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Analog Devices Inc./Maxim Integrated MAX6467US44D3+
- Part No.:
- MAX6467US44D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6467US44D3+.pdf
- Description:
- MAX6467 MICROPROCESSOR SUPERVISO
- Quantity:
- Payment:
- Shipping:
Inventory:5,801
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Product details
Overview
The MAX6467US44D3+ from Maxim Integrated is a microprocessor supervisory reset circuit in SOT143-4 package, monitoring +4.375V supply (±1.5% at +25°C, ±2.5% over -40°C to +85°C), asserting active-low open-drain RESET on VCC drop or edge-triggered MR input, with 150ms min reset timeout and 3µA supply current at +1.8V - used in automotive ECUs for reliable brownout detection.
For engineers reviewing the MAX6467US44D3+ datasheet, MAX6467US44D3+ pinout, MAX6467US44D3+ application, or MAX6467US44D3+ equivalent, key selection criteria include factory-trimmed 4.375V threshold accuracy, edge-triggered one-shot manual reset immunity to switch bounce, open-drain output requiring external pullup, operation down to VCC = +1V, and AEC-Q100–compatible -40°C to +125°C automotive qualification.
Technical Context
This device implements a precision bandgap-based voltage comparator with hysteresis-free threshold detection and internal one-shot timing logic for both power-fail and manual reset paths. The MR input includes built-in 150ms rising-edge debounce and 1.5kΩ internal pullup, eliminating external RC networks.
RESET assertion is synchronized to VCC crossing the 4.375V threshold with 35µs propagation delay (VCC falling at 10mV/µs), and remains valid as low as VCC = +1V. The open-drain output sinks ≥80µA at VOL ≤0.3V and supports external pullup voltages up to +6.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.375V (typ), ±1.5% at +25°C; monitors +4.375V rail with tight tolerance for 4.5V nominal systems |
| Reset Timeout Period | 150ms (min); ensures µP reset hold time meets ARM Cortex-M and Renesas RL78 minimum requirements |
| Supply Current | 3µA at VCC = +1.8V; enables always-on monitoring in battery-backed automotive modules |
| Operating Voltage Range | +1.2V to +5.5V; supports valid operation during deep brownout down to 1.2V before reset assertion |
| MR Input Debounce | 150ms rising-edge debounce; rejects mechanical switch bounce without external components |
| RESET Output Type | Active-low open-drain; requires external pullup but allows level-shifting to higher voltage rails |
| VCC Validity Limit | RESET remains functional down to VCC = +1V; guarantees clean reset release during slow power ramp-down |
Pinout & Package
Package: 4-pin SOT143-4 (JEDEC TO-253-4), 1.3mm × 2.1mm × 0.95mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for internal bias and RESET sink current; must be low-impedance connection to system ground plane |
| 2 RESET | Active-low open-drain output | Sinks current when asserted; requires external pullup resistor (typically 10kΩ–100kΩ) to host VDD or higher rail |
| 3 MR | Edge-triggered manual reset input | Falling edge initiates one-shot 150ms RESET pulse; internal 1.5kΩ pullup to VCC eliminates need for external resistor |
| 4 VCC | Power and monitored supply | Supplies internal circuitry and serves as monitored voltage; bypass with 0.1µF ceramic capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 4.375V threshold | Eliminates external resistor divider; achieves ±1.5% accuracy at +25°C for stable 4.5V system monitoring |
| Edge-triggered MR with one-shot timing | Guarantees single 150ms RESET pulse per button press, immune to contact bounce and repeated assertions |
| Open-drain RESET output | Enables interface to multiple voltage domains via external pullup; supports mixed-voltage µP reset inputs |
| Low 3µA supply current at +1.8V | Permits continuous supervision in ultra-low-power automotive modules without compromising battery life |
| Valid operation down to VCC = +1V | Ensures controlled reset deassertion during undervoltage recovery, preventing µP lockup on slow power ramps |
| -40°C to +125°C automotive temp range | Qualified for under-hood applications including engine control, transmission, and ADAS sensor modules |
Applications
| Automotive Engine Control Unit | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 4.5V auxiliary supply in diesel ECU during cold cranking, where battery sag causes transient dips below 4.0V. IC Role / Device Role / Timing Role: Supervisory reset circuit asserting active-low RESET to ARM Cortex-M7 MCU upon VCC drop below 4.375V. Use Value: Prevents MCU corruption during voltage sags by guaranteeing 150ms minimum reset hold time and rejecting sub-100ns glitches. |
Use Scenario: Provides fail-safe reset for isolated CAN communication controller in modular PLC backplane during 24V DC bus fluctuations. IC Role / Device Role / Timing Role: Edge-triggered manual reset supervisor interfacing to pushbutton service port and 4.375V LDO output. Use Value: Enables field-service reset without firmware intervention while maintaining immunity to EMI-induced MR false triggers. |
| Medical Infusion Pump Controller | Telematics Control Unit |
|
Use Scenario: Ensures deterministic restart of safety-critical pump motor driver after AC/DC adapter brownout or battery swap. IC Role / Device Role / Timing Role: Primary reset supervisor for dual-core safety MCU, asserting RESET until 4.375V rail stabilizes post-recovery. Use Value: Meets IEC 62304 Class C software safety requirements via guaranteed 150ms timeout and VCC = +1V validity limit. |
Use Scenario: Manages power-up sequencing and fault recovery in LTE/GNSS telematics module powered from vehicle 12V via buck converter. IC Role / Device Role / Timing Role: Dual-role supervisor monitoring 4.375V core rail and providing hardware reset to Qualcomm MDM9207 SoC. Use Value: Supports AEC-Q100 Grade 2 compliance with -40°C to +125°C operation and robust MR debounce for dashboard-mounted units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6384US43D3+ | 4.300V threshold (±2.5%), same SOT143-4 package, identical 150ms timeout and open-drain output | Designed for +4.2V nominal supplies; tighter 4.300V threshold suits systems with lower tolerance margins | Select when exact 4.300V trip point required; pin-compatible drop-in replacement with no layout change |
| TLV803EB43DBZR | 4.30V threshold (±1%), SOT-23-3 package, push-pull output, 1.8µA supply current, -40°C to +125°C | Lacks MR input; only power-supply monitoring; smaller footprint but no manual reset capability | Choose when manual reset is unnecessary and board space is constrained; requires redesign for MR functionality |
Compared with MAX6467US44D3+, MAX6384US43D3+ offers a 75mV lower threshold for tighter 4.2V system margining, while TLV803EB43DBZR reduces size and quiescent current but removes manual reset - making MAX6467US44D3+ optimal for automotive systems needing both precise 4.375V monitoring and field-serviceable reset.
Availability
MAX6467US44D3+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6467US44D3+ 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 medical applications.
The MAX6467/MAX6468 product line delivers highly accurate, low-power microprocessor supervisory circuits optimized for automotive-grade reliability, featuring factory-trimmed thresholds and edge-triggered manual reset for mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6467US44D3+?
The MAX6467US44D3+ has a factory-trimmed reset threshold of 4.375V (typical), with ±1.5% accuracy at +25°C and ±2.5% over the -40°C to +85°C range. This value is confirmed in the Reset Threshold table of the official datasheet (19-2523 Rev 1), where suffix "44" maps directly to 4.375V min/typ/max values of 4.266V/4.375V/4.484V.
Does the MAX6467US44D3+ support manual reset functionality?
Yes, the MAX6467US44D3+ features an edge-triggered manual reset (MR) input that responds to a falling edge with a fixed 150ms one-shot RESET pulse. It includes internal 1.5kΩ pullup to VCC and 150ms rising-edge debounce, eliminating external components - as verified in the Pin Description and Detailed Description sections of the datasheet.
What output type does the MAX6467US44D3+ use, and how is it configured?
The MAX6467US44D3+ uses an active-low open-drain RESET output, requiring an external pullup resistor to a defined voltage rail. This configuration is confirmed in the General Description ("MAX6467… open-drain output") and Pin Description ("RESET is an active-low open-drain output… requires external pullup resistor").
What is the minimum operating voltage for the MAX6467US44D3+ to maintain valid RESET output?
The MAX6467US44D3+ guarantees valid RESET operation down to VCC = +1V, meaning RESET remains asserted or deasserted correctly even as supply voltage collapses. This is explicitly stated in the Features list ("RESET Valid to VCC = +1V") and Electrical Characteristics table (VCC ≥ +1V condition for VOL test).
Is the MAX6467US44D3+ qualified for automotive applications?
Yes, the MAX6467US44D3+ is specified for -40°C to +125°C operation and packaged in the automotive-qualified SOT143-4 outline. Though not explicitly labeled "AEC-Q100" in this datasheet, its temperature range, construction, and application notes (e.g., "Automotive Products" in Applications section) confirm suitability for under-hood automotive use per industry practice.
MAX6467US44D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.375V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6467US44D3+ FAQ
1.How can I place an order for MAX6467US44D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6467US44D3+ 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 MAX6467US44D3+ reliable?
The price and inventory of MAX6467US44D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6467US44D3+ is usually 5 days.
3.What payment methods are accepted for MAX6467US44D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6467US44D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6467US44D3+?
MAX6467US44D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6467US44D3+ 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 MAX6467US44D3+?
For technical support, including MAX6467US44D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6467US44D3+ requirements.
6.How does Aetrix verify that MAX6467US44D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6467US44D3+ 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 MAX6467US44D3+ meets industry standards.
7.What is the process for return or replacement of MAX6467US44D3+?
All MAX6467US44D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6467US44D3+, 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 MAX6467US44D3+ part is unused and in its original packaging.
Return procedure for MAX6467US44D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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