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Analog Devices Inc./Maxim Integrated MAX6319LHUK26C-T
- Part No.:
- MAX6319LHUK26C-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6319LHUK26C-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,834
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Product details
Overview
MAX6319LHUK26C-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 2.63V reset threshold. It provides 140ms minimum power-on reset timeout, operates from 1.0V to 5.5V supply, guarantees valid reset down to VCC = 1V, and is AEC-Q100 qualified for automotive use.
For engineers reviewing the MAX6319LHUK26C-T datasheet, MAX6319LHUK26C-T pinout, MAX6319LHUK26C-T application, or MAX6319LHUK26C-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over -40°C to +125°C), MR input glitch rejection (100ns), bidirectional compatibility support, and absence of watchdog functionality - critical for deterministic reset-only systems in portable/battery-powered equipment and embedded control.
Technical Context
The MAX6319LHUK26C-T implements a precision voltage monitor with factory-laser-trimmed resistor divider setting nominal VRST = 2.63V, ±2.5% tolerance over full temperature range. Its reset generator asserts active-low RESET for ≥140ms after VCC rises above VRST or after MR release, with guaranteed logic-level validity down to VCC = 1V.
This variant lacks watchdog input (WDI) functionality per Selector Guide and MAX6319 family documentation, distinguishing it from MAX6316–MAX6318/MAX6320–MAX6321. It features manual reset input with internal 52kΩ pullup, 1.5µs minimum MR pulse width at +125°C, and 100ns glitch rejection - optimized for systems requiring deterministic reset initiation without software supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection for 2.7V/3.3V systems |
| Reset Timeout Period | 140ms minimum - meets boot-time margin requirements for mid-speed microcontrollers |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and enables use with Li-ion battery discharge profiles |
| Supply Current | 3µA typical at 3.6V, 12µA max - enables multi-year battery life in always-on monitoring applications |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC - compatible with CMOS/TTL logic across 1.8V–5V domains |
| Reset Output Type | Active-low, push/pull - drives reset line directly without external pullup; sinks 1.2mA at VCC ≥ 2.7V |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial edge environments |
Pinout & Package
MAX6319LHUK26C-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), footprint-compatible with JEDEC MS-012AC, thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output; sinks 1.2mA at VCC ≥ 2.7V; valid down to VCC = 1V |
| 2 | GND | Ground reference for all internal circuitry and reset assertion logic |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ; rejects 100ns glitches |
| 4 | NC | No connect - pin 4 is unused and must remain unconnected per datasheet |
| 5 | VCC | Power supply input; monitors voltage for reset assertion; absolute max = +6V |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated precision voltage reference, reset timer, and push/pull driver eliminate BOM cost and layout area |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic system reset even during severe brownout or battery depletion |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| Factory-trimmed 2.63V threshold | Eliminates need for external resistor network; achieves ±2.5% accuracy over full temp range |
| 140ms reset timeout | Matches typical microcontroller boot initialization windows without requiring external timing capacitors |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
|
Use Scenario: Long-life sensor node powered by coin cell or Li-SOCl₂ battery, requiring reliable wake-up and fault recovery. IC Role / Device Role / Timing Role: Supervises VCC rail and initiates hard reset upon voltage sag below 2.63V; provides 140ms hold time for MCU firmware initialization. Use Value: Enables >10-year operation by drawing only 3µA typical supply current and asserting reset before brownout-induced corruption occurs. |
Use Scenario: Industrial PLC I/O module with isolated power rails and real-time deterministic response requirements. IC Role / Device Role / Timing Role: Monitors primary 3.3V logic supply and triggers synchronized reset across multiple ASICs when undervoltage detected. Use Value: Prevents metastability and latch-up by guaranteeing clean, monotonic reset assertion with no watchdog dependency. |
| Automotive Body Electronics | Intelligent Instruments |
|
Use Scenario: Automotive door module operating across battery voltage range (5.5V–16V) with cold-crank immunity. IC Role / Device Role / Timing Role: Provides AEC-Q100-compliant reset supervision for microcontroller during cranking transients and load-dump events. Use Value: Immune to short negative VCC transients (<4µs, 100mV under VRST); eliminates false resets during engine start. |
Use Scenario: Handheld test instrument with dual-supply architecture (analog 5V, digital 3.3V) and low-power sleep mode. IC Role / Device Role / Timing Role: Monitors 3.3V digital rail and forces controlled restart if supply drops below 2.63V during battery swap or low-charge condition. Use Value: Ensures data integrity by preventing partial writes to flash memory during undervoltage conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6319MHUK26C-T | Bidirectional active-low reset output instead of push/pull; includes internal 4.7kΩ pullup + active P-channel FET | Required for interfacing with Motorola 68HC11 or other µPs with bidirectional reset pins | Select MAX6319MHUK26C-T only when µP reset pin requires bidirectional drive capability |
| MAX6316LUK26C-T | Includes watchdog input (WDI); same 2.63V threshold and 140ms reset timeout | Suitable where software execution monitoring is needed alongside power supervision | Choose MAX6316LUK26C-T if system requires watchdog timer to detect infinite loops or firmware hangs |
Compared with MAX6319LHUK26C-T, MAX6319MHUK26C-T adds bidirectional reset drive for legacy µP compatibility but increases complexity, while MAX6316LUK26C-T adds watchdog functionality at the cost of additional software integration effort - neither offers pin-to-pin replacement without circuit review.
Availability
MAX6319LHUK26C-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, automotive body electronics, and embedded control systems requiring stable component supply, AEC-Q100 qualification, and deterministic reset behavior without watchdog overhead.
Supply support for MAX6319LHUK26C-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 power, sensing, and interface applications across automotive, industrial, and computing markets.
The MAX6316–MAX6322 product line delivers compact, factory-configured supervisory circuits targeting space-constrained, reliability-critical systems where precise voltage monitoring and robust reset generation are essential.
FAQ
What is the reset threshold voltage of MAX6319LHUK26C-T and how accurate is it?
The MAX6319LHUK26C-T has a factory-trimmed nominal reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This specification is confirmed in Table 1 and Electrical Characteristics section of the datasheet, ensuring reliable undervoltage detection for 2.7V and 3.3V systems without external calibration.
Does MAX6319LHUK26C-T include a watchdog timer function?
No, MAX6319LHUK26C-T does not include a watchdog timer. Per the Selector Guide and device family documentation, only MAX6316, MAX6317, MAX6318, MAX6320, and MAX6321 variants feature watchdog input (WDI); MAX6319 and MAX6322 are explicitly designated as manual-reset-only devices with no WDI pin or associated circuitry.
What is the function of Pin 4 on MAX6319LHUK26C-T?
Pin 4 on MAX6319LHUK26C-T is a no-connect (NC) terminal. The datasheet Pin Description table and Typical Operating Circuit diagrams confirm that this pin is unused and must remain unconnected in PCB layout to avoid unintended electrical interaction or reliability risk.
What is the minimum pulse width required on the MR input of MAX6319LHUK26C-T?
The MR input of MAX6319LHUK26C-T requires a minimum pulse width of 1.5µs at +125°C and 1µs at +85°C to reliably trigger reset assertion. This parameter is specified in the Electrical Characteristics table under "MR Input Pulse Width" and reflects worst-case timing across temperature and process variation.
Is MAX6319LHUK26C-T qualified for automotive applications?
Yes, MAX6319LHUK26C-T is AEC-Q100 qualified, as explicitly stated in the Benefits and Features section of the datasheet. This qualification covers stress testing for temperature cycling, humidity, ESD, and mechanical shock - confirming suitability for automotive body electronics, infotainment, and ADAS subsystems.
MAX6319LHUK26C-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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6319LHUK26C-T FAQ
1.How can I place an order for MAX6319LHUK26C-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319LHUK26C-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 MAX6319LHUK26C-T reliable?
The price and inventory of MAX6319LHUK26C-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319LHUK26C-T is usually 5 days.
3.What payment methods are accepted for MAX6319LHUK26C-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6319LHUK26C-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6319LHUK26C-T?
MAX6319LHUK26C-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319LHUK26C-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 MAX6319LHUK26C-T?
For technical support, including MAX6319LHUK26C-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319LHUK26C-T requirements.
6.How does Aetrix verify that MAX6319LHUK26C-T is sourced from the original manufacturer or authorized distributors?
All MAX6319LHUK26C-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 MAX6319LHUK26C-T meets industry standards.
7.What is the process for return or replacement of MAX6319LHUK26C-T?
All MAX6319LHUK26C-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319LHUK26C-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 MAX6319LHUK26C-T part is unused and in its original packaging.
Return procedure for MAX6319LHUK26C-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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