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Analog Devices Inc./Maxim Integrated MAX6419UK50
- Part No.:
- MAX6419UK50
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK50.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:448
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Product details
Overview
MAX6419UK50 from Maxim Integrated is a low-power microprocessor reset supervisor IC with capacitor-adjustable reset timeout, active-low open-drain RESET output, and factory-trimmed 5.0V reset threshold. It monitors VCC from 1.6V to 5V, asserts reset below threshold, holds reset for user-defined timeout (275µs to >600ms), and guarantees valid operation down to VCC = 1V. It is used in battery-powered controllers and critical µP monitoring where precise power-on reset timing and low quiescent current are required.
For engineers reviewing the MAX6419UK50 datasheet, MAX6419UK50 pinout, MAX6419UK50 application, or MAX6419UK50 equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative parts - all grounded in Maxim's official documentation and electrical specifications.
Technical Context
The MAX6419UK50 implements a precision voltage monitor with laser-trimmed internal reference and a 240nA constant-current ramp source tied to the SRT pin. Reset assertion occurs when VCC falls below the 5.0V ±2.5% threshold; deassertion requires both VCC rise above threshold and external capacitor (CSRT) charging to 0.65V.
Its open-drain RESET output supports wired-OR configuration and logic-level interfacing across supplies up to 5.5V, while its 1.6µA typical supply current and immunity to transients <50µs (at 100mV overdrive) enable robust operation in portable and automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 5.00V ±2.5% (factory-trimmed suffix '50'); ensures reliable reset initiation at nominal system rail |
| Quiescent Current | 1.6µA typical at +25°C; enables multi-year battery life in always-on monitoring applications |
| Reset Timeout Range | 275µs (CSRT = 0) to >600ms (CSRT = 100nF); adjustable via external capacitor for µP boot-time alignment |
| VCC Operating Range | 1.0V to 5.5V; guarantees functional reset assertion/deassertion even during deep brownout |
| RESET Output Type | Active-low open-drain; allows level-shifting, wired-OR with auxiliary reset sources, and pullup to any supply ≤5.5V |
| Transient Immunity | No reset issued for VCC glitches ≤50µs duration when falling 100mV below threshold; prevents false resets in noisy environments |
| Temperature Range | -40°C to +125°C; qualified for automotive and industrial ambient conditions |
Pinout & Package
MAX6419UK50 is packaged in a 5-pin SOT23-5 (U5+2) surface-mount package with exposed pad option not specified; footprint matches standard 5-lead SOT23 land pattern (Maxim land pattern no. 90-0174).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and SRT ramp current sink |
| 2 | RESET | Active-low open-drain output; requires external pullup resistor (10kΩ–100kΩ) to define high state |
| 3 | N.C. | No internal connection; may be tied to GND per layout best practice but has no functional role |
| 4 | VCC | Supply input and monitored voltage rail; powers device and sets reset threshold detection point |
| 5 | SRT | Set-reset-time input; connects to external capacitor (CSRT) to program timeout period via 240nA ramp current |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise matching to µP boot time without firmware or hardware revision - tRP = 2.73×10⁶ × CSRT + 275µs |
| Open-drain RESET with 5.5V tolerance | Permits direct interface to µPs operating at different I/O voltages (e.g., 1.8V, 3.3V, or 5V logic) using a single pullup |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during slow power-down or weak-battery conditions before system collapse |
| Low-leakage SRT pin architecture | Minimizes timeout drift from PCB leakage or stray capacitance - requires short, isolated trace routing |
| Factory-trimmed 5.0V threshold (suffix '50') | Eliminates external resistor divider; achieves ±2.5% accuracy over -40°C to +125°C without calibration |
Applications
| Battery-Powered Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: A handheld medical meter uses coin-cell power and must guarantee clean µP startup after button-press wake-up. IC Role / Device Role / Timing Role: MAX6419UK50 monitors VCC during wake-up surge, asserts RESET until stable 5V rail is confirmed and µP firmware initializes. Use Value: 1.6µA quiescent current preserves battery life; capacitor-adjustable timeout aligns precisely with µP's 100ms boot sequence. |
Use Scenario: A BCM detects ignition-on transition and must initialize CAN communication stack without race conditions. IC Role / Device Role / Timing Role: MAX6419UK50 provides synchronized reset to MCU and peripheral ASICs after 5V supply stabilizes post-ignition bounce. Use Value: -40°C to +125°C rating ensures reliability; open-drain output enables shared reset bus with other automotive ICs. |
| Industrial Sensor Nodes | Set-Top Box Power Sequencing |
|
Use Scenario: A wireless temperature node sleeps for hours, then wakes to sample and transmit - requiring glitch-free restart. IC Role / Device Role / Timing Role: MAX6419UK50 guards against brownout during RF transmission surge by holding RESET until VCC recovers fully. Use Value: Immunity to 50µs VCC transients prevents spurious resets; 5.0V threshold matches regulated sensor supply rail. |
Use Scenario: An STB powers multiple rails (1.2V core, 3.3V I/O, 5V analog) and requires controlled release of main processor reset. IC Role / Device Role / Timing Role: MAX6419UK50 monitors the final 5V rail and releases RESET only after all converters settle and CSRT times out. Use Value: Adjustable timeout replaces fixed-delay RC networks; SOT23-5 footprint simplifies layout in space-constrained chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP302HSN50T1G | Fixed 5.0V threshold, 200ms factory-set timeout, push-pull output, 1.5µA ICC | Lacks capacitor-adjustable timeout and open-drain flexibility; requires PCB change for wired-OR or level-shifted reset | Select when timeout stability > adjustability and board area is constrained - no external capacitor needed |
| TLV803EB50DBZR | 5.0V threshold, 140ms min timeout, open-drain output, 0.5µA ICC, SOT23-3 package | Smaller 3-pin footprint but no SRT pin - timeout is fixed; lower ICC benefits ultra-low-power designs | Choose for minimal footprint and lowest current where fixed delay suffices and no external timing cap is desired |
Compared with MAX6419UK50, NCP302HSN50T1G trades timeout adjustability for guaranteed consistency and push-pull drive strength, while TLV803EB50DBZR reduces size and current at the cost of design flexibility - making MAX6419UK50 optimal when system boot timing varies or multi-voltage reset coordination is required.
Availability
MAX6419UK50 is available at Aetrix Electronics and suitable for battery-powered controllers, automotive body control modules, and industrial sensor nodes requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6419UK50 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 MAX64xx series was developed specifically for low-power microprocessor supervision in space- and energy-constrained systems, emphasizing voltage accuracy, timeout flexibility, and wide-temperature reliability.
FAQ
What is the exact reset threshold voltage of MAX6419UK50?
The MAX6419UK50 features a factory-trimmed reset threshold of 5.00V with ±2.5% accuracy over the full -40°C to +125°C temperature range. This value is defined by the '50' suffix per Table 1 in the datasheet and does not require external components to achieve specification-grade accuracy.
How do I calculate the reset timeout period for MAX6419UK50?
For MAX6419UK50, the reset timeout period (tRP) is calculated as tRP = (2.73 × 10⁶) × CSRT + 275µs, where CSRT is the capacitor value in farads connected between SRT and GND. For example, a 1500pF capacitor yields ~4.375ms timeout - verified in the Electrical Characteristics table under "Reset Timeout Period".
Does MAX6419UK50 support wired-OR reset configurations?
Yes, MAX6419UK50 supports wired-OR reset because its RESET pin is an active-low open-drain output. Multiple MAX6419UK50 devices or other open-drain reset sources (e.g., watchdog timers) can share a common RESET line with a single pullup resistor, enabling system-wide reset coordination without additional logic.
What is the minimum VCC required for MAX6419UK50 to assert a valid RESET signal?
MAX6419UK50 guarantees valid RESET assertion and deassertion down to VCC = 1.0V. Below this, output drive capability degrades significantly. The device remains functional and monitors VCC across its full 1.0V–5.5V range, ensuring deterministic behavior during brownout recovery.
Which package type does MAX6419UK50 use, and what are its key mechanical identifiers?
MAX6419UK50 uses the 5-pin SOT23-5 package (Maxim package code U5+2, outline 21-0057). It has a standard SOT23 footprint with pin 1 marked by a dot or beveled edge, and matches land pattern 90-0174 - compatible with automated pick-and-place and reflow processes.
MAX6419UK50 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 5V, 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
MAX6419UK50 FAQ
1.How can I place an order for MAX6419UK50 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK50 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 MAX6419UK50 reliable?
The price and inventory of MAX6419UK50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK50 is usually 5 days.
3.What payment methods are accepted for MAX6419UK50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK50?
MAX6419UK50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK50 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 MAX6419UK50?
For technical support, including MAX6419UK50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK50 requirements.
6.How does Aetrix verify that MAX6419UK50 is sourced from the original manufacturer or authorized distributors?
All MAX6419UK50 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 MAX6419UK50 meets industry standards.
7.What is the process for return or replacement of MAX6419UK50?
All MAX6419UK50 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK50, 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 MAX6419UK50 part is unused and in its original packaging.
Return procedure for MAX6419UK50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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