS46D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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