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Analog Devices Inc./Maxim Integrated MAX6319MHUK46CY-T
- Part No.:
- MAX6319MHUK46CY-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6319MHUK46CY-T.pdf
- Description:
- 5PIN MICROPROCESSOR SUPERVISORY
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6319MHUK46CY-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with manual reset input, active-high push/pull reset output, and factory-trimmed 4.63V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, and no watchdog function. It monitors VCC in embedded control systems and ensures reliable power-on reset during brownout conditions.
For engineers reviewing the MAX6319MHUK46CY-T datasheet, MAX6319MHUK46CY-T pinout, MAX6319MHUK46CY-T application, or MAX6319MHUK46CY-T equivalent, this page provides verified functional identity, exact reset threshold and timeout values, confirmed SOT23-5 package mapping, bidirectional reset compatibility notes, and two validated alternative parts for manual-reset supervisory use cases.
Technical Context
The MAX6319MHUK46CY-T belongs to the MAX6316–MAX6322 family and implements a voltage-monitoring reset generator with manual reset assertion capability but no watchdog timer. Its reset output is active-high, push/pull, guaranteed valid down to VCC = 1V, and features ±2.5% reset threshold tolerance across -40°C to +125°C.
It uses a factory-laser-trimmed resistor divider to set the 4.63V nominal reset threshold (per Table 1), supports 140ms minimum reset timeout (C-suffix), and integrates internal MR pullup (52kΩ). The device is AEC-Q100 qualified and offered in lead-free SOT23 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±2.5% over full temperature range - ensures accurate brownout detection at 4.63V supply rails |
| Reset Timeout Period | 140ms minimum - guarantees processor reset hold time sufficient for stable clock and memory initialization |
| Supply Voltage Range | 1.0V to 5.5V - enables operation during deep brownout and compatibility with 1.8V/3.3V/5V systems |
| Reset Output Type | Active-high, push/pull - drives high without external pullup; sinks/source current up to 1.2mA at 2.7V |
| Manual Reset Input | Internal 52kΩ pullup; logic-low assertion; 1.5µs minimum pulse width - supports direct switch connection without debouncing |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial harsh-environment deployment |
| Package | 5-pin SOT23 - surface-mount footprint compatible with automated assembly and space-constrained PCB layouts |
Pinout & Package
Package: 5-pin SOT23, 1.6mm × 2.9mm body, 0.95mm height, gull-wing leads, RoHS-compliant lead-free finish (specified by "+T" suffix; this part uses "-T" leaded variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push/pull reset output; asserts high when VCC < 4.63V or MR is low; deasserts after 140ms timeout |
| 2 | GND | Ground reference for all internal circuits and reset timing; must be low-impedance connection |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ; asserts reset when pulled ≤0.3×VCC |
| 4 | NC | No connect - pin 4 is unconnected internally; must remain floating or grounded per layout guidelines |
| 5 | VCC | Power supply input; monitored for reset generation; absolute max 6V; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor network; achieves ±2.5% accuracy over -40°C to +125°C without calibration |
| 140ms minimum reset timeout | Ensures sufficient hold time for microcontrollers requiring >100ms power stabilization before code execution |
| Active-high push/pull RESET output | Drives high actively - no external pullup required; compatible with processors expecting active-high reset signals |
| Guaranteed operation down to VCC = 1V | Maintains valid reset assertion even during severe brownout, preventing premature processor release |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS subsystems |
Applications
| Industrial PLC Control | Automotive Body Controller |
|---|---|
Use Scenario: Supervises 5V supply rail in programmable logic controller I/O modules exposed to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-high RESET to ARM Cortex-M7 MCU upon undervoltage; holds reset for ≥140ms. Use Value: Prevents corrupted register initialization during cold-cranking voltage sag; eliminates need for discrete RC reset network. | Use Scenario: Embedded in door module controlling window lift, mirror fold, and interior lighting with CAN communication. IC Role / Device Role / Timing Role: Provides AEC-Q100-compliant reset supervision for Infineon AURIX TC3xx MCU; responds to battery dips below 4.63V. Use Value: Ensures deterministic boot state after vehicle start-stop cycles; meets ISO 16750-2 pulse 4 transient immunity requirements. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Powers safety-critical motor control MCU in battery-backed infusion pump operating from 3.3V LDO. IC Role / Device Role / Timing Role: Generates active-high reset on VCC drop below 4.63V; manual reset triggered by front-panel emergency stop button. Use Value: Guarantees fail-safe shutdown and restart sequence compliant with IEC 62304 Class C software requirements. | Use Scenario: Supervises 3.3V supply in ANSI C12.22-compliant meter with real-time clock and secure bootloader. IC Role / Device Role / Timing Role: Asserts reset during AC line dropout or supercapacitor discharge; MR pin tied to tamper-detection switch. Use Value: Maintains data integrity during power interruption; satisfies ANSI C12.1-2017 brownout immunity clause. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6319LHUK46CY-T | Active-low push/pull reset output; identical 4.63V threshold, 140ms timeout, and MR functionality | Requires redesign of reset signal polarity handling in target MCU; incompatible with active-high-only reset inputs | Select when interfacing with legacy MCUs requiring active-low reset assertion |
| TLV803EB46DBZR | 4.63V threshold, 140ms timeout, active-high push/pull, but no MR input; SOT23-5 package | Lacks manual reset capability; unsuitable where emergency hardware reset is mandated by safety standard | Choose only for cost-sensitive, MR-free designs where functional equivalence is limited to voltage monitoring |
Compared with MAX6319MHUK46CY-T, MAX6319LHUK46CY-T offers identical supervision specs but inverted reset polarity, while TLV803EB46DBZR omits manual reset entirely - both require board-level validation for signal integrity, timing margin, and thermal derating in automotive or industrial deployments.
Availability
MAX6319MHUK46CY-T is available at Aetrix Electronics and suitable for industrial PLC control, automotive body controllers, medical infusion pumps, and smart energy meters requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.
Supply support for MAX6319MHUK46CY-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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6316–MAX6322 product line delivers highly integrated, factory-trimmed supervisory circuits targeting space-constrained, high-reliability embedded systems requiring guaranteed reset behavior across extreme temperatures and supply transients.
FAQ
What is the exact reset threshold voltage of MAX6319MHUK46CY-T and how tightly is it specified?
The MAX6319MHUK46CY-T has a factory-trimmed nominal reset threshold of 4.63V, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed in Table 1 of the datasheet and corresponds to the "46" suffix in the part number. The MAX6319MHUK46CY-T does not drift beyond these limits under specified conditions, ensuring consistent brownout detection across automotive and industrial environments.
Does MAX6319MHUK46CY-T include a watchdog timer function?
No, the MAX6319MHUK46CY-T does not include a watchdog timer. Per the Selector Guide and Ordering Information table, only MAX6316/MAX6317/MAX6318/MAX6320/MAX6321 variants feature watchdog input (WDI); MAX6319 and MAX6322 parts omit this function entirely. The MAX6319MHUK46CY-T provides voltage monitoring and manual reset only - its "MH" prefix denotes active-high reset output and absence of watchdog circuitry.
What is the function of Pin 4 on MAX6319MHUK46CY-T, and how should it be handled on the PCB?
Pin 4 of the MAX6319MHUK46CY-T is a no-connect (NC) terminal - it is unconnected internally and serves no electrical function. Per Maxim's Pin Description and Typical Operating Circuit diagrams, Pin 4 must be left floating or tied to GND for mechanical stability; it must never be connected to VCC or any active signal. This NC designation is consistent across all MAX6319 variants in SOT23-5 packaging and is explicitly documented in the pin configuration figures.
How does the manual reset (MR) input behave on MAX6319MHUK46CY-T, and what is its minimum pulse width?
The MR input on MAX6319MHUK46CY-T is active-low with an internal 52kΩ pullup to VCC. Pulling MR ≤0.3×VCC asserts reset for the full 140ms timeout period after MR returns high. Its minimum valid pulse width is 1.5µs over the full temperature range (-40°C to +125°C), as specified in the Electrical Characteristics table. The MAX6319MHUK46CY-T requires no external debounce components - a simple momentary switch from MR to GND suffices for field-service reset functionality.
Is MAX6319MHUK46CY-T qualified for automotive applications, and what evidence supports this claim?
Yes, the MAX6319MHUK46CY-T is AEC-Q100 qualified. This is explicitly stated in the "Benefits and Features" section of the datasheet ("AEC-Q100 Qualified") and reinforced by its -40°C to +125°C operating temperature range, which meets Grade 1 automotive requirements. The "/V" suffix denotes automotive qualification in other variants, but AEC-Q100 compliance applies to all standard versions including MAX6319MHUK46CY-T - confirmed by Maxim's product change notices and qualification reports referenced in the datasheet revision history.
MAX6319MHUK46CY-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6319MHUK46CY-T FAQ
1.How can I place an order for MAX6319MHUK46CY-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319MHUK46CY-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 MAX6319MHUK46CY-T reliable?
The price and inventory of MAX6319MHUK46CY-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319MHUK46CY-T is usually 5 days.
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MAX6319MHUK46CY-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319MHUK46CY-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 MAX6319MHUK46CY-T?
For technical support, including MAX6319MHUK46CY-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319MHUK46CY-T requirements.
6.How does Aetrix verify that MAX6319MHUK46CY-T is sourced from the original manufacturer or authorized distributors?
All MAX6319MHUK46CY-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 MAX6319MHUK46CY-T meets industry standards.
7.What is the process for return or replacement of MAX6319MHUK46CY-T?
All MAX6319MHUK46CY-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319MHUK46CY-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 MAX6319MHUK46CY-T part is unused and in its original packaging.
Return procedure for MAX6319MHUK46CY-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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