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Analog Devices Inc./Maxim Integrated MAX6315US31D2-T
- Part No.:
- MAX6315US31D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US31D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,943
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Product details
Overview
MAX6315US31D2-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 ≥20ms 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 power-on reset.
For engineers reviewing the MAX6315US31D2-T datasheet, MAX6315US31D2-T pinout, MAX6315US31D2-T application, or MAX6315US31D2-T equivalent, key selection criteria include factory-trimmed 3.08V reset threshold, 20ms minimum timeout, open-drain output capable of level-shifting above VCC, guaranteed operation over temperature, and immunity to short VCC transients.
Technical Context
The MAX6315US31D2-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider setting nominal VTH = 3.08V ±3.5% over -40°C to +125°C, and integrates a monolithic timer circuit that enforces a fixed 20ms (min) reset timeout period after VCC rises above threshold or MR deasserts. Its open-drain RESET output uses an n-channel MOSFET switch rated for sink current up to 3.2mA at VCC > 4.25V and supports pullup voltages up to +6.0V - enabling level-shifted reset signaling across supply domains.
MR input includes an internal 63kΩ pullup resistor, accepts logic-low manual reset pulses as short as 1μs, rejects glitches <100ns, and introduces ≤500ns delay from MR deassertion to RESET deassertion. The device requires no external components beyond a single pullup resistor on RESET and is immune to VCC transients ≤100μs when overdrive exceeds 20mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 3.3V systems with margin |
| Reset Timeout Period | 20ms (min) - meets μP power-up timing requirements without external RC timing components |
| Supply Current | 5μA at VCC = 5.5V, TA = -40°C to +85°C - enables multi-year battery life in portable equipment |
| RESET Output Type | Open-drain n-MOSFET - allows pullup to any voltage ≤6.0V, enabling level-shifted reset to different supply domains |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup; MR floats high when unused |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
| VCC Range | 1.0V to 5.5V - supports operation down to near-dead-battery conditions while maintaining RESET assertion |
Pinout & Package
MAX6315US31D2-T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1), with 1.3mm × 0.8mm footprint and 0.95mm height. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC - top-marked "HQAA".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal comparator and timer; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to define logic-high voltage level |
| MR (Pin 3) | Manual reset input | Logic-low pulse ≥1μs asserts reset; internal 63kΩ pullup holds high when unconnected |
| VCC (Pin 4) | Supply and monitor input | Power source and monitored voltage rail; internal divider samples this node to detect brownout |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 3.08V with ±3.5% tolerance over full temperature range - eliminates calibration and reduces BOM count |
| Fixed 20ms reset timeout | Guaranteed minimum duration ensures μP reset hold time compliance without external timing components |
| Open-drain RESET with 6V max pullup | Enables reset signaling from 3.3V domain to 5V or mixed-voltage logic, supporting flexible system architecture |
| Internal MR pullup resistor | 63kΩ value allows direct switch-to-ground connection without external biasing - simplifies PCB layout |
| Low 5μA quiescent current | Minimizes standby power draw in always-on monitoring applications such as smart sensors and IoT edge nodes |
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 VCC and asserts RESET during brownouts or cold starts to prevent corrupted firmware execution. Use Value: Guaranteed -40°C to +125°C operation and 3.08V threshold match typical 3.3V LDO dropout margins, ensuring deterministic reset behavior. | Use Scenario: Remote environmental sensors powered by coin-cell batteries, requiring years of maintenance-free operation. IC Role / Device Role / Timing Role: Provides ultra-low-current (5μA) power-on and brownout reset supervision while preserving battery life. Use Value: 1.0V minimum VCC operation allows continued RESET assertion even as battery voltage decays below 2.0V. |
| Automotive Body Control Modules | Medical Handheld Diagnostics |
Use Scenario: Under-dash electronics exposed to wide ambient temperature swings and load-dump transients. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply and provides glitch-immune reset during ignition cycling. Use Value: Immunity to transients <100ns and 20ms timeout meet ISO 16750-2 pulse test requirements for robustness. | Use Scenario: Portable diagnostic tools with USB-rechargeable Li-ion batteries and dual-supply (3.3V/5V) logic. IC Role / Device Role / Timing Role: Generates level-shifted RESET signal from 3.3V domain to 5V display controller using open-drain output. Use Value: RESET pullup to 5V enables direct interface with 5V-tolerant peripherals without level translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US30D2-T | 3.00V reset threshold (vs. 3.08V); otherwise identical timing, package, and electrical specs | Better suited for systems with tighter 3.3V LDO tolerance where 3.00V trip point avoids nuisance resets | Select when design requires lower threshold margin for 3.3V rails with minimal dropout headroom |
| TLV803EB30DBZR | 3.00V threshold, 20ms timeout, SOT23-3 package, push-pull (not open-drain) output, 1.8–6V VCC range | Lacks level-shifting capability due to push-pull output; requires same-supply pullup; lower ICC (0.5μA) | Choose when open-drain functionality is unnecessary and ultra-low ICC is prioritized over voltage-domain flexibility |
Compared with MAX6315US31D2-T, MAX6315US30D2-T offers a 80mV lower reset threshold for tighter 3.3V rail monitoring, while TLV803EB30DBZR trades open-drain level-shifting for lower quiescent current and push-pull simplicity - making each suitable for distinct system-level voltage architecture decisions.
Availability
MAX6315US31D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, automotive body control modules, and medical handheld diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US31D2-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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The MAX6315 family is part of Analog Devices' supervisory IC product line, designed specifically for reliable, low-power power-on and brownout reset generation in microprocessor-based systems across industrial, automotive, and portable applications.
FAQ
What is the exact reset threshold voltage of the MAX6315US31D2-T?
The MAX6315US31D2-T has a factory-trimmed nominal reset threshold 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)" - ensuring consistent brownout detection for 3.3V systems without external calibration.
Does the MAX6315US31D2-T require external components to function?
No, the MAX6315US31D2-T requires only a single external pullup resistor on the RESET pin (e.g., 10kΩ) to define the logic-high voltage level. It includes an internal 63kΩ pullup on MR and needs no external timing components, capacitors, or voltage dividers - reducing BOM count and PCB area versus discrete reset solutions.
Can the RESET output of the MAX6315US31D2-T be pulled up to a voltage higher than VCC?
Yes, the MAX6315US31D2-T features an open-drain RESET output rated for pullup voltages up to +6.0V, regardless of VCC level (which operates from 1.0V to 5.5V). This enables level-shifting - for example, pulling RESET to 5V while monitoring a 3.3V VCC rail - a capability confirmed in the Absolute Maximum Ratings and Detailed Description sections.
What is the minimum reset timeout period for the MAX6315US31D2-T?
The MAX6315US31D2-T has a minimum reset timeout period of 20ms, as defined in the Ordering Information and Electrical Characteristics tables. This guaranteed minimum ensures sufficient hold time for microprocessors during power-up and brownout recovery, eliminating the need for external RC timing networks.
Is the MAX6315US31D2-T compatible with the MAX811?
Yes, the MAX6315US31D2-T is pin-compatible with the MAX811 series per the Benefits and Features section, sharing identical 4-pin SOT23 pinout (GND, RESET, MR, VCC) and functional behavior. However, it offers improved specifications including wider temperature range (-40°C to +125°C vs. -40°C to +85°C for most MAX811 variants) and tighter reset threshold accuracy.
MAX6315US31D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US31D2-T FAQ
1.How can I place an order for MAX6315US31D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US31D2-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 MAX6315US31D2-T reliable?
The price and inventory of MAX6315US31D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US31D2-T is usually 5 days.
3.What payment methods are accepted for MAX6315US31D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US31D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US31D2-T?
MAX6315US31D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US31D2-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 MAX6315US31D2-T?
For technical support, including MAX6315US31D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US31D2-T requirements.
6.How does Aetrix verify that MAX6315US31D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US31D2-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 MAX6315US31D2-T meets industry standards.
7.What is the process for return or replacement of MAX6315US31D2-T?
All MAX6315US31D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US31D2-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 MAX6315US31D2-T part is unused and in its original packaging.
Return procedure for MAX6315US31D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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