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Analog Devices Inc./Maxim Integrated MAX6315US30D3+T
- Part No.:
- MAX6315US30D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US30D3+T.pdf
- Description:
- IC RESET CIRCUIT 3.00V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,454
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Product details
Overview
MAX6315US30D3+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 3.00V or upon manual reset assertion. It features factory-trimmed 3.00V reset threshold, 140ms minimum reset timeout period (–40°C to +125°C), 5μA typical supply current at 5.5V, and operates across –40°C to +125°C. It is used in battery-powered controllers and embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6315US30D3+T datasheet, MAX6315US30D3+T pinout, MAX6315US30D3+T application, or MAX6315US30D3+T equivalent, key selection criteria include its precise 3.00V reset threshold tolerance (±3.5% over temperature), open-drain output capable of pull-up to 6V, immunity to sub-100ns MR glitches, guaranteed operation down to VCC = 1.0V, and SOT23-4 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6315US30D3+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set the 3.00V nominal reset threshold, with ±3.5% accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 140ms (min) reset timeout after VCC recovery or MR deassertion.
It uses an open-drain n-channel MOSFET for RESET output, enabling level-shifting up to 6V independent of VCC, and integrates a 63kΩ internal MR pullup resistor. The device rejects transients <100ns on MR and suppresses VCC glitches as short as 35μs during falling edge transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V nominal, ±3.5% over –40°C to +125°C - ensures reliable detection of 3.3V rail brownout before system instability. |
| Reset Timeout Period | 140ms minimum (–40°C to +125°C) - guarantees sufficient hold time for μP initialization and peripheral stabilization. |
| Supply Current | 5μA typical at VCC = 5.5V (–40°C to +85°C) - enables multi-year operation in coin-cell–powered IoT sensors. |
| RESET Output Type | Open-drain, 0.3V max VOL at 1.2mA sink - supports wired-OR reset buses and level-shifted reset signaling to higher-voltage domains. |
| MR Input Logic | Active-low with 0.3×VCC VIH/0.7×VCC VIL thresholds - compatible with 1.8V, 3.3V, and 5V logic families without external level translation. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor edge-node deployments. |
| VCC Range | 1.0V to 5.5V - allows monitoring of ultra-low-voltage rails (e.g., 1.2V core supplies) while maintaining reset functionality. |
Pinout & Package
MAX6315US30D3+T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1, outline 21-0052), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for high-density PCBs in portable electronics.
| 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 for noise immunity. |
| 2 (RESET) | Active-low open-drain output | Sinks current during reset; requires external pullup (e.g., 10kΩ) to any supply ≤6V - enables reset assertion across mixed-voltage domains. |
| 3 (MR) | Manual reset input | Active-low with internal 63kΩ pullup; accepts momentary switch to GND or logic-low signal; rejects <100ns noise pulses. |
| 4 (VCC) | Supply and monitored voltage input | Powers device and feeds internal voltage divider; monitors same rail it supplies - no external components needed for basic supervision. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.00V threshold | Eliminates external resistor dividers and calibration - reduces BOM count and layout area in cost-sensitive controllers. |
| 140ms min reset timeout | Guarantees μP reset hold time exceeds boot ROM execution latency in ARM Cortex-M0/M3 and PIC18F devices. |
| Open-drain RESET with 6V tolerance | Permits single reset line to service both 3.3V μP and 5V FPGA configuration logic - avoids dual-supply reset ICs. |
| 5μA supply current | Enables always-on supervision in energy-harvesting nodes where average current budget is <10μA. |
| –40°C to +125°C operation | Supports deployment in engine control units and solar inverter gate drivers without derating or thermal margin loss. |
Applications
| Industrial Motor Drives | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Monitoring 3.3V auxiliary supply powering gate driver ICs and isolated ADCs in variable-frequency drives. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET during DC bus sag or cooling-fan failure-induced voltage droop. Use Value: Prevents erratic PWM output and IGBT shoot-through by holding MCU in reset until stable 3.3V rail is restored for ≥140ms. |
Use Scenario: Long-term environmental monitoring using CR2032 coin cell powering MSP430FR59xx MCU and analog sensor front-end. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor ensuring valid reset during cold-start and end-of-life battery voltage decay. Use Value: 5μA ICC extends battery life beyond 5 years; 3.00V threshold triggers reset before brownout corrupts FRAM write operations. |
| Automotive Body Control Modules | Medical Infusion Pumps |
|
Use Scenario: Supervising 5V system rail in BCMs exposed to load-dump and cold-crank transients per ISO 7637-2. IC Role / Device Role / Timing Role: Reset generator immune to 100ns MR glitches and short VCC dips during alternator switching events. Use Value: Maintains deterministic reset behavior despite 12V battery fluctuations - critical for ASIL-B functional safety compliance. |
Use Scenario: Ensuring safe startup and fault recovery in Class II medical devices powered from rechargeable Li-ion packs. IC Role / Device Role / Timing Role: Fail-safe reset source for ARM-based pump controller, asserting RESET if pack voltage drops below 3.00V during delivery. Use Value: 140ms timeout prevents premature motor activation during transient undervoltage; open-drain output interfaces cleanly with isolated reset isolators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US30D2+T | Same 3.00V threshold but 20ms min reset timeout (vs. 140ms) | Suitable for faster-boot MCUs (e.g., STM32L0) where shorter reset hold suffices | Select when system boot completes in <20ms and tighter timing margin is acceptable |
| TPS3808G30DBVR | 3.0V threshold, 200ms min timeout, 1.4μA ICC, SOT23-5 package | Requires 5th pin for VDD bypass; lower ICC but larger footprint and different pinout | Choose for ultra-low-power designs needing <2μA ICC, accepting SOT23-5 layout change |
Compared with MAX6315US30D2+T, the MAX6315US30D3+T provides 7× longer reset hold time for robust initialization of complex peripherals; versus TPS3808G30DBVR, it offers pin-compatible SOT23-4 replacement with higher ICC but simplified board layout and no bypass capacitor requirement.
Availability
MAX6315US30D3+T is available at Aetrix Electronics and suitable for industrial motor drives, battery-powered data loggers, automotive body control modules, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US30D3+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 since 1965.
The MAX6315 series was designed specifically for cost-sensitive, space-constrained microprocessor supervision in harsh environments - delivering precision voltage monitoring, glitch-immune reset timing, and wide-temperature reliability without external components.
FAQ
What is the exact reset threshold voltage of the MAX6315US30D3+T?
The MAX6315US30D3+T has a factory-trimmed nominal reset threshold of 3.00V, with tolerance of ±3.5% over the full –40°C to +125°C operating range. At +25°C, the threshold is specified as ±1.8%, and the tempco is 60ppm/°C - ensuring predictable brownout detection across automotive and industrial thermal profiles. This value is laser-trimmed and verified per unit during production.
Does the MAX6315US30D3+T require an external pullup resistor on the RESET pin?
Yes, the MAX6315US30D3+T features an open-drain RESET output and requires an external pullup resistor. A 10kΩ resistor to any supply between 0V and 6V is recommended for most applications. The device's RESET pin can be pulled up to a voltage higher than VCC - enabling level-shifted reset signaling - and sinks up to 1.2mA while maintaining ≤0.3V VOL.
What is the minimum reset timeout period for the MAX6315US30D3+T over temperature?
The MAX6315US30D3+T guarantees a minimum reset timeout period of 140ms over the full –40°C to +125°C temperature range. At +25°C, the typical timeout is 200ms, with maximum 280ms. This ensures sufficient hold time for microcontrollers with slow clock startup or external memory initialization sequences, even under worst-case thermal conditions.
Can the MAX6315US30D3+T monitor supply voltages below 3.00V?
No - the MAX6315US30D3+T is factory-configured exclusively for a 3.00V reset threshold and cannot be adjusted. However, it remains functional down to VCC = 1.0V, meaning it will assert RESET as long as the monitored rail stays above 1.0V but below 3.00V. For lower thresholds (e.g., 2.63V), select MAX6315US26D3+T instead.
Is the MAX6315US30D3+T pin-compatible with the MAX811?
Yes, the MAX6315US30D3+T is explicitly stated as pin-compatible with the MAX811 in its Benefits and Features section. Both devices use identical SOT23-4 pinout (VCC, MR, RESET, GND) and share compatible electrical characteristics including open-drain RESET, manual reset input with internal pullup, and similar supply current - enabling drop-in replacement in legacy designs.
MAX6315US30D3+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:
- 3V
- 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
MAX6315US30D3+T FAQ
1.How can I place an order for MAX6315US30D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US30D3+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 MAX6315US30D3+T reliable?
The price and inventory of MAX6315US30D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US30D3+T is usually 5 days.
3.What payment methods are accepted for MAX6315US30D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US30D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US30D3+T?
MAX6315US30D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US30D3+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 MAX6315US30D3+T?
For technical support, including MAX6315US30D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US30D3+T requirements.
6.How does Aetrix verify that MAX6315US30D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US30D3+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 MAX6315US30D3+T meets industry standards.
7.What is the process for return or replacement of MAX6315US30D3+T?
All MAX6315US30D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US30D3+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 MAX6315US30D3+T part is unused and in its original packaging.
Return procedure for MAX6315US30D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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