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Analog Devices Inc./Maxim Integrated MAX6412UK29+T
- Part No.:
- MAX6412UK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,778
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Product details
Overview
MAX6412UK29+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.925V VCC reset threshold, manual reset input (MR), and active-low push-pull RESET output. It monitors supply voltage in battery-powered controllers and embedded systems, asserts reset during brownout or power-up, and guarantees valid reset logic down to VCC = 1V. The reset timeout is capacitor-adjustable (275µs to >5ms) for flexible µP compatibility.
For engineers reviewing the MAX6412UK29+T datasheet, MAX6412UK29+T pinout, MAX6412UK29+T application, or MAX6412UK29+T equivalent, this page delivers verified electrical specs, SOT23-5 package details, dual-voltage monitoring limitations, quiescent current (1.7µA typ), and AEC-Q100-qualified alternatives for automotive and medical designs.
Technical Context
The MAX6412UK29+T implements a precision bandgap-based VCC monitor with ±1.25% threshold accuracy at +25°C and ±2.5% over –40°C to +125°C. Its internal 240nA SRT ramp current charges an external capacitor to set reset timeout, with guaranteed deassertion after reaching 0.65V reference.
It features a 20kΩ internal MR pullup resistor, 75ns MR glitch rejection, and 20ns MR-to-RESET delay. The active-low push-pull RESET output sinks 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V, and remains valid across full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.925V (typ), ±1.25% accuracy at +25°C - ensures reliable brownout detection for 3.3V systems |
| Supply Current | 1.7µA (typ) at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered devices |
| Reset Timeout Range | 275µs to >5.75ms (CSRT = 0F to 1500pF) - supports µP reset timing requirements from fast-boot to safety-critical delays |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup, drives standard CMOS µP reset inputs directly |
| MR Input Logic | Active-low with 20kΩ internal pullup - simplifies manual reset implementation using momentary switch to GND |
| Guaranteed RESET Validity | Valid down to VCC = 1V - ensures deterministic reset behavior during deep brownout conditions |
Pinout & Package
SOT23-5 package (U5+2A outline), 5-pin surface-mount, RoHS-compliant lead-free (+T suffix), thermal resistance θJA = 255.9°C/W (multi-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V; no external pullup required |
| 2 - GND | Ground reference | Return path for all internal circuits; must be low-impedance connection to system ground plane |
| 3 - MR | Manual reset input | Active-low; internally pulled up to VCC (20kΩ); 1µs minimum pulse width; 75ns glitch rejection |
| 4 - SRT | Set reset timeout input | Connects to external capacitor (CSRT); 240nA constant current source sets tRP = 2.71×10⁶ × CSRT + 275µs |
| 5 - VCC | Supply voltage input | Accepts 1.0V to 5.5V; powers internal comparators and reset logic; monitored for 2.925V threshold violation |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.925V VCC threshold | Laser-trimmed accuracy enables precise brownout detection for 3.3V rails without external resistors |
| Capacitor-adjustable timeout | External CSRT selection allows exact match to µP's required reset hold time (e.g., 100ms via 36nF) |
| Low 1.7µA quiescent current | Extends battery life in portable medical instruments and remote sensors operating on CR2032 cells |
| MR with internal 20kΩ pullup | Eliminates BOM cost and layout area for external pullup; supports direct switch-to-ground manual reset |
| AEC-Q100 qualified option | Available as /V variant (e.g., MAX6412UK29/V+T) for automotive applications requiring stress-tested reliability |
Applications
| Automotive Body Control Module | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in door module during cold-crank battery dip (down to 6V). IC Role / Device Role / Timing Role: Supervisor asserts RESET when VCC falls below 2.925V; holds reset for 200ms after recovery to prevent erratic boot. Use Value: Prevents firmware corruption during engine start transients; meets ISO 16750-2 pulse 4 immunity requirements. |
Use Scenario: Powers-on glucose sensor interface after button press in battery-operated handheld device. IC Role / Device Role / Timing Role: MR input triggers controlled reset; RESET output holds µP in reset for 100ms while analog front-end stabilizes. Use Value: Eliminates power-rail sequencing ICs; reduces bill-of-materials by integrating manual + power-fail reset in one SOT23-5 device. |
| Industrial PLC I/O Expansion Card | Smart Energy Meter MCU Supervision |
Use Scenario: Ensures deterministic restart of ARM Cortex-M4 after 24V DC-DC converter undervoltage event. IC Role / Device Role / Timing Role: VCC monitor detects rail collapse; RESET remains asserted for 50ms post-recovery to guarantee clean boot sequence. Use Value: Meets IEC 61000-4-28 AC voltage dip immunity; avoids watchdog timeout lockup during field-deployed operation. |
Use Scenario: Supervises metrology SoC during utility grid brownouts lasting 100–500ms. IC Role / Device Role / Timing Role: Fixed 2.925V threshold tracks 3.3V LDO output; capacitor-tuned 350ms timeout prevents spurious resets during short dips. Use Value: Maintains accurate energy logging across ANSI C12.1 transient profiles; certified for ANSI C12.20 Class 0.2 meters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6412UK29/V+T | AEC-Q100 qualified; identical electrical specs and pinout; automotive-grade screening and traceability | Required for automotive body electronics, infotainment, and ADAS modules needing PPAP documentation | Select when automotive qualification, extended temperature validation, or failure-in-time (FIT) data are mandatory |
| TPS3808G29DBVR | Fixed 2.93V threshold; 1.6µA IQ; 200ms factory-fixed timeout (non-adjustable); same SOT23-5 package | Suitable for cost-sensitive consumer IoT where adjustable timeout is unnecessary and tighter BOM control is needed | Choose when predictable, non-field-configurable reset timing suffices and automotive qualification is not required |
Compared with MAX6412UK29+T, the /V+T variant adds automotive reliability assurance without altering functionality, while TPS3808G29DBVR trades timeout flexibility for lower cost and simpler design-in-ideal when fixed delay meets system requirements.
Availability
MAX6412UK29+T is available at Aetrix Electronics and suitable for automotive body control modules, portable medical instruments, industrial PLC expansion cards, smart energy meters, and battery-powered embedded controllers requiring stable component supply across extended temperature ranges.
Supply support for MAX6412UK29+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 demanding industrial, automotive, and medical applications, with emphasis on low-power, high-reliability solutions.
The MAX6412–MAX6420 family was engineered specifically for robust µP supervision in harsh environments, delivering capacitor-adjustable reset timing, ultra-low quiescent current, and guaranteed operation down to VCC = 1V.
FAQ
What is the exact reset threshold voltage of MAX6412UK29+T?
The MAX6412UK29+T has a nominal VCC reset threshold of 2.925V, with ±1.25% accuracy at +25°C and ±2.5% over –40°C to +125°C. This value is laser-trimmed at wafer sort and confirmed in the Electrical Characteristics table of the official datasheet. The '29' suffix directly references the 2.925V specification per Table 1 in the datasheet.
Does MAX6412UK29+T support dual-voltage monitoring?
No, MAX6412UK29+T does not support dual-voltage monitoring. It is a single-threshold supervisor with only VCC monitoring and a manual reset input (MR). Dual-voltage capability requires models like MAX6418UK29+T, which include both fixed VCC threshold and adjustable RESET IN inputs - a feature absent in the MAX6412 series.
How do I calculate the capacitor value for a 200ms reset timeout with MAX6412UK29+T?
Use the formula tRP = (2.71 × 10⁶) × CSRT + 275µs. For tRP = 200ms (0.2s), solve: CSRT = (0.2 − 0.000275) / 2.71×10⁶ ≈ 73.7nF. Select a low-leakage ceramic capacitor (e.g., X7R, <10nA leakage) rated for ≥6.3V. Verify timing with oscilloscope on RESET pin during VCC ramp tests.
Is MAX6412UK29+T pin-compatible with other MAX6412 variants?
Yes, all MAX6412UKxx+T variants share identical SOT23-5 pinout, electrical interface, and functional behavior - only the factory-trimmed VCC reset threshold differs (e.g., UK16 = 1.575V, UK29 = 2.925V). No PCB changes are required when substituting within the MAX6412 family.
What is the maximum recommended capacitance for the SRT pin on MAX6412UK29+T?
The datasheet specifies no absolute maximum SRT capacitance, but practical limits arise from leakage and parasitic effects. For reliable operation, use CSRT ≤ 100nF with low-leakage ceramic capacitors (X7R/C0G). Larger values increase sensitivity to board leakage and reduce timing accuracy; above 100nF, verify performance across temperature and humidity in final application.
MAX6412UK29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.925V
- 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
MAX6412UK29+T FAQ
1.How can I place an order for MAX6412UK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK29+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 MAX6412UK29+T reliable?
The price and inventory of MAX6412UK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK29+T is usually 5 days.
3.What payment methods are accepted for MAX6412UK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6412UK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6412UK29+T?
MAX6412UK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK29+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 MAX6412UK29+T?
For technical support, including MAX6412UK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK29+T requirements.
6.How does Aetrix verify that MAX6412UK29+T is sourced from the original manufacturer or authorized distributors?
All MAX6412UK29+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 MAX6412UK29+T meets industry standards.
7.What is the process for return or replacement of MAX6412UK29+T?
All MAX6412UK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK29+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 MAX6412UK29+T part is unused and in its original packaging.
Return procedure for MAX6412UK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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