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Analog Devices Inc./Maxim Integrated MAX6414UK26+T
- Part No.:
- MAX6414UK26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,094
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Product details
Overview
MAX6414UK26+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.625V 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). Designed for automotive-grade operation from –40°C to +125°C.
For engineers reviewing the MAX6414UK26+T datasheet, MAX6414UK26+T pinout, MAX6414UK26+T application, or MAX6414UK26+T equivalent, key selection criteria include its 2.625V factory-trimmed threshold accuracy (±2.5% over temperature), 1.7µA typical quiescent current at 2V, guaranteed RESET validity down to VCC = 1V, and SOT23-5 open-drain output compatibility with mixed-voltage µP interfaces.
Technical Context
This device implements a precision bandgap-based voltage comparator for VCC monitoring and a high-impedance manual reset input with internal 20kΩ pullup. Reset assertion is triggered by VCC falling below 2.625V (±2.5%), MR low, or both - and remains asserted for a capacitor-programmable timeout after recovery.
The open-drain RESET output supports logic-level translation via external pullup to voltages up to 5.5V, enabling interface with µPs operating at different supply rails. The SRT pin sources a precise 240nA ramp current to charge an external capacitor; reset deassertion occurs when the capacitor voltage reaches 0.65V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.625V 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 applications |
| Reset Timeout Period | 3.00–5.75ms with 1500pF SRT capacitor - provides sufficient hold time for slow-ramping µP power supplies |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and level-shifting with external pullup to 1.8V/3.3V/5V |
| Supply Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout (down to 1V) |
| Manual Reset Input | Internal 20kΩ pullup, 1µs minimum pulse width - eliminates need for external components in pushbutton reset implementation |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
SOT23-5 package (U5+2A outline, RoHS-compliant, 5-pin surface-mount) with 1.3mm × 2.9mm footprint and 0.95mm height - compatible with standard automated PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low; requires external pullup; sinks ≥500µA at VCC ≥ 2.7V |
| 2 - GND | Ground reference | Return path for all internal circuitry and SRT capacitor discharge |
| 3 - MR | Manual reset input | Logic-low active; internally pulled up to VCC (20kΩ); 75ns glitch rejection |
| 4 - SRT | Set reset timeout input | 240nA constant-current source; connects to capacitor-to-ground to program timeout period |
| 5 - VCC | Supply voltage and monitored rail | Powers device and serves as primary reset trigger source; valid operation from 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed VCC threshold | 2.625V ±2.5% over full temperature range - eliminates calibration effort in production |
| Capacitor-adjustable timeout | Programmable 0.275ms to >100ms using 0–10nF capacitor on SRT - supports diverse µP startup timing requirements |
| Open-drain RESET with wide voltage tolerance | RESET pin rated to 6.0V - enables direct connection to 5V, 3.3V, or 1.8V µP reset inputs via appropriate pullup |
| Ultra-low supply current | 1.7µA typical at 2V - extends battery life in portable medical and sensor nodes |
| Power-supply transient immunity | Rejects <50µs negative transients of 100mV amplitude - prevents false resets during EMI events |
Applications
| Automotive Body Control Module | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in door module exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises VCC and asserts open-drain RESET to hold µP in reset until stable; timeout set to 4.375ms for safe boot sequence. Use Value: Prevents erratic firmware execution during battery voltage sag; AEC-Q100 qualification ensures reliability in harsh automotive environment. |
Use Scenario: Powers-on and validates 1.8V sensor interface rail in handheld diagnostic device powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Detects VCC rise above 2.625V and holds RESET low for capacitor-set delay before releasing µP. Use Value: Enables deterministic startup with <2µA quiescent draw - extends single-cell battery life beyond 2 years in standby mode. |
| Industrial PLC I/O Expansion Card | Smart Energy Meter MCU Supervisor |
Use Scenario: Ensures clean reset of ARM Cortex-M4 on modular I/O board subjected to 24V field wiring transients. IC Role / Device Role / Timing Role: Provides MR-triggered reset via front-panel button and monitors 5V logic rail; open-drain output interfaces to 3.3V µP. Use Value: Manual reset capability simplifies field service; 125°C rating supports convection-cooled enclosures without derating. |
Use Scenario: Supervises dual-rail system where 3.3V µP and 2.5V metrology ADC require coordinated reset during AC mains dropout. IC Role / Device Role / Timing Role: Uses MR input to synchronize reset across subsystems; RESET output drives shared reset bus with 10kΩ pullup to 3.3V. Use Value: Guarantees atomic restart of measurement and communication stacks - critical for ANSI C12.20 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6414UK26-T | Same electrical specs and pinout, but leaded (Pb) packaging instead of lead-free (+T suffix) | Not suitable for RoHS-compliant production; requires Pb-compatible reflow profile | Select MAX6414UK26-T only for legacy repair or non-RoHS programs |
| TPS3808G26DBVR | Fixed 2.63V threshold, 1.6µA IQ, push-pull RESET, same SOT23-5 package | Lacks manual reset input and open-drain flexibility; requires redesign if wired-OR or level-shift needed | Choose TPS3808G26DBVR only when push-pull output suffices and TI supply chain preference applies |
Compared with MAX6414UK26+T, the MAX6414UK26-T offers identical performance in leaded packaging but violates modern environmental compliance standards, while the TPS3808G26DBVR trades open-drain versatility and MR functionality for marginally lower quiescent current - making MAX6414UK26+T optimal for mixed-voltage, serviceable, and RoHS-mandated designs.
Availability
MAX6414UK26+T is available at Aetrix Electronics and suitable for automotive body control modules, portable medical devices, industrial PLC expansion cards, and smart energy meter designs requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6414UK26+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 - emphasizing low power, high reliability, and extended temperature operation.
The MAX6412–MAX6420 family delivers configurable µP supervision with capacitor-adjustable timing, targeting cost-sensitive yet robust embedded systems where supply monitoring and deterministic reset behavior are critical.
FAQ
What is the exact reset threshold voltage of MAX6414UK26+T?
The MAX6414UK26+T features a factory-trimmed VCC reset threshold of 2.625V, with ±1.25% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed in the Electrical Characteristics table and corresponds to the "26" suffix per the Reset Voltages Suffix Table in the datasheet.
Does MAX6414UK26+T support manual reset functionality?
Yes, MAX6414UK26+T includes a dedicated MR (manual reset) input on Pin 3 with internal 20kΩ pullup to VCC. Asserting MR low for ≥1µs triggers reset, which remains active for the full capacitor-programmed timeout period after MR is released - enabling simple pushbutton reset without external components.
Can MAX6414UK26+T be used with a 1.8V microcontroller?
Yes, MAX6414UK26+T supports 1.8V µPs via its open-drain RESET output: connect an external pullup resistor (e.g., 10kΩ) from RESET to the µP's 1.8V supply. The device itself operates down to VCC = 1.0V and guarantees valid RESET output down to that level, ensuring compatibility across mixed-voltage systems.
What capacitor value sets a 4.375ms reset timeout for MAX6414UK26+T?
A 1500pF capacitor on the SRT pin (Pin 4) yields a nominal 4.375ms reset timeout for MAX6414UK26+T, as specified in the Electrical Characteristics table under "Reset Timeout Period" with CSRT = 1500pF. The relationship is linear: tRP = (2.71 × 10⁶) × CSRT + 275µs, so 1500pF gives tRP ≈ 4.375ms.
Is MAX6414UK26+T qualified for automotive applications?
MAX6414UK26+T is specified for –40°C to +125°C operation and is listed in the Ordering Information as available in /V automotive-qualified variants (e.g., MAX6414UK26/V+T). While the base MAX6414UK26+T meets the temperature and reliability requirements, formal AEC-Q100 qualification applies only to /V-suffixed versions - confirm part number suffix with your distributor for automotive use.
MAX6414UK26+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:
- 2.625V
- 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
MAX6414UK26+T FAQ
1.How can I place an order for MAX6414UK26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK26+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 MAX6414UK26+T reliable?
The price and inventory of MAX6414UK26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK26+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK26+T?
MAX6414UK26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK26+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 MAX6414UK26+T?
For technical support, including MAX6414UK26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK26+T requirements.
6.How does Aetrix verify that MAX6414UK26+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK26+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 MAX6414UK26+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK26+T?
All MAX6414UK26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK26+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 MAX6414UK26+T part is unused and in its original packaging.
Return procedure for MAX6414UK26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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