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Analog Devices Inc./Maxim Integrated MAX6386XS26D7
- Part No.:
- MAX6386XS26D7
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6386XS26D7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,745
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Product details
Overview
The MAX6386XS26D7 from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.63V reset threshold (±2.5% over -40°C to +125°C), 1200ms minimum VCC reset timeout, and debounced manual reset input. It monitors single-supply systems in portable electronics, battery-powered instrumentation, and industrial controllers where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6386XS26D7 datasheet, MAX6386XS26D7 pinout, MAX6386XS26D7 application, or MAX6386XS26D7 equivalent, key selection considerations include its 2.63V threshold accuracy, 1200ms timeout, SC70-4 package footprint, manual reset functionality with internal 63kΩ pullup, and guaranteed reset validity down to VCC = 1V.
Technical Context
This device implements a precision voltage comparator with ±2.5% threshold accuracy across -40°C to +125°C, paired with a temperature-stable monostable timer for reset assertion. The open-drain RESET output requires an external pullup and remains asserted for ≥1200ms after VCC rises above 2.63V.
The debounced manual reset input (MR) features an internal 63kΩ pullup to VCC, accepts TTL/CMOS logic levels, and asserts reset for ≥1200ms after MR release-enabling robust operator-initiated resets without external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (factory-set, ±2.5% over full temp range) |
| VCC Reset Timeout | 1200ms min - ensures µP initialization completes before release |
| Supply Current | 3µA at +1.8V - enables multi-year battery life in always-on sensors |
| Operating Voltage | 1.0V to 5.5V - supports operation during deep brownout recovery |
| Reset Output Type | Open-drain active-low - allows wired-OR reset bus sharing |
| MR Pullup Resistance | 63kΩ - eliminates need for external pullup on manual reset line |
| Temp Range | -40°C to +125°C - qualified for automotive under-hood and industrial control use |
Pinout & Package
MAX6386XS26D7 is housed in a 4-pin SC70 package (package code X4-1), measuring 1.0mm × 1.0mm × 0.5mm, with wettable flanks for automated optical inspection. Pin 1 = VCC, Pin 2 = RESET, Pin 3 = MR, Pin 4 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and sets fixed reset threshold |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; asserts low during VCC < 2.63V or MR low |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ; debounced by internal logic |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±2.5% tolerance over -40°C to +125°C - eliminates external resistor divider calibration |
| Guaranteed reset validity | Operates correctly down to VCC = 1.0V - ensures deterministic reset state during deep undervoltage events |
| Debounced manual reset | Internal MR filtering removes switch bounce and EMI transients - no external capacitor required |
| Negative-going transient immunity | Rejects VCC glitches ≤100µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Low quiescent current | 3µA at 1.8V - extends battery life in IoT edge nodes and wearables |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitor with ultra-low-power MCU that must initialize reliably after coin-cell replacement or deep discharge. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset until VCC stabilizes above 2.63V for ≥1200ms, then releasing µP from reset. Use Value: Prevents firmware corruption during marginal power-up by enforcing minimum 1200ms hold time, while 3µA supply current enables >5-year shelf life. | Use Scenario: DIN-rail mounted programmable logic controller with isolated I/O channels requiring fail-safe restart after AC mains interruption. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail; asserts open-drain RESET to all microcontrollers and FPGAs simultaneously upon brownout. Use Value: Open-drain output enables shared reset bus across multiple ICs; 1200ms timeout ensures complete FPGA configuration before release. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Under-hood body control module powered from vehicle battery subject to cranking dips below 6V and load dump spikes. IC Role / Device Role / Timing Role: Resets microcontroller when 5V supply drops below 2.63V; MR pin connects to diagnostic button for field technician reset. Use Value: Internal 63kΩ MR pullup eliminates discrete component; -40°C to +125°C rating ensures operation in extreme ambient conditions. | Use Scenario: Revenue-grade electricity meter with dual-supply architecture (main AC-derived and backup supercapacitor). IC Role / Device Role / Timing Role: Monitors 3.3V backup rail; asserts reset if supercapacitor voltage decays below 2.63V during extended outage. Use Value: 2.63V threshold matches typical supercapacitor end-of-discharge voltage; 1200ms timeout prevents nuisance resets during brief voltage sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR26D3+ | Same 2.63V threshold and SC70-3 package, but push-pull active-low output and no MR input | Lacks manual reset capability; requires external pullup for reset bus sharing | Select when MR functionality is unnecessary and board space is constrained (3-pin vs. 4-pin) |
| TPS3126E18DBVR | 2.64V threshold, 1200ms timeout, SOT-23-5 package, includes watchdog timer | Additional watchdog function increases complexity; larger footprint than SC70-4 | Select when system-level watchdog supervision is required alongside power monitoring |
Compared with MAX6326XR26D3+, the MAX6386XS26D7 adds essential manual reset capability in the same compact SC70 footprint; versus TPS3126E18DBVR, it offers simpler integration without watchdog overhead while maintaining identical timing and threshold performance.
Availability
MAX6386XS26D7 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 product lifecycles.
Supply support for MAX6386XS26D7 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 power, sensing, and connectivity applications in industrial, automotive, and computing markets.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-critical and harsh-environment systems, with variants optimized for single/dual supply monitoring, manual reset, and auxiliary voltage detection.
FAQ
What is the exact reset threshold voltage of the MAX6386XS26D7?
The MAX6386XS26D7 has a factory-set reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and does not require external calibration. The '26' suffix in MAX6386XS26D7 explicitly denotes the 2.63V threshold per Maxim's ordering nomenclature.
Does the MAX6386XS26D7 support manual reset, and how is it implemented?
Yes, the MAX6386XS26D7 includes a debounced manual reset input (MR) on pin 3. It features an internal 63kΩ pullup resistor to VCC, so the pin can be left unconnected when unused. Driving MR low forces reset assertion for ≥1200ms after release. No external debounce components are needed, making MAX6386XS26D7 ideal for space-constrained designs requiring field-serviceable reset capability.
What package type and dimensions does the MAX6386XS26D7 use?
The MAX6386XS26D7 uses a 4-pin SC70 package (package code X4-1), measuring 1.0mm × 1.0mm × 0.5mm with wettable flanks. Its pinout is VCC (pin 1), RESET (pin 2), MR (pin 3), and GND (pin 4). This ultra-small footprint provides PCB area savings over SOT-23 alternatives while maintaining compatibility with standard reflow processes.
How long does the reset signal remain asserted after VCC recovers above threshold?
The MAX6386XS26D7 guarantees a minimum reset timeout period of 1200ms after VCC rises above the 2.63V threshold. This is specified as 'D7' in the part number suffix and is temperature-stable across -40°C to +125°C. The actual timeout may extend up to 2400ms per datasheet limits, ensuring robust µP initialization even under worst-case process/voltage/temperature corners.
Can the MAX6386XS26D7 operate with supply voltages below 1.8V?
Yes, the MAX6386XS26D7 operates from 1.0V to 5.5V and guarantees correct reset output logic states down to VCC = 1.0V. At 1.0V, supply current is ~4µA, and the open-drain RESET output maintains valid low-state sinking capability (VOL ≤ 0.3V at 80µA sink). This enables reliable operation during deep brownout recovery scenarios where other supervisors fail.
MAX6386XS26D7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6386XS26D7 FAQ
1.How can I place an order for MAX6386XS26D7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386XS26D7 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 MAX6386XS26D7 reliable?
The price and inventory of MAX6386XS26D7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386XS26D7 is usually 5 days.
3.What payment methods are accepted for MAX6386XS26D7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386XS26D7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386XS26D7?
MAX6386XS26D7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386XS26D7 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 MAX6386XS26D7?
For technical support, including MAX6386XS26D7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386XS26D7 requirements.
6.How does Aetrix verify that MAX6386XS26D7 is sourced from the original manufacturer or authorized distributors?
All MAX6386XS26D7 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 MAX6386XS26D7 meets industry standards.
7.What is the process for return or replacement of MAX6386XS26D7?
All MAX6386XS26D7 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386XS26D7, 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 MAX6386XS26D7 part is unused and in its original packaging.
Return procedure for MAX6386XS26D7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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