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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:
- POWER SUPPLY SUPPORT CIRCUIT, FI
- Quantity:
- Payment:
- Shipping:
Inventory:37,145
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Product details
Overview
The MAX6412UK29-T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.925V 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, guarantees valid reset down to VCC = 1V, and operates across –40°C to +125°C for automotive and industrial embedded systems.
For engineers reviewing the MAX6412UK29-T datasheet, MAX6412UK29-T pinout, MAX6412UK29-T application, or MAX6412UK29-T equivalent, this device delivers precise brownout detection, manual reset capability, and externally programmable reset delay - critical for reliable power-up sequencing in battery-powered controllers and safety-critical μP systems.
Technical Context
The MAX6412UK29-T implements a factory-laser-trimmed bandgap reference and comparator to detect VCC falling below 2.925V ±2.5% over temperature. Its internal 20kΩ MR pullup enables momentary-switch manual reset without external components.
Reset assertion is triggered by VCC drop, MR low, or both; deassertion requires VCC rise above threshold plus capacitor-charged timeout (tRP = 2.71×10⁶ × CSRT + 275µs). The active-low push-pull RESET output sinks 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V, ensuring robust drive into μP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.925V ±2.5% over –40°C to +125°C - ensures accurate brownout detection across automotive temperature range |
| Supply Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year operation in battery-backed systems |
| Reset Timeout Range | 0.275ms to 5.75ms (with CSRT = 0F to 1500pF) - supports wide μP reset timing requirements via single capacitor |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor and provides fast, rail-to-rail logic transitions |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| MR Input Logic | CMOS-compatible with internal 20kΩ pullup - allows direct connection of NO momentary switch to ground |
| VCC Validity Range | 1.0V to 5.5V - guarantees RESET validity during deep brownout and full supply range |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).
| 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 CMOS input with internal 20kΩ pullup; 1µs minimum pulse width; 75ns glitch rejection |
| 4 - SRT | Set reset timeout input | Connects to external capacitor (CSRT); 240nA precision ramp current sets tRP = 2.71×10⁶ × CSRT + 275µs |
| 5 - VCC | Supply voltage and monitored rail | Input for fixed-threshold VCC supervision; also powers internal circuitry; absolute max = +6.0V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.925V reset threshold | Laser-trimmed accuracy (±2.5% over temp) eliminates calibration effort and reduces BOM count vs adjustable supervisors |
| Capacitor-adjustable timeout | Single external capacitor (0–1500pF) sets reset hold time from 275µs to 5.75ms - avoids fixed-delay IC selection complexity |
| Manual reset with internal pullup | 20kΩ integrated MR pullup enables NO switch-to-ground implementation - saves PCB space and component cost |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout - prevents μP lockup in low-VCC fault conditions |
| Power-supply transient immunity | Rejects <50µs negative VCC transients down to 100mV below threshold - improves reliability in noisy automotive environments |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply during cold cranking when battery dips to 6V, causing rail sag. IC Role / Device Role / Timing Role: Supervisor asserts RESET until VCC recovers above 2.925V and holds for 4.375ms (CSRT = 1500pF) to ensure stable μP boot. Use Value: Prevents corrupted firmware execution during voltage transients; AEC-Q100 qualification confirms suitability for under-hood deployment. |
Use Scenario: Ensures safe restart after battery swap or low-battery warning in handheld infusion controller. IC Role / Device Role / Timing Role: Detects 3.0V system rail collapse and triggers 3.0ms reset pulse via MR button press, guaranteeing clean μP initialization. Use Value: 1.7µA quiescent current extends battery life; manual reset meets IEC 62304 safety requirement for user-initiated recovery. |
| Industrial PLC I/O Module | Smart Energy Meter MCU |
Use Scenario: Supervises isolated 5V DC-DC output powering ARM Cortex-M4 core in harsh factory environment. IC Role / Device Role / Timing Role: Provides VCC monitoring and noise-immune MR input for field technician reset; timeout set to 5.75ms for slow-ramping supplies. Use Value: –40°C to +125°C operation ensures reliability in uncooled enclosures; push-pull output drives long traces without signal degradation. |
Use Scenario: Guards against meter firmware corruption during AC line dropout or lightning-induced surges on 3.3V rail. IC Role / Device Role / Timing Role: Detects VCC fall below 2.925V and asserts RESET for 4.375ms (CSRT = 1500pF) before re-enabling metrology functions. Use Value: 75ns MR glitch rejection prevents false resets from EMI; guaranteed operation at VCC = 1V covers worst-case brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6412UK29+T | Identical electrical specs and pinout; lead-free (RoHS) packaging vs leaded (-T) | No functional difference; selected when RoHS compliance is mandatory | Choose MAX6412UK29+T for new designs requiring lead-free assembly; MAX6412UK29-T remains viable for legacy leaded processes. |
| TPS3808G29DBVR | Fixed 2.93V threshold, 350nA IQ, open-drain RESET, no MR input | Lacks manual reset; requires external pullup; lower IQ but less flexible reset control | Select TPS3808G29DBVR only if manual reset is unnecessary and ultra-low current (<1µA) is prioritized over feature completeness. |
Compared with MAX6412UK29-T, MAX6412UK29+T offers identical performance in RoHS-compliant packaging, while TPS3808G29DBVR trades manual reset and push-pull drive for lower quiescent current - making MAX6412UK29-T optimal for designs needing field-serviceable reset and robust output drive.
Availability
MAX6412UK29-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
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, emphasizing high reliability and extended temperature performance.
The MAX6412–MAX6420 family was engineered specifically for robust μP supervision in safety-critical systems, featuring laser-trimmed thresholds, capacitor-programmable timing, and AEC-Q100 qualification options.
FAQ
What is the exact reset threshold voltage of the MAX6412UK29-T?
The MAX6412UK29-T has a factory-trimmed VCC reset threshold of 2.925V, with tolerance of ±1.25% at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed in the Electrical Characteristics table and corresponds to the "29" suffix per the Reset Voltages Suffix Table in the datasheet.
Does the MAX6412UK29-T include a manual reset input?
Yes, the MAX6412UK29-T includes a dedicated MR (manual reset) input on Pin 3. It is an active-low CMOS input with an internal 20kΩ pullup resistor, enabling direct connection of a normally open momentary switch to ground without external components.
What type of reset output does the MAX6412UK29-T provide?
The MAX6412UK29-T provides an active-low push-pull reset output on Pin 1. This eliminates the need for an external pullup resistor and ensures strong logic-level drive - sinking up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V - making it ideal for driving modern μP reset inputs directly.
How is the reset timeout period set on the MAX6412UK29-T?
The reset timeout period on the MAX6412UK29-T is set by connecting an external capacitor (CSRT) between Pin 4 (SRT) and ground. The relationship is tRP = (2.71 × 10⁶) × CSRT + 275µs, where tRP is in seconds and CSRT is in farads. A 1500pF capacitor yields a typical timeout of 4.375ms.
Is the MAX6412UK29-T qualified for automotive applications?
The MAX6412UK29-T itself is not explicitly marked as /V (AEC-Q100 qualified) in the Ordering Information table. However, the MAX6412 family includes /V variants (e.g., MAX6412UK29/V+T), and the MAX6412UK29-T shares the same die, SOT23-5 package, and –40°C to +125°C rating - confirming its suitability for automotive environments when qualified versions are unavailable.
MAX6412UK29-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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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