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Analog Devices Inc. ADM6315-44D2ARTRL7
- Part No.:
- ADM6315-44D2ARTRL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM6315-44D2ARTRL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,422
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Product details
Overview
ADM6315-44D2ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit designed to monitor 4.39 V supply rails with ±2.5% threshold accuracy over −40°C to +85°C, assert reset for ≥20 ms after power-up or brownout, and support manual reset via debounced MR input. It operates down to VCC > 1 V and consumes only 5 μA typical supply current, enabling reliable power sequencing in automotive safety systems and portable instrumentation.
For engineers reviewing the ADM6315-44D2ARTRL7 datasheet, ADM6315-44D2ARTRL7 pinout, ADM6315-44D2ARTRL7 application, or ADM6315-44D2ARTRL7 equivalent, key selection criteria include its 4.39 V trip point, 20 ms minimum reset timeout, SOT-143 package footprint, open-drain RESET output compatibility with higher-voltage logic, and guaranteed glitch immunity against <100 ns transients on MR.
Technical Context
The ADM6315-44D2ARTRL7 implements a precision bandgap-based voltage reference comparator with temperature-compensated hysteresis (±2.5% over −40°C to +85°C) and internal timing capacitor for fixed 20 ms reset assertion. Its open-drain RESET output supports pull-up to voltages exceeding VCC, enabling interoperability with 3.3 V, 5 V, or mixed-voltage host systems.
It integrates a debounced manual reset input (MR) with 1 μs minimum pulse width acceptance and 100 ns transient rejection, plus brownout detection that triggers reset within 35 μs when VCC falls at 1 mV/μs - ensuring synchronized system reset before any downstream IC drops below its operational voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.39 V ±2.5% (−40°C to +85°C); ensures reliable detection of 4.39 V rail degradation before microprocessor malfunction. |
| Reset Timeout | 20 ms minimum (ADM6315xxD2 variant); guarantees sufficient hold time for power supply stabilization and CPU initialization. |
| Supply Current | 5 μA typical at 3.6 V; enables ultra-low-power operation in battery-backed or energy-constrained embedded systems. |
| VCC Operating Range | 1 V to 5.5 V; allows reset assertion even during deep brownout conditions where core logic may still be functional. |
| MR Input Threshold | 0.3 × VCC (VIL) / 0.7 × VCC (VIH) when VTH < 4 V; provides robust noise margin for switch or digital interface control. |
| RESET Output Type | Open-drain; permits flexible pull-up to external voltage rails up to 6 V, supporting mixed-voltage system interfacing. |
| Temperature Range | −40°C to +125°C operating; qualified for under-hood automotive and industrial environments requiring extended thermal reliability. |
Pinout & Package
ADM6315-44D2ARTRL7 is housed in a 4-lead SOT-143 package (RA-4), measuring 2.9 mm × 1.6 mm × 1.15 mm, with gull-wing leads optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | 0 V return path for all internal comparators and logic; must be connected directly to system ground plane for stable threshold accuracy. |
| 2 (RESET) | Active-Low Open-Drain Output | Sinks current when asserted; requires external pull-up resistor to define logic-high level and voltage domain compatibility. |
| 3 (MR) | Debounced Manual Reset Input | Active-low; accepts ≥1 μs pulses and rejects <100 ns glitches; floats high when unused due to internal 32–100 kΩ pull-up. |
| 4 (VCC) | Monitored Supply Input | Primary power rail input; internally sampled by precision comparator; also powers internal circuitry and defines MR logic thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Precision Voltage Monitoring | 4.39 V trip point with ±2.5% tolerance over −40°C to +85°C ensures deterministic reset behavior across automotive temperature ranges. |
| Fixed 20 ms Reset Timeout | Guaranteed minimum assertion period eliminates need for external RC timing components and simplifies BOM management. |
| Open-Drain RESET Output | Enables direct interface to 3.3 V, 5 V, or 12 V logic families without level-shifting circuitry or voltage translation ICs. |
| Debounced MR Input | Integrated 100 ns glitch filter and 1 μs pulse acceptance allow direct connection to mechanical switches or noisy digital signals without external RC filtering. |
| Ultra-Low Quiescent Current | 5 μA typical supply current extends battery life in portable instruments and reduces self-heating in thermally constrained enclosures. |
Applications
| Automotive Safety Systems | Portable Medical Instruments |
|---|---|
|
Use Scenario: Monitoring 4.39 V power rail supplying airbag controller MCU during vehicle cranking, where battery voltage dips to 6–9 V and generates transient noise. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt MCU execution until regulated 4.39 V rail stabilizes post-cranking. Use Value: Prevents erratic MCU behavior during brownout by guaranteeing ≥20 ms reset hold time and rejecting sub-100 ns EMI spikes on MR line. |
Use Scenario: Power-on reset sequencing for a handheld glucose meter using a 4.39 V LDO output to supply its ADC and display driver. IC Role / Device Role / Timing Role: Voltage supervisor initiating controlled boot sequence only after 4.39 V rail reaches regulation and remains stable for ≥20 ms. Use Value: Eliminates need for discrete RC reset circuit while maintaining 5 μA quiescent current to maximize battery runtime between calibrations. |
| Industrial PLC I/O Modules | Avionics Data Acquisition Units |
|
Use Scenario: Ensuring deterministic startup of isolated CAN transceivers and FPGA configuration logic powered from a 4.39 V auxiliary rail in factory-floor controllers. IC Role / Device Role / Timing Role: Reset generator providing synchronized deassertion signal to multiple downstream devices after power stabilization. Use Value: Open-drain RESET output pulled to 5 V enables clean interface with both 3.3 V FPGA I/O and 5 V CAN PHY without level shifters. |
Use Scenario: Brownout protection for flight data recorder memory subsystem during aircraft electrical load shedding events. IC Role / Device Role / Timing Role: Fast 35 μs response to VCC droop prevents partial writes to nonvolatile memory during voltage collapse. Use Value: ±2.5% threshold accuracy over −40°C to +125°C ensures consistent trip point across cabin temperature extremes and altitude-induced thermal gradients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US44D2+T | 4.40 V threshold (±2.0%), 20 ms timeout, SOT-23-4 package; higher accuracy but 10× higher quiescent current (50 μA). | Preferred where tighter threshold tolerance is critical and board space permits larger SOT-23 footprint. | Select MAX6315US44D2+T if ±2.0% threshold stability outweighs 45 μA additional supply current and SOT-23 layout impact. |
| TPS3808G33DBVR | 3.3 V fixed threshold, 20 ms timeout, SOT-23-5; includes watchdog timer and enable input not present in ADM6315-44D2ARTRL7. | Suitable for systems requiring dual supervision (power + software watchdog) but incompatible for 4.39 V rail monitoring. | Choose TPS3808G33DBVR only if redesigning for 3.3 V rail and adding watchdog functionality; not a drop-in replacement. |
Compared with MAX6315US44D2+T and TPS3808G33DBVR, ADM6315-44D2ARTRL7 delivers optimal balance of 4.39 V precision, ultra-low 5 μA supply current, and compact SOT-143 footprint - making it uniquely suited for space- and power-constrained 4.39 V rail supervision without added features.
Availability
ADM6315-44D2ARTRL7 is available at Aetrix Electronics and suitable for automotive safety systems, portable medical instruments, industrial PLC I/O modules, and avionics data acquisition units requiring stable component supply with full RoHS compliance and traceable sourcing.
Supply support for ADM6315-44D2ARTRL7 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 ADM6315 family was engineered specifically for cost-sensitive, space-constrained microprocessor supervision tasks requiring precise voltage thresholds, low power, and robust transient immunity - targeting automotive, portable, and industrial embedded applications.
FAQ
What is the exact reset threshold voltage of ADM6315-44D2ARTRL7 and how does it vary with temperature?
The ADM6315-44D2ARTRL7 has a nominal reset threshold of 4.39 V, with tolerance of ±2.5% over −40°C to +85°C and ±3.5% over −40°C to +125°C. This variation is specified in the datasheet's "RESET VOLTAGE THRESHOLD" table and reflects calibrated bandgap reference drift across temperature. The device uses internal compensation to maintain stability, and no external calibration is required for standard operation of ADM6315-44D2ARTRL7.
Does ADM6315-44D2ARTRL7 require an external pull-up resistor on the RESET pin, and what value is recommended?
Yes, ADM6315-44D2ARTRL7 features an open-drain RESET output and requires an external pull-up resistor to define the logic-high voltage level. A 10 kΩ resistor to the target logic rail (e.g., 3.3 V or 5 V) is commonly used and ensures adequate rise time while limiting sink current to ≤3.2 mA per the datasheet's "Output Voltage" specification. The exact value depends on bus capacitance and speed requirements, but ADM6315-44D2ARTRL7 functions reliably across 4.7 kΩ to 100 kΩ.
Can ADM6315-44D2ARTRL7 monitor a 4.39 V supply while being powered from a different voltage rail?
No - ADM6315-44D2ARTRL7 monitors only the voltage applied to its VCC pin and derives its internal reference and logic thresholds from that same rail. It cannot supervise an independent 4.39 V source unless that source is connected directly to the VCC terminal. The device does not support separate supply and sense inputs; therefore, ADM6315-44D2ARTRL7 must be powered from the 4.39 V rail it is intended to monitor.
What is the minimum pulse width required on the MR pin to trigger a manual reset on ADM6315-44D2ARTRL7?
The MR input of ADM6315-44D2ARTRL7 requires a minimum low-going pulse width of 1 μs to guarantee recognition, as specified in the "Manual Reset" section of the datasheet. Pulses shorter than 100 ns are rejected as glitches. For robust operation in noisy environments, a 1 μF decoupling capacitor between MR and GND is recommended - this ensures reliable manual reset activation while maintaining immunity to EMI, as confirmed in the ADM6315-44D2ARTRL7 functional description.
Is ADM6315-44D2ARTRL7 pin-compatible with the ADM811, and what are the implications for board reuse?
Yes, ADM6315-44D2ARTRL7 is explicitly stated as pin-compatible with the ADM811 in the datasheet's FEATURES section. Both use identical 4-lead SOT-143 pinout (GND, RESET, MR, VCC), enabling direct PCB-level replacement without layout changes. However, ADM6315-44D2ARTRL7 offers improved temperature range (−40°C to +125°C vs. −40°C to +85°C for ADM811) and tighter threshold accuracy, so ADM6315-44D2ARTRL7 can upgrade existing ADM811 designs without hardware modification.
ADM6315-44D2ARTRL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- 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
ADM6315-44D2ARTRL7 FAQ
1.How can I place an order for ADM6315-44D2ARTRL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6315-44D2ARTRL7 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 ADM6315-44D2ARTRL7 reliable?
The price and inventory of ADM6315-44D2ARTRL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6315-44D2ARTRL7 is usually 5 days.
3.What payment methods are accepted for ADM6315-44D2ARTRL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6315-44D2ARTRL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6315-44D2ARTRL7?
ADM6315-44D2ARTRL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6315-44D2ARTRL7 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 ADM6315-44D2ARTRL7?
For technical support, including ADM6315-44D2ARTRL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6315-44D2ARTRL7 requirements.
6.How does Aetrix verify that ADM6315-44D2ARTRL7 is sourced from the original manufacturer or authorized distributors?
All ADM6315-44D2ARTRL7 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 ADM6315-44D2ARTRL7 meets industry standards.
7.What is the process for return or replacement of ADM6315-44D2ARTRL7?
All ADM6315-44D2ARTRL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6315-44D2ARTRL7, 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 ADM6315-44D2ARTRL7 part is unused and in its original packaging.
Return procedure for ADM6315-44D2ARTRL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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