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Analog Devices Inc./Maxim Integrated MAX6414UK27+T
- Part No.:
- MAX6414UK27+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK27+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,266
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Product details
Overview
MAX6414UK27+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.7V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in battery-powered controllers and embedded systems, asserts reset during brownout or power-up, and uses an external capacitor on SRT to set timeout (3.0–5.75ms typical). Operating from -40°C to +125°C, it guarantees valid reset down to VCC = 1V.
For engineers reviewing the MAX6414UK27+T datasheet, MAX6414UK27+T pinout, MAX6414UK27+T application, or MAX6414UK27+T equivalent, this page delivers verified electrical specs, SOT23-5 package details, real-world use cases for automotive and medical equipment, and two validated alternative parts with documented functional and interface differences.
Technical Context
The MAX6414UK27+T implements a precision bandgap-based voltage comparator for VCC monitoring at 2.700V ±2.5% over temperature, paired with a high-impedance MR input featuring 20kΩ internal pullup. Its reset timeout is generated by a 240nA current source charging an external capacitor on SRT, referenced to a 0.65V internal threshold.
It features an open-drain RESET output rated to sink 3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V), with leakage <1.0µA when deasserted. The device supports logic-level interfacing to µPs operating at voltages up to 5.5V via external pullup, and provides guaranteed reset validity down to VCC = 1V without requiring external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.700V ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges |
| Reset Timeout Period | 3.00–5.75ms with 1500pF SRT capacitor - programmable delay prevents premature µP release during unstable power ramp-up |
| Supply Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered portable instrumentation |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and level-shifting to µP I/O rails up to 5.5V |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and high-reliability industrial control applications |
| Manual Reset Input | MR with 20kΩ internal pullup - eliminates external resistor for momentary switch implementation; 1µs minimum pulse width |
| Reset Validity Range | Guaranteed RESET logic validity down to VCC = 1V - ensures deterministic behavior during deep brownout conditions |
Pinout & Package
SOT23-5 package (U5+2A outline, RoHS-compliant, 5-pin surface-mount) with 1.3mm × 2.9mm footprint and 0.95mm height. 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 pullup to target logic rail; sinks up to 3.2mA at VCC ≥ 4.5V |
| 2 - GND | Ground reference | Primary return path for internal comparators and current sources; must be low-impedance connection |
| 3 - MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC (20kΩ); 75ns glitch rejection |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA constant-current source charges CSRT to 0.65V threshold |
| 5 - VCC | Supply voltage and monitored rail | Input for fixed-threshold VCC supervision; operates from 1.0V to 5.5V; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tailoring of reset hold time (e.g., 3.0–5.75ms with 1500pF) to match specific µP power-ramp requirements |
| Fixed 2.7V reset threshold | Laser-trimmed accuracy (±2.5% over temp) eliminates calibration effort for 2.7V system rails in battery-backed devices |
| Open-drain RESET with wide voltage tolerance | Supports direct interface to 1.8V, 3.3V, or 5V µP reset inputs using appropriate external pullup, avoiding level translators |
| Low quiescent current (1.7µA typ) | Minimizes battery drain in always-on portable medical sensors and remote IoT nodes |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset state during deep undervoltage events without external pulldown resistors |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Monitors 2.7V backup power rail in ECU during cold-crank transients where battery voltage dips below 6V. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to ARM Cortex-M7 MCU until stable 2.7V is restored post-cranking. Use Value: Prevents code corruption during sub-100ms brownouts by holding reset for ≥3ms after VCC exceeds 2.7V, leveraging capacitor-programmable timeout. | Use Scenario: Supervises coin-cell–powered microcontroller in handheld glucose meter during battery depletion. IC Role / Device Role / Timing Role: Detects falling VCC below 2.7V and asserts open-drain RESET to MSP430F5xx, interfaced via 3.3V pullup. Use Value: 1.7µA supply current extends CR2032 battery life beyond 2 years; guaranteed reset validity to VCC = 1V avoids undefined MCU state at end-of-life. |
| Industrial PLC I/O Module | Smart Energy Meter MCU Subsystem |
Use Scenario: Ensures clean startup of dual-core RISC-V processor in DIN-rail mounted PLC after AC/DC converter power-up. IC Role / Device Role / Timing Role: Generates reset pulse synchronized to 2.7V auxiliary rail stabilization, with MR pin used for firmware-triggered watchdog recovery. Use Value: Manual reset input (MR) with 20kΩ internal pullup simplifies field-service recovery; 125°C rating supports convection-cooled enclosures. | Use Scenario: Supervises metrology SoC supply in ANSI C12.22–compliant smart meter exposed to outdoor temperature extremes. IC Role / Device Role / Timing Role: Monitors 2.7V LDO output feeding metrology ADC and RF transceiver; asserts RESET during grid-sag events. Use Value: -40°C to +125°C operation and ±2.5% threshold accuracy ensure compliance with ANSI C12.20 thermal drift limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6414UK27-T | Same die, leaded (Pb) packaging instead of lead-free (+T suffix); identical electrical specs and SOT23-5 footprint | No difference in function or performance; not suitable for RoHS-compliant production | Select MAX6414UK27-T only for legacy repair or non-RoHS prototyping |
| TPS3808G27DBVR | Fixed 2.7V threshold, push-pull active-low RESET, 1.6µA ICC, but no MR input; uses internal timer (no SRT capacitor) | Lacks manual reset capability and externally adjustable timeout; simpler layout but less flexible timing control | Choose TPS3808G27DBVR when MR and programmable timeout are unnecessary and board space is constrained |
Compared with MAX6414UK27+T, MAX6414UK27-T offers identical functionality in leaded packaging for legacy use, while TPS3808G27DBVR trades MR input and capacitor-adjustable timeout for lower component count and smaller solution size-making it suitable for cost-sensitive, fixed-timing applications.
Availability
MAX6414UK27+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6414UK27+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 medical applications.
The MAX6412–MAX6420 family was developed to provide ultra-low-power, temperature-stable microprocessor supervision with flexible reset timing and multiple voltage-monitoring configurations for safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6414UK27+T and how accurate is it over temperature?
The MAX6414UK27+T has a factory-trimmed VCC reset threshold of 2.700V, with ±1.25% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This specification is laser-trimmed and guaranteed per the datasheet's Electrical Characteristics table, ensuring reliable detection of 2.7V rail brownouts in automotive and industrial environments where voltage tolerances are tight.
How do I calculate the SRT capacitor value needed for a 4.5ms reset timeout with MAX6414UK27+T?
Use the formula CSRT = (tRP − 275µs) / 2.71 × 10⁶, where tRP is in seconds. For 4.5ms (0.0045s): CSRT = (0.0045 − 0.000275) / 2,710,000 ≈ 1560pF. A standard 1500pF ceramic capacitor yields 4.375ms typical timeout per the datasheet, meeting most µP requirements. Ensure the capacitor is low-leakage (<10nA) and placed close to the SRT pin.
Can MAX6414UK27+T interface directly with a 1.8V microcontroller reset input?
Yes. The MAX6414UK27+T's open-drain RESET output can interface directly with a 1.8V µP reset input by connecting an external pullup resistor to the 1.8V rail. The datasheet confirms RESET output voltage HIGH (VOH) reaches 0.8 × VCC when sourcing 1µA - well above the 1.8V µP's VIH threshold. No level shifter is required, simplifying design and reducing BOM count.
Does MAX6414UK27+T include a manual reset input, and what are its key electrical characteristics?
Yes, MAX6414UK27+T includes a dedicated MR (manual reset) input. It features an internal 20kΩ pullup resistor, accepts logic-low pulses as short as 1µs, rejects glitches under 75ns, and introduces only 20ns delay from MR deassertion to RESET deassertion. This enables robust field-service reset using a simple momentary switch without external debounce components.
Is MAX6414UK27+T qualified for automotive applications, and what evidence supports this?
MAX6414UK27+T is not explicitly automotive-qualified; only variants with "/V" suffix (e.g., MAX6414UK27/V+T) are AEC-Q100 qualified. The +T suffix indicates RoHS-compliant lead-free packaging and operation from -40°C to +125°C, but does not imply automotive qualification. For automotive use, specify the /V+T version - MAX6414UK27+T is intended for industrial and medical applications requiring extended temperature range and high reliability.
MAX6414UK27+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:
- 2.7V
- 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
MAX6414UK27+T FAQ
1.How can I place an order for MAX6414UK27+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK27+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 MAX6414UK27+T reliable?
The price and inventory of MAX6414UK27+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK27+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK27+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK27+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK27+T?
MAX6414UK27+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK27+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 MAX6414UK27+T?
For technical support, including MAX6414UK27+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK27+T requirements.
6.How does Aetrix verify that MAX6414UK27+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK27+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 MAX6414UK27+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK27+T?
All MAX6414UK27+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK27+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 MAX6414UK27+T part is unused and in its original packaging.
Return procedure for MAX6414UK27+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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