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Analog Devices Inc./Maxim Integrated MAX6419UK29+T
- Part No.:
- MAX6419UK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK29+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
The MAX6419UK29+T from Maxim Integrated is an automotive-grade, low-power microprocessor supervisor IC with dual-voltage monitoring capability. It features a factory-trimmed 2.925V fixed VCC reset threshold (±2.5% over temperature), an adjustable RESET IN input (1.26V reference), and an active-high push-pull RESET output. Designed for battery-powered and embedded systems, it ensures reliable μP reset during power-up, brownout, and transient events.
For engineers reviewing the MAX6419UK29+T datasheet, MAX6419UK29+T pinout, MAX6419UK29+T application, or MAX6419UK29+T equivalent, key selection criteria include its AEC-Q100 qualification, capacitor-adjustable reset timeout (275µs to >5ms), guaranteed RESET validity down to VCC = 1V, dual-threshold architecture, and SOT23-5 package compatibility with space-constrained automotive and medical designs.
Technical Context
The MAX6419UK29+T implements a dual-comparator architecture: one laser-trimmed comparator monitors VCC against a 2.925V threshold, while a second high-impedance comparator monitors an external voltage via RESET IN using a 1.26V internal reference. Reset assertion occurs if either voltage falls below its respective threshold or MR is asserted.
Its reset timeout is generated by a precision 240nA current source charging an external capacitor (CSRT) on the SRT pin; the resulting ramp voltage is compared to a 0.65V internal reference to determine deassertion timing. The active-high push-pull RESET output drives logic-compatible levels across the full 1.0V–5.5V VCC range with guaranteed VOL ≤ 0.4V at 3.2mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.925V ±2.5% over -40°C to +125°C - sets precise brownout detection point for main supply |
| RESET IN Reference | 1.26V ±33mV hysteresis - enables accurate external voltage monitoring via resistor divider |
| Reset Timeout Range | 275µs to >5.75ms (CSRT = 0F to 1500pF) - supports diverse μP reset timing requirements |
| Supply Current | 1.7µA typ at VCC ≤ 2.0V - enables multi-year operation in battery-backed systems |
| Operating Temp | -40°C to +125°C - meets automotive under-hood and industrial extended-range needs |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up and ensures fast, rail-to-rail logic transitions |
| VCC Range | 1.0V to 5.5V - guarantees valid RESET assertion even during deep brownout conditions |
Pinout & Package
SOT23-5 package (5-pin, 2.9mm × 1.6mm × 1.1mm), 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 output | Drives μP reset input high after timeout; sinks up to 3.2mA; VOL ≤ 0.4V ensures TTL/CMOS compatibility |
| 2 - GND | Ground reference | Common return path for all internal comparators, current sources, and output stage |
| 3 - RESET IN | Adjustable threshold input | High-impedance node (10nA leakage) for external voltage divider; triggers reset when voltage < 1.26V |
| 4 - SRT | Reset timeout capacitor connection | 240nA precision current source charges external CSRT; determines exact reset hold time |
| 5 - VCC | Power supply input | Supplies internal circuitry and defines fixed reset threshold; operates down to 1.0V with guaranteed RESET behavior |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (2.925V fixed) and external VMON_TH (via resistor divider), enabling single-chip reset control for multi-rail systems |
| Capacitor-adjustable timeout | External CSRT sets tRP from 275µs to >5ms with ±15% accuracy - replaces fixed-delay supervisors and simplifies BOM |
| AEC-Q100 qualified | Rated for automotive applications (-40°C to +125°C); validated for reliability in harsh environments including engine control and ADAS modules |
| Low quiescent current | 1.7µA typical at 2.0V - extends battery life in portable medical devices and telematics without compromising supervision integrity |
| Power-supply transient immunity | Rejects VCC glitches ≤50µs when 100mV below threshold - prevents spurious resets during switching noise or load transients |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and 5V analog sensor rail in engine management system exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting active-high RESET to ARM Cortex-M7 during VCC brownout or sensor rail collapse; timeout set to 4.375ms for safe firmware reload. Use Value: Prevents erratic code execution during cranking transients; AEC-Q100 qualification ensures compliance with ISO 16750-2 pulse testing. | Use Scenario: Ensures deterministic restart of safety-critical MCU in battery-powered infusion pump operating from 2.8V Li-ion cell with variable load. IC Role / Device Role / Timing Role: Supervises main VCC (2.925V threshold) and backup RTC voltage (via RESET IN); uses 1500pF CSRT for 4.375ms timeout aligned with pump motor startup sequence. Use Value: Guarantees full system reset before dose delivery; 1.7µA ICC enables >5-year shelf life with primary battery. |
| Industrial PLC I/O Module | Set-Top Box Power Management |
Use Scenario: Provides fail-safe reset for dual-core processor in DIN-rail mounted controller subjected to 85°C ambient and 100V surge events. IC Role / Device Role / Timing Role: Monitors 5V system rail and isolated 3.3V communication interface voltage; RESET remains asserted until both rails stabilize above thresholds plus timeout. Use Value: Eliminates need for discrete reset ICs per rail; SOT23-5 footprint saves PCB area in dense modular design. | Use Scenario: Manages cold-start sequencing for SoC and tuner subsystems in consumer STB powered from universal AC adapter. IC Role / Device Role / Timing Role: Uses fixed 2.925V threshold for main 3.3V domain and adjustable RESET IN for 1.8V tuner supply; active-high RESET synchronizes boot ROM initialization. Use Value: Resolves timing conflicts between asymmetric power rails; push-pull output avoids weak-pull dependency on SoC internal resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6420UK29+T | Same dual-voltage architecture and 2.925V fixed threshold, but features open-drain RESET output instead of push-pull | Requires external pull-up resistor; suitable for wired-OR reset buses or level-shifting to higher-voltage logic domains | Select MAX6420UK29+T only when open-drain functionality is required for bus arbitration or mixed-voltage interfacing |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 2.925V); no adjustable RESET IN; 300ms fixed timeout (not capacitor-adjustable); 1.8µA ICC | Lacks dual-rail monitoring and timeout flexibility; designed for simpler single-supply systems | Choose TPS3808G33DBVR only for cost-sensitive, single-rail applications where 3.3V threshold and fixed delay suffice |
Compared with MAX6420UK29+T, the MAX6419UK29+T provides faster, more robust reset signaling without external components; versus TPS3808G33DBVR, it delivers critical dual-voltage supervision and programmable timing essential for complex embedded systems.
Availability
MAX6419UK29+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical equipment, industrial PLC modules, and set-top box power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6419UK29+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for demanding industrial, automotive, and medical applications.
The MAX6412–MAX6420 product line was designed specifically for ultra-low-power, dual-rail microprocessor supervision in harsh environments-emphasizing AEC-Q100 qualification, capacitor-programmable timing, and guaranteed operation down to VCC = 1V.
FAQ
What is the exact reset threshold voltage for MAX6419UK29+T?
The MAX6419UK29+T has a factory-trimmed VCC reset threshold of 2.925V, with ±1.25% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value is confirmed in the Electrical Characteristics table and corresponds to the "29" suffix in the part number per the Reset Voltages Suffix Table.
Does MAX6419UK29+T support dual-voltage monitoring, and how is it implemented?
Yes, MAX6419UK29+T supports dual-voltage monitoring. It combines a fixed 2.925V threshold for VCC with an adjustable RESET IN input referenced to an internal 1.26V comparator. An external resistor divider on RESET IN allows monitoring of a second voltage rail (e.g., 1.8V or 5V), triggering reset if either rail falls below its respective threshold.
What is the function of the SRT pin on MAX6419UK29+T, and how is reset timeout calculated?
The SRT pin on MAX6419UK29+T connects to an external capacitor (CSRT) that sets the reset timeout period. A precision 240nA current source charges CSRT; timeout tRP (seconds) = (2.71 × 10⁶) × CSRT (Farads) + 275µs. For example, a 1500pF capacitor yields 4.375ms typical timeout, as specified in the Electrical Characteristics table.
Is MAX6419UK29+T qualified for automotive applications?
Yes, MAX6419UK29+T is AEC-Q100 qualified for automotive use. Its ordering information explicitly lists /V variants, and the device is fully specified from -40°C to +125°C with guaranteed performance, making it suitable for engine control, body electronics, and ADAS modules where reliability under thermal stress is critical.
What type of RESET output does MAX6419UK29+T provide, and what are its drive capabilities?
MAX6419UK29+T provides an active-high push-pull RESET output. It sources up to 800µA at VCC ≥ 4.5V (VOH ≥ 0.8 × VCC) and sinks up to 3.2mA (VOL ≤ 0.4V), eliminating the need for external pull-up resistors and ensuring fast, clean transitions compatible with standard CMOS/TTL inputs across its entire 1.0V–5.5V supply range.
MAX6419UK29+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:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.925V, 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
MAX6419UK29+T FAQ
1.How can I place an order for MAX6419UK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK29+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 MAX6419UK29+T reliable?
The price and inventory of MAX6419UK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK29+T is usually 5 days.
3.What payment methods are accepted for MAX6419UK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK29+T?
MAX6419UK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK29+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 MAX6419UK29+T?
For technical support, including MAX6419UK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK29+T requirements.
6.How does Aetrix verify that MAX6419UK29+T is sourced from the original manufacturer or authorized distributors?
All MAX6419UK29+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 MAX6419UK29+T meets industry standards.
7.What is the process for return or replacement of MAX6419UK29+T?
All MAX6419UK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK29+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 MAX6419UK29+T part is unused and in its original packaging.
Return procedure for MAX6419UK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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