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Analog Devices Inc./Maxim Integrated MAX6413UK31-T
- Part No.:
- MAX6413UK31-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6413UK31-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,400
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Product details
Overview
MAX6413UK31-T from Maxim Integrated is a low-power, single-voltage microprocessor reset supervisor IC with factory-trimmed 3.075V VCC reset threshold, active-high push-pull RESET output, manual reset input (MR), and capacitor-adjustable reset timeout delay. It monitors supply voltage from 1.6V to 5V, asserts reset during brownout or power-up, and holds reset for a user-defined period after recovery. Used in automotive ECUs and battery-powered controllers requiring reliable power-on reset at extended temperature.
For engineers reviewing the MAX6413UK31-T datasheet, MAX6413UK31-T pinout, MAX6413UK31-T application, or MAX6413UK31-T equivalent, this page delivers verified electrical parameters, SOT23-5 package details, reset timing behavior under -40°C to +125°C operation, and real-world dual-supply monitoring alternatives - all grounded in Maxim's official MAX6412–MAX6420 family documentation.
Technical Context
The MAX6413UK31-T implements a precision bandgap-based voltage comparator for VCC monitoring with ±1.25% threshold accuracy at +25°C and ±2.5% over -40°C to +125°C. Its internal 240nA current source charges an external capacitor on the SRT pin to generate a programmable reset timeout, with tRP = (2.71 × 10⁶) × CSRT + 275µs.
It features a 20kΩ internal MR pullup resistor, 75ns glitch rejection on MR, and guaranteed RESET validity down to VCC = 1V. The active-high push-pull RESET output drives up to 800µA high (VOH ≥ 0.8×VCC) and sinks 3.2mA low (VOL ≤ 0.4V at VCC ≥ 4.5V), enabling direct interface to most µP reset inputs without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.075V nominal (suffix "31"), ±2.5% over full temperature range - ensures reliable reset assertion before µP operational voltage margin is violated |
| Supply Current | 1.7µA typical at +25°C - enables multi-year battery life in portable and automotive always-on modules |
| Reset Timeout Range | 275µs to >100ms via 0–10nF SRT capacitor - supports short boot validation or long firmware initialization sequences |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial control, and medical equipment deployment |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and ensures fast, rail-to-rail logic transition into µP reset pin |
| MR Input Behavior | Logic-low asserted, 1µs minimum pulse width, 20ns MR-to-RESET delay - compatible with mechanical switches and digital logic without debounce circuitry |
| Reset Validity Voltage | Guaranteed RESET functionality down to VCC = 1V - maintains deterministic reset state during deep brownout conditions |
Pinout & Package
MAX6413UK31-T is housed in a 5-pin SOT23-5 package (package code U5-2), with 1.6mm × 2.9mm footprint, 0.95mm height, and lead-free RoHS-compliant construction. Pin 1 is marked with a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull reset output | Drives µP reset pin high during fault; transitions low after timeout - no external pullup required |
| 2 - GND | Ground reference | Return path for internal comparators, current source, and output stage; must connect to system ground plane |
| 3 - MR | Manual reset input | Pulled internally to VCC via 20kΩ; assert reset by grounding - supports momentary switch or FPGA GPIO |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA constant current charges CSRT to 0.65V to define timeout |
| 5 - VCC | Supply voltage and monitored rail | Power source and primary voltage monitor input; operates from 1.0V to 5.5V with reset valid down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise, application-specific reset hold time (275µs–100ms+) without trimming resistors or firmware changes |
| Factory-trimmed VCC threshold | 3.075V ±2.5% over -40°C to +125°C eliminates calibration effort and improves batch consistency |
| Low quiescent current | 1.7µA typical allows integration into always-on subsystems without compromising battery runtime |
| Power-supply transient immunity | Rejects <50µs negative VCC glitches down to 100mV below threshold - prevents spurious resets in noisy environments |
| Manual reset with internal pullup | 20kΩ MR pullup enables switch-only implementation; no external resistor needed for basic reset button function |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply during cold-crank battery dip (down to 6V system). IC Role / Device Role / Timing Role: Asserts active-high RESET when VCC falls below 3.075V; holds for 20ms to ensure µP completes safe shutdown before power collapse. Use Value: Prevents corrupted flash writes and undefined state during 12V battery transients - meets ISO 7637-2 Pulse 4 immunity requirements. |
Use Scenario: Supervises 1.8V SoC supply in battery-powered infusion controller with 10-year shelf life. IC Role / Device Role / Timing Role: Provides power-on reset with 100ms timeout to allow LDO stabilization and clock lock before firmware execution. Use Value: 1.7µA supply current extends primary Li-SOCl₂ battery life beyond specification; -40°C start-up capability ensures field reliability. |
| Industrial PLC I/O Module | Smart Energy Meter MCU |
Use Scenario: Guards 5V logic rails in DIN-rail mounted controller exposed to 8kV ESD and conducted noise. IC Role / Device Role / Timing Role: Detects brownout on main 5V rail and asserts RESET within 100µs; MR pin tied to watchdog timer output for fail-safe recovery. Use Value: 75ns MR glitch rejection prevents false resets from ESD-induced noise; push-pull output drives multiple µP reset pins in parallel. |
Use Scenario: Ensures deterministic startup of metrology SoC after meter wake-up from deep sleep (VCC = 3.0V). IC Role / Device Role / Timing Role: Monitors 3.0V rail with 3.075V threshold to catch marginal supply conditions before ADC calibration begins. Use Value: ±2.5% threshold accuracy over temperature avoids premature reset during thermal cycling - critical for Class 0.2 meter certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6412UK31-T | Active-low push-pull RESET output; identical VCC threshold, SRT timing, and MR functionality | Requires inverted reset logic on µP side or level-shifting circuitry | Select when target µP accepts active-low reset and board layout already accommodates pullup-free drive |
| MAX6419UK31-T | Dual-monitor variant: adds adjustable RESET IN input (1.26V threshold) for secondary voltage supervision | Supports simultaneous monitoring of VCC and auxiliary rail (e.g., 1.2V core); increases BOM count by one resistor divider | Choose when system requires independent reset assertion on both main and auxiliary supplies - adds design flexibility at minor cost premium |
Compared with MAX6412UK31-T, the MAX6413UK31-T simplifies µP interface by eliminating external pullup needs; versus MAX6419UK31-T, it reduces component count and layout area where only single-rail monitoring is required - making it optimal for cost-sensitive, space-constrained automotive and portable designs.
Availability
MAX6413UK31-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, industrial PLC modules, smart energy meters, and battery-powered embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6413UK31-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6412–MAX6420 product line delivers ultra-low-power, configurable reset supervisors optimized for harsh-environment applications where supply voltage integrity and deterministic reset timing are mission-critical.
FAQ
What is the exact VCC reset threshold voltage for MAX6413UK31-T?
The MAX6413UK31-T has a factory-trimmed VCC reset threshold of 3.075V nominal, with ±1.25% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value corresponds to suffix "31" in Table 1 of the datasheet and is laser-trimmed during production to ensure tight tolerance without external calibration.
How do I calculate the reset timeout period for MAX6413UK31-T?
Use the formula tRP = (2.71 × 10⁶) × CSRT + 275µs, where tRP is in seconds and CSRT is in farads. For example, a 1500pF capacitor yields ~4.375ms timeout. The SRT pin must connect to a low-leakage ceramic capacitor referenced to GND; stray capacitance or probe loading will degrade accuracy.
Does MAX6413UK31-T support manual reset functionality?
Yes, MAX6413UK31-T includes a dedicated MR (manual reset) pin with an internal 20kΩ pullup resistor. Driving MR low for ≥1µs asserts RESET high; reset remains asserted for the full timeout period after MR returns high. No external components are needed - a simple SPST switch from MR to GND suffices.
Can MAX6413UK31-T operate reliably at VCC = 1.2V?
Yes, MAX6413UK31-T guarantees valid RESET output functionality down to VCC = 1.0V. At 1.2V, the active-high push-pull output maintains VOH ≥ 0.8×VCC and VOL ≤ 0.3V under specified load conditions, ensuring robust logic-level compatibility with low-voltage µPs during brownout recovery.
What package type and footprint does MAX6413UK31-T use?
MAX6413UK31-T uses a 5-pin SOT23-5 package (Maxim package code U5-2), with 1.6mm × 2.9mm body size, 0.95mm max height, and 0.95mm pin pitch. Land pattern #90-0174 is recommended; the device is available in both leaded and lead-free variants - specify "+T" instead of "-T" for RoHS-compliant ordering.
MAX6413UK31-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:
- 3.075V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6413UK31-T FAQ
1.How can I place an order for MAX6413UK31-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6413UK31-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 MAX6413UK31-T reliable?
The price and inventory of MAX6413UK31-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6413UK31-T is usually 5 days.
3.What payment methods are accepted for MAX6413UK31-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6413UK31-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6413UK31-T?
MAX6413UK31-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6413UK31-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 MAX6413UK31-T?
For technical support, including MAX6413UK31-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6413UK31-T requirements.
6.How does Aetrix verify that MAX6413UK31-T is sourced from the original manufacturer or authorized distributors?
All MAX6413UK31-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 MAX6413UK31-T meets industry standards.
7.What is the process for return or replacement of MAX6413UK31-T?
All MAX6413UK31-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6413UK31-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 MAX6413UK31-T part is unused and in its original packaging.
Return procedure for MAX6413UK31-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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