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Analog Devices Inc./Maxim Integrated MAX6315US31D3-G125
- Part No.:
- MAX6315US31D3-G125
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US31D3-G125.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
MAX6315US31D3-G125 from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit in SOT143 package, designed to monitor VCC supply voltage and assert an open-drain active-low RESET signal when voltage falls below 3.08V or upon manual reset assertion. It provides a factory-programmed 140ms minimum reset timeout period, 5µA supply current at +25°C, and operates across -40°C to +125°C. Used for reliable power-on reset in battery-powered microcontroller systems.
For engineers reviewing the MAX6315US31D3-G125 datasheet, MAX6315US31D3-G125 pinout, MAX6315US31D3-G125 application, or MAX6315US31D3-G125 equivalent, this page delivers verified specifications, SOT143 terminal roles, temperature-stable reset threshold behavior, and direct alternatives for industrial-grade µP reset design.
Technical Context
The MAX6315US31D3-G125 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 a monostable timer generating ≥140ms reset pulse after VCC recovery or MR release. Its open-drain RESET output supports level-shifting up to +6V independent of VCC.
MR input includes a 63kΩ internal pull-up and rejects transients <1µs wide; VCC glitch immunity is characterized down to 1mV/µs slew rate. The device draws only 5µA typical ICC over full temperature range and maintains guaranteed operation with VCC as low as 1.0V during reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 3.08V - Factory-trimmed reset threshold enabling precise brownout detection for 3.3V systems. |
| Reset Timeout (tRP) | ≥140ms - Internally timed minimum duration ensures µP initialization completes before release. |
| Supply Current (ICC) | 5µA (TA = +25°C) - Ultra-low quiescent current extends battery life in portable equipment. |
| Operating Temp Range | -40°C to +125°C - Qualified for automotive under-hood and industrial embedded environments. |
| RESET Output Type | Open-drain N-channel MOSFET - Allows pull-up to voltage higher than VCC (up to +6V), enabling multi-rail reset coordination. |
| MR Input Behavior | Active-low with 63kΩ internal pull-up - Eliminates external components; supports momentary switch-to-GND manual reset. |
| VCC Range | 1.0V to 5.5V - Ensures valid reset assertion even during deep brownout or partial power-down. |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.1mm footprint and 0.95mm height; lead-free compatible; tape-and-reel packaging only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal circuitry and RESET sink current; must connect to system ground plane. |
| 2 - RESET | Active-low open-drain output | Sinks current when asserted; requires external pull-up resistor (e.g., 10kΩ) to target logic rail (≤+6V). |
| 3 - MR | Manual reset input | Logic-low assertion forces RESET active; internally pulled up to VCC; debounced by design. |
| 4 - VCC | Supply and monitoring input | Powers device and feeds internal voltage divider; monitored for reset threshold violation. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed VTH | 3.08V ±3.5% over full temperature range eliminates calibration and reduces BOM count. |
| Four fixed tRP options | 140ms minimum timeout prevents premature µP release during slow-rising VCC in noisy environments. |
| Open-drain RESET with >VCC capability | Enables single reset signal to coordinate multiple voltage domains (e.g., 3.3V µP + 5V peripheral rail). |
| Immunity to short VCC transients | Rejects glitches <1µs wide, reducing false resets in electrically noisy industrial control cabinets. |
| Guaranteed operation down to VCC = 1.0V | Maintains valid RESET assertion during deep brownout, ensuring µP remains held until stable power returns. |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Programmable logic controllers operating in factory-floor environments with fluctuating 24VDC supplies converted to 3.3V logic rails. IC Role / Device Role / Timing Role: Monitors 3.3V VCC rail and asserts RESET if voltage sags below 3.08V due to load switching or EMI coupling. Use Value: Prevents corrupted ladder logic execution during transient brownouts, avoiding unsafe machine states. |
Use Scenario: Remote environmental sensors powered by Li-SOCl₂ batteries delivering 3.6V nominal, degrading to 2.8V over years of operation. IC Role / Device Role / Timing Role: Detects end-of-life voltage drop below 3.08V and holds µP in reset until replacement, preserving flash memory integrity. Use Value: Eliminates uncontrolled shutdowns that could corrupt timestamped sensor data or erase calibration tables. |
| Automotive Body Control Modules | Medical Portable Diagnostics |
|
Use Scenario: Under-hood BCMs exposed to -40°C cold cranking and +125°C engine heat, powered from 12V battery via LDO. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output using -40°C to +125°C qualified 3.08V threshold and 140ms timeout. Use Value: Guarantees deterministic reset timing across extreme ambient conditions, meeting ISO 16750-4 requirements. |
Use Scenario: Handheld blood glucose meters using coin-cell batteries with steep discharge curves near end-of-life. IC Role / Device Role / Timing Role: Provides clean power-on reset and brownout hold with ultra-low 5µA ICC to maximize battery service life. Use Value: Extends usable battery life by >20% versus higher-current supervisors, critical for FDA-cleared field devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D2-T | Same 3.08V VTH, but 20ms min tRP instead of 140ms; identical SOT143 package and temperature range. | Suitable where faster reset release is acceptable (e.g., non-critical consumer IoT nodes). | Select when system startup timing allows shorter reset hold time and lower cost is prioritized. |
| TLV803EB30DBZR | 3.0V nominal VTH (±1.5%), 200ms tRP, 1.8–6V VCC range, SOT-23-3 package; no MR input. | Lacks manual reset functionality; smaller footprint but no MR flexibility for field service. | Choose when MR is unused and board space is constrained, accepting tighter VTH tolerance and no MR. |
Compared with MAX6315US31D3-G125, the MAX6315US31D2-T offers faster reset release but less margin for slow-rising supplies, while TLV803EB30DBZR trades MR capability and wider VCC range for compact size and tighter threshold accuracy-making each suitable for distinct reliability vs. space trade-offs.
Availability
MAX6315US31D3-G125 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-G125 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6315 family delivers highly accurate, low-power supervisory circuits optimized for reliable µP reset in harsh environments where voltage stability and temperature resilience are critical.
FAQ
What is the exact reset threshold voltage for MAX6315US31D3-G125?
The MAX6315US31D3-G125 has a factory-trimmed nominal reset threshold of 3.08V, with a tolerance of ±3.5% over the full -40°C to +125°C operating temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for the D3 variant. It is not adjustable and applies directly to the VCC pin.
Does MAX6315US31D3-G125 support manual reset functionality?
Yes, MAX6315US31D3-G125 includes a dedicated MR (manual reset) input on pin 3. A logic-low applied to MR asserts RESET regardless of VCC level, and RESET remains active for the full 140ms timeout after MR is released. An internal 63kΩ pull-up resistor allows MR to be left floating if unused, or connected to a momentary switch to ground for field-service reset capability.
Can the RESET output of MAX6315US31D3-G125 be pulled up to a voltage higher than VCC?
Yes, the RESET output of MAX6315US31D3-G125 is an open-drain N-channel MOSFET rated for voltages up to +6.0V. This allows the output to be pulled up to a higher-voltage rail (e.g., 5V) while monitoring a lower VCC (e.g., 3.3V), enabling level-shifted reset signaling across multiple power domains without additional logic.
What is the minimum VCC voltage at which MAX6315US31D3-G125 guarantees RESET assertion?
MAX6315US31D3-G125 guarantees RESET remains asserted for VCC down to 1.0V, as confirmed in the Electrical Characteristics table under "VCC Supply Current" and "RESET Output Voltage" conditions. Below 1.0V, the device may lose ability to sink sufficient current, but the 1.0V guarantee ensures robust hold during deep brownout events common in battery-backed systems.
Is MAX6315US31D3-G125 pin-compatible with other members of the MAX6315 family?
Yes, all MAX6315 variants-including MAX6315US31D3-G125-use the same SOT143 package and identical pinout (GND, RESET, MR, VCC). Differences are limited to reset threshold voltage and timeout period, both factory-set. No PCB layout change is required when substituting between D1/D2/D3/D4 versions, provided thermal and timing requirements remain satisfied.
MAX6315US31D3-G125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- 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-23-4
MAX6315US31D3-G125 FAQ
1.How can I place an order for MAX6315US31D3-G125 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US31D3-G125 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-G125 reliable?
The price and inventory of MAX6315US31D3-G125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US31D3-G125 is usually 5 days.
3.What payment methods are accepted for MAX6315US31D3-G125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US31D3-G125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US31D3-G125?
MAX6315US31D3-G125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US31D3-G125 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-G125?
For technical support, including MAX6315US31D3-G125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US31D3-G125 requirements.
6.How does Aetrix verify that MAX6315US31D3-G125 is sourced from the original manufacturer or authorized distributors?
All MAX6315US31D3-G125 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-G125 meets industry standards.
7.What is the process for return or replacement of MAX6315US31D3-G125?
All MAX6315US31D3-G125 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US31D3-G125, 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-G125 part is unused and in its original packaging.
Return procedure for MAX6315US31D3-G125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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