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Analog Devices Inc./Maxim Integrated MAX6315US44D3+T
- Part No.:
- MAX6315US44D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US44D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,718
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Product details
Overview
The MAX6315US44D3+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 4.39V 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 MAX6315US44D3+T datasheet, MAX6315US44D3+T pinout, MAX6315US44D3+T application, or MAX6315US44D3+T equivalent, key selection criteria include factory-trimmed 4.39V reset threshold, 140ms minimum timeout, SOT23-4 package compatibility, open-drain RESET output capable of level-shifting above VCC, and guaranteed operation over extended temperature range.
Technical Context
The MAX6315US44D3+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set nominal 4.39V 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 deassertion.
It features an integrated 63kΩ pullup on MR, immunity to VCC transients <100ns, and an open-drain n-channel MOSFET RESET output rated for 0.3V max VOL at 1.2mA sink current - enabling direct interface with μP reset inputs powered by supplies up to 6V, independent of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.39V nominal, ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 4.5V nominal systems |
| Reset Timeout Period | 140ms minimum - guarantees sufficient reset hold time for slow-starting microcontrollers | Supply Current | 5μA typical at 5.5V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Temperature | -40°C to +125°C - supports under-hood automotive and industrial motor control applications |
| RESET Output Type | Open-drain, 0.3V max VOL at 1.2mA - allows level-shifting to higher-voltage logic domains (up to 6V) |
| MR Input Pullup | 63kΩ internal - eliminates external components for manual reset switch implementation |
Pinout & Package
Package: 4-pin SOT23 (U4+1), 1.3mm × 2.9mm footprint, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for internal comparator and timer; must be low-impedance connection to system ground plane |
| RESET | Active-low open-drain output | Sinks current to assert reset; requires external pullup to target logic supply (0–6V); not internally driven high |
| MR | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ resistor; debounced internally; 1μs minimum pulse width |
| VCC | Supply and monitor input | Powers device and provides monitored voltage source; valid from 1.0V to 5.5V; reset asserted if VCC < 4.39V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.39V threshold | Eliminates external resistor divider and calibration, reducing BOM count and board space in space-constrained designs |
| 140ms minimum reset timeout | Ensures full initialization of complex microcontrollers before release, avoiding boot failures in safety-critical firmware |
| Open-drain RESET with 6V tolerance | Enables single reset supervisor to serve multiple voltage domains (e.g., 3.3V μP reset controlled from 5V domain) |
| 5μA supply current | Extends battery life in portable medical devices and wireless sensor nodes where duty-cycle optimization is critical |
| Guaranteed operation to +125°C | Supports deployment in engine control units, power inverters, and industrial PLCs without derating or thermal margin loss |
Applications
| Industrial Motor Drives | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Microcontroller-based gate driver boards operating near motors with high EMI and thermal stress. IC Role / Device Role / Timing Role: Voltage supervisor ensuring clean reset during voltage sags caused by inductive load switching or thermal throttling. Use Value: 4.39V threshold matches 4.5V rail tolerances; 140ms timeout accommodates slow power-rail stabilization in high-capacitance drive circuits. | Use Scenario: Remote environmental monitoring node powered by CR2032 coin cell with 10-year lifetime target. IC Role / Device Role / Timing Role: Low-power reset generator maintaining system integrity during cold-start and battery voltage decay. Use Value: 5μA ICC enables >10-year shelf life; open-drain RESET allows direct interface with 3.3V μC while VCC drops to 1.0V. |
| Automotive Body Control Modules | Programmable Logic Controllers |
Use Scenario: Under-dash BCM modules exposed to wide ambient temperatures (-40°C to +125°C) and load-dump transients. IC Role / Device Role / Timing Role: High-reliability reset supervisor immune to short VCC glitches and qualified for automotive extended temperature range. Use Value: Guaranteed operation to +125°C and ±3.5% threshold accuracy ensure deterministic reset behavior across full AEC-Q100 Grade 1 range. | Use Scenario: DIN-rail mounted PLC CPU module requiring fail-safe startup after AC power interruption. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset until 24V DC rail stabilizes and firmware completes self-test. Use Value: 140ms timeout exceeds typical 100ms power-supply hold-up time; MR pin enables remote watchdog-triggered restart via PLC I/O. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US44D2+T | Same 4.39V threshold but 20ms (min) reset timeout vs. 140ms | Suitable for fast-boot microcontrollers; insufficient for systems requiring longer initialization | Select when shorter reset hold time is acceptable and faster recovery is prioritized |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.4μA ICC, SOT23-6 package | Lower quiescent current but incompatible threshold; requires PCB redesign due to 6-pin layout | Consider only if 3.3V rail supervision is needed and board space allows 6-pin footprint |
Compared with MAX6315US44D2+T and TPS3808G33DBVR, the MAX6315US44D3+T uniquely delivers 4.39V precision threshold with 140ms minimum timeout in a 4-pin SOT23 - making it optimal for legacy 4.5V systems needing extended reset assertion without layout changes.
Availability
MAX6315US44D3+T is available at Aetrix Electronics and suitable for industrial motor drives, battery-powered data loggers, automotive body control modules, and programmable logic controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US44D3+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, designed specifically for reliable, low-power reset generation in harsh-environment embedded systems with strict voltage and timing requirements.
FAQ
What is the exact reset threshold voltage of the MAX6315US44D3+T?
The MAX6315US44D3+T has a factory-trimmed nominal reset threshold of 4.39V, with tolerance of ±3.5% over the full -40°C to +125°C operating range. This value is laser-trimmed during production and specified in the Ordering Information table of the official datasheet. The MAX6315US44D3+T does not support adjustable thresholds - all variants are fixed at their designated voltage.
Does the MAX6315US44D3+T require external components for basic operation?
No, the MAX6315US44D3+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 (typically 10kΩ) to the target logic supply. No capacitors, resistors, or trimming networks are needed - simplifying design and improving reliability compared to discrete reset solutions.
Can the RESET output of the MAX6315US44D3+T be pulled up to a voltage higher than VCC?
Yes, the MAX6315US44D3+T's RESET output is an open-drain n-channel MOSFET rated for voltages up to +6.0V, allowing it to be pulled up to a supply rail higher than VCC (e.g., 5V RESET line while VCC = 3.3V). This enables level-shifting between power domains. However, the pullup voltage must not exceed 6.0V, and VOL remains ≤0.3V at 1.2mA sink current regardless of pullup voltage.
What is the minimum reset timeout period guaranteed for the MAX6315US44D3+T?
The MAX6315US44D3+T guarantees a minimum reset timeout period of 140ms after VCC rises above 4.39V or after the MR input is released. This value is tested and specified over the full -40°C to +125°C temperature range. Typical values reach 200ms, and maximum is 280ms - providing robust margin for microcontroller initialization sequences.
Is the MAX6315US44D3+T pin-compatible with other members of the MAX6315 family?
Yes, all MAX6315 variants - including MAX6315US44D3+T - share identical 4-pin SOT23 (U4+1) packaging and pinout (VCC, MR, RESET, GND). This allows drop-in replacement across different threshold and timeout combinations without PCB modification, provided the new variant's electrical characteristics meet the system's voltage and timing requirements.
MAX6315US44D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.39V
- 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
MAX6315US44D3+T FAQ
1.How can I place an order for MAX6315US44D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US44D3+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 MAX6315US44D3+T reliable?
The price and inventory of MAX6315US44D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US44D3+T is usually 5 days.
3.What payment methods are accepted for MAX6315US44D3+T?
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4.How is shipping managed for MAX6315US44D3+T?
MAX6315US44D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US44D3+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 MAX6315US44D3+T?
For technical support, including MAX6315US44D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US44D3+T requirements.
6.How does Aetrix verify that MAX6315US44D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US44D3+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 MAX6315US44D3+T meets industry standards.
7.What is the process for return or replacement of MAX6315US44D3+T?
All MAX6315US44D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US44D3+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 MAX6315US44D3+T part is unused and in its original packaging.
Return procedure for MAX6315US44D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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