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Analog Devices Inc./Maxim Integrated MAX6315US49D3-T
- Part No.:
- MAX6315US49D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US49D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
The MAX6315US49D3-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 4.63V or when manual reset (MR) is asserted. It features a factory-trimmed 4.63V reset threshold, 140ms minimum reset timeout period, 5μA supply current at +25°C, and operates across –40°C to +125°C for use in battery-powered industrial controllers.
For engineers reviewing the MAX6315US49D3-T datasheet, MAX6315US49D3-T pinout, MAX6315US49D3-T application, or MAX6315US49D3-T equivalent, key selection criteria include guaranteed over-temperature operation, immunity to short VCC transients, open-drain output compatible with supplies up to +6V, and SOT23-4 space-constrained board integration.
Technical Context
The MAX6315US49D3-T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider to set its 4.63V 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 (min) reset pulse after VCC recovery or MR release.
It uses an open-drain n-channel MOSFET for RESET output, enabling level-shifting-e.g., monitoring a 3.3V rail while pulling RESET to a 5V domain-and includes an internal 63kΩ pullup on MR, eliminating external components for manual reset functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3.5% over –40°C to +125°C; ensures reliable brownout detection for 5V systems |
| Reset Timeout Period | 140ms (min) at –40°C to +125°C; guarantees sufficient processor initialization time |
| Supply Current | 5μA typical at +25°C, 15μA max at +125°C; enables multi-year battery life in portable devices |
| Operating Voltage Range | 1.0V to 5.5V; supports operation down to near-dead-battery conditions |
| RESET Output Type | Open-drain, rated to sink 3.2mA at VCC > 4.25V; allows interfacing with higher-voltage logic domains |
| MR Input Threshold | VIL = 0.8V, VIH = 2.4V (for VTH > 4.0V); ensures noise-immune manual reset activation |
| Temp Range | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6315US49D3-T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance |
| RESET (Pin 2) | Active-low open-drain output | Drives external pullup; can interface with logic supplies up to +6V independent of VCC |
| MR (Pin 3) | Manual reset input | Logic-low assertion triggers reset; internal 63kΩ pullup allows direct switch-to-GND connection |
| VCC (Pin 4) | Supply and monitor input | Power source and monitored rail; internally divided to compare against 4.63V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 4.63V with ±3.5% tolerance over full temperature range eliminates calibration overhead |
| Four selectable timeout periods | 140ms minimum timeout ensures compatibility with slow-starting μPs and FPGA configuration sequences |
| Immunity to short VCC transients | Rejects glitches ≤100ns duration, reducing false resets in electrically noisy environments |
| Open-drain RESET with extended voltage range | Supports level-shifting between disparate supply domains (e.g., 3.3V VCC → 5V RESET pullup) |
| Guaranteed operation over temperature | Specified from –40°C to +125°C with no derating required for industrial or automotive under-hood use |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controller operating in factory-floor environments with fluctuating 24VDC-derived 5V rails. IC Role / Device Role / Timing Role: Supervisory circuit monitoring 5V system rail and asserting reset during brownouts or power cycling. Use Value: Prevents firmware corruption by holding μP in reset until stable 5V is confirmed, leveraging 4.63V threshold and 140ms timeout. | Use Scenario: Remote environmental sensor node powered by lithium-thionyl chloride battery with 10+ year lifespan. IC Role / Device Role / Timing Role: Low-current (5μA) supervisor ensuring safe boot after cold start or deep discharge recovery. Use Value: Enables reliable wake-up from ultra-low-power sleep mode without external biasing or trimming components. |
| Automotive Body Control Modules | Medical Infusion Pumps |
Use Scenario: Under-hood BCM exposed to –40°C to +125°C ambient with transient-rich 12V supply. IC Role / Device Role / Timing Role: Reset generator immune to load-dump and cranking transients, tied to regulated 5V domain. Use Value: Maintains deterministic reset behavior despite VCC dips, using 100ns glitch rejection and guaranteed spec compliance at +125°C. | Use Scenario: Life-critical infusion pump requiring fail-safe startup and operator-initiated reset capability. IC Role / Device Role / Timing Role: Dual-role supervisor providing both power-on reset and debounced manual reset via front-panel button. Use Value: Internal MR pullup and 500ns MR-to-RESET delay enable clean, bounce-free reset initiation without added RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS46D3+T | Pin-compatible, same 4.63V threshold and 140ms timeout, but 20μA max ICC at +125°C vs. 15μA for MAX6315US49D3-T | Identical functional scope; used where legacy MAX811 footprint reuse is prioritized | Select when existing layout uses MAX811 footprint and higher supply current is acceptable |
| TPS3808G33DBVR | 3.3V fixed threshold (not adjustable), 200ms timeout, 1.4μA typical ICC; requires external resistor for manual reset | Lower quiescent current but lacks integrated MR pullup and fixed threshold limits 5V system use | Select only for 3.3V systems where ultra-low ICC outweighs need for manual reset integration |
Compared with MAX811TEUS46D3+T and TPS3808G33DBVR, the MAX6315US49D3-T delivers tighter temperature stability (±3.5% vs. ±4%), lower max ICC at +125°C, and fully integrated MR functionality-making it optimal for new 5V industrial designs demanding robustness and component count reduction.
Availability
MAX6315US49D3-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 MAX6315US49D3-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 MAX6315US49D3-T belongs to the MAX63xx family of precision μP supervisory circuits, designed specifically for reliable power-on reset, brownout protection, and manual reset integration in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US49D3-T?
The MAX6315US49D3-T has a factory-trimmed nominal reset threshold of 4.63V, with tolerance of ±3.5% over the full operating temperature range (–40°C to +125°C) and a tempco of 60ppm/°C. This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table under "Reset Threshold (VTH)".
Does the MAX6315US49D3-T support manual reset functionality, and how is it implemented?
Yes, the MAX6315US49D3-T includes a dedicated MR (manual reset) input (Pin 3) with an internal 63kΩ pullup resistor. A logic-low pulse ≥1μs on MR asserts RESET; reset remains active for the full 140ms timeout after MR returns high. No external components are needed-just connect a momentary switch from MR to GND.
Can the RESET output of the MAX6315US49D3-T be pulled up to a voltage higher than its VCC supply?
Yes, the MAX6315US49D3-T features an open-drain RESET output rated to 6.0V absolute maximum. It can be pulled up to any voltage between 0V and +6V-even higher than VCC-enabling level-shifting applications such as monitoring a 3.3V rail while driving a 5V μP reset input.
What is the minimum reset timeout period for the MAX6315US49D3-T, and how is it guaranteed?
The MAX6315US49D3-T guarantees a minimum reset timeout period of 140ms over –40°C to +125°C. This value is tested and specified in the Electrical Characteristics table under "Reset Timeout Period (tRP)" for the D3 variant, with typical values up to 200ms and maximum up to 280ms at +85°C.
Is the MAX6315US49D3-T RoHS-compliant and what package does it use?
Yes, the MAX6315US49D3-T is RoHS-compliant and supplied in a 4-pin SOT23 package (package code U4+1, outline 21-0052). The "+T" suffix denotes tape-and-reel packaging, and the device meets lead(Pb)-free requirements per Analog Devices' standard specifications.
MAX6315US49D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.9V
- 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
MAX6315US49D3-T FAQ
1.How can I place an order for MAX6315US49D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US49D3-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 MAX6315US49D3-T reliable?
The price and inventory of MAX6315US49D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US49D3-T is usually 5 days.
3.What payment methods are accepted for MAX6315US49D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US49D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US49D3-T?
MAX6315US49D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US49D3-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 MAX6315US49D3-T?
For technical support, including MAX6315US49D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US49D3-T requirements.
6.How does Aetrix verify that MAX6315US49D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US49D3-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 MAX6315US49D3-T meets industry standards.
7.What is the process for return or replacement of MAX6315US49D3-T?
All MAX6315US49D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US49D3-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 MAX6315US49D3-T part is unused and in its original packaging.
Return procedure for MAX6315US49D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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