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Analog Devices Inc./Maxim Integrated MAX6319LHUK31A+T
- Part No.:
- MAX6319LHUK31A+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6319LHUK31A+T.pdf
- Description:
- IC SUPERVISOR 3.080V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
MAX6319LHUK31A+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, manual reset input, and factory-trimmed 3.08V reset threshold (±1.5% at +25°C, ±2.5% over -40°C to +125°C), 140ms minimum reset timeout, and AEC-Q100 qualification for automotive use. It monitors VCC supply integrity and asserts reset during power-up, brownout, or manual trigger events in embedded control systems.
For engineers reviewing the MAX6319LHUK31A+T datasheet, MAX6319LHUK31A+T pinout, MAX6319LHUK31A+T application, or MAX6319LHUK31A+T equivalent, key selection criteria include its 3.08V reset threshold accuracy, guaranteed reset validity down to VCC = 1V, 140ms reset timeout, manual reset input with 52kΩ internal pullup, and compatibility with bidirectional μP reset buses requiring fast rise-time support.
Technical Context
The MAX6319LHUK31A+T implements a precision voltage-monitoring comparator with laser-trimmed resistive divider to set the 3.08V reset threshold, coupled with a monostable timer that enforces a minimum 140ms reset assertion after VCC recovery or MR release. Its active-low push/pull reset output sources/sinks current and remains valid down to VCC = 1V.
Unlike watchdog-equipped variants (e.g., MAX6318LH), this part omits the WDI pin and watchdog functionality-confirmed by Selector Guide and Pin Description tables-making it a dedicated reset supervisor with simplified timing control and lower quiescent current (3–12µA at VCC = 3.6V/5.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal (±1.5% at +25°C; ±2.5% over -40°C to +125°C) - ensures reliable detection of 3.3V supply brownout before system malfunction. |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for microprocessor initialization after power stabilization. |
| Supply Current | 3µA typical at VCC = 3.6V - enables ultra-low-power operation in battery-backed or energy-constrained systems. |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1V VCC. |
| Reset Output Type | Active-Low, Push/Pull - drives reset line directly without external pullup; sinks 1.2mA at VCC ≥ 2.7V (VOL ≤ 0.3V). |
| Manual Reset Input | MR with 52kΩ internal pullup - allows momentary switch-to-ground interface without external components; rejects 100ns glitches. |
| Package | SOT23-5 (U5+2A) - 2.9mm × 1.6mm footprint with thermal resistance θJA = 255.9°C/W (multi-layer board) for compact, thermally robust placement. |
Pinout & Package
SOT23-5 package (package code U5+2A, outline 21-0057), lead-free, RoHS-compliant, AEC-Q100 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output; asserts low during VCC undervoltage, MR low, or after timeout expiration; valid down to VCC = 1V. |
| 2 | GND | Ground reference for all internal circuitry and reset output sink path. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ resistor; triggers reset when pulled below VIH/VIL thresholds. |
| 4 | NC | No connect - pin 4 is unused and must remain unconnected per datasheet pin configuration diagram. |
| 5 | VCC | Main supply input; reset asserted when VCC falls below 3.08V threshold; supports 1.0V–5.5V operating range. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated 52kΩ MR pullup, precision voltage divider, and monostable reset timer eliminate need for discrete R/C networks or external biasing. |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout or backup-battery fallback, preventing undefined processor states. |
| AEC-Q100 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS subsystems requiring extended temperature (-40°C to +125°C) reliability. |
| Immunity to short negative VCC transients | Withstands 200ns ground-to-VCC supply glitches without false reset assertion, improving system robustness in noisy electrical environments. |
| Factory-trimmed reset threshold | 3.08V threshold set via laser trimming (Table 1: MAX63___31_ _-T) ensures ±1.5% accuracy at +25°C without calibration overhead. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in diesel ECU exposed to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 core during VCC dip below 3.08V or manual service reset. Use Value: Prevents code execution errors during battery voltage sag; 140ms timeout ensures full MCU register initialization before boot. | Use Scenario: Embedded controller in DIN-rail mounted PLC monitoring 5V logic rail powering digital I/O drivers. IC Role / Device Role / Timing Role: Dedicated reset supervisor with manual reset button interface and glitch-immune MR input. Use Value: Eliminates need for external RC network; 52kΩ internal MR pullup reduces BOM count and PCB area by >2 components per node. |
| Medical Infusion Pump Controller | Battery-Powered Handheld Test Instrument |
Use Scenario: Safety-critical microcontroller supervision in Class II medical device with dual 3.3V/5V rails and battery backup. IC Role / Device Role / Timing Role: Primary reset generator ensuring deterministic restart after power interruption or user-initiated reset. Use Value: Guaranteed reset validity down to VCC = 1V enables safe shutdown sequencing and nonvolatile state preservation during brownout. | Use Scenario: Portable multimeter with low-power MSP430 MCU operating from single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Voltage monitor and reset initiator for brownout protection during battery discharge. Use Value: 3µA typical supply current extends battery life; 3.08V threshold aligns precisely with 3.3V LDO dropout margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6319MHUK31A+T | Bidirectional active-low reset output (not push/pull); includes 4.7kΩ internal pullup + active P-channel FET for fast rise time on shared reset bus. | Required where μP (e.g., Motorola 68HC11) uses bidirectional reset pin and multiple devices share RESET line. | Select MAX6319MHUK31A+T only if interfacing with bidirectional-reset microcontrollers needing sub-500ns rise time under 200pF load. |
| TLV803EB30DBVR | 3.0V reset threshold (±0.5% typ), 200ms reset timeout, SOT23-5, no manual reset input, higher ICC (0.5µA max). | Lacks MR pin; suited for simple power-on reset only, not field-serviceable or glitch-recovery scenarios. | Choose TLV803EB30DBVR when manual reset is unnecessary and tighter threshold tolerance (±0.5%) outweighs missing MR functionality. |
Compared with MAX6319MHUK31A+T, the MAX6319LHUK31A+T provides simpler push/pull drive without bidirectional timing constraints; versus TLV803EB30DBVR, it adds field-serviceable MR capability and automotive qualification at the cost of slightly looser threshold tolerance.
Availability
MAX6319LHUK31A+T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC modules, medical infusion pump controllers, and battery-powered handheld test instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6319LHUK31A+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 high-performance analog and mixed-signal ICs for automotive, industrial, communications, and computing markets.
The MAX6316–MAX6322 product line delivers compact, factory-trimmed supervisory circuits optimized for reliable microprocessor reset generation in space-constrained, thermally demanding, and safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6319LHUK31A+T and how is it trimmed?
The MAX6319LHUK31A+T has a factory-laser-trimmed nominal reset threshold of 3.08V, corresponding to "31" in the part number per Table 1 (MAX63___31_ _-T). At +25°C, tolerance is ±1.5%; over -40°C to +125°C, it is ±2.5%. This value is set during wafer sort using precision resistor trimming, eliminating need for external calibration.
Does MAX6319LHUK31A+T include a watchdog timer function?
No, MAX6319LHUK31A+T does not include a watchdog timer. The Selector Guide explicitly lists "-" under WATCHDOG INPUT for MAX6319LH, and Pin Description confirms pin 4 is NC (no connect), not WDI. It is a dedicated reset supervisor with manual reset only-unlike MAX6318LH which includes WDI.
What is the function of pin 4 on MAX6319LHUK31A+T?
Pin 4 on MAX6319LHUK31A+T is a no-connect (NC) terminal, as confirmed by the Pin Description table and Typical Operating Circuit diagrams. It must remain unconnected in PCB layout; routing or soldering to this pin may cause functional failure or violate absolute maximum ratings.
How does the manual reset (MR) input behave on MAX6319LHUK31A+T?
The MR input on MAX6319LHUK31A+T is active-low with an internal 52kΩ pullup to VCC. Pulling MR below VIH/VIL thresholds (0.3×VCC/0.7×VCC for VTH < 4.0V) asserts reset for the full 140ms timeout period after MR returns high. It rejects 100ns glitches and requires no external debouncing.
Is MAX6319LHUK31A+T qualified for automotive applications?
Yes, MAX6319LHUK31A+T is AEC-Q100 qualified, as stated in the Benefits and Features section. It operates across -40°C to +125°C, supports VCC down to 1V, and is designed for automotive subsystems including engine control, body electronics, and infotainment where reset reliability under harsh electrical conditions is critical.
MAX6319LHUK31A+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6319LHUK31A+T FAQ
1.How can I place an order for MAX6319LHUK31A+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319LHUK31A+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 MAX6319LHUK31A+T reliable?
The price and inventory of MAX6319LHUK31A+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319LHUK31A+T is usually 5 days.
3.What payment methods are accepted for MAX6319LHUK31A+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6319LHUK31A+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6319LHUK31A+T?
MAX6319LHUK31A+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319LHUK31A+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 MAX6319LHUK31A+T?
For technical support, including MAX6319LHUK31A+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319LHUK31A+T requirements.
6.How does Aetrix verify that MAX6319LHUK31A+T is sourced from the original manufacturer or authorized distributors?
All MAX6319LHUK31A+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 MAX6319LHUK31A+T meets industry standards.
7.What is the process for return or replacement of MAX6319LHUK31A+T?
All MAX6319LHUK31A+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319LHUK31A+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 MAX6319LHUK31A+T part is unused and in its original packaging.
Return procedure for MAX6319LHUK31A+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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