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Analog Devices Inc./Maxim Integrated MAX6386XS26D3-T
- Part No.:
- MAX6386XS26D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6386XS26D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
MAX6386XS26D3-T 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), 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 MAX6386XS26D3-T datasheet, MAX6386XS26D3-T pinout, MAX6386XS26D3-T application, or MAX6386XS26D3-T equivalent, key selection criteria include its 2.63V threshold accuracy, 140ms reset hold time, 3μA supply current at 1.8V, SC70-4 package footprint, and MR input compatibility with TTL/CMOS logic levels.
Technical Context
The MAX6386XS26D3-T implements a precision bandgap-based reset comparator with ±2.5% threshold tolerance across –40°C to +125°C and guarantees valid reset assertion down to VCC = 1.0V. Its internal timer enforces a minimum 140ms reset timeout after VCC rises above 2.63V.
It features a debounced manual reset input (MR) with 1µs minimum pulse width support and 100ns glitch rejection; MR asserts reset actively low and holds reset for the full 140ms timeout after release. The open-drain RESET output requires an external pullup and sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V nominal, ±2.5% over –40°C to +125°C - ensures stable trip point across automotive and industrial temperature ranges |
| Reset Timeout | 140ms minimum - provides sufficient hold time for μP initialization and memory stabilization |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Output Type | Open-drain active-low RESET - supports wired-OR configuration and level translation with external pullup |
| Manual Reset | MR input with 63kΩ internal pullup - eliminates need for external biasing; accepts TTL/CMOS logic levels |
| Operating Voltage | 1.0V to 5.5V - guarantees reset validity during deep brownout down to 1V, critical for low-voltage SoC interfaces |
| Temp Range | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6386XS26D3-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 space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers device and serves as reset trigger source |
| 2 | RESET | Open-drain active-low reset output - requires external pullup; sinks 3.2mA max at VCC ≥ 4.5V |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC; drives reset when pulled to GND |
| 4 | GND | Ground reference - must be connected directly to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±2.5% accuracy over full temperature range - eliminates external resistor divider calibration |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring nodes without sacrificing reset reliability |
| Debounced manual reset | 100ns glitch rejection and 1µs minimum MR pulse width - prevents spurious resets from switch bounce or EMI |
| Valid reset down to 1.0V VCC | Guaranteed correct logic state of RESET output even during severe brownout - ensures deterministic μP behavior |
| Negative-going transient immunity | Rejects short VCC glitches per MAX6381/90 toc07 curve - reduces false triggers in noisy power environments |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output; asserts open-drain RESET to MSP430F5xx during startup and brownout. Use Value: 3μA supply current extends battery life beyond 2 years; 140ms timeout ensures full RAM initialization before firmware execution. | Use Scenario: Door module MCU powered by 5V vehicle bus with load-dump transients. IC Role / Device Role / Timing Role: Supervises main 5V rail; MR tied to diagnostic test button; RESET drives µC reset pin via 10kΩ pullup. Use Value: ±2.5% threshold stability over –40°C to +125°C prevents false resets during thermal cycling; open-drain output isolates reset line from bus noise. |
| Industrial PLC I/O Submodules | Smart Energy Meters |
Use Scenario: DIN-rail mounted I/O expander with isolated 3.3V logic supply and 24V field-side interface. IC Role / Device Role / Timing Role: Resets STM32G0 series MCU on 3.3V rail; MR connected to service mode jumper. Use Value: Valid RESET assertion down to VCC = 1.0V ensures safe shutdown during undervoltage faults; SC70-4 footprint fits dense PCB layouts. | Use Scenario: Revenue-grade meter with dual-supply architecture (3.3V MCU, 1.8V RTC/EEPROM). IC Role / Device Role / Timing Role: Primary supervisor for 3.3V domain; MR linked to tamper-detection switch. Use Value: 140ms timeout exceeds typical EEPROM write cycle; 63kΩ MR pullup eliminates BOM cost of discrete resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR26D3+T | Same 2.63V 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 board layout prohibits external pullup or MR function is unnecessary |
| TPS3808G33DBVR | 2.93V threshold (not 2.63V); 200ms timeout; 1.8–6.0V VCC range; includes watchdog timer | Higher threshold unsuitable for 2.8V systems; watchdog adds complexity if unused | Select only if 2.93V threshold aligns with system VDD and watchdog functionality is required |
Compared with MAX6326XR26D3+T, MAX6386XS26D3-T provides essential MR functionality and open-drain flexibility at the cost of external pullup; versus TPS3808G33DBVR, it offers precise 2.63V trip point and lower quiescent current but lacks watchdog capability.
Availability
MAX6386XS26D3-T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O submodules, and smart energy meters requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX6386XS26D3-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 industrial, automotive, communications, and computing markets.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-operated and thermally demanding embedded systems, emphasizing threshold stability, minimal supply current, and compact packaging.
FAQ
What is the exact reset threshold voltage of the MAX6386XS26D3-T?
The MAX6386XS26D3-T has a factory-set nominal reset threshold of 2.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "26"), and applies specifically to the MAX6386XS26D3-T variant-not the broader MAX6386 family.
Does the MAX6386XS26D3-T support manual reset, and how is it implemented?
Yes, the MAX6386XS26D3-T includes a debounced manual reset input (MR) on Pin 3. It features an internal 63kΩ pullup resistor to VCC, so MR can be left unconnected or tied to GND via a momentary switch. When pulled low, MR forces reset assertion and maintains it for the full 140ms timeout after release-no external debounce circuitry is required.
What package type and dimensions does the MAX6386XS26D3-T use?
The MAX6386XS26D3-T is supplied in a 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. Its land pattern is documented as 90-0187, and it is RoHS-compliant (denoted by the "+" suffix). This compact footprint supports high-density PCB layouts in portable and automotive applications.
Can the MAX6386XS26D3-T operate reliably below 1.8V supply voltage?
Yes, the MAX6386XS26D3-T operates across 1.0V to 5.5V. Its reset output remains guaranteed valid down to VCC = 1.0V, and supply current drops to just 3μA at 1.8V. However, at VCC < 1.8V, the open-drain RESET output's sink capability degrades (e.g., VOL ≤ 0.3V at ISINK = 80μA when VCC ≥ 1.0V), which must be accounted for in pullup resistor selection.
Is the MAX6386XS26D3-T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, the MAX6386XS26D3-T is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX6326–MAX6348 series. This compatibility applies to both SC70-4 and μDFN-6 variants within the family, enabling drop-in replacement in existing designs without PCB modification-provided the reset threshold and timeout requirements match.
MAX6386XS26D3-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:
- 2.63V
- 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
MAX6386XS26D3-T FAQ
1.How can I place an order for MAX6386XS26D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6386XS26D3-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 MAX6386XS26D3-T reliable?
The price and inventory of MAX6386XS26D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6386XS26D3-T is usually 5 days.
3.What payment methods are accepted for MAX6386XS26D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6386XS26D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6386XS26D3-T?
MAX6386XS26D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6386XS26D3-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 MAX6386XS26D3-T?
For technical support, including MAX6386XS26D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6386XS26D3-T requirements.
6.How does Aetrix verify that MAX6386XS26D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6386XS26D3-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 MAX6386XS26D3-T meets industry standards.
7.What is the process for return or replacement of MAX6386XS26D3-T?
All MAX6386XS26D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6386XS26D3-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 MAX6386XS26D3-T part is unused and in its original packaging.
Return procedure for MAX6386XS26D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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