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Analog Devices Inc./Maxim Integrated MAX6315US30D2-T
- Part No.:
- MAX6315US30D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US30D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,075
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Product details
Overview
MAX6315US30D2-T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain reset signal when voltage falls below 3.00V or upon manual reset assertion. It features a factory-trimmed 3.00V reset threshold, 20ms minimum reset timeout period, 5μA supply current at +25°C, and operates across –40°C to +125°C. It is used in portable battery-powered equipment to ensure reliable μP initialization during brownout conditions.
For engineers reviewing the MAX6315US30D2-T datasheet, MAX6315US30D2-T pinout, MAX6315US30D2-T application, or MAX6315US30D2-T equivalent, this page provides verified electrical parameters, SOT23 package details, reset timing behavior under temperature variation, MR input logic thresholds, and design-meaningful alternatives for power-supply monitoring in embedded systems.
Technical Context
The MAX6315US30D2-T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider setting a nominal 3.00V reset threshold (±3.5% over –40°C to +125°C) and 60ppm/°C tempco. Its internal timer generates a guaranteed-minimum 20ms reset pulse after VCC recovery or MR deassertion.
It uses an open-drain n-channel MOSFET RESET output capable of sinking 3.2mA at VCC > 4.25V while allowing pullup to voltages up to +6.0V - enabling level-shifted reset signaling across mixed-supply systems. The MR input includes a 63kΩ internal pullup and rejects transients <100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V nominal, ±3.5% over –40°C to +125°C - ensures consistent brownout detection across industrial temperature range |
| Reset Timeout Period | 20ms minimum (D2 variant) - guarantees sufficient μP reset hold time for reliable boot sequence completion |
| Supply Current | 5μA typical at +25°C, ≤15μA at +125°C - enables multi-year operation in battery-backed systems |
| RESET Output Type | Open-drain, rated to sink 3.2mA at VCC > 4.25V - supports flexible pullup to higher-voltage rails (up to +6V) |
| MR Input Threshold | VIL = 0.3 × VCC, VIH = 0.7 × VCC (for VTH < 4.0V) - compatible with standard CMOS logic driving manual reset |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
The MAX6315US30D2-T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052, land pattern 90-0183), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and thermal pad omitted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and timer; must be low-impedance to avoid noise-induced false resets |
| 2 (RESET) | Active-low open-drain reset output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to system reset rail - enables level shifting across supplies |
| 3 (MR) | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ resistor - allows direct switch-to-ground connection without external components |
| 4 (VCC) | Supply voltage and monitor input | Power source and monitored rail; internal divider tracks VCC to detect undervoltage - functions down to 1.0V supply |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 3.00V ±3.5% over full temperature range - eliminates calibration effort and external resistor networks |
| Guaranteed minimum reset timeout | 20ms (D2 variant) - ensures μP reset meets JEDEC JESD22-B111 minimum hold-time requirements |
| Open-drain RESET with 6V tolerance | Allows pullup to auxiliary supply (e.g., +5V) while monitoring +3.3V rail - simplifies multi-rail system reset coordination |
| Immunity to short VCC transients | Rejects glitches <100ns wide - prevents spurious resets from digital switching noise or ESD coupling |
| Ultra-low quiescent current | 5μA typical at +25°C - extends battery life in always-on IoT sensors and wearables |
Applications
| Battery-Powered Medical Sensor | Industrial PLC Controller |
|---|---|
|
Use Scenario: A wearable ECG sensor powered by a CR2032 coin cell must maintain accurate timing and memory retention during voltage sag between battery replacements. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset to the ARM Cortex-M0+ MCU when VCC drops below 3.00V, preventing corrupted ADC sampling or flash writes. Use Value: 5μA supply current extends operational life beyond 3 years; 20ms reset pulse ensures full register initialization before firmware execution resumes. |
Use Scenario: A DIN-rail mounted programmable logic controller experiences voltage fluctuations due to motor startup surges on its 24VDC input rail. IC Role / Device Role / Timing Role: Monitors local 3.3V LDO output feeding the microcontroller; asserts reset during brownouts caused by transient dips in upstream supply. Use Value: ±3.5% threshold accuracy over –40°C to +125°C ensures consistent trip point across ambient extremes; MR pin enables field-service hard reset via front-panel button. |
| Automotive Telematics Module | Smart Energy Meter |
|
Use Scenario: A CAN-connected telematics unit in a vehicle cabin endures wide temperature swings and load-dump transients on its 12V input. IC Role / Device Role / Timing Role: Resets the host microcontroller when its 3.3V domain sags below 3.00V during cold-crank events, ensuring deterministic boot after recovery. Use Value: Open-drain RESET pulled up to 5V rail enables clean reset signaling to companion CAN transceiver - avoids supply-domain mismatch issues. |
Use Scenario: A utility-grade electricity meter with tamper detection and secure firmware must prevent unauthorized code execution during AC line interruptions. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for the secure bootloader, with MR tied to a sealed test-point for factory calibration reset. Use Value: 100ns MR glitch rejection prevents false triggers from EMI in high-noise meter cabinets; 60ppm/°C tempco maintains threshold stability across seasonal ambient shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US30D2-T | Push-pull RESET output (not open-drain); identical 3.00V threshold and 20ms timeout | Requires same-supply reset signaling; cannot level-shift to higher-voltage rails | Select when system uses single-supply reset architecture and board space permits minor layout change |
| TPS3808G30DBVR | 3.0V threshold, 20ms timeout, but 1.8–6.0V operating range vs. MAX6315's 1.0–5.5V; 2.5μA typical ICC | Higher VCC min (1.8V) limits use in sub-1.8V ultra-low-power designs where MAX6315US30D2-T remains functional down to 1.0V | Prefer for new designs targeting lowest possible ICC; verify MR compatibility - TPS3808 uses active-high MR vs. MAX6315's active-low |
Compared with MAX6315US30D2-T, MAX6314US30D2-T lacks level-shifting capability due to push-pull output, while TPS3808G30DBVR offers lower ICC but sacrifices sub-1.8V operation and uses inverted MR polarity - requiring schematic and firmware review for drop-in replacement.
Availability
MAX6315US30D2-T is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC controllers, automotive telematics modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6315US30D2-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, with leadership in precision sensing, power management, and reliability-critical ICs.
The MAX6315 series belongs to Analog Devices' supervisory circuits product line, designed specifically for robust, low-power power-supply monitoring in safety- and uptime-sensitive embedded systems across automotive, industrial, and medical domains.
FAQ
What is the exact reset threshold voltage of the MAX6315US30D2-T?
The MAX6315US30D2-T has a factory-trimmed nominal reset threshold of 3.00V, with tolerance of ±3.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during manufacturing and documented in the Electrical Characteristics table under "Reset Threshold (VTH)" with specified min/max bounds per temperature grade.
Does the MAX6315US30D2-T support operation below 1.8V?
Yes, the MAX6315US30D2-T operates down to 1.0V supply voltage, as confirmed in the Electrical Characteristics table under "Operating Voltage Range (VCC)". This enables use in ultra-low-power systems where other supervisors (e.g., TPS3808) cut off at 1.8V, making MAX6315US30D2-T suitable for sub-1.8V brownout detection.
Can the RESET output of the MAX6315US30D2-T be pulled up to 5V while monitoring a 3.3V VCC rail?
Yes, the MAX6315US30D2-T RESET output is open-drain and rated for up to +6.0V on the RESET pin, allowing it to be pulled up to 5V (or any voltage ≤6V) independently of the 3.3V VCC rail being monitored. This enables level-shifted reset signaling - a key feature confirmed in the Pin Description and Absolute Maximum Ratings sections.
What is the minimum reset timeout period for the MAX6315US30D2-T?
The MAX6315US30D2-T has a minimum reset timeout period of 20ms, as indicated by the "D2" suffix in its part number and verified in the Ordering Information and Electrical Characteristics tables. This value is guaranteed over –40°C to +125°C and represents the shortest duration RESET remains asserted after VCC recovery or MR deassertion.
Is an external pullup resistor required for the RESET pin of the MAX6315US30D2-T?
Yes, the MAX6315US30D2-T RESET pin is open-drain and requires an external pullup resistor to establish a valid high logic level when deasserted. A 10kΩ resistor is recommended in most applications, as stated in the Detailed Description section - this value ensures adequate noise margin while limiting current draw during reset assertion.
MAX6315US30D2-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:
- 3V
- 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
MAX6315US30D2-T FAQ
1.How can I place an order for MAX6315US30D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US30D2-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 MAX6315US30D2-T reliable?
The price and inventory of MAX6315US30D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US30D2-T is usually 5 days.
3.What payment methods are accepted for MAX6315US30D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US30D2-T transactions.
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4.How is shipping managed for MAX6315US30D2-T?
MAX6315US30D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US30D2-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 MAX6315US30D2-T?
For technical support, including MAX6315US30D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US30D2-T requirements.
6.How does Aetrix verify that MAX6315US30D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US30D2-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 MAX6315US30D2-T meets industry standards.
7.What is the process for return or replacement of MAX6315US30D2-T?
All MAX6315US30D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US30D2-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 MAX6315US30D2-T part is unused and in its original packaging.
Return procedure for MAX6315US30D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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