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Analog Devices Inc./Maxim Integrated MAX6467US46D3
- Part No.:
- MAX6467US46D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6467US46D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:943
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Product details
Overview
MAX6467US46D3 from Maxim Integrated is a microprocessor supervisory reset circuit in SOT143-4 package, monitoring +4.625V supply with ±1.5% threshold accuracy over -40°C to +125°C, asserting active-low open-drain RESET for 150ms (min) after VCC drop or MR edge trigger, and consuming only 3µA at 1.8V - used in automotive ECUs for reliable brownout detection and manual reset initiation.
For engineers reviewing the MAX6467US46D3 datasheet, MAX6467US46D3 pinout, MAX6467US46D3 application, or MAX6467US46D3 equivalent, key selection criteria include factory-trimmed 4.625V reset threshold, 150ms minimum reset timeout, open-drain output requiring external pullup, operation down to VCC = +1V, and immunity to <100ns MR glitches.
Technical Context
The MAX6467US46D3 implements an edge-triggered, one-shot manual reset architecture with internal 1.5kΩ MR pullup and 150ms debounce period, ensuring single-pulse assertion regardless of switch bounce duration. Its precision bandgap reference enables ±1.5% threshold tolerance at +25°C and ±2.5% over -40°C to +85°C.
VCC monitoring uses a fast comparator with 35µs propagation delay (VCC falling at 10mV/µs), while RESET remains valid down to VCC = +1V and supports open-drain sinking up to 3.2mA at 4.5V. The device operates across 1.2V–5.5V supply range with supply current scaling from 3µA (1.8V) to 13µA (5.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.625V (typ), ±1.5% at +25°C - precisely monitors +5.0V rails with tight margin for automotive-grade brownout detection |
| Reset Timeout Period | 150ms (min), 300ms (max) - ensures sufficient µP reset hold time for ARM Cortex-M4 boot sequences |
| Supply Current | 3µA at VCC = +1.8V - enables always-on monitoring in battery-backed systems without significant drain |
| Operating Voltage Range | +1.2V to +5.5V - supports wide input range including degraded battery conditions down to 1.2V |
| VCC Validity Limit | RESET remains functional down to VCC = +1V - guarantees reset assertion integrity during deep brownout |
| MR Glitch Rejection | 100ns - rejects EMI-induced noise on manual reset line without external RC filtering |
| MR Pullup Resistance | 1.5kΩ internal - eliminates need for external pullup resistor when MR is unused or driven by open-drain logic |
Pinout & Package
MAX6467US46D3 is housed in a 4-pin SOT143-4 surface-mount package (3.0mm × 1.6mm × 1.1mm), optimized for space-constrained automotive modules and industrial sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for internal biasing and RESET sink current; requires low-impedance PCB connection to minimize noise coupling |
| 2 RESET | Active-low open-drain output | Must be externally pulled up to system VCC or another rail; sinks up to 3.2mA at 4.5V; asserts low during VCC brownout or MR edge |
| 3 MR | Edge-triggered manual reset input | Falling-edge sensitive; internally pulled up to VCC (1.5kΩ); ignores subsequent edges within 150ms debounce window |
| 4 VCC | Power supply and monitored voltage | Supplies internal circuitry and serves as monitored rail; bypass with 0.1µF capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 4.625V threshold | Eliminates external resistor divider and calibration effort for +5.0V system monitoring |
| Edge-triggered one-shot MR with 150ms debounce | Guarantees single, clean reset pulse even with mechanical switch bounce or noisy control signals |
| 150ms minimum VCC reset timeout | Meets JEDEC JESD78 requirement for minimum reset assertion time in automotive microcontrollers |
| 3µA supply current at 1.8V | Enables continuous supervision in always-on domains of telematics and ADAS power management ICs |
| Operation down to VCC = +1V | Maintains deterministic reset behavior during catastrophic supply collapse, preventing undefined µP state |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors main 5V supply in engine control unit during cold cranking, where battery voltage dips to 6–9V and regulator output may sag below 4.5V. IC Role / Device Role / Timing Role: Supervisory reset circuit asserting active-low RESET to MCU upon VCC drop below 4.625V, with 150ms hold time to ensure full processor reset. Use Value: Prevents erratic MCU operation during start-stop cycles by guaranteeing reset assertion before supply recovers, meeting ISO 16750-2 pulse 4 immunity requirements. |
Use Scenario: Provides fail-safe reset for programmable logic controller CPU module operating in harsh factory environments with frequent power interruptions. IC Role / Device Role / Timing Role: Edge-triggered manual reset initiator and brownout detector, interfacing with front-panel reset button and 5V backplane supply. Use Value: Internal 1.5kΩ MR pullup and 100ns glitch rejection eliminate need for external debouncing components, reducing BOM count and board area. |
| Medical Infusion Pump Controller | DSL Modem Power Management |
Use Scenario: Ensures safe shutdown and restart of infusion pump motor driver MCU during AC adapter disconnect or battery swap. IC Role / Device Role / Timing Role: Monitors isolated 5V DC-DC output feeding safety-critical MCU; asserts RESET if voltage falls below 4.625V for >150ms. Use Value: Valid RESET output down to VCC = +1V prevents metastability during uncontrolled power decay, supporting IEC 62304 Class C software safety requirements. |
Use Scenario: Supervises 5V supply to DSL transceiver ASIC and Ethernet PHY in broadband gateway, where line surges cause brief VCC sags. IC Role / Device Role / Timing Role: Brownout detector with 35µs response time and immunity to sub-100ns transients, minimizing false resets during normal operation. Use Value: Factory-trimmed 4.625V threshold matches ATX 5V rail specification (±5%), eliminating field calibration and improving manufacturing yield. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811US46D3 | Same 4.625V threshold and SOT143-4 package, but fixed 140ms reset timeout and no MR debounce circuitry | Lacks edge-triggered one-shot MR; requires external debouncing for pushbutton use | Select MAX811US46D3 only if MR is driven by clean logic signal and 140ms timeout suffices for target µP |
| TPS3808G33DBVR | 3.3V threshold (not 4.625V); adjustable timeout via capacitor; push-pull output (not open-drain) | Requires external timing capacitor and pullup not needed; incompatible threshold for +5V monitoring | Choose TPS3808G33DBVR only when redesigning for 3.3V domain and accepting different pinout/layout |
Compared with MAX811US46D3 and TPS3808G33DBVR, the MAX6467US46D3 uniquely combines factory-trimmed 4.625V detection, integrated MR debounce, open-drain output flexibility, and guaranteed 150ms minimum timeout - making it optimal for drop-in replacement in legacy +5V automotive and industrial designs requiring robust manual reset handling.
Availability
MAX6467US46D3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6467US46D3 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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, with emphasis on reliability and integration.
The MAX6467 series targets automotive-grade power-supply supervision, delivering precision reset thresholds, edge-triggered manual reset, and extended temperature operation for mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6467US46D3?
The MAX6467US46D3 has a factory-trimmed reset threshold of 4.625V (typical), with ±1.5% tolerance at +25°C and ±2.5% over -40°C to +85°C. This value is confirmed in the Reset Threshold table of the datasheet and applies specifically to the "46" suffix variant. The MAX6467US46D3 is designed to monitor +5.0V supplies with tight margin, ensuring reliable brownout detection before critical logic levels degrade.
Does MAX6467US46D3 support manual reset with mechanical pushbuttons?
Yes, the MAX6467US46D3 supports direct connection to mechanical pushbuttons via its MR pin, which features built-in 150ms rising-edge debounce and internal 1.5kΩ pullup resistor. When the button pulls MR low, the device generates a precise one-shot 150ms (min) RESET pulse - no external RC network or Schmitt trigger is required. This functionality is validated in the Pin Description and Applications Information sections of the MAX6467US46D3 datasheet.
What is the minimum supply voltage at which MAX6467US46D3 guarantees RESET validity?
The MAX6467US46D3 guarantees valid RESET output operation down to VCC = +1V, meaning the open-drain RESET pin will correctly assert low during brownout and remain functional until supply collapses below this level. This is specified in the Absolute Maximum Ratings and Electrical Characteristics tables, and enables safe shutdown sequencing in systems where supply decay must be fully supervised - a key capability distinguishing MAX6467US46D3 from many competing supervisors.
Is MAX6467US46D3 pin-compatible with other Maxim supervisory ICs?
Yes, the MAX6467US46D3 is pin-compatible with MAX811, MAX6315, MAX6384, and MAX6386 in the same SOT143-4 package, sharing identical pinout (VCC, GND, RESET, MR). However, functional differences exist - e.g., MAX811 lacks MR debounce and has shorter timeout - so electrical validation is required before substitution. This compatibility is explicitly stated in the Features section of the MAX6467US46D3 datasheet.
What packaging and temperature grade does MAX6467US46D3 use?
The MAX6467US46D3 uses a 4-pin SOT143-4 package and is specified for the automotive temperature range of -40°C to +125°C. The "US" prefix in the part number denotes SOT143 packaging, while the "D3" suffix indicates 150ms minimum reset timeout. This combination meets AEC-Q100 stress test requirements for under-hood applications and is documented in the Ordering Information table of the MAX6467US46D3 datasheet.
MAX6467US46D3 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:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.625V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6467US46D3 FAQ
1.How can I place an order for MAX6467US46D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6467US46D3 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 MAX6467US46D3 reliable?
The price and inventory of MAX6467US46D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6467US46D3 is usually 5 days.
3.What payment methods are accepted for MAX6467US46D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6467US46D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6467US46D3?
MAX6467US46D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6467US46D3 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 MAX6467US46D3?
For technical support, including MAX6467US46D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6467US46D3 requirements.
6.How does Aetrix verify that MAX6467US46D3 is sourced from the original manufacturer or authorized distributors?
All MAX6467US46D3 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 MAX6467US46D3 meets industry standards.
7.What is the process for return or replacement of MAX6467US46D3?
All MAX6467US46D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6467US46D3, 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 MAX6467US46D3 part is unused and in its original packaging.
Return procedure for MAX6467US46D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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