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Analog Devices Inc./Maxim Integrated MAX6315US32D3+T
- Part No.:
- MAX6315US32D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US32D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,633
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Product details
Overview
MAX6315US32D3+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 3.08V or upon manual reset assertion. It provides a guaranteed 140ms (min) reset timeout period, consumes only 5μA typical supply current at 5.5V, and operates across -40°C to +125°C for use in battery-powered industrial controllers and embedded systems.
For engineers reviewing the MAX6315US32D3+T datasheet, MAX6315US32D3+T pinout, MAX6315US32D3+T application, or MAX6315US32D3+T equivalent, key selection criteria include factory-trimmed 3.08V reset threshold accuracy (±3.5% over temperature), immunity to sub-100ns MR glitches, open-drain RESET output capable of level-shifting above VCC, and SOT23-4 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6315US32D3+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 3.08V nominal reset threshold, with ±3.5% tolerance over -40°C to +125°C and 60ppm/°C tempco. Its internal monostable timer generates a fixed 140ms minimum reset timeout after VCC recovery or MR release.
It features an integrated 63kΩ MR pullup resistor, supports manual reset pulse widths as short as 1μs, and guarantees RESET assertion down to VCC = 1.0V. The open-drain RESET output sinks up to 3.2mA at VCC > 4.25V with VOL ≤ 0.4V, enabling interface with higher-voltage logic domains up to +6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal, ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 3.3V systems |
| Reset Timeout Period | 140ms minimum - holds μP in reset long enough for power stabilization and oscillator startup |
| Supply Current | 5μA typical at 5.5V - enables multi-year operation in coin-cell–powered IoT sensors |
| MR Glitch Rejection | 100ns - suppresses EMI-induced false resets on manual reset line |
| RESET Output Type | Open-drain n-channel MOSFET - allows level-shifting to 3.3V, 5V, or mixed-supply reset buses |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| VCC Range | 1.0V to 5.5V - supports operation during deep brownout and ultra-low-power wake-up sequences |
Pinout & Package
MAX6315US32D3+T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1), with 1.3mm × 2.9mm footprint and 0.95mm height - suitable for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for internal comparator and reset timer; must be connected directly to system ground plane |
| RESET | Active-low open-drain output | Sinks current when asserted; requires external pullup to 0–6V supply; compatible with 1.8V/3.3V/5V μP reset inputs |
| MR | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ resistor; debounced by design - no external RC needed |
| VCC | Supply and monitor input | Powers device and feeds internal voltage divider; monitored continuously for threshold violation; valid from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.08V threshold | Eliminates external resistor networks and calibration steps - reduces BOM count and production test time |
| 140ms min reset timeout | Guarantees sufficient hold time for 3.3V microcontrollers with slow clock startups and flash initialization sequences |
| Open-drain RESET with 6V tolerance | Enables single reset supervisor to serve multiple voltage domains (e.g., 3.3V core + 5V I/O) without level translators |
| 5μA supply current | Extends battery life in portable instrumentation and wireless sensor nodes beyond 10 years at 10μA average system sleep current |
| MR glitch rejection (100ns) | Prevents spurious resets from ESD events or cable noise - critical for field-deployed industrial HMI panels |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous operation in factory-floor cabinets with wide ambient temperature swings and noisy 24V DC supplies. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset during 24V-to-3.3V converter brownout or thermal shutdown. Use Value: Prevents firmware corruption by holding Cortex-M4 MCU in reset until regulated 3.3V rail stabilizes within ±2% for ≥140ms. | Use Scenario: Multi-year deployment in remote environmental monitoring stations powered by Li-SOCl₂ cells. IC Role / Device Role / Timing Role: Low-current supervisor monitoring battery voltage decay and triggering graceful shutdown before undervoltage lockout. Use Value: 5μA quiescent current extends usable battery life by >18 months versus comparable 20μA supervisors. |
| Automotive Body Control Modules | Medical Handheld Diagnostics |
Use Scenario: Under-dash ECUs exposed to -40°C cold cranking and +125°C engine-off soak conditions. IC Role / Device Role / Timing Role: Reset generator ensuring PIC18F MCU boots only after 5V domain reaches regulation and crystal oscillator settles. Use Value: -40°C to +125°C qualification and ±3.5% threshold stability eliminate need for external temperature compensation. | Use Scenario: Portable ultrasound probe with dual 3.3V/1.8V rails and strict IEC 60601-1 leakage current limits. IC Role / Device Role / Timing Role: Single-point reset coordination for ARM Cortex-A53 SoC and analog front-end ASIC during power-on sequencing. Use Value: Open-drain RESET allows shared pullup to isolated 3.3V domain - avoids galvanic coupling between patient-connected and digital sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US32D3+T | Bidirectional reset pin architecture; supports μCs requiring reset pin to function as both input and output | Required for STMicro STM32L4x or NXP Kinetis L series with shared reset/debug pins | Select only if target microcontroller mandates bidirectional reset I/O capability |
| TPS3808G33DBVR | Fixed 3.3V threshold; 200ms timeout; 1.6μA supply current; push-pull RESET output | Lacks open-drain flexibility and MR glitch rejection; optimized for ultra-low-power TI MSP430 designs | Prefer when lowest possible quiescent current is critical and level-shifting is unnecessary |
Compared with MAX6314US32D3+T and TPS3808G33DBVR, the MAX6315US32D3+T uniquely combines 3.08V precision threshold, 140ms timeout, open-drain level-shifting, and 100ns MR immunity - making it optimal for robust 3.3V system supervision where manual reset reliability and mixed-voltage interfacing are required.
Availability
MAX6315US32D3+T 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 MAX6315US32D3+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 MAX6315US32D3+T belongs to the MAX63xx family of precision μP supervisory circuits, designed specifically for reliable power-on reset, brownout protection, and manual reset coordination in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US32D3+T?
The MAX6315US32D3+T has a factory-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 laser-trimmed during manufacturing and specified in the Ordering Information table - confirming MAX6315US32D3+T is the 3.08V/140ms variant of the MAX6315 family.
Does the MAX6315US32D3+T require an external pullup resistor on the RESET pin?
Yes, the MAX6315US32D3+T features an open-drain RESET output and requires an external pullup resistor. A 10kΩ resistor to any supply between 0V and +6V is sufficient in most applications. The pullup may connect to the same VCC rail or a different voltage domain - a key design advantage of the MAX6315US32D3+T's level-shifting capability.
What is the minimum reset timeout period guaranteed for the MAX6315US32D3+T?
The MAX6315US32D3+T guarantees a minimum reset timeout period of 140ms after VCC rises above the 3.08V threshold or after the MR input is released. This value is specified in the Electrical Characteristics table under "Reset Timeout Period" for part numbers ending in D3-T, and applies across -40°C to +125°C.
Can the MAX6315US32D3+T operate with VCC below 2.5V?
Yes, the MAX6315US32D3+T operates with VCC as low as 1.0V, and guarantees RESET assertion down to that level. Its internal circuitry remains functional and the reset comparator continues monitoring - a critical feature for low-voltage brownout detection in energy-harvesting and ultra-low-power systems using the MAX6315US32D3+T.
Is the MR input of the MAX6315US32D3+T internally pulled up?
Yes, the MR input of the MAX6315US32D3+T includes an internal 63kΩ pullup resistor to VCC, allowing the pin to be left floating if unused. When implementing manual reset, a normally open switch from MR to GND is sufficient - no external pullup or debounce components are required, simplifying design and reducing cost for systems using the MAX6315US32D3+T.
MAX6315US32D3+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:
- 3.2V
- 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-143-4
MAX6315US32D3+T FAQ
1.How can I place an order for MAX6315US32D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US32D3+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 MAX6315US32D3+T reliable?
The price and inventory of MAX6315US32D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US32D3+T is usually 5 days.
3.What payment methods are accepted for MAX6315US32D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US32D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US32D3+T?
MAX6315US32D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US32D3+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 MAX6315US32D3+T?
For technical support, including MAX6315US32D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US32D3+T requirements.
6.How does Aetrix verify that MAX6315US32D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US32D3+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 MAX6315US32D3+T meets industry standards.
7.What is the process for return or replacement of MAX6315US32D3+T?
All MAX6315US32D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US32D3+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 MAX6315US32D3+T part is unused and in its original packaging.
Return procedure for MAX6315US32D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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