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Analog Devices Inc./Maxim Integrated MAX6315US31D1-T
- Part No.:
- MAX6315US31D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US31D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,063
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Product details
Overview
MAX6315US31D1-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 ≥1ms after recovery, operates from -40°C to +125°C, draws only 5μA typical supply current, and uses a 4-pin SOT23 package for space-constrained embedded power monitoring.
For engineers reviewing the MAX6315US31D1-T datasheet, MAX6315US31D1-T pinout, MAX6315US31D1-T application, or MAX6315US31D1-T equivalent, key selection criteria include factory-trimmed 3.08V reset threshold, 1ms minimum timeout, open-drain output compatible with supplies up to 6V, guaranteed operation over industrial temperature range, and immunity to short VCC transients.
Technical Context
The MAX6315US31D1-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 1ms (min) reset timeout period after VCC recovery or MR deassertion. Its MR input includes a 63kΩ internal pullup and rejects glitches <100ns.
RESET output is a true open-drain n-channel MOSFET capable of sinking ≥3.2mA at VCC > 4.25V while maintaining VOL ≤ 0.4V, and supports level-shifting - e.g., monitoring a 3.3V rail while pulling RESET up to 5V - with no external components required beyond the pullup resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 3.08V - Factory-laser-trimmed threshold ensures accurate brownout detection without external calibration. |
| tRP Min | 1ms - Guarantees sufficient reset hold time for reliable μP initialization during power-up or recovery. |
| ICC Typ | 5μA at VCC = 5.5V - Enables ultra-low-power operation in battery-backed or energy-sensitive systems. |
| Operating Temp | -40°C to +125°C - Qualified for under-hood automotive, industrial control, and harsh-environment applications. |
| RESET Output | Open-drain, 6V max pullup - Allows interface across voltage domains (e.g., 3.3V VCC monitored, 5V RESET pullup). |
| VIL/VIH (MR) | 0.3×VCC / 0.7×VCC - Compatible with standard CMOS logic levels across full VCC range (1.0V–5.5V). |
| MR Glitch Reject | 100ns - Prevents spurious resets from EMI or PCB noise on manual reset line. |
Pinout & Package
MAX6315US31D1-T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary return path for internal circuitry and RESET sink current; must be low-impedance connection. |
| RESET (Pin 2) | Active-low open-drain output | Drives low to assert reset; requires external pullup (e.g., 10kΩ) to any supply ≤6V; enables level-shifted reset signaling. |
| MR (Pin 3) | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ; debounced by design; tolerant of noisy switch inputs. |
| VCC (Pin 4) | Supply & monitor input | Powers device and provides monitored voltage source; valid from 1.0V to 5.5V; threshold sensing derived internally. |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed VTH | 3.08V ±3.5% over full temperature range eliminates need for external resistor networks or calibration. |
| Guaranteed 1ms reset timeout | Ensures μP reset pulse meets minimum assertion time requirements even under worst-case voltage ramp conditions. |
| Open-drain RESET with 6V tolerance | Permits flexible system-level reset architecture - e.g., monitoring 3.3V core while driving 5V reset tree. |
| 5μA supply current | Reduces standby power in always-on subsystems such as real-time clocks, sensor hubs, or battery backup circuits. |
| MR input with integrated 63kΩ pullup | Enables direct connection of momentary switch to GND without external components - simplifies BOM and layout. |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring 3.3V microcontroller supply in programmable logic controllers exposed to wide ambient temperatures and electrical noise. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to prevent erratic firmware execution during brownout or cold-cranking events. Use Value: Guaranteed -40°C to +125°C operation and 100ns MR glitch rejection ensure deterministic reset behavior in electrically hostile factory-floor environments. | Use Scenario: Supervising power to an ARM-based BCM MCU powered from a switched 3.3V rail derived from vehicle battery. IC Role / Device Role / Timing Role: Brownout detector with 3.08V threshold aligned to MCU's minimum operating voltage, holding RESET for ≥1ms during cranking dips. Use Value: Open-drain RESET allows pullup to 5V CAN transceiver supply, enabling synchronized reset across multiple voltage domains without level shifters. |
| Portable Medical Sensors | Smart Energy Meters |
Use Scenario: Power supervision in battery-powered glucose monitors or pulse oximeters where standby current directly impacts battery life. IC Role / Device Role / Timing Role: Ultra-low-power (5μA) supervisor ensuring safe boot sequence while minimizing quiescent drain on coin-cell or Li-ion sources. Use Value: 1ms timeout and precise 3.08V threshold prevent false resets during brief load-switching transients while guaranteeing valid reset pulse width. | Use Scenario: Monitoring 3.3V supply to metrology SoC and communication ICs in ANSI C12.22-compliant electricity meters deployed outdoors. IC Role / Device Role / Timing Role: High-reliability reset generator with extended temperature qualification and immunity to conducted EMI on power rails. Use Value: Laser-trimmed threshold stability (60ppm/°C) and 140ms transient immunity maintain reset integrity across seasonal temperature swings and grid disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811SEUS31+T | Same 3.08V threshold and 1ms timeout, but rated only to +85°C; 5μA ICC; pin-compatible SOT23-4. | Limited to commercial/industrial ambient (not extended temp); suitable for cost-sensitive non-automotive designs. | Select when full -40°C to +125°C operation is not required and lower cost is prioritized. |
| TPS3808G30DBVR | 3.0V threshold (±0.5%), 1.25ms min timeout, 2.5μA ICC, SOT23-5; includes watchdog timer not present in MAX6315US31D1-T. | Requires 5th pin for WDI; higher accuracy but adds complexity if watchdog functionality is unused. | Select only if watchdog capability is needed; otherwise, MAX6315US31D1-T offers simpler, proven reset-only function with extended temp rating. |
Compared with MAX811SEUS31+T, the MAX6315US31D1-T delivers guaranteed operation to +125°C - critical for automotive and industrial deployments - while matching threshold and timeout. Against TPS3808G30DBVR, it trades watchdog flexibility for smaller footprint, lower pin count, and superior thermal robustness in dedicated reset applications.
Availability
MAX6315US31D1-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US31D1-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 MAX6315US31D1-T belongs to the MAX63xx family of precision voltage supervisors, engineered specifically for reliable, low-power reset generation in microprocessor-based systems operating under demanding thermal and electrical conditions.
FAQ
What is the exact reset threshold voltage of the MAX6315US31D1-T?
The MAX6315US31D1-T features a factory-laser-trimmed nominal reset threshold of 3.08V, with tolerance of ±3.5% over the full -40°C to +125°C operating range. This value is confirmed in the Ordering Information table and Electrical Characteristics section of the official Analog Devices datasheet, and applies specifically to the "US31" variant designation in the part number.
Does the MAX6315US31D1-T require external components to operate?
No, the MAX6315US31D1-T requires only an external pullup resistor on the RESET pin - typically 10kΩ - to function. It integrates all necessary elements: precision voltage reference, comparator, timer, internal MR pullup (63kΩ), and open-drain output driver. No capacitors, resistors, or trimming components are needed for basic reset supervision.
Can the RESET output of the MAX6315US31D1-T be pulled up to a voltage higher than its VCC supply?
Yes, the MAX6315US31D1-T's RESET pin is a true open-drain output rated for up to 6.0V, allowing it to be pulled up to a voltage higher than VCC (e.g., 5V pullup while monitoring a 3.3V VCC rail). This enables level-shifting between power domains without additional circuitry - a key feature confirmed in the Pin Description and Absolute Maximum Ratings sections.
What is the minimum reset timeout period specified for the MAX6315US31D1-T?
According to the datasheet's Electrical Characteristics table, the MAX6315US31D1-T has a minimum reset timeout period (tRP) of 1ms across its full operating temperature range (-40°C to +125°C). This value is explicitly tied to the "D1" suffix in the part number and verified under both +85°C and +125°C conditions.
Is the MAX6315US31D1-T pin-compatible with other devices in the MAX63xx family?
Yes, the MAX6315US31D1-T shares identical 4-pin SOT23 pinout (VCC, MR, RESET, GND) and footprint with all MAX6315 variants and the pin-compatible MAX811 series. This allows drop-in substitution within the same threshold/time variant group, provided temperature and timing requirements align - a compatibility explicitly stated in the Benefits and Features section.
MAX6315US31D1-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US31D1-T FAQ
1.How can I place an order for MAX6315US31D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US31D1-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 MAX6315US31D1-T reliable?
The price and inventory of MAX6315US31D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US31D1-T is usually 5 days.
3.What payment methods are accepted for MAX6315US31D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US31D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US31D1-T?
MAX6315US31D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US31D1-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 MAX6315US31D1-T?
For technical support, including MAX6315US31D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US31D1-T requirements.
6.How does Aetrix verify that MAX6315US31D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US31D1-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 MAX6315US31D1-T meets industry standards.
7.What is the process for return or replacement of MAX6315US31D1-T?
All MAX6315US31D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US31D1-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 MAX6315US31D1-T part is unused and in its original packaging.
Return procedure for MAX6315US31D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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