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Analog Devices Inc./Maxim Integrated MAX6394US300D1+T
- Part No.:
- MAX6394US300D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6394US300D1+T.pdf
- Description:
- IC MPU/RESET CIRC 3.0V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,060
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Product details
Overview
MAX6394US300D1+T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and provides a debounced manual reset input. It asserts an active-low open-drain RESET signal when VCC drops below 3.003V (±1% over −40°C to +125°C) or MR is pulled low, with a factory-programmed 0.7ms minimum reset timeout period. It operates from 1.0V to 5.5V and draws only 5µA at +25°C, targeting battery-powered μP systems requiring high-accuracy power monitoring.
For engineers reviewing the MAX6394US300D1+T datasheet, MAX6394US300D1+T pinout, MAX6394US300D1+T application, or MAX6394US300D1+T equivalent, key selection criteria include its ±1.0% reset threshold accuracy across temperature, SOT143-4 package compatibility, 0.7ms reset timeout, immunity to short VCC transients, and ability to level-shift RESET above VCC using an external pullup.
Technical Context
The MAX6394US300D1+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set a nominal 3.003V reset threshold, maintaining ±1.0% accuracy from −40°C to +125°C. Its reset timeout is fixed at 0.7ms (min), generated by an internal RC timer independent of external components.
It features an integrated 63kΩ MR pullup resistor and accepts MR logic-low pulses as short as 1µs, with 100ns glitch rejection. The open-drain RESET output sinks up to 3.2mA at VCC > 4.25V and supports pullup voltages up to +6.0V - enabling level-shifting between monitored and reset-logic supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.003V ±1.0% (−40°C to +125°C); ensures reliable brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 0.7ms (min); guarantees sufficient processor initialization time after VCC recovery |
| Supply Current | 5µA (typ at +25°C, VCC = 5.5V); enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V; supports single-supply monitoring for 1.8V, 3.3V, and 5V systems |
| MR Input Threshold | VIL = 0.3 × VCC (VTH < 4.0V); allows direct interface with standard CMOS logic without level translation |
| RESET Output Type | Open-drain n-channel MOSFET; permits pullup to any voltage ≤6.0V, enabling supply-domain isolation |
| Package | SOT143-4 (4-pin); 1.3mm × 2.1mm footprint ideal for space-constrained portable designs |
Pinout & Package
SOT143-4 package: 4-pin surface-mount, lead-free, RoHS-compliant, thermal resistance qJA = 290°C/W (four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal circuitry and RESET sink current; must be connected directly to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Drives low during reset; requires external pullup (e.g., 10kΩ) to define logic-high level - may exceed VCC up to +6.0V |
| MR (Pin 3) | Manual reset input | Logic-low assertion triggers reset; internal 63kΩ pullup allows NC connection; 1µs minimum pulse width supported |
| VCC (Pin 4) | Supply and monitor input | Power source and monitored rail; internal divider compares against laser-trimmed threshold; valid down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.003V with ±1.0% tolerance over full −40°C to +125°C range eliminates calibration and external resistor networks |
| 0.7ms minimum reset timeout | Guarantees μP core and peripherals stabilize before release - no external capacitor or timing component required |
| Open-drain RESET with 6V tolerance | Enables level-shifting between disparate supply domains (e.g., 3.3V VCC monitored, 5V RESET pullup) |
| 5µA quiescent current | Extends battery life in always-on monitoring applications such as smart sensors and wearables |
| Immunity to sub-100ns VCC glitches | Prevents spurious resets during ESD events or switching noise without external RC filtering |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable wake-up and brownout protection during battery depletion. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET until VCC stabilizes above 3.003V during cold start or voltage sag. Use Value: Prevents firmware corruption by guaranteeing ≥0.7ms reset hold time while consuming only 5µA - extending operational life beyond 3 years. | Use Scenario: Door module MCU operating in vehicle cabin where 12V supply fluctuates during load-dump or cranking. IC Role / Device Role / Timing Role: Monitors local 3.3V LDO output; asserts RESET on dips below 3.003V and holds for 0.7ms after recovery. Use Value: Maintains ±1.0% threshold accuracy across −40°C to +125°C, ensuring deterministic reset behavior under extreme thermal stress. |
| Industrial PLC I/O Subsystems | Handheld Test Equipment |
Use Scenario: Remote analog input card powered from isolated 5V DC-DC converter, subject to transient coupling from adjacent motor drives. IC Role / Device Role / Timing Role: Detects VCC droop caused by shared rail impedance; uses 100ns MR glitch rejection to ignore noise-induced false triggers. Use Value: Eliminates need for external debounce RC network while providing robust immunity to fast transients per Typical Operating Characteristics graph toc06. | Use Scenario: Battery-operated multimeter with auto-power-down and instant-on capability via momentary MR switch. IC Role / Device Role / Timing Role: Provides hardware reset initiation through MR pin with internal 63kΩ pullup - no external resistor needed. Use Value: Reduces BOM count and PCB area; MR accepts 1µs pulses, enabling responsive user-initiated reset even during low-power sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | Fixed 3.0V threshold (±0.5% at +25°C, ±1.5% over temp); 200ms default timeout; 1.4µA ICC | Higher accuracy at room temp but wider tolerance over temperature; longer timeout limits use in fast-recovery systems | Select if ultra-low ICC dominates design priority and 200ms reset hold is acceptable |
| ADM6315-30ARTZ-RL7 | 3.0V threshold (±2.0% over −40°C to +85°C); 240ms timeout; SOT23-4 package; no MR input | Lacks manual reset functionality and has reduced temperature range and accuracy vs. MAX6394US300D1+T | Choose only for cost-sensitive, non-automotive applications where MR is unnecessary and extended temp range is not required |
Compared with TPS3808G30DBVR and ADM6315-30ARTZ-RL7, the MAX6394US300D1+T offers tighter ±1.0% threshold stability across −40°C to +125°C, a shorter 0.7ms timeout for rapid system recovery, and integrated MR with internal pullup - making it optimal for AEC-Q100–qualified portable and automotive edge nodes.
Availability
MAX6394US300D1+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, and industrial PLC I/O subsystems requiring stable component supply, long-term lifecycle support, and guaranteed AEC-Q100 qualification.
Supply support for MAX6394US300D1+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 MAX6394 family delivers high-accuracy, low-power supervisory circuits for microprocessor reset generation - engineered specifically for systems where supply stability, temperature resilience, and minimal BOM overhead are critical.
FAQ
What is the exact reset threshold voltage of the MAX6394US300D1+T?
The MAX6394US300D1+T has a factory-trimmed nominal reset threshold of 3.003V, with guaranteed tolerance of ±1.0% across the full operating temperature range of −40°C to +125°C. This value is confirmed in Table 2 of the official datasheet and applies specifically to the "300" suffix variant. The MAX6394US300D1+T does not require external calibration or trimming to achieve this accuracy.
Does the MAX6394US300D1+T support manual reset functionality?
Yes, the MAX6394US300D1+T includes a dedicated MR (manual reset) input on Pin 3. A logic-low pulse ≥1µs on MR asserts RESET immediately and holds it active for the full 0.7ms timeout period after MR returns high. An internal 63kΩ pullup resistor allows MR to be left unconnected if unused - eliminating the need for an external pullup resistor in most designs.
Can the RESET output of the MAX6394US300D1+T be pulled up to a voltage higher than VCC?
Yes, the MAX6394US300D1+T features an open-drain RESET output rated for voltages up to +6.0V, regardless of VCC level. This allows level-shifting - for example, monitoring a 3.3V VCC while pulling RESET up to a 5V domain. The datasheet specifies absolute maximum ratings of −0.3V to +6.0V on the RESET pin, and the output can safely sink up to 3.2mA when VCC > 4.25V.
What is the supply current consumption of the MAX6394US300D1+T at different temperatures?
The MAX6394US300D1+T draws 5µA typical supply current at +25°C with VCC = 5.5V. At −40°C to +85°C, ICC remains ≤12µA; at −40°C to +125°C, it increases to ≤15µA. These values are measured with no load and reflect true quiescent operation - critical for battery longevity in always-on monitoring applications using the MAX6394US300D1+T.
Is the MAX6394US300D1+T qualified for automotive applications?
Yes, the MAX6394US300D1+T is AEC-Q100 qualified for Grade 1 (−40°C to +125°C), as explicitly stated in the Benefits and Features section of the datasheet. This qualification covers stress testing for temperature cycling, humidity, and reliability - confirming suitability for under-hood and cabin automotive electronics where the MAX6394US300D1+T performs critical power-supply supervision.
MAX6394US300D1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.003V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 700µs Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6394US300D1+T FAQ
1.How can I place an order for MAX6394US300D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6394US300D1+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 MAX6394US300D1+T reliable?
The price and inventory of MAX6394US300D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6394US300D1+T is usually 5 days.
3.What payment methods are accepted for MAX6394US300D1+T?
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4.How is shipping managed for MAX6394US300D1+T?
MAX6394US300D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6394US300D1+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 MAX6394US300D1+T?
For technical support, including MAX6394US300D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6394US300D1+T requirements.
6.How does Aetrix verify that MAX6394US300D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6394US300D1+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 MAX6394US300D1+T meets industry standards.
7.What is the process for return or replacement of MAX6394US300D1+T?
All MAX6394US300D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6394US300D1+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 MAX6394US300D1+T part is unused and in its original packaging.
Return procedure for MAX6394US300D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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