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Analog Devices Inc./Maxim Integrated MAX6414UK31
- Part No.:
- MAX6414UK31
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK31.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,454
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Product details
Overview
MAX6414UK31 from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 3.075V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in battery-powered and automotive systems, asserts reset when VCC drops below threshold or MR is pulled low, and maintains reset for a capacitor-adjustable timeout period (275µs to >5ms). Designed for operation from -40°C to +125°C, it draws only 1.7µA typical at VCC ≤ 2.0V.
For engineers reviewing the MAX6414UK31 datasheet, MAX6414UK31 pinout, MAX6414UK31 application, or MAX6414UK31 equivalent, this page delivers verified electrical parameters, SOT23-5 package layout, automotive-grade AEC-Q100 qualification status, open-drain logic interface capability, and precise reset timeout design guidance using the SRT pin and external capacitor.
Technical Context
The MAX6414UK31 implements a precision bandgap-based voltage comparator for VCC monitoring with ±2.5% threshold accuracy over -40°C to +125°C and 4mV hysteresis. Its internal 240nA current source charges an external capacitor on the SRT pin to generate a programmable reset timeout delay, with timing governed by tRP = (2.71 × 10⁶) × CSRT + 275µs.
It features a dedicated manual reset input (MR) with 20kΩ internal pullup, glitch rejection of 75ns, and MR-to-RESET delay of 20ns. The open-drain RESET output supports logic-level translation up to 5.5V and sinks ≥50µA at VCC ≥ 1.0V with VOL ≤ 0.3V, enabling direct interfacing with diverse µP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.075V nominal (suffix '31'), ±2.5% over full temperature range - ensures reliable brownout detection at defined system rail level |
| Supply Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered applications |
| Reset Timeout Range | 275µs (CSRT = 0) to 5.75ms (CSRT = 1500pF) - supports µP initialization timing across wide range of processors |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration and level-shifting to higher-voltage logic domains |
| VCC Monitoring Range | 1.0V to 5.5V - guarantees valid reset assertion down to brownout levels while supporting 1.8V/3.3V/5V systems |
| AEC-Q100 Grade | Qualified per /V+T ordering suffix - meets automotive reliability and stress-test requirements |
Pinout & Package
SOT23-5 package (5-pin, 2.9mm × 1.6mm × 1.1mm), RoHS-compliant, tape-and-reel delivery. Pin 1 marked with dot; top view orientation matches standard SOT23 pinout convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low; requires external pullup; compatible with 0–5.5V logic domains |
| 2 - GND | Ground reference | Return path for all internal circuitry; must be low-impedance connection to system ground plane |
| 3 - MR | Manual reset input | Logic-low assertion triggers reset; internal 20kΩ pullup allows NC use; 1µs minimum pulse width |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA ramp current sets tRP; sensitive to leakage and stray capacitance |
| 5 - VCC | Supply voltage and monitored rail input | Powers device and provides primary reset trigger; valid operation from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tailoring of reset duration (275µs–5.75ms) without firmware changes or BOM variants |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout conditions before system power collapse |
| Power-supply transient immunity | Rejects <50µs negative VCC transients down to 100mV below threshold - prevents false resets in noisy environments |
| AEC-Q100 qualified (/V+T variant) | Validated for automotive applications including engine control, ADAS sensors, and infotainment power management |
| Low quiescent current (1.7µA typ) | Minimizes battery drain in always-on monitoring circuits - critical for portable and remote IoT nodes |
Applications
| Automotive Engine Control Unit (ECU) | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in under-hood ECU exposed to thermal cycling and load dump transients. IC Role / Device Role / Timing Role: Provides fail-safe reset assertion during VCC brownout or manual service reset; timeout set to 4.375ms to satisfy ISO 16750-2 cold-crank timing. Use Value: AEC-Q100 qualification and -40°C to +125°C operation ensure reliability; open-drain output interfaces directly to 5V CAN controller reset line. |
Use Scenario: Supervises battery-backed 1.8V ARM Cortex-M4 in portable infusion pump requiring >10-year shelf life. IC Role / Device Role / Timing Role: Detects VCC drop below 3.075V during battery depletion; asserts reset before data corruption occurs; timeout configured for 2.5ms. Use Value: 1.7µA typical ICC extends battery life; guaranteed reset down to VCC = 1V prevents undefined µP state during final discharge phase. |
| Industrial PLC I/O Module | Smart Energy Meter MCU |
Use Scenario: Ensures deterministic restart of 3.3V FPGA-based I/O processor after AC mains interruption or watchdog timeout. IC Role / Device Role / Timing Role: Acts as primary power-on reset generator and secondary brownout detector; MR pin connected to front-panel reset button. Use Value: Manual reset input with 20kΩ internal pullup eliminates external components; SOT23-5 footprint saves PCB area in space-constrained modules. |
Use Scenario: Monitors dual-rail power (3.3V MCU + 5V metrology ADC) in ANSI C12.20–compliant meter with tamper-detection circuitry. IC Role / Device Role / Timing Role: Provides VCC supervision only (MAX6414 variant); RESET output tied to µP reset and hardware tamper latch enable. Use Value: Open-drain output allows shared reset bus with other subsystems; ±2.5% threshold accuracy meets metering calibration stability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6414UK30/V+T | Fixed 3.000V reset threshold (±2.5%), identical SOT23-5 package and pinout | Suitable where exact 3.0V trip point required instead of 3.075V; same automotive qualification | Select MAX6414UK30/V+T if system VCC nominal is precisely 3.0V and margin analysis shows tighter threshold tolerance needed. |
| TLV803EB30DBZR | 3.0V fixed threshold, push-pull active-low RESET, 1.6µA ICC, SOT23-3 package (no MR pin) | Lacks manual reset input and capacitor-adjustable timeout; smaller footprint but less flexible timing control | Choose TLV803EB30DBZR only for cost-sensitive, space-constrained designs where MR and adjustable timeout are unnecessary. |
Compared with MAX6414UK30/V+T, the MAX6414UK31 offers a 75mV higher threshold for improved noise margin in 3.3V systems near dropout; versus TLV803EB30DBZR, it adds MR functionality and programmable timeout at the cost of one extra pin and slightly higher ICC.
Availability
MAX6414UK31 is available at Aetrix Electronics and suitable for automotive ECUs, medical infusion pumps, and industrial PLC I/O modules requiring stable component supply with AEC-Q100 assurance and long-term production continuity.
Supply support for MAX6414UK31 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 low power, high reliability, and robust performance.
The MAX6412–MAX6420 family delivers configurable µP reset supervision with capacitor-adjustable timing, targeting battery-powered, automotive, and safety-critical embedded systems needing guaranteed power-on and brownout reset behavior.
FAQ
What is the exact reset threshold voltage of the MAX6414UK31?
The MAX6414UK31 has a factory-trimmed nominal VCC reset threshold of 3.075V, with ±2.5% accuracy over the full -40°C to +125°C operating temperature range. This value is confirmed in Table 1 of the datasheet (suffix '31') and applies specifically to the MAX6414UK31, not the broader MAX6414 family. The threshold is referenced to the VCC pin and includes 4mV hysteresis to prevent chatter near the trip point.
Does the MAX6414UK31 support manual reset functionality?
Yes, the MAX6414UK31 includes a dedicated MR (manual reset) input on pin 3. Pulling MR low asserts the RESET output for the full timeout period, even if VCC remains above threshold. The device integrates a 20kΩ internal pullup resistor, so MR may be left unconnected if manual reset is unused. Minimum MR pulse width is 1µs, with 75ns glitch rejection and 20ns propagation delay to RESET.
How is the reset timeout period set on the MAX6414UK31?
The reset timeout period on the MAX6414UK31 is set by connecting an external capacitor between the SRT pin (pin 4) 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 4.375ms typical timeout. Ceramic capacitors with leakage <10nA are recommended to maintain timing accuracy.
Is the MAX6414UK31 qualified for automotive applications?
Yes, the MAX6414UK31/V+T variant is AEC-Q100 qualified for automotive use. The '/V+T' suffix in the ordering code explicitly denotes automotive qualification, with testing performed across -40°C to +125°C and compliance to stress-test requirements for humidity, temperature cycling, and mechanical shock. Standard MAX6414UK31-T parts are not automotive-qualified.
What is the function of the open-drain RESET output on the MAX6414UK31?
The MAX6414UK31 features an active-low open-drain RESET output (pin 1) that sinks current when asserted and floats when deasserted. This allows connection to external pullup resistors tied to different voltage domains (0–5.5V), enabling level translation and wired-OR reset bus configurations. It supports ≥50µA sink current at VCC ≥ 1.0V with VOL ≤ 0.3V, ensuring compatibility with diverse µP reset inputs.
MAX6414UK31 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:
- Open Drain or Open Collector
- 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
MAX6414UK31 FAQ
1.How can I place an order for MAX6414UK31 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK31 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 MAX6414UK31 reliable?
The price and inventory of MAX6414UK31 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK31 is usually 5 days.
3.What payment methods are accepted for MAX6414UK31?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK31 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK31?
MAX6414UK31 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK31 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 MAX6414UK31?
For technical support, including MAX6414UK31 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK31 requirements.
6.How does Aetrix verify that MAX6414UK31 is sourced from the original manufacturer or authorized distributors?
All MAX6414UK31 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 MAX6414UK31 meets industry standards.
7.What is the process for return or replacement of MAX6414UK31?
All MAX6414UK31 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK31, 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 MAX6414UK31 part is unused and in its original packaging.
Return procedure for MAX6414UK31:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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