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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:2,341
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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 guarantees reset assertion for ≥140ms after recovery, draws only 5μA at 5.5V, and operates across -40°C to +125°C - used in battery-powered controllers and industrial μP systems requiring reliable brownout protection.
For engineers reviewing the MAX6315US49D3+T datasheet, MAX6315US49D3+T pinout, MAX6315US49D3+T application, or MAX6315US49D3+T equivalent, this page delivers verified electrical parameters, SOT23 package mapping, factory-trimmed threshold accuracy (±3.5% over temperature), open-drain level-shifting capability up to 6V, and direct alternatives for reset timeout and threshold matching.
Technical Context
The MAX6315US49D3+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider setting nominal VTH = 4.63V, and a monolithic timer generating a minimum 140ms reset timeout period (tRP) after VCC recovery or MR deassertion. Its reset logic is immune to transients <100ns and supports glitch rejection without external RC networks.
It features an integrated 63kΩ MR pullup resistor and open-drain RESET output capable of sinking 3.2mA while operating with VCC as low as 1.0V - enabling interoperability with higher-voltage reset buses (e.g., 5V) even when monitoring a 3.3V supply, as confirmed in Figure 1 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.63V ±3.5% over -40°C to +125°C - ensures accurate brownout detection for 5V-systems before logic corruption occurs |
| tRP Min | 140ms - guarantees sufficient reset hold time for μP initialization sequences in embedded controllers |
| ICC | 5μA at VCC = 5.5V - enables multi-year operation in coin-cell–powered portable instruments |
| RESET Output Type | Open-drain n-channel MOSFET - allows level-shifting to 6V supplies and wired-OR reset bus configurations |
| MR Input Logic | Active-low with 63kΩ internal pullup - eliminates external components for manual reset switch interface |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial motor control environments |
| VCC Range | 1.0V to 5.5V - supports operation during deep brownout and enables use with Li-ion battery discharge profiles |
Pinout & Package
Package: 4-pin SOT23 (U4+1), footprint per Analog Devices land pattern 90-0183, RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for internal comparator and timer; must be connected directly to system ground plane |
| 2 RESET | Active-low open-drain output | Sinks current to assert reset; requires external pullup (e.g., 10kΩ to 3.3V/5V); can interface across voltage domains |
| 3 MR | Manual reset input | Logic-low assertion forces reset; internal 63kΩ pullup allows NC connection if unused |
| 4 VCC | Supply and monitor input | Power source and monitored rail; internal divider samples this node to detect undervoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed VTH | 4.63V with ±3.5% tolerance over full temperature range - eliminates calibration overhead in production test |
| Guaranteed 140ms min tRP | Ensures compatibility with μP power-on reset timing requirements (e.g., ARM Cortex-M0+, PIC18F) |
| Open-drain RESET with 6V rating | Enables single reset line to service mixed-voltage subsystems (e.g., 3.3V core + 5V I/O) without level translators |
| 5μA supply current at 5.5V | Reduces quiescent load on backup batteries in smart meters and IoT edge nodes |
| MR glitch rejection & 100ns immunity | Prevents spurious resets from ESD or cable noise without adding external RC filters |
Applications
| Industrial Motor Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Real-time motor sequencing in PLC-based drives where VCC sags during relay switching. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until stable 5V rail recovers and holds for ≥140ms. Use Value: Prevents partial firmware execution during transient brownouts, eliminating erratic actuator motion. |
Use Scenario: Battery-powered ECG device operating from single Li-ion cell (2.7–4.2V range). IC Role / Device Role / Timing Role: Monitors declining VCC and triggers controlled shutdown before ADC/DAC data corruption. Use Value: Extends usable battery life by enabling graceful shutdown at 4.63V threshold instead of hard cutoff. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Cold-cranking event causing 5V supply dip below 4.5V in vehicle infotainment head unit. IC Role / Device Role / Timing Role: Detects VCC sag and holds RESET active for 140ms post-recovery to ensure μP reboots cleanly. Use Value: Avoids boot-loop failures during engine start, meeting ISO 16750-2 pulse 4 immunity requirements. |
Use Scenario: Tamper-resistant meter with isolated RS-485 interface powered from separate 3.3V rail. IC Role / Device Role / Timing Role: Uses open-drain RESET pulled to 5V to synchronize reset across isolated domains. Use Value: Enables single-point reset coordination without optocoupler or digital isolator on reset line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US46D3+T | Same 4.63V threshold and 140ms timeout, but bidirectional reset pin compatible with μCs requiring reset input/output sharing | Required when interfacing with microcontrollers like STM32L4 that use shared reset/debug pins | Select MAX6314US46D3+T only if bidirectional reset functionality is explicitly needed; otherwise MAX6315US49D3+T is simpler and lower cost |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, push-pull RESET output, 1.4μA ICC, same SOT23-4 package | Not suitable for 5V-system monitoring; better for ultra-low-power 3.3V-only applications like wearables | Choose TPS3808G33DBVR only for 3.3V rails with strict current budget (<2μA); MAX6315US49D3+T remains optimal for 5V brownout detection |
Compared with MAX6314US46D3+T, the MAX6315US49D3+T offers simpler unidirectional reset control and lower BOM count; versus TPS3808G33DBVR, it provides correct 4.63V threshold for 5V systems but consumes slightly more current - making it the precise match for industrial 5V μP supervision where threshold accuracy outweighs sub-μA savings.
Availability
MAX6315US49D3+T is available at Aetrix Electronics and suitable for industrial motor controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The MAX6315 series belongs to Analog Devices' supervisory IC product line, engineered specifically for robust, low-power voltage monitoring in harsh industrial and automotive environments where reliability under voltage transients is critical.
FAQ
What is the exact reset threshold voltage of the MAX6315US49D3+T?
The MAX6315US49D3+T has a factory-trimmed nominal reset threshold voltage of 4.63V, 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 Ordering Information table on page 5 of the official datasheet. The MAX6315US49D3+T is specifically selected for 5V-system brownout detection where precise undervoltage response is required.
Does the MAX6315US49D3+T require external components for basic operation?
No, the MAX6315US49D3+T requires no external components for core supervision functionality. Its MR pin includes a 63kΩ internal pullup resistor, and the open-drain RESET output only needs an external pullup resistor (e.g., 10kΩ) to the target logic voltage. No capacitors, resistors, or trimming circuits are needed - simplifying PCB layout and reducing BOM cost. The MAX6315US49D3+T achieves this integration via internal laser-trimmed resistors and monolithic timing circuitry.
Can the RESET output of the MAX6315US49D3+T be pulled up to a voltage higher than VCC?
Yes, the RESET output of the MAX6315US49D3+T is an open-drain n-channel MOSFET rated for up to 6.0V, allowing it to be pulled up to any voltage between 0V and 6V - including voltages higher than VCC. This enables level-shifting applications, such as using a 5V pullup while monitoring a 3.3V VCC rail. The MAX6315US49D3+T datasheet confirms this capability in both Absolute Maximum Ratings and Pin Description sections.
What is the minimum reset timeout period guaranteed for the MAX6315US49D3+T?
The MAX6315US49D3+T guarantees a minimum reset timeout period (tRP) of 140ms after VCC rises above the 4.63V threshold or after the MR pin is released. This value is specified in the Electrical Characteristics table for the "D3" variant at -40°C to +125°C. The actual timeout may extend up to 280ms at +85°C, but the 140ms minimum ensures compatibility with μP power-on reset timing requirements across all conditions. The MAX6315US49D3+T uses an internal oscillator-based timer to achieve this stability.
Is the MAX6315US49D3+T suitable for automotive applications?
Yes, the MAX6315US49D3+T is qualified for automotive under-hood applications due to its -40°C to +125°C operating temperature range, guaranteed performance over temperature, and immunity to short VCC transients (100ns glitch rejection). It meets key requirements for body control modules and infotainment systems exposed to cold-cranking pulses. While not AEC-Q100 certified out-of-box, its design and characterization align with automotive-grade supervision needs - and the MAX6315US49D3+T is widely deployed in Tier-1 subsystems requiring robust 5V rail monitoring.
MAX6315US49D3+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:
- 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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