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Analog Devices Inc./Maxim Integrated MAX6315US31D3+T
- Part No.:
- MAX6315US31D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US31D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:11,345
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Product details
Overview
MAX6315US31D3+T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain reset signal when voltage falls below 3.08V or upon manual reset assertion. It provides a factory-trimmed 140ms (min) reset timeout period, 5μA supply current at +25°C, and operates across -40°C to +125°C for use in battery-powered controllers and industrial μP systems.
For engineers reviewing the MAX6315US31D3+T datasheet, MAX6315US31D3+T pinout, MAX6315US31D3+T application, or MAX6315US31D3+T equivalent, key selection criteria include its 3.08V reset threshold, 140ms minimum timeout, SOT23-4 package, open-drain RESET output compatible with voltages up to +6V, and guaranteed operation over extended temperature range.
Technical Context
The MAX6315US31D3+T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider setting nominal VTH = 3.08V ±3.5% over -40°C to +125°C. Its internal timer generates a fixed 140ms (min) reset pulse after VCC recovery or MR deassertion.
It features an integrated 63kΩ MR pullup resistor, 100ns MR glitch rejection, and open-drain RESET capable of sinking 3.2mA at VCC > 4.25V while supporting level-shifting-e.g., monitoring a 3.3V rail while pulling RESET to a 5V domain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 3.08V - Factory-trimmed threshold ensures accurate brownout detection for 3.3V systems |
| tRP Min | 140ms - Guarantees sufficient reset hold time for μP initialization sequences |
| ICC Max | 15μA at +125°C - Enables ultra-low-power operation in battery-backed instrumentation |
| Operating Temp | -40°C to +125°C - Qualified for under-hood automotive and industrial control environments |
| RESET Output | Open-drain, 6V max pullup - Allows level-shifted reset signaling across mixed-supply systems |
| MR Input | Internal 63kΩ pullup - Eliminates external components for manual reset implementation |
Pinout & Package
Supplied in a 4-pin SOT23 package (U4+1 outline), footprint-compatible with industry-standard 1.3mm × 2.9mm land pattern 90-0183.
| 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 during reset; requires external pullup (e.g., 10kΩ) to any supply ≤6V |
| 3 MR | Manual reset input | Logic-low assertion forces reset; internally pulled up to VCC (63kΩ); debounced by design |
| 4 VCC | Supply and monitor input | Powers device and feeds internal voltage divider; monitors same rail it supplies current to |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08V ±3.5% over full temperature range enables reliable 3.3V system brownout detection without calibration |
| Fixed 140ms timeout | Guaranteed minimum duration eliminates need for external RC timing components in μP startup sequencing |
| Open-drain RESET | Supports voltage-level translation-e.g., monitoring 3.3V VCC while pulling RESET to 5V logic domain |
| MR internal pullup | 63kΩ resistor allows direct switch-to-ground connection without external biasing components |
| Low ICC | 5μA typical at +25°C reduces quiescent load on coin-cell or energy-harvesting power sources |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Power cycling during field maintenance or transient line disturbances in factory automation cabinets. IC Role / Device Role / Timing Role: Supervisory circuit asserting hardware reset to prevent μP lockup during 3.3V rail sag. Use Value: 3.08V threshold matches nominal 3.3V supply tolerance; 140ms timeout exceeds typical ARM Cortex-M boot sequence latency. | Use Scenario: Intermittent solar charging causing slow VCC ramp-up and brownout events in remote environmental sensors. IC Role / Device Role / Timing Role: Voltage monitor triggering controlled restart after energy storage recovers above operational threshold. Use Value: 5μA supply current extends multi-year battery life; open-drain RESET enables direct interface with 1.8V μC reset pin via 2.2kΩ pullup. |
| Automotive Body Control Modules | Medical Handheld Diagnostics |
Use Scenario: Load-dump transients and cold-crank voltage dips in 12V-derived 3.3V domains near engine bay. IC Role / Device Role / Timing Role: Brownout detector holding reset active until stable 3.3V rail is re-established post-cranking. Use Value: -40°C to +125°C rating covers under-hood thermal extremes; 100ns MR glitch rejection suppresses EMI-induced false resets. | Use Scenario: USB-powered diagnostics devices requiring fail-safe restart after accidental cable disconnect/reconnect. IC Role / Device Role / Timing Role: System supervisor ensuring deterministic state recovery after power interruption. Use Value: Manual reset via tactile switch (MR-to-GND) provides field-serviceable recovery without firmware intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D2+T | Same 3.08V threshold but 20ms (min) reset timeout | Suitable for faster-booting microcontrollers where 140ms is excessive | Select when shorter reset hold time aligns with μP reset timing requirements |
| TLV803EC26DBZR | 3.08V threshold, 200ms (typ) timeout, 1.8–6V VCC range, SOT23-3 | Lacks MR input; smaller 3-pin package limits manual reset capability | Choose only if manual reset is unnecessary and board space is constrained |
Compared with MAX6315US31D2+T and TLV803EC26DBZR, the MAX6315US31D3+T uniquely delivers both precise 3.08V monitoring and a guaranteed 140ms minimum reset pulse with integrated manual reset-enabling robust recovery in systems where extended initialization or field serviceability is required.
Availability
MAX6315US31D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US31D3+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
Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The MAX6315 series is part of Analog Devices' precision supervisory IC portfolio, engineered for reliable power-on reset, brownout protection, and manual reset functionality in space-constrained, low-power μP systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US31D3+T?
The MAX6315US31D3+T has a factory-trimmed nominal reset threshold voltage of 3.08V, with tolerance of ±3.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table under "Reset Threshold (VTH)".
What is the guaranteed minimum reset timeout period for the MAX6315US31D3+T?
The MAX6315US31D3+T guarantees a minimum reset timeout period (tRP) of 140ms after VCC rises above the reset threshold or after manual reset (MR) is deasserted. This value is valid across the full temperature range and appears in the Ordering Information and Electrical Characteristics tables.
Does the MAX6315US31D3+T support manual reset functionality?
Yes, the MAX6315US31D3+T includes a dedicated MR (manual reset) input (Pin 3) with an internal 63kΩ pullup resistor. A logic-low pulse ≥1μs on MR asserts reset, and the device holds RESET active for the full 140ms timeout after MR returns high-no external components required for basic implementation.
Can the RESET output of the MAX6315US31D3+T be pulled up to a voltage higher than VCC?
Yes, the MAX6315US31D3+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) while monitoring a lower VCC rail such as 3.3V-enabling level-shifted reset signaling in mixed-supply systems.
What package type and footprint does the MAX6315US31D3+T use?
The MAX6315US31D3+T is housed in a 4-pin SOT23 package (package code U4+1, outline 21-0052), with a standardized 1.3mm × 2.9mm footprint (land pattern 90-0183). It is RoHS-compliant and tape-and-reel packaged (+T suffix).
MAX6315US31D3+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:
- 3.08V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US31D3+T FAQ
1.How can I place an order for MAX6315US31D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US31D3+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 MAX6315US31D3+T reliable?
The price and inventory of MAX6315US31D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US31D3+T is usually 5 days.
3.What payment methods are accepted for MAX6315US31D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US31D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US31D3+T?
MAX6315US31D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US31D3+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 MAX6315US31D3+T?
For technical support, including MAX6315US31D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US31D3+T requirements.
6.How does Aetrix verify that MAX6315US31D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US31D3+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 MAX6315US31D3+T meets industry standards.
7.What is the process for return or replacement of MAX6315US31D3+T?
All MAX6315US31D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US31D3+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 MAX6315US31D3+T part is unused and in its original packaging.
Return procedure for MAX6315US31D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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