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Analog Devices Inc./Maxim Integrated MAX6412UK44+T
- Part No.:
- MAX6412UK44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK44+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,817
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Product details
Overview
The MAX6412UK44+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 4.375V VCC reset threshold, manual reset input (MR), and active-low push-pull reset output. It monitors supply voltage in systems from 1.6V to 5V, asserts reset during brownout or power-up, and provides capacitor-adjustable timeout (3.0–5.75ms at CSRT = 1500pF). It is used in automotive ECUs and battery-powered controllers requiring guaranteed reset validity down to VCC = 1V.
For engineers reviewing the MAX6412UK44+T datasheet, MAX6412UK44+T pinout, MAX6412UK44+T application, or MAX6412UK44+T equivalent, key selection criteria include fixed 4.375V threshold accuracy (±2.5% over -40°C to +125°C), 1.7µA typical quiescent current at VCC ≤ 2.0V, SOT23-5 package compatibility, MR pulse width tolerance (≥1µs), and guaranteed reset assertion for VCC falling at 1mV/µs.
Technical Context
The MAX6412UK44+T implements a precision bandgap-based VCC monitor with 4.375V factory-trimmed threshold and 4.375mV hysteresis (4 × VTH), paired with a high-impedance manual reset input (MR) featuring internal 20kΩ pullup and 75ns glitch rejection. Its reset timeout is generated by a 240nA current source charging an external capacitor on the SRT pin, with deassertion triggered when the ramp reaches 0.65V.
It uses a push-pull output stage delivering VOL ≤ 0.3V at ISINK = 500µA (VCC ≥ 1.8V) and VOH ≥ 0.8 × VCC at ISOURCE = 200µA (VCC ≥ 1.8V), ensuring robust logic-level compatibility across 1.0V–5.5V supply range. All specifications are fully characterized from -40°C to +125°C and AEC-Q100 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.375V nominal, ±2.5% over full temperature range - sets precise brownout detection point for 5V or 4.5V rails |
| Quiescent Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year operation in battery-backed systems |
| Reset Timeout Range | 0.275ms (CSRT = 0) to 5.75ms (CSRT = 1500pF) - supports wide range of µP reset timing requirements |
| MR Input Logic | Active-low with 0.3×VCC VIH/0.7×VCC VIL thresholds - compatible with CMOS/TTL logic without level-shifting |
| Output Type | Active-low push-pull - drives reset line directly without external pullup, sinks 500µA at <0.3V |
| Operating Temp | -40°C to +125°C - validated for under-hood automotive and industrial embedded environments |
| Supply Range | 1.0V to 5.5V - ensures valid reset assertion even during deep brownout conditions |
Pinout & Package
SOT23-5 package (package code U5+2A), 5-pin surface-mount, RoHS-compliant lead-free construction, 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 input directly; sinks 500µA while asserted, sources 200µA when deasserted |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external capacitor (SRT) |
| 3 - MR | Manual reset input | Active-low control; internally pulled up to VCC (20kΩ); 1µs minimum pulse width required |
| 4 - SRT | Set reset timeout input | Connects to external capacitor (CSRT); 240nA constant current charges it to 0.65V for timeout timing |
| 5 - VCC | Supply voltage and monitored rail | Powers device and serves as primary monitored voltage; reset asserted if VCC falls below 4.375V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed VCC threshold accuracy | ±2.5% over -40°C to +125°C - eliminates need for external trimming in production |
| Capacitor-adjustable timeout | Programmable 0.275–5.75ms delay using single ceramic capacitor - replaces fixed-delay ICs or RC networks |
| Guaranteed reset at low VCC | Valid RESET output down to VCC = 1.0V - ensures reliable startup in ultra-low-voltage brownout scenarios |
| Power-supply transient immunity | Rejects 100mV VCC glitches lasting ≤50µs - prevents spurious resets in noisy automotive environments |
| AEC-Q100 qualification | Qualified for automotive applications per /V variants - supports functional safety-critical ECU monitoring |
Applications
| Engine Control Unit (ECU) | Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 5V system rail in engine management controller exposed to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Microprocessor supervisor asserting active-low reset during VCC dip below 4.375V or manual service reset. Use Value: Prevents corrupted firmware execution during automotive brownout; 75ns MR glitch rejection avoids false triggers from EMI. | Use Scenario: Ensures safe restart of battery-powered infusion pump MCU after battery insertion or low-battery recovery. IC Role / Device Role / Timing Role: Voltage monitor and reset generator with 4.375V threshold and 3.5ms timeout, synchronized to battery voltage rise. Use Value: 1.7µA quiescent current extends battery life; guaranteed reset down to VCC = 1V prevents undefined state during partial discharge. |
| Industrial PLC I/O Module | Portable Test Equipment |
Use Scenario: Supervises isolated 3.3V logic supply in programmable logic controller module operating in harsh factory environments. IC Role / Device Role / Timing Role: Dual-role supervisor: detects VCC undervoltage and accepts field-service MR signal via front-panel button. Use Value: Internal 20kΩ MR pullup eliminates external components; SOT23-5 footprint saves PCB space in dense I/O layouts. | Use Scenario: Provides controlled reset sequencing for ARM Cortex-M based handheld tester powered by single-cell Li-ion. IC Role / Device Role / Timing Role: Primary reset circuit asserting active-low signal to MCU upon power-on or user-initiated reset. Use Value: Capacitor-programmable timeout (e.g., 4.375ms with 1500pF) matches exact µP reset requirement without firmware delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK43+T | Fixed 4.3V threshold, same SOT23-5, but no MR input and open-drain output | Lacks manual reset capability and requires external pullup; unsuitable where field-service reset is needed | Select only if MR is unused and system already has pullup on reset line |
| TPS3808G33DBVR | Fixed 3.3V threshold, 1.6µA IQ, but no MR input and push-pull output | Designed for 3.3V systems only; cannot replace 4.375V threshold requirement without redesign | Use only in new 3.3V designs; not a drop-in replacement for MAX6412UK44+T |
Compared with MAX6412UK44+T, MAX6316LUK43+T omits manual reset and changes output type, limiting field serviceability, while TPS3808G33DBVR targets lower-voltage rails and lacks MR-neither meets the 4.375V threshold, MR support, and push-pull drive of MAX6412UK44+T in automotive or industrial reset-critical applications.
Availability
MAX6412UK44+T is available at Aetrix Electronics and suitable for automotive ECUs, medical infusion pumps, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6412UK44+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.
The MAX6412–MAX6420 family delivers low-power, capacitor-adjustable microprocessor supervisors optimized for reliable reset generation in battery-constrained and thermally harsh environments.
FAQ
What is the exact reset threshold voltage of the MAX6412UK44+T?
The MAX6412UK44+T has a factory-trimmed VCC reset threshold of 4.375V nominal, with ±2.5% accuracy over the full operating temperature range (-40°C to +125°C). This value is confirmed in the Electrical Characteristics table and corresponds to the "44" suffix in the part number per the Reset Voltages Suffix Table. The threshold is laser-trimmed using internal resistors and does not require external calibration.
Does the MAX6412UK44+T support manual reset functionality?
Yes, the MAX6412UK44+T includes a dedicated manual reset input (MR) on Pin 3. It is active-low, features an internal 20kΩ pullup resistor, and requires a minimum pulse width of 1µs. When MR is pulled low, the device asserts the active-low RESET output for the full timeout period-even if VCC remains above threshold-enabling field-service or debug-initiated system resets.
What capacitor value sets the standard 4.375ms reset timeout for the MAX6412UK44+T?
A 1500pF capacitor connected between the SRT pin (Pin 4) and GND sets the nominal 4.375ms reset timeout for the MAX6412UK44+T, as specified in the Electrical Characteristics table under tRP condition CSRT = 1500pF. The relationship is linear: tRP = (2.71 × 10⁶) × CSRT + 275µs, so 1500pF yields 4.375ms (typical at +25°C).
Is the MAX6412UK44+T qualified for automotive applications?
The MAX6412UK44+T itself is not explicitly marked /V in its part number, but it belongs to the AEC-Q100-qualified MAX6412–MAX6420 family. Per the Ordering Information, /V variants exist (e.g., MAX6414UK29/V+T), and the base family-including MAX6412UK44+T-is fully specified from -40°C to +125°C with automotive-grade reliability testing. For formal automotive qualification, the /V-suffixed version should be selected.
What is the maximum supply voltage the MAX6412UK44+T can tolerate on VCC?
The MAX6412UK44+T has an absolute maximum VCC rating of +6.0V, as stated in the Absolute Maximum Ratings table. However, its functional operating range is 1.0V to 5.5V. Operation above 5.5V may cause permanent damage, and the device is not guaranteed to function correctly beyond this limit-even briefly-so system design must ensure VCC stays within 1.0V–5.5V during normal and transient conditions.
MAX6412UK44+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:
- 4.375V
- 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
MAX6412UK44+T FAQ
1.How can I place an order for MAX6412UK44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK44+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 MAX6412UK44+T reliable?
The price and inventory of MAX6412UK44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK44+T is usually 5 days.
3.What payment methods are accepted for MAX6412UK44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6412UK44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6412UK44+T?
MAX6412UK44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK44+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 MAX6412UK44+T?
For technical support, including MAX6412UK44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK44+T requirements.
6.How does Aetrix verify that MAX6412UK44+T is sourced from the original manufacturer or authorized distributors?
All MAX6412UK44+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 MAX6412UK44+T meets industry standards.
7.What is the process for return or replacement of MAX6412UK44+T?
All MAX6412UK44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK44+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 MAX6412UK44+T part is unused and in its original packaging.
Return procedure for MAX6412UK44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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