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Analog Devices Inc./Maxim Integrated MAX6394US317D4+T
- Part No.:
- MAX6394US317D4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6394US317D4+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,910
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Product details
Overview
MAX6394US317D4+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 features a factory-trimmed 3.168V reset threshold (±1% over -40°C to +125°C), 826ms minimum reset timeout period, 5µA supply current, and open-drain RESET output capable of being pulled up to 6V - used in battery-powered controllers and critical μP power monitoring.
For engineers reviewing the MAX6394US317D4+T datasheet, MAX6394US317D4+T pinout, MAX6394US317D4+T application, or MAX6394US317D4+T equivalent, key selection criteria include reset threshold accuracy across temperature, immunity to short VCC transients, SOT143 package footprint compatibility, and open-drain level-shifting capability for multi-rail systems.
Technical Context
The MAX6394US317D4+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 3.168V reset threshold, and an internal monostable timer that guarantees RESET remains asserted for ≥826ms after VCC rises above threshold or MR deasserts. Its reset assertion logic is edge- and level-sensitive, with glitch rejection on MR input and immunity to sub-100ns VCC transients.
It uses an open-drain n-channel MOSFET for RESET output, enabling pullup to any voltage ≤6V independent of VCC - supporting level-shifted reset signaling between disparate supply domains. The device operates from 1.0V to 5.5V VCC and maintains functional reset assertion down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.168V ±1% from -40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges. |
| Reset Timeout Period | 826ms minimum - guarantees sufficient processor initialization time after power recovery. |
| Supply Current | 5µA typical at +25°C - enables ultra-low-power operation in battery-backed systems. |
| Operating Voltage Range | 1.0V to 5.5V - supports wide-input monitoring including 1.8V, 3.3V, and 5V rails. |
| MR Input Threshold | VIL = 0.3 × VCC, VIH = 0.7 × VCC - compatible with standard CMOS logic levels across VCC range. |
| RESET Output Type | Open-drain, rated to 6V - allows pullup to higher-voltage rails (e.g., 5V) while monitoring 3.3V VCC. |
| Tempco | 60 ppm/°C - limits threshold drift to <±30mV over full temperature range. |
Pinout & Package
Package: SOT143-4 (4-pin, 1.3mm × 2.9mm, 0.95mm height), RoHS-compliant, tape-and-reel packaging (2.5k/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection. |
| 2 (RESET) | Active-low open-drain output | Asserts logic-low during reset; requires external pullup resistor (e.g., 10kΩ) to target rail (≤6V). |
| 3 (MR) | Manual reset input | Logic-low initiates reset; includes 63kΩ internal pullup - can be left floating if unused. |
| 4 (VCC) | Supply voltage and monitor input | Power source and monitored rail; internally divided to compare against 3.168V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.168V with ±1% tolerance over -40°C to +125°C - eliminates need for external resistor network calibration. |
| Four selectable timeout periods | 826ms minimum for MAX6394US317D4+T - matches long-boot microcontrollers without requiring external timing components. |
| Open-drain RESET with 6V rating | Enables level-shifting: e.g., monitor 3.3V VCC while pulling RESET to 5V logic domain - no level translator IC needed. |
| Immunity to short VCC transients | Rejects glitches <100ns duration - prevents spurious resets during switching noise or ESD events. |
| Ultra-low quiescent current | 5µA typical - extends battery life in portable equipment by minimizing standby power draw. |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered from 3.3V rails operating in factory environments with voltage sags and EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during brownout to prevent firmware corruption and ensure deterministic restart. Use Value: 3.168V threshold aligns precisely with 3.3V system margin; 826ms timeout accommodates slow-starting FPGA configuration. | Use Scenario: Handheld glucose meters using coin-cell batteries with declining voltage profiles. IC Role / Device Role / Timing Role: Monitors battery voltage and triggers controlled shutdown/reset before data loss occurs. Use Value: 5µA supply current minimizes drain on CR2032; ±1% threshold stability ensures consistent low-battery detection across temperature. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: 12V-to-3.3V converted subsystems subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Resets microcontroller when VCC dips below safe operating level during cranking. Use Value: Immunity to <100ns transients prevents false resets; AEC-Q100 qualification confirms reliability for automotive use. | Use Scenario: Meters with isolated communication interfaces requiring synchronized power-up sequencing. IC Role / Device Role / Timing Role: Generates clean, extended reset pulse to coordinate MCU, RTC, and isolation barrier initialization. Use Value: 826ms timeout exceeds typical isolation transformer startup delay; open-drain output interfaces directly to isolated side logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.5µA ICC, SOT23-5 package | Lacks manual reset input; tighter threshold tolerance (±0.5%) but shorter timeout | Select when minimal current draw and high threshold accuracy are prioritized over manual reset and long timeout. |
| ADM6315-33ARJZ-RL7 | 3.3V threshold, 200ms timeout, 10µA ICC, SOT23-4 package, no MR input | No manual reset function; higher supply current; same SOT23 footprint but different pinout | Choose for cost-sensitive designs where MR is unnecessary and 200ms reset suffices. |
Compared with TPS3808G33DBVR and ADM6315-33ARJZ-RL7, the MAX6394US317D4+T uniquely combines 3.168V precision threshold, 826ms timeout, debounced MR input, and open-drain level-shifting - making it optimal for battery-powered and multi-rail embedded systems requiring robust, configurable reset behavior.
Availability
MAX6394US317D4+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and smart energy meters requiring stable component supply, long-lifecycle support, and AEC-Q100-qualified reliability.
Supply support for MAX6394US317D4+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 series delivers high-accuracy, low-power supervisory functions for microprocessor-based systems - targeting applications where voltage monitoring integrity, thermal stability, and layout simplicity are critical.
FAQ
What is the exact reset threshold voltage of the MAX6394US317D4+T?
The MAX6394US317D4+T has a factory-trimmed nominal reset threshold of 3.168V, with guaranteed tolerance of ±1% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during manufacturing and documented in Tables 1 and 2 of the official datasheet.
Does the MAX6394US317D4+T support manual reset functionality?
Yes, the MAX6394US317D4+T includes a dedicated MR (Manual Reset) input (Pin 3) that asserts reset when pulled low. It features internal 63kΩ pullup resistance, allowing direct connection of a momentary switch to GND without external components - and provides 100ns glitch rejection for noise immunity.
What is the reset timeout period for the MAX6394US317D4+T?
The MAX6394US317D4+T provides a minimum reset timeout period of 826ms after VCC rises above the 3.168V threshold or after MR is deasserted. Typical and maximum values are 1570ms and 2240ms respectively, per the D4 timeout option in the Electrical Characteristics table.
Can the RESET output of the MAX6394US317D4+T be pulled up to a voltage higher than VCC?
Yes, the MAX6394US317D4+T features an open-drain RESET output rated to 6.0V, allowing it to be pulled up to a voltage higher than VCC (e.g., 5V) while monitoring a lower VCC rail such as 3.3V - enabling level-shifted reset signaling without additional interface circuitry.
Is the MAX6394US317D4+T qualified for automotive applications?
Yes, the MAX6394US317D4+T is AEC-Q100 qualified for automotive use. The datasheet explicitly states AEC-Q100 qualification in the Benefits and Features section, and the ordering information includes /V suffix variants designated for automotive-grade screening and testing.
MAX6394US317D4+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.168V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 826ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6394US317D4+T FAQ
1.How can I place an order for MAX6394US317D4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6394US317D4+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 MAX6394US317D4+T reliable?
The price and inventory of MAX6394US317D4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6394US317D4+T is usually 5 days.
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Once your MAX6394US317D4+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 MAX6394US317D4+T?
For technical support, including MAX6394US317D4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6394US317D4+T requirements.
6.How does Aetrix verify that MAX6394US317D4+T is sourced from the original manufacturer or authorized distributors?
All MAX6394US317D4+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 MAX6394US317D4+T meets industry standards.
7.What is the process for return or replacement of MAX6394US317D4+T?
All MAX6394US317D4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6394US317D4+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 MAX6394US317D4+T part is unused and in its original packaging.
Return procedure for MAX6394US317D4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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