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Analog Devices Inc./Maxim Integrated MAX6315US50D2+T
- Part No.:
- MAX6315US50D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US50D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,374
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Product details
Overview
MAX6315US50D2+T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain active-low RESET signal when voltage falls below 5.0V threshold or upon manual reset assertion. It features a factory-trimmed 5.0V reset threshold (±3.5% over -40°C to +125°C), 20ms minimum reset timeout period, 5μA typical supply current at 5.5V, and operates across -40°C to +125°C. It is used in battery-powered controllers and embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6315US50D2+T datasheet, MAX6315US50D2+T pinout, MAX6315US50D2+T application, or MAX6315US50D2+T equivalent, this page provides verified technical context, precise timing behavior, SOT23 package details, reset threshold accuracy vs. temperature, and validated alternatives for industrial-grade μP reset supervision.
Technical Context
The MAX6315US50D2+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 5.0V nominal reset threshold, with ±3.5% tolerance over full temperature range. Its internal timer generates a guaranteed-minimum 20ms reset pulse after VCC recovery or MR deassertion.
It uses an open-drain n-channel MOSFET output stage allowing RESET to be pulled up to any voltage ≤6.0V - including supplies higher than VCC - enabling level-shifted reset signaling. The MR input includes a 63kΩ internal pullup and rejects transients <100ns, eliminating external debounce components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 5.0V nominal, ±3.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature extremes |
| Reset Timeout Period | 20ms minimum (D2 variant) - guarantees sufficient reset hold time for microcontrollers with slow clock startup |
| Supply Current | 5μA typical at 5.5V, -40°C to +85°C - enables multi-year operation in coin-cell–powered IoT sensors |
| RESET Output Type | Open-drain, capable of sinking 3.2mA at VCC > 4.25V - supports flexible pullup to 3.3V, 5V, or mixed-supply reset buses |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial PLC, and high-reliability embedded applications |
| MR Input Threshold | VIL = 0.8V (VTH > 4.0V), VIH = 2.4V - compatible with standard 3.3V/5V logic without level-shifting |
| VCC Range | 1.0V to 5.5V - functions down to near-fully-depleted battery voltages while maintaining RESET assertion |
Pinout & Package
MAX6315US50D2+T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for space-constrained portable and modular designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and reset timer; must be connected directly to system ground plane |
| 2 (RESET) | Active-low open-drain output | Drives low during reset; requires external pullup (e.g., 10kΩ) to target supply (≤6V); supports level shifting |
| 3 (MR) | Manual reset input | Logic-low assertion forces RESET active; internal 63kΩ pullup allows NC connection if unused |
| 4 (VCC) | Supply and monitor input | Power source and monitored rail; internal divider senses voltage drop relative to 5.0V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 5.0V ±3.5% over full -40°C to +125°C range - eliminates calibration and reduces BOM count vs. discrete resistor-divider solutions |
| Guaranteed-minimum 20ms reset timeout | Ensures compatibility with μPs requiring ≥16ms reset pulse width (e.g., ARM Cortex-M0+, PIC18F), even at temperature extremes |
| Open-drain RESET with 6V absolute max rating | Enables direct interface to 3.3V, 5V, or 1.8V reset inputs without level shifters - simplifies multi-rail system design |
| Immunity to short VCC transients | Rejects glitches <100ns duration - prevents spurious resets from switching noise or ESD-induced supply dips |
| Ultra-low 5μA supply current | Reduces quiescent power in always-on monitoring circuits - critical for battery-backed real-time clocks and wake-up supervisors |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 5V system rail in programmable logic controller during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to ARM Cortex-M7 MCU during brownout conditions. Use Value: Maintains 5.0V threshold accuracy within ±3.5% at 125°C ambient, preventing false resets during thermal stress. |
Use Scenario: Provides power-on and brownout reset for microcontroller in door module exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Supervisory circuit generating 20ms minimum reset pulse synchronized to 5V supply ramp-up after ignition. Use Value: Open-drain RESET output pulled to 3.3V domain enables safe reset signaling across isolated power domains. |
| Portable Medical Sensor Hub | Smart Energy Meter |
|
Use Scenario: Ensures deterministic startup of ultra-low-power BLE SoC powered by single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Resets SoC when battery voltage drops below 5.0V - triggered via external resistor divider scaling VBAT to VCC pin. Use Value: 5μA ICC enables >10-year shelf life in sealed sensor units with primary lithium batteries. |
Use Scenario: Supervises 5V auxiliary supply powering metrology ASIC and RTC in DIN-rail mounted meter. IC Role / Device Role / Timing Role: Asserts RESET during AC line dropout or surge-induced rail collapse, holding μC in reset until stable recovery. Use Value: Immunity to <100ns transients prevents nuisance resets during relay switching or lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US50D2+T | Same 5.0V threshold and 20ms timeout, but bidirectional reset pin supporting μCs with shared reset/IRQ functionality | Required only when target microcontroller uses reset pin for both reset assertion and interrupt signaling | Select MAX6314US50D2+T only if bidirectional I/O capability is explicitly needed; otherwise MAX6315US50D2+T offers lower cost and simpler layout |
| TPS3808G50DBVR | 5.0V threshold with 20ms timeout, but push-pull RESET output (not open-drain); 2.5V to 6.0V VCC range | Lacks level-shifting capability - cannot drive RESET lines referenced to supplies higher than VCC | Choose TPS3808G50DBVR only in single-supply systems where push-pull drive simplifies termination; MAX6315US50D2+T preferred for multi-rail isolation |
Compared with MAX6314US50D2+T and TPS3808G50DBVR, the MAX6315US50D2+T uniquely combines open-drain level-shifting, ultra-low 5μA quiescent current, and guaranteed 20ms minimum timeout - making it optimal for space- and power-constrained industrial and automotive reset supervision where supply-domain isolation is required.
Availability
MAX6315US50D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical sensor hubs, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US50D2+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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX6315 series was designed specifically for robust, low-power microprocessor reset supervision in harsh environments - emphasizing precision threshold stability, wide temperature operation, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the MAX6315US50D2+T?
The MAX6315US50D2+T has a nominal reset threshold of 5.0V, with guaranteed tolerance of ±3.5% over the full operating temperature range of -40°C to +125°C. This value is factory-laser-trimmed and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" with test conditions confirming performance across temperature extremes. The MAX6315US50D2+T does not require external calibration.
Does the MAX6315US50D2+T support level shifting for the RESET output?
Yes, the MAX6315US50D2+T features an open-drain RESET output rated for up to 6.0V, allowing it to be pulled up to a voltage higher than its own VCC supply - for example, pulling RESET to 3.3V while VCC is 5.0V, or vice versa. This enables true level shifting between power domains, a key advantage over push-pull reset supervisors. The MAX6315US50D2+T's datasheet confirms this capability in both Absolute Maximum Ratings and Detailed Description sections.
What is the minimum reset timeout period for the MAX6315US50D2+T?
The MAX6315US50D2+T has a minimum reset timeout period of 20ms, corresponding to the "D2" suffix in its part number. This value is guaranteed over -40°C to +125°C and is validated in the Electrical Characteristics table under "Reset Timeout Period (tRP)" for the MAX6315US__D2-T variant. The MAX6315US50D2+T delivers consistent 20ms hold time regardless of VCC ramp rate or temperature drift.
Can the MR pin of the MAX6315US50D2+T be left unconnected?
Yes, the MR pin of the MAX6315US50D2+T includes an internal 63kΩ pullup resistor, so it may be left floating (no connection) if manual reset functionality is not required. When used, MR accepts logic-low signals down to 0.8V (for VTH > 4.0V) and is immune to transients shorter than 100ns. The MAX6315US50D2+T datasheet explicitly states "Connect to VCC if not used," confirming safe NC operation.
What package type and footprint does the MAX6315US50D2+T use?
The MAX6315US50D2+T uses a 4-pin SOT23 package (Analog Devices package code U4+1), with outline drawing 21-0052 and land pattern 90-0183. Its dimensions are 1.3mm × 2.9mm × 0.95mm, compatible with standard SOT23 pick-and-place equipment and reflow profiles. The MAX6315US50D2+T top mark is HBAA, and the package is RoHS-compliant and lead-free.
MAX6315US50D2+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:
- 5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US50D2+T FAQ
1.How can I place an order for MAX6315US50D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US50D2+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 MAX6315US50D2+T reliable?
The price and inventory of MAX6315US50D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US50D2+T is usually 5 days.
3.What payment methods are accepted for MAX6315US50D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US50D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US50D2+T?
MAX6315US50D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US50D2+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 MAX6315US50D2+T?
For technical support, including MAX6315US50D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US50D2+T requirements.
6.How does Aetrix verify that MAX6315US50D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US50D2+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 MAX6315US50D2+T meets industry standards.
7.What is the process for return or replacement of MAX6315US50D2+T?
All MAX6315US50D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US50D2+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 MAX6315US50D2+T part is unused and in its original packaging.
Return procedure for MAX6315US50D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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