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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:1,988
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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. It is used in embedded control systems to prevent code-execution errors during power-up, brownout, or software lockup.
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, ±2.5% over -40°C to +125°C), MR input compatibility with TTL/CMOS logic, guaranteed reset assertion at VCC < 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 integrated hysteresis (3mV typical) to reject noise-induced false resets. Its reset generator asserts active-low RESET for ≥140ms after VCC rises above 4.63V, with propagation delay under 40µs during VCC fall.
It features an internal 52kΩ MR pullup resistor, supports MR pulse widths as short as 1.5µs (–40°C to +125°C), and rejects 100ns glitches on MR. Unlike watchdog-equipped variants, MAX6319LHUK46C-T omits WDI pin functionality and uses Pin 4 exclusively as MR - confirmed by pin configuration diagrams and Selector Guide.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal (factory-trimmed); ±1.5% at +25°C, ±2.5% over full temperature range - ensures reliable detection of 4.63V supply brownout. |
| Reset Timeout Period | 140ms minimum (C-suffix); guarantees processor initialization completes before deassertion - matches Intel-compatible reset timing requirements. |
| Supply Voltage Range | 1.0V to 5.5V; valid reset operation down to VCC = 1V enables use in ultra-low-voltage brownout detection. |
| Reset Output Type | Active-low, push/pull CMOS; sinks 1.2mA @ 2.7V and sources 500µA @ 2.7V - drives standard µP reset inputs without external components. |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC (for VTH < 4.0V); compatible with 3.3V and 5V logic families - eliminates level-shifter requirement. |
| Quiescent Current | 3µA typical @ 3.6V, 12µA max @ 5.5V - enables multi-year battery life in portable equipment. |
| Operating Temperature | –40°C to +125°C; AEC-Q100 qualified - suitable for automotive engine control and industrial motor drives. |
Pinout & Package
MAX6319LHUK46C-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, with thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push/pull CMOS output; asserts low when VCC < 4.63V, MR low, or watchdog timeout (not applicable here); deasserts after 140ms timeout. |
| 2 | GND | Ground reference for all internal comparators and reset logic; must be connected to system ground plane for noise immunity. |
| 3 | MR (manual reset) | Active-low input; internal 52kΩ pullup to VCC; asserts reset when pulled ≤0.3×VCC; 100ns glitch rejection prevents spurious resets. |
| 4 | NC | No connect; pin 4 is unconnected internally - confirmed by MAX6319LH pin configuration diagram and absence from functional block diagram. |
| 5 | VCC | Power supply input; monitors voltage for reset generation; absolute max rating –0.3V to +6V; supports bypass capacitor placement adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, hysteresis, and MR pullup eliminate discrete resistors/capacitors - reduces BOM count and PCB area. |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout - critical for fail-safe shutdown in automotive ECUs. |
| Factory-trimmed 4.63V threshold | Eliminates calibration step; meets tight tolerance requirements for 4.63V LDO-supplied systems without trimming resistors. |
| 140ms reset timeout (C-suffix) | Matches industry-standard µP power-on reset hold time - avoids race conditions in ARM Cortex-M boot sequences. |
| AEC-Q100 qualified | Validated for automotive applications including powertrain and body electronics - supports PPAP documentation requirements. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring 4.63V auxiliary supply powering MCU and gate drivers in variable-frequency drives. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to ARM-based motion controller during undervoltage events. Use Value: Prevents erratic PWM output during 4.63V rail sag caused by high-current IGBT switching transients. | Use Scenario: Reset management for LIN gateway MCU powered from 4.63V regulated supply in door module. IC Role / Device Role / Timing Role: Voltage monitor and manual reset interface ensuring safe startup after battery disconnect/reconnect. Use Value: Guarantees 140ms reset hold time meets ISO 16750-2 cold-crank recovery timing requirements. |
| Medical Infusion Pumps | Railway Signaling Controllers |
Use Scenario: Power supervision for safety-critical ARM Cortex-M4 MCU controlling stepper motor and pressure sensors. IC Role / Device Role / Timing Role: Fail-safe reset generator with 4.63V threshold aligned to medical-grade 4.63V LDO output. Use Value: Enables IEC 62304 Class C compliance via deterministic brownout response and no-watchdog simplicity. | Use Scenario: Monitoring 4.63V backup supply in EN 5012x-certified signaling logic unit during track power fluctuations. IC Role / Device Role / Timing Role: Supervisory circuit providing 140ms reset pulse synchronized to EN 50126 reliability thresholds. Use Value: Eliminates need for external RC network while meeting SIL-2 fault-detection timing constraints. |
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) on Pin 4; same 4.63V threshold and 140ms reset timeout. | Required where software lockup detection is mandated (e.g., IEC 61508 safety systems). | Select MAX6318LHUK46CY-T only if watchdog functionality is needed; MAX6319LHUK46C-T simplifies design where MR-only reset suffices. |
| TLV803EB46DBZR | 4.63V threshold, 140ms timeout, SOT23-5, but lacks MR input - Pin 3 is NC, Pin 4 is GND. | Suitable for basic power-on reset only; cannot support pushbutton-initiated reset or system-level reset coordination. | Choose TLV803EB46DBZR for cost-sensitive, MR-free applications; MAX6319LHUK46C-T adds MR flexibility for field service and diagnostics. |
Compared with MAX6318LHUK46CY-T, MAX6319LHUK46C-T removes WDI complexity and reduces pin count usage, lowering layout risk; versus TLV803EB46DBZR, it adds MR capability essential for user-triggered reset and system-level fault recovery - making it optimal for industrial HMI and automotive body controllers requiring both power and manual reset paths.
Availability
MAX6319LHUK46C-T is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
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 computing applications, with emphasis on reliability and integration.
The MAX6316–MAX6322 family delivers compact, AEC-Q100-qualified supervisory circuits targeting power integrity in space-constrained embedded systems - specifically engineered for deterministic reset timing and robust noise immunity in harsh environments.
FAQ
What is the reset threshold voltage of the MAX6319LHUK46C-T?
The MAX6319LHUK46C-T has a factory-trimmed nominal reset threshold of 4.63V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in Table 1 and Table 2 of the datasheet, and corresponds to the "46" suffix in the part number. The MAX6319LHUK46C-T uses this precise threshold to monitor 4.63V-regulated supplies in automotive and industrial applications.
Does the MAX6319LHUK46C-T include a watchdog timer function?
No, the MAX6319LHUK46C-T does not include a watchdog timer. Unlike MAX6318LHUK46CY-T or MAX6317HUK46CY-T, the MAX6319LHUK46C-T omits the watchdog input (WDI) function - Pin 4 is designated as NC (no connect), and the Selector Guide explicitly lists "-" under WATCHDOG INPUT for MAX6319LH. This makes MAX6319LHUK46C-T appropriate for systems requiring only power and manual reset supervision.
What is the function of Pin 4 on the MAX6319LHUK46C-T?
Pin 4 on the MAX6319LHUK46C-T is a no-connect (NC) terminal. The device's pin configuration diagram, Selector Guide, and functional block diagram confirm that MAX6319LH variants use only Pins 1 (RESET), 2 (GND), 3 (MR), and 5 (VCC); Pin 4 is unconnected internally. This distinguishes MAX6319LHUK46C-T from MAX6318LHUK46CY-T (which uses Pin 4 as WDI) and avoids misrouting during PCB layout.
What is the minimum reset timeout period for the MAX6319LHUK46C-T?
The MAX6319LHUK46C-T has a minimum reset timeout period of 140ms, indicated by the "C" suffix in its part number per Table 3. This timeout begins when VCC rises above 4.63V and ensures the microprocessor completes power-on initialization before reset deassertion. The 140ms value is guaranteed over temperature and supply voltage, supporting reliable boot sequencing in ARM and RISC-V-based controllers.
Is the MAX6319LHUK46C-T suitable for automotive applications?
Yes, the MAX6319LHUK46C-T is AEC-Q100 qualified and specified for operation from –40°C to +125°C, making it suitable for automotive body control modules, infotainment power management, and ADAS subsystems. Its 4.63V reset threshold aligns with common automotive 4.63V LDO outputs, and guaranteed reset validity down to VCC = 1V supports cold-crank scenarios. The MAX6319LHUK46C-T meets automotive reliability and qualification requirements without derating.
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:
- Obsolete
- 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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