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Analog Devices Inc./Maxim Integrated MAX6319LHUK46C+T
- Part No.:
- MAX6319LHUK46C+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6319LHUK46C+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,515
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Product details
Overview
MAX6319LHUK46C+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, manual reset input (MR), and factory-trimmed 4.63V reset threshold. It provides 140ms minimum power-on reset timeout, operates from 1.0V to 5.5V supply, and guarantees valid reset down to VCC = 1V. Used in embedded control systems to prevent code-execution errors during brownout and power-up.
For engineers reviewing the MAX6319LHUK46C+T datasheet, MAX6319LHUK46C+T pinout, MAX6319LHUK46C+T application, or MAX6319LHUK46C+T equivalent, key selection criteria include reset threshold accuracy (±1.5% at +25°C), MR input compatibility with TTL/CMOS logic, guaranteed reset assertion below 4.63V, and absence of watchdog functionality - distinguishing it from MAX6318LHUK46CY-T and MAX6317HUK46CY-T.
Technical Context
The MAX6319LHUK46C+T implements a precision voltage-monitoring comparator with 40ppm/°C temperature coefficient and internal hysteresis (3mV). Its reset generator asserts an active-low push/pull output for ≥140ms after VCC rises above 4.63V or after MR transitions high, with propagation delay under 230ns (VCC = 5V).
It features a dedicated manual reset input with 52kΩ internal pullup, 100ns glitch rejection, and 1µs minimum pulse width. Unlike watchdog-equipped variants, MAX6319LHUK46C+T omits WDI functionality entirely - confirmed by Selector Guide and Ordering Information tables - making it suitable for systems requiring deterministic reset control without software supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±1.5% at +25°C; ensures reliable detection of 5V rail brownout before system instability. |
| Reset Timeout Period | 140ms minimum; holds processor in reset long enough for stable clock and supply settling after power-up. |
| Supply Voltage Range | 1.0V to 5.5V; supports operation during deep brownout and enables use with 3.3V/5V systems. |
| Reset Output Type | Active-low, push/pull CMOS; drives high/low without external components, sinks 1.2mA at VCC ≥ 2.7V. |
| Manual Reset Input | Internal 52kΩ pullup; accepts TTL/CMOS logic levels, rejects 100ns transients, requires no external debouncing. |
| Operating Temperature | -40°C to +125°C; qualified for industrial and automotive environments per AEC-Q100. |
| Package | SOT23-5 (U5+2A); 2.9mm × 1.6mm footprint, compatible with standard reflow profiles including lead-free (+260°C). |
Pinout & Package
MAX6319LHUK46C+T is housed in a RoHS-compliant 5-pin SOT23 package (outline 21-0057, land pattern 90-0174) with thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull output; asserts logic low when VCC < 4.63V or MR is pulled low; deasserts after 140ms timeout. |
| 2 | GND | Ground reference for all internal comparators and output stage; must be connected to system ground plane. |
| 3 | MR | Active-low manual reset input; internal 52kΩ pullup to VCC; pulling low forces reset for full 140ms timeout. |
| 4 | NC | No connect; pin 4 is unused and must remain unconnected per datasheet Pin Description table. |
| 5 | VCC | Power supply input; monitors voltage level; reset asserted when VCC drops below 4.63V. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, reset timer, and push/pull driver eliminate need for RC networks or pullups. |
| Guaranteed reset validity to VCC = 1V | Ensures clean, monotonic reset assertion even during severe brownout conditions before power collapse. |
| AEC-Q100 qualified | Validated for automotive applications including engine control units and body electronics modules. |
| Factory-trimmed precision threshold | 4.63V reset point trimmed to ±1.5% at +25°C and ±2.5% over -40°C to +125°C - no calibration needed. |
| Immunity to short negative VCC transients | Rejects 200ns supply glitches down to -100mV; prevents spurious resets in electrically noisy environments. |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers exposed to wide-temperature industrial environments. IC Role / Device Role / Timing Role: Monitors 5V system rail and asserts reset if voltage dips below 4.63V during motor switching or EMI events. Use Value: Prevents firmware corruption by guaranteeing 140ms reset hold time after brownout recovery, aligning with PLC boot timing requirements. |
Use Scenario: Reset management for microcontrollers in door module ECUs operating from vehicle battery (9V–16V) with LDO-regulated 5V domain. IC Role / Device Role / Timing Role: Provides deterministic reset initiation upon ignition-on voltage ramp and detects undervoltage faults during cranking. Use Value: AEC-Q100 qualification and -40°C to +125°C operation ensure reliability across automotive lifecycle without watchdog complexity. |
| Medical Infusion Pumps | Smart Energy Meters |
|
Use Scenario: Safety-critical reset supervision for ARM-based controllers managing precise fluid delivery and battery backup switchover. IC Role / Device Role / Timing Role: Asserts reset during main supply interruption and validates return to safe state before resuming therapy. Use Value: 4.63V threshold matches 5V rail tolerance; 1.0V minimum VCC operation allows reset assertion through final battery discharge phase. |
Use Scenario: Metering SoC reset coordination in utility-grade electricity meters subjected to grid voltage sags and lightning-induced transients. IC Role / Device Role / Timing Role: Detects sustained 5V rail drop below 4.63V and initiates controlled shutdown/restart sequence. Use Value: Immunity to 200ns VCC glitches eliminates false resets during transient surges, improving field reliability and certification compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6318LHUK46CY-T | Includes watchdog input (WDI) with 1.6s typical timeout; identical 4.63V threshold and 140ms reset timeout. | Required where software execution monitoring is needed; adds WDI routing and firmware servicing overhead. | Select MAX6318LHUK46CY-T only if watchdog capability is mandatory; otherwise MAX6319LHUK46C+T reduces design complexity. |
| MAX6317HUK46CY-T | Features active-high push/pull reset output instead of active-low; same 4.63V threshold and 140ms timeout. | Used with MCUs requiring active-high reset assertion (e.g., certain Renesas or NXP families). | Choose MAX6317HUK46CY-T only when MCU reset pin polarity demands high-active signal; verify compatibility with target processor. |
Compared with MAX6318LHUK46CY-T and MAX6317HUK46CY-T, MAX6319LHUK46C+T offers simplified reset-only supervision without WDI routing or polarity inversion - reducing PCB trace count, eliminating watchdog firmware dependencies, and lowering BOM cost while maintaining identical voltage and timing specifications.
Availability
MAX6319LHUK46C+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical infusion pumps requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6319LHUK46C+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 industrial, automotive, and communications markets.
The MAX6316–MAX6322 family delivers highly integrated μP supervisory circuits optimized for deterministic power-monitoring in space-constrained, high-reliability embedded systems - with emphasis on factory-trimmed accuracy, wide temperature operation, and minimal external component count.
FAQ
What is the reset threshold voltage of MAX6319LHUK46C+T and how accurate is it?
The MAX6319LHUK46C+T has a factory-trimmed nominal reset threshold of 4.63V, with accuracy of ±1.5% at +25°C and ±2.5% over the full -40°C to +125°C operating range. This precision eliminates need for external calibration and ensures consistent brownout detection across temperature extremes. The 40ppm/°C temperature coefficient further stabilizes performance in thermally varying environments.
Does MAX6319LHUK46C+T include a watchdog timer function?
No, MAX6319LHUK46C+T does not include a watchdog timer. Per the Selector Guide and Electrical Characteristics tables, it lacks the WDI (watchdog input) pin and associated timing circuitry. This distinguishes it from MAX6318LHUK46CY-T and MAX6317HUK46CY-T, which feature watchdog capability. MAX6319LHUK46C+T is designed strictly for voltage monitoring and manual reset supervision.
What is the function of pin 4 on MAX6319LHUK46C+T?
Pin 4 on MAX6319LHUK46C+T is a no-connect (NC) terminal. As confirmed in the Pin Description table on page 5 of the datasheet, this pin is unused and must remain unconnected in the PCB layout. Routing or soldering to pin 4 may cause functional or reliability issues and violates the device's validated package configuration.
Can MAX6319LHUK46C+T operate with supply voltages below 2.5V?
Yes, MAX6319LHUK46C+T operates from 1.0V to 5.5V, as specified in the Absolute Maximum Ratings and Electrical Characteristics sections. Its reset output remains valid down to VCC = 1.0V, enabling reliable supervision during deep brownout conditions where other supervisors fail. This extends system uptime in battery-powered applications nearing end-of-life discharge.
How does the manual reset (MR) input behave when left unconnected?
When left unconnected, the MR input of MAX6319LHUK46C+T is pulled high internally via a 52kΩ resistor to VCC, disabling manual reset assertion. This allows the device to function solely as a power-supply monitor. No external pullup is required, and the input rejects 100ns transients - making it robust against noise without added components.
MAX6319LHUK46C+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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6319LHUK46C+T FAQ
1.How can I place an order for MAX6319LHUK46C+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319LHUK46C+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 MAX6319LHUK46C+T reliable?
The price and inventory of MAX6319LHUK46C+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319LHUK46C+T is usually 5 days.
3.What payment methods are accepted for MAX6319LHUK46C+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6319LHUK46C+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6319LHUK46C+T?
MAX6319LHUK46C+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319LHUK46C+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 MAX6319LHUK46C+T?
For technical support, including MAX6319LHUK46C+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319LHUK46C+T requirements.
6.How does Aetrix verify that MAX6319LHUK46C+T is sourced from the original manufacturer or authorized distributors?
All MAX6319LHUK46C+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 MAX6319LHUK46C+T meets industry standards.
7.What is the process for return or replacement of MAX6319LHUK46C+T?
All MAX6319LHUK46C+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319LHUK46C+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 MAX6319LHUK46C+T part is unused and in its original packaging.
Return procedure for MAX6319LHUK46C+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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