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Analog Devices Inc./Maxim Integrated MAX6414UK38+T
- Part No.:
- MAX6414UK38+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK38+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,517
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Product details
Overview
MAX6414UK38+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 3.8V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in systems from 1.6V to 5V, asserts reset during brownout or manual trigger, and sustains reset for a capacitor-adjustable timeout period up to 5.75ms. Designed for automotive and industrial embedded controllers requiring reliable power-on reset and transient immunity.
For engineers reviewing the MAX6414UK38+T datasheet, MAX6414UK38+T pinout, MAX6414UK38+T application, or MAX6414UK38+T equivalent, key selection criteria include its 3.8V fixed threshold accuracy (±2.5% over -40°C to +125°C), 1.7µA typical quiescent current at 2V, guaranteed RESET validity down to VCC = 1V, open-drain output compatibility with mixed-voltage µP interfaces, and AEC-Q100-qualified variants.
Technical Context
The MAX6414UK38+T implements a precision bandgap-based voltage comparator for VCC monitoring with factory-trimmed 3.8V threshold and 4×VTH hysteresis (≈15.2mV). Its SRT pin hosts a 240nA constant-current source charging an external capacitor to generate a programmable reset timeout - not a fixed internal timer.
Reset assertion occurs when VCC falls below 3.8V (±2.5%), MR is pulled low, or both; deassertion requires VCC > 3.8V, MR high, and SRT capacitor ramping to 0.65V. The open-drain RESET output supports pull-up to voltages up to 6.0V, enabling interoperability with 1.8V, 3.3V, and 5V microprocessors without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.800V ±2.5% over -40°C to +125°C - ensures deterministic reset initiation across automotive temperature range |
| Quiescent Current | 1.7µA typ at VCC ≤ 2.0V - enables multi-year battery life in portable/low-power systems |
| Reset Timeout Range | 0.275ms to 5.75ms (CSRT = 0F to 1500pF) - supports µP initialization timing from fast-boot to safety-critical delay requirements |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface to any logic supply ≤6.0V |
| Operating Temp Range | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Supply Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
| MR Input Logic | CMOS-compatible with internal 20kΩ pullup - eliminates external components for basic manual reset implementation |
Pinout & Package
SOT23-5 package (U5+2A outline, RoHS-compliant, 5-pin surface-mount). Thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low; requires external pull-up; sinks 50µA @ VCC ≥ 1.0V with VOL ≤ 0.3V |
| 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 active input with 20kΩ internal pullup; 1µs minimum pulse width; 75ns glitch rejection |
| 4 - SRT | Set reset timeout capacitor terminal | 240nA constant-current source; connects to ground via CSRT to program tRP = (2.71×10⁶)×CSRT + 275µs |
| 5 - VCC | Supply voltage and monitored rail | Input for 3.8V threshold detection; also powers internal circuitry; valid operation from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise timing tuning (0.275–5.75ms) without trimming resistors or firmware changes |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during deep undervoltage events before µP power collapse |
| Power-supply transient immunity | Rejects VCC glitches ≤50µs duration when 100mV below threshold - prevents spurious resets in noisy environments |
| AEC-Q100 qualified variants available | Supports automotive applications requiring reliability validation per stress-test standard (e.g., MAX6414UK38/V+T) |
| Low-leakage SRT node design | Minimizes timing error from PCB leakage; requires <10nA capacitor (ceramic recommended) |
Applications
| Automotive Engine Control Unit (ECU) | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in engine management system exposed to load-dump transients and cold-crank brownouts. IC Role / Device Role / Timing Role: Provides fail-safe power-on reset and brownout detection; holds µP in reset until stable 3.3V rail is confirmed and timeout expires. Use Value: Prevents code execution errors during unstable power conditions; open-drain output interfaces directly to 3.3V µP reset pin with no level shifter needed. | Use Scenario: Ensures safe startup and fault recovery in battery-powered infusion pump with dual-rail (3.3V logic, 5V motor driver) architecture. IC Role / Device Role / Timing Role: Supervises primary 3.3V logic supply; manual reset allows clinician-initiated system reboot without power cycle. Use Value: 1.7µA quiescent current extends battery life; ±2.5% threshold tolerance ensures consistent reset point across temperature extremes encountered in clinical environments. |
| Industrial PLC I/O Module | Portable Test Instrument |
Use Scenario: Embedded in DIN-rail mounted programmable logic controller module operating in factory-floor environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Detects undervoltage on 5V backplane supply; asserts reset to ARM Cortex-M4 core during brownout recovery. Use Value: -40°C to +125°C rating matches industrial temperature requirements; SRT capacitor programming allows matching µP's required reset hold time (e.g., 4.375ms). | Use Scenario: Used in handheld oscilloscope with lithium-polymer battery and 1.8V/3.3V dual-domain SoC. IC Role / Device Role / Timing Role: Monitors 3.3V domain; open-drain RESET pulled up to 1.8V to meet SoC reset input logic thresholds. Use Value: Enables single-supervisor solution for mixed-voltage SoC interface; low ICC minimizes standby drain on battery during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V threshold; push-pull active-low RESET; 1.1µA IQ; no manual reset input | Lacks MR pin and adjustable timeout; better for ultra-low-IQ designs where 3.3V threshold suffices | Select if 3.3V threshold is acceptable and manual reset is unnecessary; verify µP reset input tolerates push-pull drive |
| ADM6315-38ARTZ-R7 | Fixed 3.8V threshold; open-drain RESET; 1.5µA IQ; no manual reset; no capacitor-adjustable timeout (fixed 200ms) | Provides fixed long timeout ideal for slow-start power supplies; lacks MR and SRT flexibility | Choose when predictable long-duration reset is required and manual intervention is not needed |
Compared with TPS3808G33DBVR and ADM6315-38ARTZ-R7, the MAX6414UK38+T uniquely combines 3.8V precision threshold, manual reset capability, capacitor-programmable timeout, and open-drain output - making it optimal for automotive and industrial designs requiring configurable, robust, and interface-flexible supervision.
Availability
MAX6414UK38+T is available at Aetrix Electronics and suitable for automotive ECUs, medical infusion pumps, industrial PLC modules, and portable test instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6414UK38+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 analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX6412–MAX6420 family was designed specifically for high-reliability microprocessor supervision in harsh environments - delivering precision voltage monitoring, flexible reset timing, and robust noise immunity for automotive, industrial, and medical systems.
FAQ
What is the exact reset threshold voltage of the MAX6414UK38+T?
The MAX6414UK38+T has a factory-trimmed VCC reset threshold of 3.800V, with ±1.25% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value is confirmed by Table 1 (suffix "38") and Electrical Characteristics section of the datasheet, where VTH = 3.705V (min), 3.800V (typ), 3.895V (max) at TA = -40°C to +125°C.
Does the MAX6414UK38+T support manual reset functionality?
Yes, the MAX6414UK38+T includes a dedicated MR (manual reset) input on Pin 3. Pulling MR low asserts the active-low RESET output for the full timeout period after release. It features an internal 20kΩ pullup resistor, allowing direct connection of a momentary switch to ground without external components. MR accepts logic-low pulses as short as 1µs with 75ns glitch rejection.
What type of reset output does the MAX6414UK38+T provide?
The MAX6414UK38+T provides an active-low open-drain RESET output on Pin 1. This allows the output to be pulled up to any voltage between 0V and 6.0V, enabling direct interface with microprocessors operating at 1.8V, 3.3V, or 5V logic levels without additional level-shifting circuitry. The output sinks 50µA with VOL ≤ 0.3V when VCC ≥ 1.0V.
How is the reset timeout period set on the MAX6414UK38+T?
The reset timeout period on the MAX6414UK38+T is set by connecting an external capacitor (CSRT) between Pin 4 (SRT) and ground. The timeout follows tRP = (2.71 × 10⁶) × CSRT + 275µs, yielding 0.275ms (CSRT = 0F) to 5.75ms (CSRT = 1500pF). Ceramic capacitors with leakage <10nA are recommended to maintain timing accuracy.
Is the MAX6414UK38+T qualified for automotive applications?
Yes - while the base MAX6414UK38+T is rated for -40°C to +125°C, AEC-Q100-qualified automotive versions exist (e.g., MAX6414UK38/V+T). These undergo additional stress testing per AEC-Q100 Rev H and are marked with "/V" suffix. The datasheet explicitly states "AEC-Q100 Qualified" in Benefits and Features and lists /V parts in Ordering Information.
MAX6414UK38+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.8V
- 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
MAX6414UK38+T FAQ
1.How can I place an order for MAX6414UK38+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK38+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 MAX6414UK38+T reliable?
The price and inventory of MAX6414UK38+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK38+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK38+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK38+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK38+T?
MAX6414UK38+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK38+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 MAX6414UK38+T?
For technical support, including MAX6414UK38+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK38+T requirements.
6.How does Aetrix verify that MAX6414UK38+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK38+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 MAX6414UK38+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK38+T?
All MAX6414UK38+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK38+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 MAX6414UK38+T part is unused and in its original packaging.
Return procedure for MAX6414UK38+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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