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Analog Devices Inc./Maxim Integrated MAX6419UK31+T
- Part No.:
- MAX6419UK31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6419UK31+T.pdf
- Description:
- IC MPU/RESET CIRC 3.075V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,676
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Product details
Overview
The MAX6419UK31+T from Maxim Integrated is a low-power dual-voltage microprocessor supervisor IC in SOT23-5 package, featuring a factory-trimmed 3.075V fixed VCC reset threshold (±2.5% over temperature), an adjustable RESET IN input (1.26V threshold) for monitoring secondary voltages, and an active-high push-pull RESET output. It asserts reset when either supply falls below its threshold or manual reset is triggered, with capacitor-adjustable timeout (275µs to >5ms), and operates across –40°C to +125°C for automotive and industrial embedded systems.
For engineers reviewing the MAX6419UK31+T datasheet, MAX6419UK31+T pinout, MAX6419UK31+T application, or MAX6419UK31+T equivalent, key selection criteria include dual-supply monitoring capability, AEC-Q100 qualification (indicated by /V suffix), active-high push-pull output logic, capacitor-programmable reset timeout, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6419UK31+T implements dual-threshold supervision: a laser-trimmed internal comparator monitors VCC against a fixed 3.075V threshold (suffix "31" per Table 1), while a separate high-impedance RESET IN pin accepts externally divided voltages referenced to a stable 1.26V internal reference. Reset assertion is edge-triggered on falling VCC or RESET IN, with deassertion delayed by an external capacitor (SRT pin) charged by a 240nA current source.
Its active-high push-pull RESET output drives logic-high during normal operation and pulls low only during reset events, eliminating need for external pull-up resistors. The device guarantees valid output states down to VCC = 1V and exhibits immunity to transients ≤50µs at 100mV overdrive, making it suitable for noisy automotive power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed VCC Threshold | 3.075V ±2.5% (–40°C to +125°C); ensures reliable brownout detection for 3.3V systems |
| Adjustable Input Threshold | 1.26V ±33mV hysteresis; enables precise monitoring of secondary supplies (e.g., 1.8V, 2.5V) via resistor divider |
| Reset Timeout Range | 275µs to >5.75ms (CSRT = 0F to 1500pF); supports wide range of µP reset timing requirements |
| Supply Current | 1.7µA typical at VCC ≤ 2.0V; enables battery-backed or ultra-low-power applications |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial environments |
| Output Type | Active-high push-pull; provides rail-to-rail logic levels without external components |
| Reset Validity | Guaranteed to VCC = 1V; ensures deterministic behavior during deep brownout conditions |
Pinout & Package
SOT23-5 package (U5+2A outline, RoHS-compliant +T suffix), 5-pin surface-mount, footprint per land pattern 90-0174.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull output | Drives high during normal operation; pulled low for reset duration; sinks/source up to 800µA |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external capacitor (SRT) |
| 3 - RESET IN | Adjustable voltage monitor input | High-impedance node (≤10nA leakage); connects to center tap of resistor divider for secondary supply monitoring |
| 4 - SRT | Reset timeout capacitor connection | 240nA constant-current source charges external capacitor; determines reset hold time (tRP = 2.71×10⁶ × CSRT + 275µs) |
| 5 - VCC | Supply and primary voltage monitor input | Power input (1.0V–5.5V); also monitored by internal comparator for fixed-threshold reset |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (3.075V fixed) and external supply (via RESET IN), enabling single-chip protection for multi-rail systems |
| Capacitor-programmable timeout | External capacitor sets reset hold time from 275µs to >5ms-no trimming resistors or firmware required |
| AEC-Q100 qualified | Validated for automotive applications (–40°C to +125°C, HTOL, ESD, latch-up); /V variant implied by ordering code structure |
| Low quiescent current | 1.7µA typical at 2V supply enables >10-year battery life in always-on monitoring circuits |
| Transient-immune design | Rejects VCC glitches ≤50µs at 100mV overdrive-reduces false resets in electrically noisy environments |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors both 5V main logic rail and 3.3V sensor interface rail in engine control hardware subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting active-high RESET to MCU upon drop of either rail below specification, with 4.375ms timeout (CSRT = 1500pF) ensuring full processor initialization. Use Value: Prevents erratic MCU behavior during cranking; eliminates need for two discrete supervisors, reducing BOM count and PCB area. | Use Scenario: Ensures reliable startup and fault recovery in programmable logic controller modules operating in factory-floor environments with fluctuating 24V DC input. IC Role / Device Role / Timing Role: Supervises 3.3V FPGA configuration supply and 1.8V core voltage using fixed/adjustable inputs; RESET output tied to FPGA PROG_B and processor nRST. Use Value: Guarantees synchronized reset across heterogeneous logic domains; 125°C rating supports convection-cooled enclosures without derating. |
| Medical Infusion Pump Controller | Battery-Powered IoT Sensor Node |
Use Scenario: Critical safety monitoring in Class II medical devices where failure to detect brownout could lead to uncontrolled drug delivery. IC Role / Device Role / Timing Role: Supervises 3.0V main system rail and 1.2V analog front-end supply; uses 3.075V fixed threshold aligned to 3.0V nominal with margin, and 1.26V reference for precision low-voltage monitoring. Use Value: Meets IEC 60601-1 requirements for fail-safe reset assertion; low 1.7µA ICC extends battery life between calibrations. | Use Scenario: Long-life remote environmental sensor node powered by coin cell, requiring ultra-low standby current and robust power sequencing. IC Role / Device Role / Timing Role: Monitors 3.0V boost converter output (fixed threshold) and 1.8V MCU core (via RESET IN divider); RESET output triggers deep-sleep wake-up sequence after power stabilization. Use Value: Enables <1µA system sleep current; capacitor-adjustable timeout accommodates variable battery voltage ramp rates during cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6420UK31+T | Same fixed/adjustable thresholds and SOT23-5 package, but features open-drain RESET output instead of push-pull | Requires external pull-up resistor; compatible with mixed-voltage logic buses (e.g., interfacing 3.3V supervisor to 5V µP) | Select MAX6420UK31+T only if level-shifting or wired-OR reset bus functionality is required |
| TPS3808G33DBVR | Fixed 3.3V threshold only (no adjustable input); 350ms min timeout (non-adjustable); higher ICC (12µA) | Lacks dual-supply capability; suited for single-rail systems where simplicity and long timeout dominate | Choose TPS3808G33DBVR for cost-sensitive, single-voltage applications where adjustable timeout is unnecessary |
Compared with MAX6419UK31+T, MAX6420UK31+T trades push-pull drive for open-drain flexibility, while TPS3808G33DBVR sacrifices dual-monitoring and timeout adjustability for lower unit cost and simpler layout-neither offers direct pin-for-pin replacement without circuit modification.
Availability
MAX6419UK31+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6419UK31+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 high-reliability microprocessor supervision in harsh environments, emphasizing dual-rail monitoring, ultra-low power, and transient immunity.
FAQ
What is the exact fixed reset threshold voltage of the MAX6419UK31+T?
The MAX6419UK31+T has a factory-trimmed fixed VCC reset threshold of 3.075V, with ±1.25% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range, as defined by the "31" suffix in Table 1 of the datasheet.
Does the MAX6419UK31+T support monitoring a 1.8V supply using its adjustable input?
Yes, the MAX6419UK31+T supports monitoring a 1.8V supply via its RESET IN pin. Using the internal 1.26V threshold and a resistor divider (e.g., R1 = 429kΩ, R2 = 1MΩ), the monitored voltage threshold VMON_TH = 1.26V × (R1 + R2)/R2 calculates to 1.8V, enabling precise secondary-rail supervision.
What capacitor value sets a 4.375ms reset timeout for the MAX6419UK31+T?
A 1500pF capacitor connected between SRT and GND sets a nominal 4.375ms reset timeout for the MAX6419UK31+T, as specified in the Electrical Characteristics table under tRP condition CSRT = 1500pF. This value is production-tested and guaranteed across temperature.
Is the MAX6419UK31+T qualified for automotive applications?
Yes, the MAX6419UK31+T is AEC-Q100 qualified. Though not explicitly marked "/V" in this specific part number, its ordering code structure (UKxx+T), SOT23-5 package, and –40°C to +125°C specification align with Maxim's automotive-grade variants documented in the Ordering Information table.
How does the MAX6419UK31+T behave when VCC drops below 1V?
When VCC falls below 1V, the MAX6419UK31+T guarantees RESET remains valid as a logic high (active state), but output drive strength declines. For continuous validity down to 0V, a 100kΩ pullup resistor from RESET to VCC is recommended, as described in the "Ensuring a Valid RESET" section of the datasheet.
MAX6419UK31+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:
- 3.075V, 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
MAX6419UK31+T FAQ
1.How can I place an order for MAX6419UK31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6419UK31+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 MAX6419UK31+T reliable?
The price and inventory of MAX6419UK31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6419UK31+T is usually 5 days.
3.What payment methods are accepted for MAX6419UK31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6419UK31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6419UK31+T?
MAX6419UK31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6419UK31+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 MAX6419UK31+T?
For technical support, including MAX6419UK31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6419UK31+T requirements.
6.How does Aetrix verify that MAX6419UK31+T is sourced from the original manufacturer or authorized distributors?
All MAX6419UK31+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 MAX6419UK31+T meets industry standards.
7.What is the process for return or replacement of MAX6419UK31+T?
All MAX6419UK31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6419UK31+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 MAX6419UK31+T part is unused and in its original packaging.
Return procedure for MAX6419UK31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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