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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:2,799
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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, consumes only 5μA at 5.5V, and operates across -40°C to +125°C - used in battery-powered controllers and embedded systems requiring reliable power-on reset.
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, SOT23-4 package compatibility, open-drain output capable of level-shifting above VCC, and guaranteed operation over extended temperature.
Technical Context
The MAX6315US31D1+T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider setting nominal VTH = 3.08V ±3.5% over -40°C to +125°C, and integrates a monostable timer generating ≥1ms reset pulse after VCC recovery or MR release. Its internal 63kΩ MR pullup eliminates external components for manual reset.
Reset assertion is immune to transients ≤100ns on MR and rejects VCC glitches up to 35μs duration when overdrive is <10mV; the open-drain RESET output sinks ≥1.2mA at VCC >2.5V while supporting pullup voltages up to +6.0V - enabling cross-rail reset signaling between 1.0V–5.5V monitored supplies and higher-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±3.5% over -40°C to +125°C - ensures deterministic brownout detection for 3.3V systems with margin |
| Reset Timeout Period | ≥1ms (min) - meets μP power-up timing requirements without external RC timing components |
| Supply Current | 5μA typical at 5.5V - enables multi-year operation in coin-cell–powered IoT endpoints |
| Operating Voltage Range | 1.0V to 5.5V - supports monitoring of 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails |
| RESET Output Type | Open-drain, rated to 6.0V - allows level-shifted reset assertion to higher-voltage domains (e.g., 5V μP from 3.3V supply) |
| MR Input | Internal 63kΩ pullup - eliminates external resistor; accepts logic-low pulse ≥1μs for manual reset initiation |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6315US31D1+T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and timer; must connect to system ground plane for stable threshold accuracy |
| 2 (RESET) | Active-low open-drain output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to target logic rail (≤6V); asserts during VCC brownout or MR low |
| 3 (MR) | Manual reset input | Logic-low (≤0.3×VCC) asserts reset; internal 63kΩ pullup holds high when floating; debounced internally - no external RC needed |
| 4 (VCC) | Supply and monitor input | Powers device and feeds internal voltage divider; monitors own supply - supports 1.0V–5.5V operation and reset generation down to 1V |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 3.08V with ±3.5% tolerance over full temperature range - eliminates calibration and improves system reliability vs. discrete resistor-divider solutions |
| Guaranteed minimum reset timeout | 1ms (min) after VCC rise or MR release - ensures μP reset hold time compliance without timing capacitor drift or temperature dependence |
| Open-drain RESET with 6V rating | Enables reset signaling across voltage domains (e.g., 3.3V supply monitoring while driving 5V μP reset pin) - reduces need for level translators |
| Ultra-low quiescent current | 5μA typical at 5.5V - extends battery life in always-on sensor nodes and wearable devices |
| Integrated MR pullup | 63kΩ internal resistor - removes external component count and PCB area; simplifies pushbutton reset interface design |
Applications
| Industrial PLC Controller | Battery-Powered Data Logger |
|---|---|
Use Scenario: Programmable logic controller operating in factory environments with fluctuating 24VDC-derived 3.3V rails subject to load-switching transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 μP during undervoltage events on the 3.3V domain. Use Value: Prevents code corruption during brownout by guaranteeing ≥1ms reset pulse with 3.08V threshold aligned to 3.3V rail tolerance, and rejects <100ns noise on MR line. |
Use Scenario: Remote environmental sensor node powered by CR2032 coin cell, sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Power-on reset generator and brownout detector for MSP430FR59xx MCU, ensuring clean boot after cold start or battery sag. Use Value: 5μA supply current extends operational lifetime beyond 5 years; open-drain RESET allows direct connection to MCU's 3.3V-tolerant reset pin without level shifter. |
| Automotive Body Control Module | Medical Point-of-Care Monitor |
Use Scenario: Under-dash BCM exposed to -40°C to +125°C ambient, powered from vehicle battery via 3.3V LDO. IC Role / Device Role / Timing Role: Monitors 3.3V supply integrity and provides manual reset via service port; asserts RESET during cranking-induced dips. Use Value: Guaranteed operation across full AEC-Q100 Grade 0 temperature range; 3.08V threshold provides 220mV margin below nominal 3.3V rail, preventing nuisance resets. |
Use Scenario: Portable ECG monitor with dual-supply architecture: 1.8V analog front-end and 3.3V digital subsystem. IC Role / Device Role / Timing Role: Resets digital subsystem independently when its 3.3V rail drops, while allowing analog section to remain active for continuous signal acquisition. Use Value: Open-drain RESET pulled to 3.3V domain ensures proper logic levels; 1ms timeout satisfies ARM Cortex-M4 reset timing specs without external timing components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D2+T | Same 3.08V threshold but 20ms min timeout (vs. 1ms) | Suitable where longer reset hold time is required for slower peripherals or complex boot sequences | Select when system boot firmware requires >10ms reset assertion - not drop-in compatible due to timeout mismatch |
| TPS3808G33DBVR | 3.3V threshold (±0.5%), 200ms default timeout, 1.5μA ICC, SOT23-5 | Higher accuracy threshold but fixed 200ms timeout and 5-pin package - requires PCB redesign | Choose for tighter threshold tolerance in precision instrumentation; verify layout change impact before substitution |
Compared with MAX6315US31D2+T and TPS3808G33DBVR, the MAX6315US31D1+T delivers the shortest standardized timeout (1ms) at 3.08V while maintaining ultra-low ICC and SOT23-4 footprint - ideal for fast-boot, space-constrained, and battery-sensitive designs where minimal reset duration is critical.
Availability
MAX6315US31D1+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, automotive body control modules, and medical point-of-care monitors 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 since 1965.
The MAX6315US31D1+T belongs to Analog Devices' precision supervisory IC product line, engineered for deterministic power-monitoring in safety-critical and energy-constrained embedded systems - emphasizing low ICC, wide temperature operation, and factory-trimmed accuracy.
FAQ
What is the exact reset threshold voltage of the MAX6315US31D1+T?
The MAX6315US31D1+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)" - it is not adjustable and applies directly to the MAX6315US31D1+T without external components.
Does the MAX6315US31D1+T require an external pullup resistor on the RESET pin?
Yes, the MAX6315US31D1+T features an open-drain RESET output and requires an external pullup resistor to establish a valid logic-high level. A 10kΩ resistor pulled to the target logic rail (≤6.0V) is sufficient in most applications. The device itself does not provide internal pullup on RESET - this external component is mandatory for proper reset signaling to the microprocessor.
Can the MAX6315US31D1+T monitor a 1.8V supply rail?
Yes, the MAX6315US31D1+T operates from VCC = 1.0V to 5.5V and can monitor any supply within that range, including 1.8V. However, its fixed 3.08V reset threshold means it will not assert reset for undervoltage on a 1.8V rail - it is intended for monitoring rails ≥3.08V (e.g., 3.3V). For 1.8V monitoring, a different variant such as MAX6315US18D1+T would be required.
What is the minimum reset timeout period guaranteed for the MAX6315US31D1+T?
The MAX6315US31D1+T guarantees a minimum reset timeout period of 1ms after VCC rises above the 3.08V threshold or after the manual reset (MR) input is deasserted. This value is tested and specified across -40°C to +125°C and appears in the Electrical Characteristics table under "Reset Timeout Period (tRP)" for the D1 suffix - it is not affected by external components.
Is the MR pin of the MAX6315US31D1+T internally pulled up, and what is its resistance value?
Yes, the MR pin of the MAX6315US31D1+T includes an internal pullup resistor with a nominal value of 63kΩ (range 32kΩ to 100kΩ), as specified in the Electrical Characteristics table. This eliminates the need for an external pullup resistor when implementing manual reset with a momentary switch to GND - the internal resistor ensures MR remains logic-high when unconnected.
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:
- 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:
- 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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