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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:1,646
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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 minimum reset timeout period, consumes only 5μA typical supply current at 5.5V, and operates across -40°C to +125°C for reliable power monitoring in battery-powered microcontroller 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 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 MAX6315US44D3-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 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 the MR input, enabling direct connection of a momentary switch to GND without external components, and its open-drain RESET output supports sink currents up to 3.2mA while allowing pullup to voltages up to 6V - independent of VCC - enabling level-shifted reset signaling across mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.39V nominal, ±3.5% over -40°C to +125°C - ensures accurate brownout detection for 4.5V nominal supplies |
| Reset Timeout Period | 140ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 5μA typical at 5.5V - enables multi-year operation in coin-cell–powered devices |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| RESET Output Type | Open-drain N-channel MOSFET - allows pullup to 0–6V, enabling reset signaling across voltage domains |
| MR Input Pullup | 63kΩ internal - eliminates need for external resistor when using momentary switch to GND |
| VCC Range | 1.0V to 5.5V - supports operation down to near-dead-battery conditions while maintaining reset assertion |
Pinout & Package
Package: 4-pin SOT23 (U4+1), 1.3mm × 2.9mm footprint, RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal circuitry and MR pullup; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to target logic supply (≤6V); asserts reset to μP during brownout |
| MR (Pin 3) | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ; debounced by design - no external RC needed |
| VCC (Pin 4) | 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 reset threshold | 4.39V with ±3.5% tolerance over full temperature range - eliminates calibration and reduces BOM count |
| Guaranteed 140ms minimum reset timeout | Ensures μP completes power-up sequencing before release - prevents premature code execution |
| Open-drain RESET with 6V absolute max rating | Enables level-shifting: e.g., monitor 3.3V rail while pulling RESET line to 5V logic domain |
| Internal MR pullup resistor | 63kΩ value allows direct switch-to-GND interface - removes external component and layout area |
| Immunity to short VCC transients | Rejects glitches ≤100ns duration - avoids spurious resets in electrically noisy environments |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Power monitoring during cold-cranking or load-dump events where battery voltage dips transiently below nominal. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset to MCU until stable 5V rail is restored after voltage sag. Use Value: Prevents MCU lockup or corrupted EEPROM writes during unstable supply conditions. | Use Scenario: Reset coordination between 3.3V microcontroller and 5V CAN transceiver in distributed vehicle networks. IC Role / Device Role / Timing Role: Open-drain RESET output pulled to 5V, ensuring simultaneous reset assertion across dual-voltage subsystems. Use Value: Eliminates timing skew between logic and interface ICs during power-up, improving bus arbitration reliability. |
| Portable Medical Sensors | Smart Energy Meters |
Use Scenario: Long-term operation from CR2032 coin cell with gradual voltage decay over years. IC Role / Device Role / Timing Role: Monitors VCC down to 1.0V and asserts reset before MCU enters undefined state. Use Value: Maintains data integrity during end-of-life battery discharge by triggering controlled shutdown sequence. | Use Scenario: Meter firmware upgrade requiring deterministic reset behavior after power interruption. IC Role / Device Role / Timing Role: Provides 140ms minimum reset hold time to guarantee bootloader readiness before application code execution. Use Value: Reduces field failure rate from incomplete firmware updates due to insufficient reset duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US44D3-T | Bidirectional reset pin support; otherwise identical threshold and timeout | Required for μCs with shared reset/input pins needing internal pullup control | Select only if target microcontroller uses bidirectional reset I/O |
| TPS3808G33DBVR | 3.3V fixed threshold; 200ms min timeout; higher 12μA ICC; same SOT23-4 package | Not suitable for 4.39V monitoring; better for 3.3V-only systems with longer timeout requirement | Choose when precise 3.3V threshold and longer reset hold are prioritized over ultra-low ICC |
Compared with MAX6314US44D3-T, the MAX6315US44D3-T lacks bidirectional reset support but offers lower 5μA supply current and simpler interface; versus TPS3808G33DBVR, it delivers tighter 4.39V threshold accuracy and 40% lower quiescent current, making it preferable for battery-constrained 4.5V systems.
Availability
MAX6315US44D3-T is available at Aetrix Electronics and suitable for industrial controllers, automotive body electronics, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long product 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 robust, low-power voltage monitoring and reset generation in space-constrained, thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage for MAX6315US44D3-T?
The MAX6315US44D3-T has a factory-trimmed nominal reset threshold 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 specified in the Ordering Information table of the official datasheet. The MAX6315US44D3-T does not support user adjustment - the threshold is fixed and guaranteed per unit.
What is the minimum reset timeout period for MAX6315US44D3-T?
The MAX6315US44D3-T provides a minimum reset timeout period of 140ms after VCC rises above the 4.39V threshold or after the manual reset (MR) signal is deasserted. This value is guaranteed over temperature and voltage, with typical values reaching 200ms at +25°C and up to 280ms at +125°C, as confirmed in the Electrical Characteristics table.
Can MAX6315US44D3-T's RESET output be pulled up to a voltage higher than its VCC supply?
Yes, the MAX6315US44D3-T's RESET pin is an open-drain output rated for up to 6.0V, allowing it to be pulled up to any voltage between 0V and 6V - including levels exceeding the device's own VCC. This enables level-shifting functionality, such as monitoring a 3.3V rail while asserting reset to a 5V logic domain, a capability explicitly documented in the Pin Description and Typical Operating Circuit sections.
Does MAX6315US44D3-T require an external pullup resistor on the MR pin?
No, the MAX6315US44D3-T includes an internal 63kΩ pullup resistor on the MR pin, so no external component is required. When unused, MR may be left floating; for manual reset functionality, connect a normally open momentary switch directly between MR and GND. External debounce circuitry is unnecessary due to built-in glitch rejection of 100ns pulses.
What is the maximum operating supply voltage for MAX6315US44D3-T?
The MAX6315US44D3-T supports an operating VCC range of 1.0V to 5.5V, with absolute maximum rating of +6.0V on VCC and RESET pins. Operation at 5.5V is fully characterized across temperature, and the device maintains valid reset assertion down to 1.0V - critical for detecting end-of-life battery conditions in portable equipment.
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:
- 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:
- 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?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US44D3-T transactions.
Note: Certain payment methods may incur a processing fee.
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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