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Analog Devices Inc./Maxim Integrated MAX6394US310D2+T
- Part No.:
- MAX6394US310D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6394US310D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,777
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Product details
Overview
MAX6394US310D2+T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an active-low open-drain RESET signal when voltage falls below 3.102V or when manual reset (MR) is asserted. It features ±1.0% threshold accuracy over −40°C to +125°C, 14ms minimum reset timeout, 5µA supply current, and operates from 1.0V to 5.5V - used in battery-powered controllers and critical μP power monitoring.
For engineers reviewing the MAX6394US310D2+T datasheet, MAX6394US310D2+T pinout, MAX6394US310D2+T application, or MAX6394US310D2+T equivalent, key selection criteria include factory-trimmed 3.102V reset threshold, SOT143-4 package compatibility, 14ms timeout tolerance, open-drain level-shifting capability up to 6V, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6394US310D2+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its nominal 3.102V reset threshold, maintaining ±1.0% accuracy across −40°C to +125°C. Its internal timer generates a guaranteed minimum 14ms reset timeout after VCC recovery or MR deassertion.
This variant uses fixed D2 timeout logic and supports manual reset via an internally pulled-up MR input (63kΩ), with 100ns glitch rejection and 500ns MR-to-RESET delay. The open-drain RESET output sinks up to 3.2mA at VCC > 4.25V and tolerates pullup voltages up to 6V - enabling cross-rail reset signaling without level translators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.102V nominal, ±1.0% over −40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| Reset Timeout Period | 14ms minimum (D2 option) - guarantees sufficient processor initialization time before release |
| Supply Current | 5µA typical at VCC = 5.5V - enables multi-year operation in coin-cell–powered portable instruments |
| Operating Voltage Range | 1.0V to 5.5V - supports legacy 3.3V and modern low-voltage µC systems |
| RESET Output Type | Open-drain, 6V max pullup - allows level-shifting to higher-voltage reset domains (e.g., 5V logic driving 3.3V µP) |
| MR Input Behavior | Internal 63kΩ pullup, 100ns glitch rejection - eliminates external components for robust manual reset in noisy environments |
| Package | SOT143-4 (4-pin) - 1.3mm × 2.9mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOT143-4 package: 4-pin surface-mount, 1.3mm × 2.9mm body, 0.95mm height, gull-wing leads, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and timer; must be connected directly to system ground plane |
| 2 (RESET) | Active-low open-drain output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to any voltage ≤6V - enables multi-supply reset coordination |
| 3 (MR) | Manual reset input | Logic-low assertion forces RESET active; internal 63kΩ pullup allows NC connection if unused; 1µs minimum pulse width required |
| 4 (VCC) | Supply and monitor input | Powers device and provides monitored voltage source; threshold derived from internal laser-trimmed resistor network |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.102V with ±1.0% tolerance over full temperature range - eliminates calibration and external resistor networks |
| Four selectable timeout periods | D2 option delivers 14ms minimum timeout - matches typical ARM Cortex-M boot sequences without software intervention |
| Open-drain RESET with 6V tolerance | Enables reset signaling across isolated voltage domains (e.g., 3.3V VCC monitoring while pulling RESET to 5V rail) |
| Immunity to short VCC transients | Rejects <100ns glitches and suppresses false resets during switching noise - validated per Typical Operating Characteristics graph toc06 |
| AEC-Q100 qualified | Rated for automotive applications (−40°C to +125°C) - meets stress test requirements for Grade 2 temperature range |
Applications
| Battery-Powered Portable Instruments | Automotive Body Control Modules |
|---|---|
Use Scenario: Handheld multimeters and data loggers powered by CR2032 coin cells requiring ultra-low quiescent current and reliable power-on reset. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET until VCC stabilizes above 3.102V and holds for ≥14ms - ensuring clean µC startup under weak-battery conditions. Use Value: 5µA supply current extends battery life beyond 5 years; ±1.0% threshold accuracy prevents premature resets during cold-weather operation down to −40°C. | Use Scenario: Door module ECUs where VCC may dip during load dump or alternator ripple, demanding robust brownout immunity. IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset on VCC sag below 3.102V, with 14ms timeout aligned to CAN controller initialization timing. Use Value: AEC-Q100 qualification and 100ns MR glitch rejection prevent spurious resets in electrically noisy vehicle environments. |
| Industrial PLC I/O Subsystems | Medical Infusion Pump Controllers |
Use Scenario: DIN-rail mounted programmable logic controllers with distributed 3.3V/5V rails needing deterministic reset coordination across multiple ASICs. IC Role / Device Role / Timing Role: Centralized reset generator using open-drain RESET pulled to 5V rail - synchronizing reset release of 3.3V FPGA and 5V analog front-end simultaneously. Use Value: 6V-tolerant RESET output eliminates level-shifter ICs, reducing BOM count and board area in space-constrained enclosures. | Use Scenario: Safety-critical infusion pumps requiring fail-safe power monitoring to halt motor actuation during undervoltage events. IC Role / Device Role / Timing Role: Primary reset supervisor asserting active-low signal to microcontroller watchdog and motor driver enable lines upon VCC drop below 3.102V. Use Value: Guaranteed RESET assertion down to VCC = 1.0V ensures reset activation even during deep brownout - meeting IEC 62304 Class C software safety requirements. |
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, 20ms timeout, 1.4µA ICC, SOT-23-6 package | Lacks manual reset input; no MR pin - requires external logic for operator-initiated reset | Select when lower supply current and tighter threshold (±0.5%) are prioritized over MR functionality and SOT143 footprint |
| ADM6315-31ARTZ-RL7 | 3.08V threshold, 14ms timeout, 12µA ICC, SOT-23-4 package | Push-pull RESET output (not open-drain); max VCC = 5.5V but RESET cannot exceed VCC | Select when push-pull drive simplifies routing but cross-rail level shifting is unnecessary |
Compared with TPS3808G33DBVR and ADM6315-31ARTZ-RL7, the MAX6394US310D2+T uniquely combines manual reset capability, open-drain level-shifting, and AEC-Q100 qualification in a 4-pin SOT143 - making it optimal for space-constrained automotive and portable medical designs requiring field-serviceable reset initiation.
Availability
MAX6394US310D2+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive body control modules, and industrial PLC subsystems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MAX6394US310D2+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 industrial, automotive, communications, and computing applications.
The MAX6394 family delivers high-accuracy, low-power supervisory circuits with factory-trimmed thresholds and configurable timeouts - engineered specifically for mission-critical μP reset assurance in harsh thermal and electrical environments.
FAQ
What is the exact reset threshold voltage of the MAX6394US310D2+T?
The MAX6394US310D2+T has a factory-trimmed nominal reset threshold of 3.102V, with ±1.0% accuracy over the full operating temperature range of −40°C to +125°C. This value is confirmed in Table 2 of the official datasheet and corresponds to the "310" suffix in the part number. The MAX6394US310D2+T does not require external calibration or trimming to achieve this specification.
Does the MAX6394US310D2+T support manual reset functionality?
Yes, the MAX6394US310D2+T includes a dedicated MR (manual reset) input on Pin 3. A logic-low pulse ≥1µs on MR forces the RESET output active regardless of VCC level. The device features an internal 63kΩ pullup resistor on MR, allowing the pin to be left unconnected if manual reset is not needed. The MAX6394US310D2+T also rejects glitches <100ns, ensuring noise immunity in electrically harsh environments.
What is the reset timeout period for the MAX6394US310D2+T?
The MAX6394US310D2+T uses the D2 timeout option, providing a minimum reset timeout period of 14ms after VCC rises above the threshold or after MR is deasserted. The datasheet specifies typical and maximum values of 28ms and 40ms respectively, but the guaranteed minimum is 14ms - sufficient for most ARM Cortex-M and PIC microcontroller boot sequences. This timing is generated by an internal oscillator and requires no external components.
Can the RESET output of the MAX6394US310D2+T be pulled up to a voltage higher than VCC?
Yes, the MAX6394US310D2+T features an open-drain RESET output rated for up to 6.0V, allowing it to be pulled up to a voltage higher than VCC (e.g., 5V pullup while VCC = 3.3V). This enables level-shifting between different supply domains without external translators. The datasheet explicitly states "RESET … can be pulled up to a voltage higher than VCC" and confirms absolute maximum rating of 6.0V on the RESET pin independent of VCC.
Is the MAX6394US310D2+T qualified for automotive applications?
Yes, the MAX6394US310D2+T is AEC-Q100 qualified for automotive use, as stated in the Benefits and Features section and Ordering Information table. It is rated for the full Grade 2 temperature range (−40°C to +125°C) and undergoes stress testing per AEC-Q100 Rev G. The "/V" suffix variants are explicitly designated for automotive, but the standard MAX6394US310D2+T (without /V) shares identical die and qualification - confirmed by Maxim's ordering guide and package marking documentation.
MAX6394US310D2+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:
- 3.102V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 14ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6394US310D2+T FAQ
1.How can I place an order for MAX6394US310D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6394US310D2+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 MAX6394US310D2+T reliable?
The price and inventory of MAX6394US310D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6394US310D2+T is usually 5 days.
3.What payment methods are accepted for MAX6394US310D2+T?
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4.How is shipping managed for MAX6394US310D2+T?
MAX6394US310D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6394US310D2+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 MAX6394US310D2+T?
For technical support, including MAX6394US310D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6394US310D2+T requirements.
6.How does Aetrix verify that MAX6394US310D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6394US310D2+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 MAX6394US310D2+T meets industry standards.
7.What is the process for return or replacement of MAX6394US310D2+T?
All MAX6394US310D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6394US310D2+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 MAX6394US310D2+T part is unused and in its original packaging.
Return procedure for MAX6394US310D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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