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Analog Devices Inc./Maxim Integrated MAX6315US35D3-T
- Part No.:
- MAX6315US35D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US35D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,639
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Product details
Overview
The MAX6315US35D3-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 3.5V (±3.5% over -40°C to +125°C) or upon manual reset assertion; it guarantees reset assertion for ≥140ms after recovery, draws only 5μA at 5.5V, and operates from 1.0V to 5.5V in battery-powered instrumentation and embedded controllers.
For engineers reviewing the MAX6315US35D3-T datasheet, MAX6315US35D3-T pinout, MAX6315US35D3-T application, or MAX6315US35D3-T equivalent, key selection criteria include factory-trimmed 3.5V reset threshold accuracy, 140ms minimum timeout period across full temperature range, open-drain RESET output compatible with supplies up to +6V, and guaranteed operation from -40°C to +125°C.
Technical Context
The MAX6315US35D3-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set nominal 3.5V reset threshold, with ±3.5% tolerance over -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed reset timeout of ≥140ms (min) after VCC rises above threshold or MR deasserts.
It features an open-drain n-channel MOSFET RESET output capable of sinking 3.2mA at VCC > 4.25V while maintaining VOL ≤ 0.4V, and includes a manual reset input (MR) with 63kΩ internal pullup, 1μs minimum pulse width, and 100ns glitch rejection - all integrated in a 4-pin SOT23 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.5V ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 3.3V systems with margin |
| Reset Timeout Period | ≥140ms (min) - guarantees sufficient reset hold time for μP initialization sequences |
| Supply Current | 5μA at VCC = 5.5V, TA = -40°C to +85°C - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 1.0V to 5.5V - supports single-cell Li-ion, 3.3V, and 5V logic domains |
| RESET Output Type | Open-drain, rated to 6V - allows level-shifting to higher-voltage reset buses without external components |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup when MR is unused or switch-connected |
Pinout & Package
MAX6315US35D3-T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and thermal pad omitted. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC (top-view orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal comparator and timer; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks current during reset; requires external pullup to any supply ≤6V; drives μP reset pin directly |
| MR (Pin 3) | Manual reset input | Logic-low assertion forces reset; internally pulled up to VCC; debounced via 100ns glitch filter |
| VCC (Pin 4) | Supply and monitor input | Powers device and provides monitored voltage source; internal divider sets 3.5V threshold relative to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.5V reset threshold | Eliminates external resistor network and calibration; achieves ±3.5% accuracy over full industrial temperature range |
| 140ms minimum reset timeout | Ensures μP completes power-on self-test and register initialization before release |
| Open-drain RESET output rated to +6V | Enables direct interface to 5V reset buses while powered from 3.3V or lower supplies |
| 63kΩ internal MR pullup | Reduces BOM count by removing external resistor; supports momentary switch-to-ground configuration |
| 5μA supply current at 5.5V | Extends battery runtime in always-on monitoring applications such as smart sensors and IoT endpoints |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous operation in unattended remote sites with fluctuating 24VDC supply converted to 3.3V. IC Role / Device Role / Timing Role: Supervises 3.3V rail and asserts reset if input converter drops out or brownouts occur. Use Value: Prevents corrupted firmware execution during undervoltage events; 140ms timeout accommodates slow-rising regulated outputs. | Use Scenario: Multi-year deployment in environmental monitoring nodes powered by coin-cell or Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Monitors battery voltage decay and triggers controlled shutdown/reset before data loss. Use Value: 5μA quiescent current minimizes drain; 3.5V threshold aligns with end-of-life voltage for common primary cells. |
| Medical Handheld Diagnostics | Automotive Body Control Modules |
Use Scenario: Portable ultrasound or glucose meter requiring FDA-grade reliability and cold-temperature startup. IC Role / Device Role / Timing Role: Ensures μP resets cleanly during battery insertion or low-temp power-up. Use Value: Guaranteed -40°C to +125°C operation and ±3.5% threshold stability prevent false resets in clinical environments. | Use Scenario: Under-hood electronics exposed to wide thermal cycling and load-dump transients. IC Role / Device Role / Timing Role: Provides robust reset supervision for 3.3V microcontroller domain powered from vehicle battery. Use Value: Immunity to short VCC transients (<100ns) and 60ppm/°C tempco maintain timing integrity across engine bay temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US35D3-T | Bidirectional reset pin; supports μPs with active-high or active-low reset inputs | Required for microcontrollers with shared reset/data pins (e.g., certain ARM Cortex-M variants) | Select when bidirectional reset capability is needed; otherwise MAX6315US35D3-T offers lower cost and simpler layout |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 3.5V); 200ms timeout; push-pull RESET output | Better suited for strict 3.3V systems where 3.5V threshold causes premature reset assertion | Choose when system VCC nominal is exactly 3.3V and push-pull drive is preferred over open-drain flexibility |
Compared with MAX6314US35D3-T and TPS3808G33DBVR, the MAX6315US35D3-T delivers optimal trade-off of precise 3.5V threshold alignment, ultra-low 5μA supply current, and open-drain level-shifting - making it ideal for 3.3V-based portable and industrial controllers where reset timing margin and supply flexibility are critical.
Availability
MAX6315US35D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and medical handheld diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US35D3-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 MAX6315 series is part of Analog Devices' precision supervisory IC portfolio, engineered specifically for reliable power-on reset, brownout protection, and manual reset integration in space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US35D3-T?
The MAX6315US35D3-T has a factory-trimmed nominal reset threshold of 3.5V, with tolerance of ±3.5% over the full operating temperature range (-40°C to +125°C). This means the actual threshold falls between 3.3775V and 3.6225V under worst-case conditions, ensuring compatibility with 3.3V systems requiring headroom against ripple and dropout.
How long does the MAX6315US35D3-T hold reset asserted after VCC recovers?
The MAX6315US35D3-T holds the RESET output asserted for a minimum of 140ms after VCC rises above the 3.5V threshold. This timeout is guaranteed across -40°C to +125°C and provides sufficient hold time for most microprocessors to complete power-on initialization, including clock stabilization and memory self-test routines.
Can the MAX6315US35D3-T's RESET output be pulled up to a voltage higher than its VCC supply?
Yes, the MAX6315US35D3-T's RESET output is an open-drain structure rated to 6.0V, allowing it to be pulled up to any supply between 0V and +6V - even one higher than the VCC applied to Pin 4. This enables level-shifting functionality, such as driving a 5V microcontroller reset input while the MAX6315US35D3-T itself is powered from a 3.3V rail.
Does the MAX6315US35D3-T require external components for basic operation?
No, the MAX6315US35D3-T requires no external components for core supervision functionality. It integrates laser-trimmed voltage-divider resistors, internal timing capacitor, and a 63kΩ MR pullup resistor. Only an external pullup resistor on the RESET pin is needed - typically 10kΩ - to establish logic-high state when reset is inactive.
What is the supply current consumption of the MAX6315US35D3-T at 3.6V and room temperature?
At VCC = 3.6V and TA = +25°C, the MAX6315US35D3-T consumes 4μA typical supply current, with a maximum of 10μA over -40°C to +85°C. This ultra-low quiescent current makes it suitable for always-on battery-powered applications where multi-year operational life is required.
MAX6315US35D3-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:
- 3.5V
- 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
MAX6315US35D3-T FAQ
1.How can I place an order for MAX6315US35D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US35D3-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 MAX6315US35D3-T reliable?
The price and inventory of MAX6315US35D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US35D3-T is usually 5 days.
3.What payment methods are accepted for MAX6315US35D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US35D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US35D3-T?
MAX6315US35D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US35D3-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 MAX6315US35D3-T?
For technical support, including MAX6315US35D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US35D3-T requirements.
6.How does Aetrix verify that MAX6315US35D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US35D3-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 MAX6315US35D3-T meets industry standards.
7.What is the process for return or replacement of MAX6315US35D3-T?
All MAX6315US35D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US35D3-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 MAX6315US35D3-T part is unused and in its original packaging.
Return procedure for MAX6315US35D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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