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Analog Devices Inc./Maxim Integrated MAX6414UK44-T
- Part No.:
- MAX6414UK44-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK44-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,383
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Product details
Overview
MAX6414UK44-T from Maxim Integrated is a low-power, single-voltage microprocessor reset supervisor IC with factory-trimmed 4.375V VCC reset threshold, active-low open-drain RESET output, manual reset input (MR), and capacitor-adjustable reset timeout delay. It monitors VCC from 1.6V to 5V, asserts reset on undervoltage or MR assertion, and holds reset for a user-defined period after recovery. Used in battery-powered controllers and embedded systems requiring precise brownout protection.
For engineers reviewing the MAX6414UK44-T datasheet, MAX6414UK44-T pinout, MAX6414UK44-T application, or MAX6414UK44-T equivalent, key selection criteria include its 4.375V fixed threshold accuracy (±2.5% over –40°C to +125°C), 1.7µA typical quiescent current, guaranteed RESET validity down to VCC = 1V, and SOT23-5 open-drain output compatibility with mixed-supply µP interfaces.
Technical Context
The MAX6414UK44-T implements a precision bandgap-based voltage comparator for VCC monitoring and a high-impedance manual reset input with internal 20kΩ pullup. Its reset timeout is set by an external capacitor (CSRT) charging via a 240nA current source to a 0.65V internal reference - enabling programmable delays from 275µs to >100ms.
It features power-supply transient immunity validated up to 100mV overdrive with ≤50µs glitch rejection, hysteresis of 4×VTH (≈17.5mV at 4.375V), and operates across –40°C to +125°C with full specification. The open-drain RESET output supports logic-level translation up to 5.5V, decoupling µP reset signaling from VCC domain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.375V (factory-trimmed, ±2.5% over temperature) - sets precise brownout detection point for 4.5V nominal rails |
| Quiescent Current | 1.7µA (typ at +25°C) - enables multi-year operation in coin-cell–powered devices |
| Reset Timeout Range | 275µs to >100ms (capacitor-adjustable via SRT pin) - supports µP initialization timing from fast-boot to complex firmware load sequences |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface to µPs with different supply voltages (0–5.5V) |
| VCC Validity Range | Guaranteed RESET functionality down to VCC = 1V - ensures reliable reset assertion during deep brownout conditions |
| MR Input Characteristics | Internal 20kΩ pullup; 1µs minimum pulse width - eliminates need for external pullup or debounce circuitry in most applications |
Pinout & Package
Package: SOT23-5, surface-mount, RoHS-compliant, 5-pin plastic package with 1.3mm × 2.9mm footprint and 1.45mm height.
| 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 | Primary return path for all internal circuits and reset timing current source |
| 3 - MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC (20kΩ); no external components required |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA constant-current source charges CSRT to 0.65V reference |
| 5 - VCC | Supply voltage and monitored rail | Powers device and serves as primary voltage monitor input (4.375V threshold) |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise, application-specific reset hold times without firmware or external logic |
| Factory-trimmed 4.375V threshold | Eliminates resistor-divider design effort and tolerance stack-up for 4.5V system rails |
| 1.7µA typical supply current | Reduces battery drain in always-on monitoring applications such as smart sensors and IoT endpoints |
| Open-drain RESET with 5.5V tolerance | Permits direct interfacing to µPs powered from 1.8V, 3.3V, or 5V supplies using a single shared pullup |
| –40°C to +125°C operation | Supports deployment in automotive engine control units and industrial motor drives without derating |
Applications
| Automotive Body Control Module | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 5V supply rail in door module ECU during cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset when VCC drops below 4.375V; holds reset for 20ms after recovery to ensure MCU stable boot. Use Value: Prevents erratic MCU behavior during battery voltage sag; open-drain output interfaces directly to 3.3V microcontroller reset pin. | Use Scenario: Ensures reliable startup of ARM Cortex-M4-based vital signs processor powered by Li-ion battery (3.0–4.2V range). IC Role / Device Role / Timing Role: Supervises regulated 4.5V intermediate rail; manual reset input used for clinician-initiated system reboot. Use Value: 1.7µA quiescent current extends battery life between calibrations; guaranteed RESET validity down to VCC = 1V prevents false releases during deep discharge. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Detects undervoltage on isolated 5V auxiliary supply feeding FPGA configuration memory. IC Role / Device Role / Timing Role: Provides clean, glitch-immune reset signal with 50µs transient rejection; SRT capacitor set for 100ms timeout to cover FPGA reconfiguration sequence. Use Value: Hysteresis (17.5mV) prevents chatter near threshold; operating range to +125°C suits enclosed cabinet environments. | Use Scenario: Monitors backup supercapacitor voltage (nominal 4.5V) during AC mains failure to trigger secure data save before shutdown. IC Role / Device Role / Timing Role: Acts as voltage detector and timed reset generator; open-drain output pulls low to initiate EEPROM write cycle upon brownout. Use Value: Capacitor-adjustable timeout aligns precisely with flash write duration; low leakage (<1µA) preserves supercap energy during long standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK44D3+T | Fixed 4.38V threshold, 3.5ms factory-fixed timeout, push-pull active-low RESET | No manual reset input; no timeout adjustability; higher ICC (2.5µA) | Select when deterministic, fixed-duration reset is preferred and MR functionality is unnecessary |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms factory-fixed timeout, open-drain RESET, 1.1µA ICC | Lower threshold; no MR pin; not rated for +125°C operation (max +85°C) | Select for cost-sensitive, lower-voltage applications where extended temperature range is not required |
Compared with MAX6414UK44-T, MAX6316LUK44D3+T offers simpler implementation but sacrifices timeout flexibility and MR capability, while TPS3808G33DBVR provides ultra-low current but lacks high-temp qualification and 4.375V threshold precision for 4.5V rails.
Availability
MAX6414UK44-T is available at Aetrix Electronics and suitable for automotive body control modules, portable medical monitors, industrial PLC I/O modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6414UK44-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 computing applications.
The MAX6412–MAX6420 family delivers configurable, low-power µP supervision with flexible reset thresholds and timeout programming - targeting battery-operated and high-reliability embedded systems needing robust power-rail monitoring.
FAQ
What is the exact VCC reset threshold voltage for MAX6414UK44-T?
The MAX6414UK44-T has a factory-trimmed VCC reset threshold of 4.375V, 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 "44" corresponds to 4.375V) and verified in the Electrical Characteristics table under "VCC Reset Threshold Accuracy". The MAX6414UK44-T uses laser-trimmed resistors to achieve this precision without external components.
Does MAX6414UK44-T support manual reset functionality?
Yes, the MAX6414UK44-T includes a dedicated MR (manual reset) input on Pin 3. A logic-low pulse on MR asserts the active-low RESET output for the full capacitor-programmed timeout period, even if VCC remains above threshold. The pin features an internal 20kΩ pullup resistor, so it may be left floating if unused. The MAX6414UK44-T datasheet specifies a minimum MR pulse width of 1µs and guarantees glitch rejection of 75ns transients.
How is the reset timeout period set on MAX6414UK44-T?
The reset timeout period on MAX6414UK44-T is set by connecting an external capacitor (CSRT) between Pin 4 (SRT) and ground. The timeout tRP (in seconds) follows tRP = (2.71 × 10⁶) × CSRT + 275µs. For example, a 1500pF capacitor yields ~4.375ms. The SRT pin sources a precise 240nA current to charge CSRT to a 0.65V internal reference - making timing highly predictable and temperature-stable per the Typical Operating Characteristics graphs.
What is the function of the open-drain RESET output on MAX6414UK44-T?
Pin 1 of the MAX6414UK44-T is an active-low open-drain RESET output, meaning it can only sink current (pull low) and requires an external pullup resistor to define the high state. This architecture allows the MAX6414UK44-T to drive reset lines on microprocessors powered from different supply voltages (e.g., 1.8V, 3.3V, or 5V), as the output is rated to 5.5V. The MAX6414UK44-T's open-drain design supports wired-OR configurations and simplifies level-shifting without additional logic.
Is MAX6414UK44-T specified for operation at 125°C?
Yes, the MAX6414UK44-T is fully specified from –40°C to +125°C, including all electrical parameters such as reset threshold accuracy (±2.5%), supply current (1.7µA typ), and reset timeout stability. This rating is explicitly stated in the Ordering Information table and Absolute Maximum Ratings section. The device uses BiCMOS process technology and undergoes production testing across temperature, making it suitable for under-hood automotive and high-temperature industrial applications where the MAX6414UK44-T must remain functional and reliable.
MAX6414UK44-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:
- 4.375V
- 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
MAX6414UK44-T FAQ
1.How can I place an order for MAX6414UK44-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK44-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 MAX6414UK44-T reliable?
The price and inventory of MAX6414UK44-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK44-T is usually 5 days.
3.What payment methods are accepted for MAX6414UK44-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK44-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK44-T?
MAX6414UK44-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK44-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 MAX6414UK44-T?
For technical support, including MAX6414UK44-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK44-T requirements.
6.How does Aetrix verify that MAX6414UK44-T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK44-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 MAX6414UK44-T meets industry standards.
7.What is the process for return or replacement of MAX6414UK44-T?
All MAX6414UK44-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK44-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 MAX6414UK44-T part is unused and in its original packaging.
Return procedure for MAX6414UK44-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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