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Analog Devices Inc./Maxim Integrated MAX6412UK46+T
- Part No.:
- MAX6412UK46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK46+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,370
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Product details
Overview
The MAX6412UK46+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 4.625V 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 when VCC drops below 4.625V or MR is pulled low, and holds reset for a capacitor-adjustable timeout period. Operating from -40°C to +125°C, it delivers 1.7μA typical quiescent current and guarantees valid reset down to VCC = 1V.
For engineers reviewing the MAX6412UK46+T datasheet, MAX6412UK46+T pinout, MAX6412UK46+T application, or MAX6412UK46+T equivalent, key selection considerations include its fixed 4.625V threshold accuracy (±2.5% over temperature), SOT23-5 package footprint, capacitor-programmable reset timeout (275µs to 5.75ms), manual reset functionality with internal 20kΩ pullup, and guaranteed operation at VCC as low as 1V.
Technical Context
The MAX6412UK46+T implements a precision bandgap-based voltage comparator for VCC monitoring and a dedicated manual reset input path, both feeding into a state machine that controls an active-low push-pull output driver. Its reset timeout is generated by a 240nA current source charging an external capacitor on the SRT pin, with deassertion triggered upon reaching a 0.65V internal reference.
This device belongs to the MAX6412–MAX6420 family of single/dual-voltage supervisors, where the MAX6412 variant specifically provides factory-trimmed fixed-threshold monitoring (4.625V nominal) plus MR input-no adjustable RESET IN-and uses push-pull active-low RESET output. All variants share the same SOT23-5 package and -40°C to +125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.625V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection for 5V systems |
| Quiescent Current | 1.7μA typical at VCC ≤ 2.0V - enables multi-year battery life in portable equipment |
| Reset Timeout Range | 275µs to 5.75ms via external SRT capacitor - supports μP power-up timing across diverse architectures |
| Output Type | Active-low push-pull - drives standard CMOS μP reset inputs without external pullup |
| Manual Reset Input | Internal 20kΩ pullup, 1µs minimum pulse width - simplifies front-panel reset button implementation |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| VCC Validity Range | Guaranteed RESET validity down to VCC = 1V - ensures deterministic behavior during deep brownout |
Pinout & Package
Package: SOT23-5, 5-pin surface-mount package with 0.95mm pitch, JEDEC MO-178AC compliant, 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 50µA at VCC ≥ 1.8V with VOL ≤ 0.3V |
| 2 - GND | Ground reference | Common return for all internal circuitry and external capacitor (SRT) |
| 3 - MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC (20kΩ) |
| 4 - SRT | Set reset timeout input | Connects to external capacitor; 240nA constant current charges CSRT to set tRP |
| 5 - VCC | Supply voltage input | Power source and monitored rail; operates from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.625V reset threshold | Factory-laser-trimmed for ±2.5% accuracy over full temperature range - eliminates external resistor divider |
| Capacitor-adjustable timeout | External CSRT sets precise reset hold time (275µs–5.75ms) - accommodates diverse μP startup requirements |
| Manual reset with internal pullup | 20kΩ integrated pullup allows momentary switch to ground - no external components needed for MR function |
| Low 1.7μA quiescent current | Enables use in always-on battery-backed systems - extends operational lifetime significantly |
| Valid reset down to VCC = 1V | Ensures deterministic reset assertion during severe brownout - prevents erratic μP execution |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 5V supply rail in engine control module exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to MCU during brownout or cold-cranking conditions. Use Value: Guarantees MCU reset integrity at VCC ≥ 1V and withstands transients per AEC-Q100 requirements. | Use Scenario: Powers on/off sequence control in handheld blood glucose meter with coin-cell battery. IC Role / Device Role / Timing Role: Ensures clean MCU initialization after battery insertion or low-battery recovery. Use Value: 1.7μA quiescent current preserves battery life; 4.625V threshold matches regulated 5V LDO output. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Supervises auxiliary 3.3V/5V rails powering isolated communication interfaces in factory automation hardware. IC Role / Device Role / Timing Role: Provides fail-safe reset during power interruption or ESD-induced supply sag. Use Value: -40°C to +125°C rating ensures reliability in uncontrolled cabinet environments. | Use Scenario: Controls power-up sequencing of metrology ASIC and RF transceiver in battery-backed utility meter. IC Role / Device Role / Timing Role: Generates programmable reset pulse to synchronize subsystem initialization. Use Value: Capacitor-adjustable timeout (via SRT) aligns reset duration with slow-starting analog front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT46+T | Fixed 4.63V threshold, 1.6μA ICC, same SOT23-5, but no manual reset input | Suitable only where MR is unnecessary; lacks MR pin functionality | Select when manual reset is not required and lowest possible quiescent current is critical |
| TPS3808G33DBVR | Fixed 3.3V threshold, 2.8μA ICC, SOT23-6, includes watchdog timer | Not a direct voltage match; requires redesign for 4.625V monitoring | Choose only if system needs watchdog capability and can accommodate different threshold and pin count |
Compared with MAX6412UK46+T, MAX6326UT46+T offers marginally lower current but omits MR-making it unsuitable for user-initiated reset. TPS3808G33DBVR adds watchdog functionality but targets 3.3V systems and requires PCB layout changes due to SOT23-6 and incompatible threshold.
Availability
MAX6412UK46+T is available at Aetrix Electronics and suitable for automotive ECUs, portable medical monitors, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6412UK46+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 high-performance analog and mixed-signal semiconductor solutions for industrial, automotive, and computing markets.
The MAX6412UK46+T belongs to the MAX6412–MAX6420 supervisor family, engineered for ultra-low-power, precision voltage monitoring in safety-critical embedded systems where reliable power-on reset and brownout protection are mandatory.
FAQ
What is the exact reset threshold voltage of the MAX6412UK46+T?
The MAX6412UK46+T has a factory-trimmed nominal VCC reset threshold of 4.625V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and corresponds to the "46" suffix in the part number per Maxim's Reset Voltages Suffix Table.
Does the MAX6412UK46+T support dual-voltage monitoring?
No, the MAX6412UK46+T does not support dual-voltage monitoring. It is a single-threshold supervisor with a fixed 4.625V VCC monitor and manual reset input (MR). Dual-voltage capability is reserved for MAX6418/MAX6419/MAX6420 variants, which include both fixed and adjustable RESET IN inputs.
How do I calculate the external capacitor value for a desired reset timeout on the MAX6412UK46+T?
Use the formula CSRT = (tRP − 275µs) / 2.71 × 10⁶, where tRP is the desired timeout in seconds and CSRT is in farads. For example, a 4.375ms timeout requires CSRT = (0.004375 − 0.000275) / 2.71 × 10⁶ = 1500pF. Ceramic capacitors with leakage <10nA are recommended.
Is the MAX6412UK46+T pin-compatible with other devices in the MAX6412–MAX6420 family?
Yes, all MAX6412–MAX6420 devices use the identical SOT23-5 package and share the same pinout: Pin 1 = RESET, Pin 2 = GND, Pin 3 = MR (or RESET IN), Pin 4 = SRT, Pin 5 = VCC. However, functional differences exist - e.g., MAX6413 has active-high RESET, MAX6414 has open-drain output - so electrical compatibility must be verified per application.
What is the maximum supply voltage the MAX6412UK46+T can tolerate?
The MAX6412UK46+T has an absolute maximum VCC rating of +6.0V, but its specified operating range is 1.0V to 5.5V. Operation above 5.5V risks permanent damage, and the device is not characterized or guaranteed beyond this limit. For 5V systems, the 4.625V threshold provides appropriate margin against overvoltage.
MAX6412UK46+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:
- 4.625V
- 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
MAX6412UK46+T FAQ
1.How can I place an order for MAX6412UK46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK46+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 MAX6412UK46+T reliable?
The price and inventory of MAX6412UK46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK46+T is usually 5 days.
3.What payment methods are accepted for MAX6412UK46+T?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6412UK46+T?
MAX6412UK46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK46+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 MAX6412UK46+T?
For technical support, including MAX6412UK46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK46+T requirements.
6.How does Aetrix verify that MAX6412UK46+T is sourced from the original manufacturer or authorized distributors?
All MAX6412UK46+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 MAX6412UK46+T meets industry standards.
7.What is the process for return or replacement of MAX6412UK46+T?
All MAX6412UK46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK46+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 MAX6412UK46+T part is unused and in its original packaging.
Return procedure for MAX6412UK46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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