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Analog Devices Inc./Maxim Integrated MAX6419UK16+T
- Part No.:
- MAX6419UK16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK16+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,790
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Product details
Overview
MAX6419UK16+T from Maxim Integrated is a dual-voltage microprocessor supervisor IC with one factory-trimmed VCC reset threshold (1.575V nominal) and one adjustable RESET IN input for monitoring secondary voltages down to 1.26V. It features an active-high push-pull RESET output, capacitor-adjustable reset timeout (275µs to 5.75ms), 1.7µA typical quiescent current, and operates from -40°C to +125°C in automotive-grade SOT23-5 packaging. It is used in battery-powered controllers to ensure reliable power-up sequencing and brownout recovery.
For engineers reviewing the MAX6419UK16+T datasheet, MAX6419UK16+T pinout, MAX6419UK16+T application, or MAX6419UK16+T equivalent, key selection criteria include its dual-threshold architecture, guaranteed RESET validity down to VCC = 1V, AEC-Q100 qualification (per /V suffix variants), and precise 240nA SRT ramp current for stable timeout programming.
Technical Context
The MAX6419UK16+T implements dual independent voltage monitoring: a laser-trimmed internal comparator for VCC (1.575V ±2.5% over temperature) and an external resistor-divider–based comparator on RESET IN (1.26V threshold, adjustable up to 5V). Its reset assertion logic triggers when either voltage falls below its respective threshold or MR is asserted - though MR is not present on MAX6419 variants.
Reset deassertion is governed by a precision 240nA current source charging an external capacitor at SRT; the resulting ramp must reach 0.65V to terminate the timeout period. The active-high push-pull RESET output delivers rail-to-rail drive capability (VOH ≥ 0.8×VCC, VOL ≤ 0.4V at 3.2mA sink) and supports valid logic states down to VCC = 1V without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.575V ±2.5% over -40°C to +125°C - sets primary supply monitoring point with guaranteed hysteresis |
| RESET IN Threshold | 1.26V fixed reference - enables external resistor-divider to monitor secondary voltages as low as 1.26V |
| Quiescent Current | 1.7µA typical at VCC ≤ 2.0V - ensures minimal battery drain in always-on monitoring applications |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0F to 1500pF) - externally programmable via capacitor for µP-specific reset timing compliance |
| SRT Ramp Current | 240nA ±20% - defines linear capacitor charging rate for accurate, temperature-stable timeout calibration |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive and industrial embedded environments |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up resistors and supports direct µP reset input interface |
Pinout & Package
SOT23-5 package (U5+2A outline), 5-pin surface-mount, 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 µP reset input high during fault condition; remains high for full timeout after recovery |
| 2 - GND | Ground reference | Common return path for all internal comparators, current sources, and output stage |
| 3 - RESET IN | Adjustable reset threshold input | High-impedance node for external resistor-divider; monitors secondary voltage (e.g., I/O rail, analog supply) |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA current source charges CSRT to generate precise delay |
| 5 - VCC | Supply voltage and fixed-threshold monitor input | Powers device and feeds internal VCC comparator; valid operation from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage monitoring | Simultaneously supervises main supply (VCC) and secondary rail (via RESET IN) - critical for multi-rail SoC systems |
| Capacitor-adjustable timeout | 275µs–5.75ms range set by single external capacitor - avoids fixed-delay limitations of non-programmable supervisors |
| Guaranteed RESET validity to VCC = 1V | Active-high push-pull output remains functional even during deep brownout - prevents undefined µP state |
| Low leakage RESET IN input | 10nA max input leakage - enables use of MΩ-range divider resistors without threshold error |
| AEC-Q100 qualified variants | /V suffix versions meet automotive stress testing requirements - suitable for ADAS and body electronics |
Applications
| Battery-Powered Medical Monitor | Automotive Body Control Module |
|---|---|
Use Scenario: Continuous monitoring of main 3.3V logic rail and isolated 2.5V sensor supply in portable ECG unit. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserts RESET if either rail drops below spec; timeout ensures µP completes boot sequence before releasing reset. Use Value: Prevents corrupted firmware execution during partial battery discharge while enabling compact, low-power design with no manual reset button. | Use Scenario: Supervising 5V MCU supply and 12V lamp driver rail in door module with CAN communication. IC Role / Device Role / Timing Role: Monitors VCC (5V) and scaled-down 12V rail (via R-divider on RESET IN); generates clean reset pulse during ignition cycling. Use Value: Eliminates need for two discrete supervisors; AEC-Q100-compatible variants support automotive qualification without redesign. |
| Industrial PLC I/O Card | Smart Energy Meter |
Use Scenario: Ensuring deterministic startup of ARM Cortex-M4 controller and isolated RS-485 transceiver supply. IC Role / Device Role / Timing Role: Uses fixed 3.0V threshold on VCC and adjustable 3.3V threshold on RESET IN to coordinate dual-domain power-up. Use Value: Guarantees synchronized reset release across logic and interface domains, preventing bus contention or latch-up. | Use Scenario: Monitoring 3.3V microcontroller supply and 1.8V real-time clock backup rail in meter with supercapacitor hold-up. IC Role / Device Role / Timing Role: Detects brownout on main supply and undervoltage on RTC rail; extends reset assertion until both recover. Use Value: Preserves timekeeping integrity and prevents flash corruption during grid fluctuations - meets IEC 62053 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6418UK16+T | Active-low push-pull RESET output; identical dual-threshold architecture and timing specs | Requires inverted reset logic on µP side; incompatible with active-high-only reset inputs | Select when target µP accepts only active-low reset assertion |
| TLV803EB26DBVR | Single-threshold (2.63V), no adjustable input; 350ms fixed timeout; SOT23-5 package | Lacks dual-rail monitoring capability; unsuitable for systems requiring secondary voltage supervision | Choose only for cost-sensitive, single-rail applications where adjustable timeout and dual monitoring are unnecessary |
Compared with MAX6418UK16+T, MAX6419UK16+T provides native compatibility with active-high reset µPs without level-shifting; versus TLV803EB26DBVR, it enables flexible dual-supply monitoring and precise timeout tuning - essential for complex embedded systems.
Availability
MAX6419UK16+T is available at Aetrix Electronics and suitable for automotive body electronics, battery-powered medical instruments, industrial PLC I/O cards, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6419UK16+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 ultra-low-power, temperature-stable microprocessor supervision with flexible threshold and timing configurations - engineered specifically for reliability-critical embedded systems operating in harsh environments.
FAQ
What is the exact VCC reset threshold voltage for MAX6419UK16+T?
The MAX6419UK16+T has a factory-trimmed VCC reset threshold of 1.575V nominal, with tolerance of ±1.25% at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value is laser-trimmed during production and confirmed in the Electrical Characteristics table of the official MAX6412–MAX6420 datasheet. The '16' suffix directly references this 1.575V threshold per the Reset Voltages Suffix Table.
Does MAX6419UK16+T include a manual reset (MR) input?
No, the MAX6419UK16+T does not include a manual reset (MR) input. Per the Selector Guide and Pin Description sections, MR is only present on MAX6412/MAX6413/MAX6414 variants. The MAX6419UK16+T provides dual monitoring via VCC and RESET IN pins only, with reset assertion triggered solely by voltage faults on those inputs - not by an external push-button signal.
How is the reset timeout period calculated for MAX6419UK16+T?
The reset timeout period tRP for MAX6419UK16+T is calculated using tRP = (2.71 × 10⁶) × CSRT + 275µs, where tRP is in seconds and CSRT is in farads. For example, a 1500pF capacitor yields tRP ≈ 4.375ms (typical). This formula derives from the 240nA SRT ramp current charging CSRT to the 0.65V internal reference voltage, as documented in the Typical Operating Circuit and Electrical Characteristics sections.
Can MAX6419UK16+T monitor a 12V supply?
Yes, MAX6419UK16+T can monitor a 12V supply using the RESET IN pin with an external resistor divider. The internal RESET IN comparator has a fixed 1.26V threshold, so a divider network (e.g., R1 = 8.5MΩ, R2 = 1MΩ) scales 12V down to 1.26V at RESET IN. The device's 10nA max input leakage ensures minimal error, and the absolute maximum rating for RESET IN (VCC + 0.3V) is satisfied when VCC ≥ 1.6V - verified in the Absolute Maximum Ratings table.
Is MAX6419UK16+T qualified for automotive applications?
The MAX6419UK16+T itself is not explicitly automotive-qualified; however, Maxim offers /V-suffixed variants (e.g., MAX6419UK16/V+T) that are AEC-Q100 qualified for automotive use. The base MAX6419UK16+T shares the same SOT23-5 package, -40°C to +125°C operating range, and electrical specifications, but formal AEC-Q100 test reports and qualification documentation apply only to parts ordered with the /V suffix, as stated in the Ordering Information section.
MAX6419UK16+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:
- 1.575V, 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
MAX6419UK16+T FAQ
1.How can I place an order for MAX6419UK16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK16+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 MAX6419UK16+T reliable?
The price and inventory of MAX6419UK16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK16+T is usually 5 days.
3.What payment methods are accepted for MAX6419UK16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK16+T?
MAX6419UK16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK16+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 MAX6419UK16+T?
For technical support, including MAX6419UK16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK16+T requirements.
6.How does Aetrix verify that MAX6419UK16+T is sourced from the original manufacturer or authorized distributors?
All MAX6419UK16+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 MAX6419UK16+T meets industry standards.
7.What is the process for return or replacement of MAX6419UK16+T?
All MAX6419UK16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK16+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 MAX6419UK16+T part is unused and in its original packaging.
Return procedure for MAX6419UK16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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