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Analog Devices Inc./Maxim Integrated MAX6319LHUK29C+T
- Part No.:
- MAX6319LHUK29C+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6319LHUK29C+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,844
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Product details
Overview
MAX6319LHUK29C+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 2.93V 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 MAX6319LHUK29C+T datasheet, MAX6319LHUK29C+T pinout, MAX6319LHUK29C+T application, or MAX6319LHUK29C+T equivalent, key selection criteria include reset threshold accuracy (±1.5% at +25°C), MR input glitch rejection (100ns), supply current (≤12µA at 3.6V), and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6319LHUK29C+T implements a precision voltage monitor with factory-laser-trimmed resistive divider setting VRST = 2.93V ±1.5% at +25°C and ±2.5% over –40°C to +125°C. Its reset generator asserts active-low RESET for ≥140ms after VCC rises above threshold or after MR release.
No watchdog timer is integrated - the device omits WDI functionality per Selector Guide and ordering code "LH" (no "W/X/Y/Z" suffix). It features CMOS push/pull output capable of sourcing ≥500µA and sinking ≥1.2mA at VCC ≥2.7V, with guaranteed VOL ≤0.3V and VOH ≥0.8×VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% at +25°C; ensures reliable detection of 3.3V rail brownout before system instability |
| Reset Timeout Period | 140ms min; holds processor in reset long enough for power rails and clocks to stabilize |
| Supply Voltage Range | 1.0V to 5.5V; supports operation during deep brownout and enables use with Li-ion, 3.3V, and 5V systems |
| Supply Current | 3µA typical at 3.6V; minimizes battery drain in portable/battery-powered equipment |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial embedded applications |
| Reset Output Type | Active-low, push/pull; eliminates need for external pullup resistor and drives heavy capacitive loads directly |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC; compatible with 3.3V and 5V logic families without level-shifting |
Pinout & Package
MAX6319LHUK29C+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 gull-wing leads optimized for automated assembly and thermal performance (θJA = 255.9°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives microprocessor reset pin low during fault; actively pulls high when deasserted - no external pullup required |
| 2 - GND | Ground reference | Low-impedance return path for internal comparators and output stage; must be connected to system ground plane |
| 3 - MR | Active-low manual reset input | Pulling low forces reset for full 140ms timeout; internal 52kΩ pullup allows direct switch-to-ground connection |
| 4 - NC | No connect | Pin 4 is unconnected internally; must remain floating or tied to GND per layout guidelines - not usable as signal |
| 5 - VCC | Supply voltage input | Monitored power rail input; reset asserts when VCC falls below 2.93V; absolute max rating = +6V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Validated for automotive applications including engine control units and ADAS modules requiring extended temperature and reliability compliance |
| No external components required | Integrates precision voltage reference, timing capacitor, and push/pull driver - reduces BOM count and PCB area vs discrete solutions |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout, preventing partial initialization or undefined MCU state |
| 100ns MR input glitch rejection | Filters noise on manual reset line without external RC filtering - simplifies front-panel button interface design |
| Factory-trimmed 2.93V threshold | Eliminates need for external resistor divider calibration; achieves ±1.5% tolerance at +25°C without user trimming |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
Use Scenario: Battery-powered handheld medical device operating from single-cell Li-ion (2.7–4.2V) with strict low-power requirements. IC Role / Device Role / Timing Role: Supervisory IC monitors VCC and asserts reset if voltage drops below 2.93V during discharge or cold start. Use Value: Prevents MCU from executing corrupted code during brownout; 3µA quiescent current extends battery life between charges. | Use Scenario: Industrial PLC module with isolated I/O and real-time Ethernet interface requiring deterministic boot sequence. IC Role / Device Role / Timing Role: Provides 140ms power-on reset pulse synchronized to 3.3V rail stabilization, ensuring FPGA configuration completes before CPU initialization. Use Value: Eliminates race conditions between power rails and clock domains; push/pull output drives 50pF load with <25ns rise time. |
| Automotive Body Electronics | Intelligent Instruments |
Use Scenario: Automotive door module exposed to -40°C to +125°C ambient with 12V supply regulation to 3.3V. IC Role / Device Role / Timing Role: Monitors regulated 3.3V rail and asserts reset on undervoltage; MR pin enables service-mode forced reset via diagnostic tool. Use Value: AEC-Q100 qualification ensures reliability across temperature extremes; ±2.5% threshold tolerance over full range prevents false resets. | Use Scenario: Portable oscilloscope with ARM Cortex-M7 MCU and analog front-end requiring clean startup after battery insertion. IC Role / Device Role / Timing Role: Generates precise 140ms reset pulse upon battery connection, holding MCU in reset until ADC reference stabilizes. Use Value: Factory-trimmed 2.93V threshold matches nominal 3.3V rail with margin; no calibration needed in production test. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6319MHUK29C+T | Bidirectional active-low reset output (not push/pull); includes internal 4.7kΩ pullup + active P-FET | Required for interfacing with Motorola 68HC11 or other µPs with bidirectional reset pins | Select MAX6319MHUK29C+T only when µP reset pin must drive low *and* sense external reset assertion |
| TLV809K29DBZR | Single-channel supervisor with 2.93V threshold and 200ms reset timeout; no MR input; SOT23-3 package | Lacks manual reset and uses smaller 3-pin footprint - suitable for space-constrained designs where MR is unnecessary | Choose TLV809K29DBZR when board space is critical and manual reset functionality is omitted from system architecture |
Compared with MAX6319MHUK29C+T, the MAX6319LHUK29C+T offers simpler push/pull drive but no bidirectional capability; versus TLV809K29DBZR, it adds MR functionality and tighter reset timing control at the cost of one extra pin.
Availability
MAX6319LHUK29C+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded control systems, and automotive body electronics requiring stable component supply, AEC-Q100 compliance, and long-term industrial lifecycle support.
Supply support for MAX6319LHUK29C+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 demanding industrial, automotive, and computing applications.
The MAX6316–MAX6322 family delivers highly integrated, factory-trimmed supervisory circuits targeting systems where deterministic reset behavior, low power, and small footprint are essential - especially in battery-operated and automotive environments.
FAQ
What is the reset threshold voltage of the MAX6319LHUK29C+T and how accurate is it?
The MAX6319LHUK29C+T has a factory-trimmed reset threshold of 2.93V, specified as ±1.5% at +25°C and ±2.5% over the full –40°C to +125°C operating range. This accuracy is achieved via laser trimming of internal resistors and ensures reliable detection of 3.3V rail brownout without external calibration. The MAX6319LHUK29C+T does not require any external components to achieve this specification.
Does the MAX6319LHUK29C+T include a watchdog timer function?
No, the MAX6319LHUK29C+T does not include a watchdog timer. Its ordering code "LH" indicates active-low push/pull reset and manual reset (MR) only - the absence of a "W", "X", "Y", or "Z" suffix confirms watchdog functionality is omitted. For watchdog capability, consider MAX6318LHUK29C+T or MAX6316LHUK29C+T instead.
What is the function of Pin 4 on the MAX6319LHUK29C+T?
Pin 4 on the MAX6319LHUK29C+T is a no-connect (NC) terminal - it is not bonded internally and serves no electrical function. Per Maxim's land pattern guidance, Pin 4 must remain unconnected on the PCB; tying it to GND or VCC is not recommended and may affect thermal or mechanical performance.
Can the MAX6319LHUK29C+T operate with a supply voltage below 2.93V?
Yes, the MAX6319LHUK29C+T operates from 1.0V to 5.5V and guarantees valid reset output down to VCC = 1V. When VCC falls below 2.93V, RESET is asserted low; when VCC rises above 2.93V, RESET remains low for 140ms before deasserting. This ensures robust behavior even during deep brownout conditions where VCC recovers slowly.
Is the MAX6319LHUK29C+T qualified for automotive applications?
Yes, the MAX6319LHUK29C+T is AEC-Q100 qualified (Grade 1: –40°C to +125°C), making it suitable for automotive body electronics, infotainment, and ADAS subsystems. Its guaranteed parameter performance across temperature, ESD robustness, and manufacturing traceability meet automotive OEM requirements - confirmed in the official Maxim datasheet Rev 14.
MAX6319LHUK29C+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:
- 2.93V
- 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
MAX6319LHUK29C+T FAQ
1.How can I place an order for MAX6319LHUK29C+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319LHUK29C+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 MAX6319LHUK29C+T reliable?
The price and inventory of MAX6319LHUK29C+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319LHUK29C+T is usually 5 days.
3.What payment methods are accepted for MAX6319LHUK29C+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6319LHUK29C+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6319LHUK29C+T?
MAX6319LHUK29C+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319LHUK29C+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 MAX6319LHUK29C+T?
For technical support, including MAX6319LHUK29C+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319LHUK29C+T requirements.
6.How does Aetrix verify that MAX6319LHUK29C+T is sourced from the original manufacturer or authorized distributors?
All MAX6319LHUK29C+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 MAX6319LHUK29C+T meets industry standards.
7.What is the process for return or replacement of MAX6319LHUK29C+T?
All MAX6319LHUK29C+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319LHUK29C+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 MAX6319LHUK29C+T part is unused and in its original packaging.
Return procedure for MAX6319LHUK29C+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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