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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:2,477
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Product details
Overview
The MAX6315US31D3-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 3.08V or when manual reset (MR) is asserted. It guarantees reset assertion for ≥140ms after recovery, draws only 5μA at 5.5V, and operates across -40°C to +125°C in a 4-pin SOT23 package - used in battery-powered controllers and industrial μP systems requiring reliable brownout detection.
For engineers reviewing the MAX6315US31D3-T datasheet, MAX6315US31D3-T pinout, MAX6315US31D3-T application, or MAX6315US31D3-T equivalent, key selection criteria include its factory-trimmed 3.08V reset threshold, 140ms minimum timeout, open-drain output compatible with supplies up to 6V, guaranteed operation over temperature, and immunity to short VCC transients.
Technical Context
The MAX6315US31D3-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set a nominal 3.08V reset threshold, with ±3.5% tolerance over -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed reset timeout period of ≥140ms (min) after VCC rises above threshold or MR deasserts.
It features an open-drain n-channel MOSFET RESET output capable of sinking 3.2mA at VCC > 4.25V while allowing pullup to voltages up to 6V - enabling level-shifting between monitored and reset-logic supplies. The MR input includes a 63kΩ internal pullup and rejects glitches <100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal, ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 3.3V systems. |
| Reset Timeout Period | ≥140ms (min) - holds μP in reset long enough for stable power-up sequencing. |
| Supply Current | 5μA typical at 5.5V - enables multi-year battery life in portable equipment. |
| Operating Temp Range | -40°C to +125°C - supports automotive under-hood and industrial control environments. |
| RESET Output Type | Open-drain, 6V max pullup - allows interface with higher-voltage logic or level-shifted reset domains. |
| MR Input Logic | Active-low with 63kΩ internal pullup - eliminates external components for manual reset implementation. |
Pinout & Package
MAX6315US31D3-T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance. |
| RESET | Active-low open-drain output | Sinks current when asserted; requires external pullup to define logic-high level (0–6V). |
| MR | Manual reset input | Active-low trigger; internally pulled up to VCC; debounced via 100ns glitch rejection. |
| VCC | Supply and monitor input | Powers device and provides voltage reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.08V threshold | Eliminates external resistor network and calibration, reducing BOM count and layout area in 3.3V systems. |
| 140ms minimum reset timeout | Ensures sufficient hold time for slow-ramping power supplies and complex μP initialization sequences. |
| 5μA supply current | Minimizes quiescent drain on coin-cell or Li-ion backup supplies in always-on monitoring applications. |
| Open-drain RESET with 6V tolerance | Enables direct interfacing with 5V or 3.3V μP reset inputs even when monitoring lower VCC rails. |
| MR internal 63kΩ pullup | Supports momentary switch-to-GND implementation without external biasing components. |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers operating in harsh factory environments with fluctuating 24VDC-derived 3.3V rails. IC Role / Device Role / Timing Role: Monitors 3.3V domain and asserts RESET during brownouts caused by load switching or EMI. Use Value: Prevents corrupted firmware execution and I/O misstates using guaranteed -40°C to +125°C operation and 3.08V threshold aligned to 3.3V system margin. | Use Scenario: Remote environmental sensors powered by AA batteries with infrequent wake-up cycles. IC Role / Device Role / Timing Role: Provides ultra-low-power supply supervision during sleep mode and ensures clean reset on wake-up. Use Value: 5μA ICC extends battery life beyond 5 years; 140ms timeout accommodates slow LDO stabilization after cold start. |
| Medical Point-of-Care Devices | Automotive Body Control Modules |
Use Scenario: Handheld diagnostic tools requiring FDA-grade reliability and rapid power-cycle recovery. IC Role / Device Role / Timing Role: Generates deterministic reset pulse upon battery insertion or USB power connect. Use Value: Factory-trimmed 3.08V threshold avoids calibration drift; open-drain RESET interfaces cleanly with mixed-voltage SoC reset domains. | Use Scenario: Under-dash modules exposed to wide ambient temperature swings and load-dump transients. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply derived from automotive 12V rail. Use Value: Immunity to <100ns noise spikes and ±3.5% threshold tolerance ensure no false resets during cranking or alternator ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US31D3-T | Bidirectional reset pin support; identical 3.08V threshold and 140ms timeout. | Required for μCs with shared reset/input pins; not needed for standard active-low reset inputs. | Select MAX6314US31D3-T only if target microcontroller uses bidirectional reset I/O. |
| TPS3808G33DBVR | 3.3V threshold (±0.5%), 200ms timeout, 1.5μA ICC, SOT23-5 package. | Higher accuracy threshold but longer timeout and extra pin; requires PCB redesign. | Choose TPS3808G33DBVR only when tighter threshold tolerance (±0.5% vs ±3.5%) is critical and layout allows 5-pin SOT23. |
Compared with MAX6314US31D3-T, the MAX6315US31D3-T offers simpler integration for unidirectional reset systems; versus TPS3808G33DBVR, it trades threshold accuracy for lower cost, smaller footprint, and proven transient immunity in noisy industrial settings.
Availability
MAX6315US31D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical point-of-care devices, 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX6315 series was designed specifically for low-power, high-reliability microprocessor supervision in space-constrained and thermally demanding applications - emphasizing factory-trimmed accuracy, minimal external components, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the MAX6315US31D3-T?
The MAX6315US31D3-T has a factory-trimmed nominal reset threshold of 3.08V, with tolerance of ±3.5% over the full -40°C to +125°C operating range and a temperature coefficient of 60ppm/°C. This value is laser-trimmed during manufacturing and does not require external calibration.
Does the MAX6315US31D3-T require external components for basic operation?
No, the MAX6315US31D3-T requires only an external pullup resistor on the RESET pin for normal operation. It includes an internal 63kΩ pullup on MR and needs no external resistors for threshold setting or timing - making it a true single-component solution for μP reset supervision.
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 6V, allowing it to be pulled up to a voltage higher than VCC (e.g., 5V while monitoring a 3.3V rail). This enables level-shifting between different supply domains without additional interface circuitry.
What is the minimum reset timeout period specified for the MAX6315US31D3-T?
The MAX6315US31D3-T is configured with a minimum reset timeout period of 140ms, guaranteed over -40°C to +125°C. Typical values range from 200ms to 280ms depending on temperature, ensuring sufficient hold time for power supply stabilization and μP initialization.
Is the MAX6315US31D3-T suitable for automotive applications?
Yes, the MAX6315US31D3-T is qualified for operation from -40°C to +125°C and features immunity to short VCC transients (<100ns), making it suitable for automotive body control modules and other under-hood applications where thermal stress and electrical noise are present.
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:
- Obsolete
- 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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