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Analog Devices Inc./Maxim Integrated MAX6419UK26+T
- Part No.:
- MAX6419UK26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK26+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,723
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Product details
Overview
MAX6419UK26+T from Maxim Integrated is a dual-voltage microprocessor supervisor IC with one factory-trimmed VCC reset threshold (2.625V ±2.5%) and one adjustable RESET IN input (1.26V threshold) for monitoring secondary supply rails. It features an active-high push-pull RESET output, capacitor-adjustable reset timeout (275µs to 5.75ms), manual reset capability via MR pin, and operates across -40°C to +125°C in automotive-grade SOT23-5 packaging. It is used in battery-powered controllers requiring reliable brownout detection and dual-rail system supervision.
For engineers reviewing the MAX6419UK26+T datasheet, MAX6419UK26+T pinout, MAX6419UK26+T application, or MAX6419UK26+T equivalent, key selection criteria include its 2.625V fixed VCC threshold, dual-input architecture, active-high push-pull output logic, 1.7µA typical quiescent current at 1.8V, and guaranteed reset validity down to VCC = 1V - critical for low-power embedded systems with multi-voltage domains.
Technical Context
The MAX6419UK26+T integrates two independent voltage monitoring paths: a laser-trimmed bandgap reference sets the fixed 2.625V VCC threshold, while a high-impedance comparator monitors RESET IN against a precise 1.26V internal reference - enabling external resistor-divider configuration for custom thresholds ≥1.26V. Reset assertion occurs if either input falls below its threshold or MR is pulled low.
Reset deassertion is controlled by an internal 240nA current source charging an external capacitor on the SRT pin; the resulting ramp to 0.65V determines the timeout period (tRP = 2.71×10⁶ × CSRT + 275µs). The active-high push-pull RESET output drives logic-high during normal operation and pulls low only during reset, ensuring compatibility with µP reset inputs requiring active-low assertion when inverted externally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed VCC Threshold | 2.625V ±2.5% over -40°C to +125°C - ensures accurate power-rail monitoring without external components |
| Adjustable Input Threshold | 1.26V ±33mV hysteresis - enables precise dual-rail supervision via external resistor divider |
| Reset Timeout Range | 275µs to 5.75ms (with 0–1500pF SRT capacitor) - supports diverse µP reset timing requirements |
| Quiescent Current | 1.7µA typical at VCC = 1.8V - minimizes battery drain in portable and automotive applications |
| Operating Temperature | -40°C to +125°C - meets AEC-Q100 Grade 0 requirements for under-hood automotive use |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up and simplifies interface to µP reset pins |
| VCC Validity Limit | Guaranteed RESET logic valid down to VCC = 1V - ensures deterministic behavior during deep brownout |
Pinout & Package
SOT23-5 package (5-pin, 2.9mm × 1.6mm × 1.1mm body, 0.95mm pitch), RoHS-compliant, lead-free (+T suffix), thermal resistance θJA = 255.9°C/W (multi-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull reset output | Drives high during normal operation; pulls low for reset duration - directly interfaces µP reset input without pull-up |
| 2 - GND | Ground reference | Common return path for all internal circuits and external capacitor (SRT) |
| 3 - RESET IN | Adjustable voltage monitor input | High-impedance node (10nA leakage) for external resistor-divider - sets secondary rail threshold ≥1.26V |
| 4 - SRT | Reset timeout capacitor connection | 240nA precision current source charges external capacitor - determines reset hold time with ±15% tolerance |
| 5 - VCC | Supply and primary voltage monitor input | Monitors 1.0V–5.5V supply; powers internal circuitry and enables reset assertion when falling below 2.625V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of main VCC (2.625V) and secondary rail (via RESET IN) prevents false resets from single-rail faults |
| Capacitor-programmable reset timeout | Enables precise, application-specific reset hold times (275µs–5.75ms) without trimming resistors or firmware changes |
| Manual reset input (MR) | Internal 20kΩ pull-up allows momentary switch-to-ground implementation - no external components required |
| Low-power operation | 1.7µA typical ICC at 1.8V enables >10-year battery life in coin-cell-powered IoT sensors and telematics modules |
| AEC-Q100 qualified | Validated for automotive applications including engine control units and ADAS domain controllers operating at 125°C junction temperature |
Applications
| Automotive Engine Control Unit (ECU) | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Monitors 5V main supply and 3.3V MCU core rail in harsh under-hood environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting active-high RESET to ARM Cortex-M7 during VCC brownout or secondary rail collapse. Use Value: Prevents erratic MCU execution during transient load dumps by holding reset for ≥4ms until both rails stabilize above thresholds. | Use Scenario: Ensures fail-safe restart of safety-critical pump motor controller after battery swap or low-battery condition. IC Role / Device Role / Timing Role: Supervises 3.6V Li-ion battery output and 1.8V sensor ADC supply; triggers manual reset via nurse button. Use Value: Guarantees deterministic state recovery with <1.7µA quiescent draw - extends disposable battery life beyond 18 months. |
| Industrial PLC I/O Module | Portable Test Equipment |
Use Scenario: Detects undervoltage on isolated 24V field bus and 5V logic rail in factory automation cabinets with high ambient temperatures. IC Role / Device Role / Timing Role: Dual-input supervisor with SRT capacitor set to 5ms timeout - coordinates safe shutdown of analog front-end and digital logic. Use Value: Eliminates need for separate supervisors per rail, reducing BOM count and PCB area by 40% vs. discrete solutions. | Use Scenario: Powers up handheld oscilloscope with dual 3.3V FPGA and 1.2V DDR3 memory rails from USB-C PD source. IC Role / Device Role / Timing Role: Monitors VCC (3.3V) and RESET IN (1.2V rail via divider) - asserts RESET until both rails settle within 100ms. Use Value: Prevents FPGA configuration failure by enforcing minimum 3.5ms reset hold time aligned with DDR3 tINIT specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6420UK26+T | Same 2.625V fixed threshold and adjustable RESET IN, but features open-drain RESET output instead of push-pull | Requires external pull-up resistor; supports mixed-voltage logic interfacing (e.g., 5V µP with 3.3V supply) | Select when level-shifting or wired-OR reset bus functionality is needed |
| TPS3808G33DBVR | Fixed 3.3V threshold only; no adjustable input; 300ms fixed timeout; 2.5µA ICC | Single-rail monitoring only; lacks dual-supply flexibility and capacitor-adjustable timing | Choose only for cost-sensitive, single-rail applications where timing is non-critical |
Compared with MAX6420UK26+T, the MAX6419UK26+T eliminates external pull-up components and reduces layout complexity; versus TPS3808G33DBVR, it provides essential dual-rail supervision and programmable reset timing - making it uniquely suited for modern multi-voltage embedded systems requiring design flexibility and automotive reliability.
Availability
MAX6419UK26+T is available at Aetrix Electronics and suitable for automotive ECUs, medical infusion pumps, industrial PLC modules, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6419UK26+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 engineered specifically for robust, low-power microprocessor supervision in multi-rail systems - emphasizing capacitor-adjustable timing, dual-threshold monitoring, and AEC-Q100 compliance for mission-critical embedded control.
FAQ
What is the exact fixed reset threshold voltage of the MAX6419UK26+T?
The MAX6419UK26+T has a factory-trimmed fixed VCC reset threshold of 2.625V, with ±2.5% accuracy over the full -40°C to +125°C operating temperature range. This value is confirmed in the Electrical Characteristics table and corresponds to the "26" suffix in the part number per the Reset Voltages Suffix Table. The MAX6419UK26+T uses laser-trimmed resistors to achieve this precision without external calibration.
How does the adjustable RESET IN input work on the MAX6419UK26+T?
The RESET IN pin on the MAX6419UK26+T connects to a high-impedance comparator referenced to a precise 1.26V internal threshold. To monitor a secondary voltage (e.g., 1.8V or 3.3V), an external resistor divider is connected between VCC and GND, with the center tap feeding RESET IN. The MAX6419UK26+T datasheet provides the formula VMON_TH = 1.26V × (R1 + R2)/R2 to calculate required resistor values, enabling supervision of any voltage ≥1.26V.
What is the function of the SRT pin on the MAX6419UK26+T?
The SRT pin on the MAX6419UK26+T accepts an external capacitor to set the reset timeout period. An internal 240nA current source charges this capacitor; when the voltage reaches 0.65V, the reset signal deasserts. The timeout follows tRP = (2.71 × 10⁶) × CSRT + 275µs, supporting programmable delays from 275µs to 5.75ms. Ceramic capacitors with <10nA leakage are recommended for accuracy in the MAX6419UK26+T application.
Does the MAX6419UK26+T support manual reset functionality?
Yes, the MAX6419UK26+T supports manual reset via its MR pin (Pin 3 in the SOT23-5 package). Pulling MR low asserts RESET for the full timeout period after release. The device includes an internal 20kΩ pull-up resistor, so the pin can be left unconnected if unused. For implementation, a normally open momentary switch between MR and GND provides field-serviceable reset capability without external components in the MAX6419UK26+T design.
Is the MAX6419UK26+T qualified for automotive applications?
Yes, the MAX6419UK26+T is AEC-Q100 qualified for automotive use. Its -40°C to +125°C operating temperature range, robust power-supply transient immunity, and guaranteed reset validity down to VCC = 1V meet Grade 0 requirements. The "+" in the "+T" suffix indicates RoHS-compliant, lead-free packaging, and the device is specified for use in engine control units, body electronics, and ADAS modules where reliability under extreme conditions is mandatory for the MAX6419UK26+T.
MAX6419UK26+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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.625V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6419UK26+T FAQ
1.How can I place an order for MAX6419UK26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK26+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 MAX6419UK26+T reliable?
The price and inventory of MAX6419UK26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK26+T is usually 5 days.
3.What payment methods are accepted for MAX6419UK26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK26+T?
MAX6419UK26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK26+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 MAX6419UK26+T?
For technical support, including MAX6419UK26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK26+T requirements.
6.How does Aetrix verify that MAX6419UK26+T is sourced from the original manufacturer or authorized distributors?
All MAX6419UK26+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 MAX6419UK26+T meets industry standards.
7.What is the process for return or replacement of MAX6419UK26+T?
All MAX6419UK26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK26+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 MAX6419UK26+T part is unused and in its original packaging.
Return procedure for MAX6419UK26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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