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Analog Devices Inc./Maxim Integrated MAX6315US44D2-T
- Part No.:
- MAX6315US44D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US44D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
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Product details
Overview
The MAX6315US44D2-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 20ms minimum reset timeout period, consumes only 5μA typical supply current at 5.5V, and operates across -40°C to +125°C for use in industrial-grade embedded controllers and battery-powered instrumentation.
For engineers reviewing the MAX6315US44D2-T datasheet, MAX6315US44D2-T pinout, MAX6315US44D2-T application, or MAX6315US44D2-T equivalent, key selection criteria include factory-trimmed 4.39V reset threshold, 20ms min 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 MAX6315US44D2-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider setting nominal VTH = 4.39V ±3.5% over -40°C to +125°C, and integrates a monolithic timer circuit that enforces a fixed 20ms minimum reset timeout after VCC recovery or MR deassertion. Its MR input includes a 63kΩ internal pullup and 100ns glitch rejection.
This device uses an open-drain n-channel MOSFET for RESET output, enabling connection to pullup voltages up to +6V independent of VCC, and features immunity to short VCC transients (e.g., <100ns glitches rejected at 100mV overdrive). It draws ≤15μA max ICC over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.39V - Factory-laser-trimmed threshold ensures accurate brownout detection without external components. |
| tRP Min | 20ms - Internally programmed reset timeout guarantees sufficient processor initialization time after power recovery. |
| ICC Max | 15μA @ -40°C to +125°C - Ultra-low quiescent current enables long battery life in portable systems. |
| Operating Temp | -40°C to +125°C - Qualified for harsh industrial and automotive under-hood environments. |
| RESET Output | Open-drain, 0.4V max VOL @ 3.2mA - Supports level-shifting and wired-OR configurations with external pullup. |
| VCC Range | 1.0V to 5.5V - Functions down to 1V VCC, ensuring reset assertion during deep brownout conditions. |
| MR Input | Internal 63kΩ pullup, 1μs min pulse width - Eliminates need for external pullup or debounce circuitry. |
Pinout & Package
MAX6315US44D2-T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1), with 1.3mm × 0.8mm footprint and 0.95mm height, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection. |
| RESET | Active-low open-drain output | Drives μP reset pin low; requires external pullup (e.g., 10kΩ) to any supply ≤6V, enabling level-shifted reset signaling. |
| MR | Manual reset input | Logic-low assertion forces immediate reset; internal 63kΩ pullup allows direct switch-to-GND interface without external components. |
| VCC | Supply and monitor input | Power source and monitored rail; internal voltage divider samples this node to detect undervoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed VTH | 4.39V ±3.5% over -40°C to +125°C eliminates calibration effort and improves system reliability vs. resistor-based solutions. |
| Fixed 20ms reset timeout | Guaranteed minimum duration ensures full microcontroller initialization before release, preventing premature code execution. |
| Open-drain RESET with >VCC capability | Enables reset signaling across different supply domains (e.g., 3.3V monitored rail driving 5V μP reset line). |
| Immunity to short VCC transients | Rejects <100ns glitches at ≥100mV overdrive, reducing false resets in electrically noisy environments. |
| Ultra-low 5μA typical ICC | Minimizes standby power draw in always-on or battery-backed applications such as smart sensors and portable test equipment. |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers operating in factory-floor environments with fluctuating 24VDC-derived 5V rails. IC Role / Device Role / Timing Role: Supervisory circuit monitoring regulated 5V supply and asserting reset during voltage sags caused by motor switching noise. Use Value: Prevents firmware lockup by guaranteeing 20ms reset hold time after recovery, while 4.39V threshold matches common 5V±5% tolerance rails. | Use Scenario: Remote environmental sensors powered by coin-cell batteries requiring multi-year operational life. IC Role / Device Role / Timing Role: Low-power reset supervisor ensuring clean μC startup during cold-start or battery replacement. Use Value: 5μA max supply current extends battery life; open-drain RESET allows direct interface with 3.0V μC reset pin even when VCC drops to 1.0V. |
| Medical Diagnostic Handhelds | Automotive Body Control Modules |
Use Scenario: Portable ultrasound or glucose meters subjected to thermal cycling and ESD events. IC Role / Device Role / Timing Role: Voltage monitor and manual reset initiator via tactile button, with internal MR pullup eliminating BOM cost. Use Value: 100ns MR glitch rejection prevents accidental resets; -40°C to +125°C rating supports operation inside sealed enclosures exposed to ambient extremes. | Use Scenario: Under-dash BCMs powered from vehicle battery with wide input variation (9V–16V) and load-dump transients. IC Role / Device Role / Timing Role: Reset generator triggered by 5V LDO output, providing brownout protection during cranking events. Use Value: Immunity to sub-100ns VCC dips avoids spurious resets during alternator ripple; 4.39V threshold aligns with 5V rail specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US44D2-T | Bidirectional reset pin support; otherwise identical VTH, tRP, and package. | Required only for μCs with bidirectional reset I/O (e.g., certain ARM Cortex-M variants); not needed for standard active-low reset inputs. | Select MAX6314US44D2-T only if the target microcontroller uses a shared reset/programming pin requiring bidirectional control. |
| TPS3808G33DBVR | 3.3V fixed VTH; 20ms timeout; 1.5μA ICC; same SOT23-6 package but different pinout. | Not pin-compatible; requires PCB redesign; suited for 3.3V systems where tighter VTH tolerance (±0.5%) is critical. | Choose TPS3808G33DBVR only when 3.3V threshold and ultra-low 1.5μA current outweigh SOT23-4 footprint and pinout advantages. |
Compared with MAX6314US44D2-T, the MAX6315US44D2-T offers simpler unidirectional reset control and identical timing/supply specs; versus TPS3808G33DBVR, it trades lower current for broader VTH flexibility and direct SOT23-4 compatibility-critical for space-constrained legacy designs.
Availability
MAX6315US44D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical handheld diagnostics, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US44D2-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 belongs to Analog Devices' precision supervisory IC product line, designed specifically for reliable power-on reset, brownout detection, and manual reset integration in resource-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US44D2-T?
The MAX6315US44D2-T has a factory-trimmed nominal reset threshold voltage of 4.39V, with tolerance of ±3.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during manufacturing and does not require external calibration. The MAX6315US44D2-T maintains this accuracy without additional components, making it suitable for 5V systems where precise brownout detection is required.
Does the MAX6315US44D2-T support manual reset functionality?
Yes, the MAX6315US44D2-T includes a dedicated MR (manual reset) input pin with internal 63kΩ pullup resistance. A logic-low pulse ≥1μs on MR immediately asserts the RESET output, which remains active for the full 20ms timeout period after MR returns high. No external pullup or debounce circuitry is needed, simplifying design for pushbutton-initiated resets in the MAX6315US44D2-T.
Can the RESET output of the MAX6315US44D2-T be pulled up to a voltage higher than VCC?
Yes, the MAX6315US44D2-T features an open-drain RESET output rated for voltages up to +6.0V, allowing it to be pulled up to a supply rail higher than its own VCC. This enables level-shifting-for example, using the MAX6315US44D2-T to monitor a 3.3V rail while driving a 5V microcontroller reset input-without additional interface circuitry.
What is the maximum supply current consumption of the MAX6315US44D2-T over temperature?
The MAX6315US44D2-T consumes a maximum of 15μA supply current over the full operating temperature range of -40°C to +125°C at VCC = 5.5V. At room temperature (25°C), typical current is 5μA. This ultra-low power draw makes the MAX6315US44D2-T ideal for battery-powered and energy-sensitive applications where standby current directly impacts operational lifetime.
Is the MAX6315US44D2-T pin-compatible with other devices in the MAX6315 family?
Yes, all MAX6315 variants-including the MAX6315US44D2-T-are fully pin-compatible within the SOT23-4 package. Differences between part numbers relate solely to factory-set reset threshold (e.g., 4.39V) and minimum timeout period (20ms), with identical pinout (VCC, MR, RESET, GND), electrical behavior, and thermal specifications. This allows drop-in replacement across thresholds and timeouts without layout changes.
MAX6315US44D2-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:
- 4.39V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US44D2-T FAQ
1.How can I place an order for MAX6315US44D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US44D2-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 MAX6315US44D2-T reliable?
The price and inventory of MAX6315US44D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US44D2-T is usually 5 days.
3.What payment methods are accepted for MAX6315US44D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US44D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US44D2-T?
MAX6315US44D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US44D2-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 MAX6315US44D2-T?
For technical support, including MAX6315US44D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US44D2-T requirements.
6.How does Aetrix verify that MAX6315US44D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US44D2-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 MAX6315US44D2-T meets industry standards.
7.What is the process for return or replacement of MAX6315US44D2-T?
All MAX6315US44D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US44D2-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 MAX6315US44D2-T part is unused and in its original packaging.
Return procedure for MAX6315US44D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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