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Analog Devices Inc./Maxim Integrated MAX6412UK31+T
- Part No.:
- MAX6412UK31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,594
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Product details
Overview
The MAX6412UK31+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 3.075V 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 (2.75ms to 5.75ms with 1500pF). It operates across –40°C to +125°C and draws only 1.7µA typical quiescent current - ideal for automotive and battery-powered embedded controllers.
For engineers reviewing the MAX6412UK31+T datasheet, MAX6412UK31+T pinout, MAX6412UK31+T application, or MAX6412UK31+T equivalent, key selection criteria include its factory-trimmed 3.075V threshold accuracy (±2.5% over temperature), guaranteed RESET validity down to VCC = 1V, MR glitch rejection (75ns), internal 20kΩ MR pullup, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6412UK31+T implements a precision bandgap-based VCC monitor with 2.5% threshold tolerance over –40°C to +125°C and 4mV hysteresis. Its reset assertion logic responds to VCC falling below 3.075V or MR being pulled low, holding RESET low for a user-defined timeout period set by an external capacitor on the SRT pin.
Reset deassertion follows a controlled ramp: a 240nA current source charges the SRT capacitor to 0.65V, yielding a timeout of tRP = (2.71 × 10⁶) × CSRT + 275µs. The device guarantees valid RESET output at VCC ≥ 1V and includes power-supply transient immunity - rejecting negative-going VCC glitches ≤50µs when overdriven by 100mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.075V nominal, ±2.5% over –40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| Quiescent Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered monitoring systems |
| RESET Output Type | Active-low push-pull - drives µP reset pin directly without external pullup; sinks 3.2mA at VCC ≥ 4.5V |
| Reset Timeout Range | 0.275ms (no capacitor) to 5.75ms (1500pF) - supports diverse µP reset timing requirements |
| MR Input Logic | Active-low with 20kΩ internal pullup - simplifies manual reset implementation using momentary switch to GND |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| VCC Supply Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
Pinout & Package
MAX6412UK31+T is housed in a RoHS-compliant, lead-free SOT23-5 package (package code U5+2A), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks up to 3.2mA; valid for VCC ≥ 1V |
| 2 - GND | Ground reference | Return path for all internal circuitry and SRT capacitor discharge |
| 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; 240nA constant-current ramp source sets timeout period |
| 5 - VCC | Supply voltage and monitored rail | Input for fixed-threshold VCC supervision; also powers internal circuitry (1.0V–5.5V range) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed VCC threshold | 3.075V with ±2.5% tolerance over full temperature range - eliminates calibration overhead in production |
| Capacitor-adjustable timeout | Programmable 0.275ms–5.75ms delay via single external capacitor - replaces fixed-delay supervisors and saves BOM cost |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic µP reset state during deep undervoltage events - critical for fail-safe automotive subsystems |
| Internal MR pullup resistor | 20kΩ integrated pullup - removes need for external component and reduces layout complexity |
| Power-supply transient immunity | Rejects VCC glitches ≤50µs at 100mV overdrive - prevents spurious resets in noisy electrical environments |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in engine management system exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to ARM Cortex-M7 during brownout or cold-cranking (VCC dip to 2.8V). Use Value: Prevents erratic ECU behavior by guaranteeing reset assertion until VCC stabilizes above 3.075V and holds RESET low for ≥3ms - meeting ISO 16750-2 pulse 4a requirements. | Use Scenario: Ensures safe restart of safety-critical MCU after battery insertion or low-battery recovery in handheld infusion device. IC Role / Device Role / Timing Role: Supervises main 3.0V Li-ion supply and triggers hardware reset via MR button press or VCC sag. Use Value: 1.7µA quiescent current extends battery life; ±2.5% threshold accuracy avoids false resets during gradual voltage decay; SOT23-5 fits tight PCB real estate. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Provides robust power-on reset and brownout protection for dual-rail (3.3V/5V) controller in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Single-supply supervisor for 3.3V core rail; MR pin enables field-service reset without power cycle. Use Value: Internal 20kΩ MR pullup eliminates external resistor; –40°C to +125°C rating ensures reliability in uncooled enclosures; push-pull output drives long traces without signal degradation. | Use Scenario: Monitors 3.3V supply powering metrology SoC and RF transceiver in utility-grade electricity meter operating 20+ years in outdoor cabinets. IC Role / Device Role / Timing Role: Primary reset generator ensuring deterministic boot sequence after AC power interruption or battery backup switchover. Use Value: Low leakage (10nA RESET IN) and stable threshold minimize drift over lifetime; AEC-Q100-compatible construction enhances long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBVR | Fixed 3.3V threshold; no manual reset; open-drain output; 1.6µA ICC | Lacks MR input and push-pull drive - requires external pullup and cannot support hardware-initiated reset | Select when only VCC monitoring is needed and system-level reset control is handled elsewhere |
| MAX6315US33D3+ | 3.3V threshold; push-pull active-low; no MR; fixed 200ms timeout; 10µA ICC | Fixed timeout limits flexibility; higher current draw reduces battery life in portable designs | Choose for cost-sensitive applications where adjustable timeout is unnecessary and 200ms is acceptable |
Compared with TLV809E33DBVR and MAX6315US33D3+, the MAX6412UK31+T uniquely combines factory-trimmed 3.075V accuracy, integrated MR with pullup, capacitor-adjustable timeout, and ultra-low 1.7µA supply current - making it optimal for automotive and battery-powered systems requiring precise, flexible, and robust reset control.
Availability
MAX6412UK31+T is available at Aetrix Electronics and suitable for automotive ECUs, portable medical devices, and industrial PLC modules requiring stable component supply, AEC-Q100-aligned reliability, and extended temperature operation.
Supply support for MAX6412UK31+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 computing applications.
The MAX6412UK31+T belongs to the MAX6412–MAX6420 family of low-power µP supervisors engineered for reliable power-on reset, brownout detection, and manual reset in harsh environments - especially where small size, low current, and wide temperature range are critical.
FAQ
What is the exact reset threshold voltage of the MAX6412UK31+T?
The MAX6412UK31+T has a factory-trimmed VCC reset threshold of 3.075V nominal, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value corresponds to the "31" suffix per Maxim's Reset Voltages Suffix Table, and is confirmed in the Electrical Characteristics table under VTH parameter.
Does the MAX6412UK31+T support manual reset functionality?
Yes, the MAX6412UK31+T includes a dedicated MR (manual reset) input on Pin 3. It is active-low, features an internal 20kΩ pullup resistor, accepts minimum 1µs pulses, and provides 75ns glitch rejection. When MR is pulled low, the device asserts RESET for the full timeout period - enabling field service or user-initiated system reset without power cycling.
What package type and dimensions does the MAX6412UK31+T use?
The MAX6412UK31+T uses a lead-free SOT23-5 package (package code U5+2A), measuring 2.9mm × 1.6mm with 0.95mm pin pitch. Its land pattern matches JEDEC MO-178AA, and thermal resistance is θJA = 255.9°C/W on a multilayer PCB - verified in Maxim's Package Information section.
Can the MAX6412UK31+T operate reliably below 1.8V supply voltage?
Yes, the MAX6412UK31+T is fully specified down to VCC = 1.0V. Its RESET output remains valid (logic-low when asserted) for VCC ≥ 1V, and supply current drops to just 1.7µA typical at VCC ≤ 2.0V. This enables use in ultra-low-voltage battery-backed systems where other supervisors may fail to assert reset correctly.
How is the reset timeout period set on the MAX6412UK31+T?
The reset timeout period on the MAX6412UK31+T is set by connecting an external capacitor 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. For example, a 1500pF capacitor yields 3.00–5.75ms timeout, as validated in the Electrical Characteristics table.
MAX6412UK31+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:
- 3.075V
- 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
MAX6412UK31+T FAQ
1.How can I place an order for MAX6412UK31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK31+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 MAX6412UK31+T reliable?
The price and inventory of MAX6412UK31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK31+T is usually 5 days.
3.What payment methods are accepted for MAX6412UK31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6412UK31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6412UK31+T?
MAX6412UK31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK31+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 MAX6412UK31+T?
For technical support, including MAX6412UK31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK31+T requirements.
6.How does Aetrix verify that MAX6412UK31+T is sourced from the original manufacturer or authorized distributors?
All MAX6412UK31+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 MAX6412UK31+T meets industry standards.
7.What is the process for return or replacement of MAX6412UK31+T?
All MAX6412UK31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK31+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 MAX6412UK31+T part is unused and in its original packaging.
Return procedure for MAX6412UK31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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