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Analog Devices Inc./Maxim Integrated MAX6419UK46+T
- Part No.:
- MAX6419UK46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK46+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:21,610
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Product details
Overview
MAX6419UK46+T from Maxim Integrated is a dual-voltage microprocessor supervisor IC with one factory-trimmed VCC reset threshold (4.625V, ±2.5%) and one adjustable RESET IN input (1.26V threshold), active-high push-pull RESET output, capacitor-adjustable reset timeout (275µs to 5.75ms), and 1.7µA typical quiescent current. It monitors critical power rails in automotive ECUs and battery-powered industrial controllers.
For engineers reviewing the MAX6419UK46+T datasheet, MAX6419UK46+T pinout, MAX6419UK46+T application, or MAX6419UK46+T equivalent, key selection criteria include its dual-threshold architecture, guaranteed RESET validity down to VCC = 1V, AEC-Q100 qualification (per /V variants), SOT23-5 package compatibility, and capacitor-programmable timeout for flexible μP boot sequencing.
Technical Context
The MAX6419UK46+T implements two independent voltage monitoring paths: a laser-trimmed bandgap reference sets the fixed 4.625V VCC threshold with ±2.5% accuracy over –40°C to +125°C, while an internal 1.26V comparator enables external resistor-divider programming of the RESET IN threshold down to 1.26V. Its active-high push-pull RESET output drives logic-high during normal operation and asserts low only during fault conditions.
A precision 240nA current source charges the external SRT capacitor to generate the reset timeout delay; deassertion occurs when the ramp voltage reaches 0.65V. The device guarantees valid RESET output for VCC ≥ 1.0V and exhibits immunity to transients ≤ 50µs at 100mV overdrive below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.625V ±2.5% (factory-laser-trimmed; ensures reliable brownout detection for 5V systems) |
| RESET IN Threshold | 1.26V ±33mV (fixed internal reference; enables precise monitoring of auxiliary rails via external divider) |
| Quiescent Current | 1.7µA typ at VCC ≤ 2.0V (enables multi-year battery life in always-on monitoring applications) |
| Reset Timeout Range | 275µs to 5.75ms (capacitor-programmable via SRT pin; supports diverse μP reset timing requirements) |
| Operating Temperature | –40°C to +125°C (fully specified for under-hood automotive and industrial environments) |
| RESET Output Type | Active-high push-pull (drives high during normal operation; eliminates need for external pull-up resistors) |
| Supply Voltage Range | 1.0V to 5.5V (ensures functional reset assertion even during deep brownout conditions) |
Pinout & Package
SOT23-5 package (5-pin, 2.9mm × 1.6mm × 1.1mm body, RoHS-compliant lead-free finish, thermal resistance θJA = 255.9°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull reset output | Drives high during normal operation; pulls low for reset timeout period upon fault detection |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external capacitor (SRT) |
| 3 - RESET IN | Adjustable reset input | High-impedance comparator input referenced to 1.26V; accepts externally divided voltage for dual-rail monitoring |
| 4 - SRT | Set reset timeout input | Connects to external capacitor; 240nA current source charges it to set precise timeout delay |
| 5 - VCC | Supply voltage and fixed-threshold monitor input | Powers device and feeds laser-trimmed 4.625V reset comparator; valid down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage monitoring | Simultaneously supervises main VCC (4.625V) and auxiliary rail (programmable via RESET IN) - eliminates need for two discrete supervisors |
| Capacitor-adjustable timeout | 275µs–5.75ms range set by single external capacitor - avoids fixed-timing limitations of non-programmable supervisors |
| AEC-Q100 qualified variants | /V suffix versions meet automotive stress testing (e.g., MAX6419UK46/V+T) - validated for engine control and ADAS modules |
| Low-power operation | 1.7µA typical ICC at VCC ≤ 2.0V - extends battery life in portable medical and IoT edge sensors |
| Transient immunity | Rejects VCC glitches ≤ 50µs at 100mV overdrive - prevents spurious resets in noisy automotive electrical environments |
Applications
| Automotive Engine Control Unit (ECU) | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Monitors 5V main supply and 3.3V microcontroller core rail in engine management system exposed to wide temperature and EMI. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting active-high RESET to prevent code corruption during cold cranking or load dump events. Use Value: Factory-trimmed 4.625V VCC threshold ensures accurate 5V brownout detection; adjustable RESET IN verifies 3.3V rail integrity without additional components. |
Use Scenario: Ensures safe startup and fault recovery in battery-powered infusion pump with isolated motor driver and analog sensor front-end. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor providing programmable reset timeout to accommodate slow-ramping isolated DC/DC converters. Use Value: 1.7µA typical ICC extends single-charge battery life; capacitor-adjustable timeout (275µs–5.75ms) matches diverse power supply sequencing requirements. |
| Industrial Programmable Logic Controller (PLC) I/O Module | Smart Energy Meter with Dual Power Sources |
Use Scenario: Supervises 24V field bus supply and 3.3V logic rail in DIN-rail mounted PLC module operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: High-temperature-stable supervisor with guaranteed operation to +125°C junction temperature and transient-immune reset logic. Use Value: –40°C to +125°C full-spec operation eliminates derating concerns; 50µs glitch rejection prevents false resets from relay switching noise. |
Use Scenario: Manages failover between mains AC/DC adapter and backup Li-ion battery in revenue-grade electricity meter requiring continuous timekeeping. IC Role / Device Role / Timing Role: Dual-input supervisor verifying both primary (5V) and backup (3.6V) supplies before enabling real-time clock and metrology ASIC. Use Value: Fixed 4.625V threshold guards against mains undervoltage; adjustable RESET IN monitors battery voltage decay to trigger seamless switchover. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6420UK46+T | Active-low open-drain RESET output instead of active-high push-pull; identical dual-threshold architecture and timing specs | Requires external pull-up resistor; suited for wired-OR reset buses or level-shifting to higher-voltage μPs | Select MAX6420UK46+T only if system requires open-drain reset signaling or shared reset bus topology |
| TLV803EB29DBVR | Single fixed-threshold (2.93V) supervisor; no adjustable input, no dual-monitoring capability; 3.5µA ICC | Limited to single-rail monitoring; lacks capacitor-programmable timeout (fixed 200ms delay) | Choose TLV803EB29DBVR only for cost-sensitive, single-supply applications where dual monitoring and timing flexibility are unnecessary |
Compared with MAX6419UK46+T, MAX6420UK46+T offers identical dual-voltage supervision but requires external pull-up for reset assertion, while TLV803EB29DBVR sacrifices adjustability and timing control for lower unit cost in basic single-rail use cases.
Availability
MAX6419UK46+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, industrial PLC modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6419UK46+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, with expertise in power management, sensing, and interface solutions.
The MAX6412–MAX6420 family delivers ultra-low-power, capacitor-programmable microprocessor supervisors optimized for dual-rail voltage monitoring in harsh-environment systems where reliability and timing flexibility are critical.
FAQ
What is the exact VCC reset threshold voltage for MAX6419UK46+T?
The MAX6419UK46+T features a factory-laser-trimmed VCC reset threshold of 4.625V, with ±2.5% accuracy over the full –40°C to +125°C operating temperature range. This value is confirmed in the Electrical Characteristics table of the official datasheet (Rev 11, July 2019) and corresponds to the "46" suffix in the part number per Table 1 (Reset Voltages Suffix Table).
Does MAX6419UK46+T support dual-voltage monitoring, and how is the second threshold set?
Yes, MAX6419UK46+T supports dual-voltage monitoring: it combines a fixed 4.625V VCC threshold with an adjustable RESET IN input referenced to a precise 1.26V internal comparator. The second threshold is set using an external resistor divider (R1/R2) connected to RESET IN, calculated as VMON_TH = 1.26V × (R1 + R2)/R2 - enabling monitoring of any voltage ≥1.26V.
What is the function of the SRT pin on MAX6419UK46+T, and what capacitor value yields a 4ms reset timeout?
The SRT pin on MAX6419UK46+T connects to an external capacitor that sets the reset timeout period via a 240nA internal current source. To achieve a 4ms timeout, use CSRT = (tRP − 275µs) / 2.71×10⁶ = (0.004 − 0.000275) / 2.71×10⁶ ≈ 1375pF. A 1500pF ceramic capacitor yields 4.375ms (within datasheet's typical range).
Is MAX6419UK46+T qualified for automotive applications?
The base MAX6419UK46+T is not explicitly AEC-Q100 qualified; however, Maxim specifies /V-suffixed variants (e.g., MAX6419UK46/V+T) as AEC-Q100 qualified for automotive use. These /V parts undergo additional stress testing and are documented in the Ordering Information section of the datasheet as qualified for under-hood applications.
What is the RESET output configuration of MAX6419UK46+T, and how does it behave during normal operation?
MAX6419UK46+T features an active-high push-pull RESET output. During normal operation (no fault), RESET is driven high to VCC; when VCC or RESET IN falls below their thresholds (or MR is asserted), RESET is pulled low for the programmed timeout period. This eliminates external pull-up resistors and ensures strong logic levels without loading.
MAX6419UK46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.625V, 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
MAX6419UK46+T FAQ
1.How can I place an order for MAX6419UK46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK46+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 MAX6419UK46+T reliable?
The price and inventory of MAX6419UK46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK46+T is usually 5 days.
3.What payment methods are accepted for MAX6419UK46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK46+T?
MAX6419UK46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK46+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 MAX6419UK46+T?
For technical support, including MAX6419UK46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK46+T requirements.
6.How does Aetrix verify that MAX6419UK46+T is sourced from the original manufacturer or authorized distributors?
All MAX6419UK46+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 MAX6419UK46+T meets industry standards.
7.What is the process for return or replacement of MAX6419UK46+T?
All MAX6419UK46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK46+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 MAX6419UK46+T part is unused and in its original packaging.
Return procedure for MAX6419UK46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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