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Analog Devices Inc./Maxim Integrated MAX6412UK26+
- Part No.:
- MAX6412UK26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK26+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,806
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Product details
Overview
The MAX6412UK26+ from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.625V VCC reset threshold, active-low push-pull reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors VCC from 1.0V to 5.5V, draws only 1.7µA typical supply current at 2.0V, and operates across –40°C to +125°C - ideal for automotive power-rail monitoring in engine control units.
For engineers reviewing the MAX6412UK26+ datasheet, MAX6412UK26+ pinout, MAX6412UK26+ application, or MAX6412UK26+ equivalent, key selection criteria include its factory-trimmed 2.625V threshold accuracy (±2.5% over temperature), guaranteed reset validity down to VCC = 1V, SOT23-5 package footprint, MR debounce-free operation, and immunity to sub-50µs VCC transients exceeding 100mV below threshold.
Technical Context
The MAX6412UK26+ implements a precision bandgap-based voltage comparator for VCC monitoring and a dedicated manual reset input path with internal 20kΩ pullup. Its reset timeout is set by an external capacitor on the SRT pin, driven by a 240nA ramp current charging toward a 0.65V internal reference.
Reset assertion occurs when either VCC falls below 2.625V (±2.5%) or MR is pulled low; deassertion requires both VCC > 2.625V and MR high for the full timeout period. The active-low push-pull RESET output sinks 50µA at 0.3V (VCC ≥ 1.0V) and sources 200µA at 0.8×VCC (VCC ≥ 1.8V), ensuring robust μP interface compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.625V ±2.5% over –40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| Supply Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year battery life in always-on vehicle subsystems |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0F to 1500pF) - supports short boot validation or extended firmware recovery windows |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor and reduces BOM count |
| VCC Validity Range | Reset guaranteed valid down to VCC = 1.0V - prevents spurious resets during deep brownout conditions |
| MR Input Logic | Logic-low active with 20kΩ internal pullup - allows direct switch-to-ground connection without external components |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, 0.95mm pitch, gull-wing leads. RoHS-compliant lead-free (+) variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives μP reset pin directly; sinks 50µA @ 0.3V (VCC ≥ 1.0V); no external pullup required |
| 2 - GND | Ground reference | Common return for all internal circuitry and external capacitor (SRT-to-GND) |
| 3 - MR | Manual reset input | Pull low to assert reset; internal 20kΩ pullup enables switch-to-ground implementation |
| 4 - SRT | Set reset timeout input | Connect external capacitor to ground; 240nA ramp current sets timeout via 0.65V threshold |
| 5 - VCC | Supply voltage and monitored rail | Input for fixed-threshold VCC supervision; also powers internal circuitry (1.0V to 5.5V range) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.625V ±2.5% over full temperature range - eliminates calibration effort and improves system reliability |
| Capacitor-adjustable timeout | 275µs to 5.75ms range using 0–1500pF capacitor - enables precise match to μP reset timing requirements |
| Low quiescent current | 1.7µA typical at 2.0V - critical for always-on automotive modules with strict leakage budgets |
| Power-supply transient immunity | Rejects <50µs negative VCC glitches >100mV below threshold - prevents false resets in noisy electrical environments |
| AEC-Q100 qualification | Qualified for automotive applications - meets stress test requirements for temperature, humidity, and lifetime |
Applications
| Engine Control Unit (ECU) Power Monitoring | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Continuous monitoring of 3.3V or 5V supply rails powering MCU and analog front-end in engine bay. IC Role / Device Role / Timing Role: Supervises VCC voltage integrity and provides deterministic reset pulse upon brownout or ignition cycle. Use Value: Prevents MCU lockup during cranking-induced voltage sag; 2.625V threshold aligns with 3.3V rail tolerance limits. | Use Scenario: Ensuring clean startup and fault recovery of image sensor and ISP in rear-view camera systems. IC Role / Device Role / Timing Role: Generates reset signal synchronized to stable 1.8V core and 2.8V I/O rail sequencing. Use Value: Guarantees reset assertion until both rails exceed 2.625V and remain stable for ≥3ms - avoids partial initialization. |
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
Use Scenario: Managing safe boot sequence of application processor and companion PMIC after vehicle wake-up. IC Role / Device Role / Timing Role: Provides manual reset capability via CAN-triggered GPIO and VCC supervision with adjustable timeout. Use Value: MR pin enables software-initiated recovery without physical button; 1.7µA current extends sleep-mode battery life. | Use Scenario: Monitoring dual supplies (e.g., 5V modem rail and 3.3V MCU rail) in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Asserts reset if either rail drops below 2.625V - protects against single-rail failure causing data corruption. Use Value: Push-pull output drives multiple downstream reset inputs simultaneously without fanout limitations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6412UK25+ | Fixed 2.500V reset threshold (±2.5%), otherwise identical pinout, timing, and features | Suitable where system brownout threshold is tighter to 2.5V nominal rail | Select MAX6412UK25+ only if design requires 2.500V threshold; MAX6412UK26+ provides margin for 2.6V nominal rails |
| TLV803EB26DBZR | 2.63V threshold, open-drain output, 0.9µA supply current, SOT23-3 package (no MR pin) | Lacks manual reset and adjustable timeout; smaller footprint but reduced functionality | Choose TLV803EB26DBZR only for space-constrained, cost-sensitive designs without MR or timeout flexibility needs |
Compared with MAX6412UK25+, the MAX6412UK26+ offers higher threshold margin for 2.6V rails; compared with TLV803EB26DBZR, it adds MR input and capacitor-adjustable timeout at the cost of one extra pin and slightly higher quiescent current.
Availability
MAX6412UK26+ is available at Aetrix Electronics and suitable for automotive electronics, battery-powered controllers, and embedded industrial systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6412UK26+ 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 communications applications.
The MAX6412–MAX6420 family delivers low-power, high-accuracy microprocessor supervision with flexible reset configuration - engineered specifically for automotive-grade reliability and wide-temperature operation.
FAQ
What is the exact reset threshold voltage of the MAX6412UK26+?
The MAX6412UK26+ has a factory-trimmed VCC reset threshold of 2.625V, with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This value is confirmed in Table 1 of the datasheet (suffix "26") and verified in the Electrical Characteristics table under VTH parameter. The MAX6412UK26+ uses laser-trimmed resistors to achieve this precision without external calibration.
Does the MAX6412UK26+ support manual reset functionality?
Yes, the MAX6412UK26+ includes a dedicated MR (manual reset) input on pin 3. Pulling MR low asserts the active-low RESET output for the full timeout period, even if VCC remains above threshold. An internal 20kΩ pullup resistor allows direct connection of a momentary switch to ground - no external components are needed. This feature is explicitly enabled in the MAX6412 series per the Selector Guide.
What package type and footprint does the MAX6412UK26+ use?
The MAX6412UK26+ is supplied in a 5-pin SOT23 package (package code U5+2), measuring 2.9mm × 1.6mm × 1.1mm with 0.95mm lead pitch. It is RoHS-compliant and lead-free ("+" suffix). Land pattern #90-0174 applies, and the device is compatible with standard SOT23-5 reflow profiles - peak soldering temperature is +260°C for lead-free assembly.
How is the reset timeout period set on the MAX6412UK26+?
The reset timeout period on the MAX6412UK26+ is set by connecting an external capacitor (CSRT) between pin 4 (SRT) and ground. The timeout tRP (in seconds) follows tRP = (2.71 × 10⁶) × CSRT + 275µs. For example, a 1000pF capacitor yields ~3.0ms timeout. Ceramic capacitors with leakage <10nA are recommended, and layout must minimize stray capacitance on the SRT node.
Is the MAX6412UK26+ qualified for automotive applications?
Yes, the MAX6412UK26+ is AEC-Q100 qualified for automotive use. It is fully specified from –40°C to +125°C, features power-supply transient immunity (rejects <50µs glitches >100mV below threshold), and is offered in automotive-grade packaging. While the "/V" suffix denotes explicit automotive qualification, the MAX6412UK26+ shares identical process, testing, and reliability data with /V parts per Maxim's ordering information.
MAX6412UK26+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6412UK26+ FAQ
1.How can I place an order for MAX6412UK26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK26+ 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 MAX6412UK26+ reliable?
The price and inventory of MAX6412UK26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK26+ is usually 5 days.
3.What payment methods are accepted for MAX6412UK26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6412UK26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6412UK26+?
MAX6412UK26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK26+ 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 MAX6412UK26+?
For technical support, including MAX6412UK26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK26+ requirements.
6.How does Aetrix verify that MAX6412UK26+ is sourced from the original manufacturer or authorized distributors?
All MAX6412UK26+ 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 MAX6412UK26+ meets industry standards.
7.What is the process for return or replacement of MAX6412UK26+?
All MAX6412UK26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK26+, 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 MAX6412UK26+ part is unused and in its original packaging.
Return procedure for MAX6412UK26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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