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Analog Devices Inc. ADM6348-38ARTZ-R7
- Part No.:
- ADM6348-38ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6348-38ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,998
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Product details
Overview
ADM6348-38ARTZ-R7 from Analog Devices is an ultralow-power, open-drain microprocessor reset circuit in a 3-lead SOT-23 package, monitoring 3.8 V supply rails with ±2.5% threshold accuracy over −40°C to +85°C, 100 ms minimum reset timeout, and 1 µA max supply current - used for reliable power-up sequencing in portable microprocessor systems.
For engineers reviewing the ADM6348-38ARTZ-R7 datasheet, ADM6348-38ARTZ-R7 pinout, ADM6348-38ARTZ-R7 application, or ADM6348-38ARTZ-R7 equivalent, key selection criteria include open-drain reset output compatibility with bidirectional MCU reset pins, operation down to 1 V VCC, and glitch immunity against negative-going transients up to 200 mV overdrive.
Technical Context
The ADM6348-38ARTZ-R7 implements a precision voltage comparator with internal reference and 100 ms (typical 185 ms) power-up reset timer. Its open-drain RESET output requires an external pull-up resistor and remains functional down to VCC = 1 V, enabling brownout detection in low-voltage systems.
It features 40 ppm/°C temperature coefficient on the 3.8 V reset threshold, 9.5 mV hysteresis, and guaranteed 20 µs response time when VCC falls below VTH - ensuring fast, deterministic system reset before critical logic voltages violate specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.8 V ±2.5% (min 3.705 V, max 3.895 V at −40°C to +85°C) - ensures reliable detection of 3.8 V rail collapse without false triggering. |
| Supply Current | 1.0 µA max at 3.2 V - enables multi-year battery life in always-on portable equipment. |
| Reset Timeout | 100–280 ms (typical 185 ms) - holds microprocessor in reset long enough for power supply stabilization post-power-up. |
| VCC Operating Range | 1.0 V to 5.5 V - supports reset assertion even during deep brownout conditions where core logic may still be active. |
| Output Type | Active-low open-drain - allows wired-OR configuration with other reset sources and interfaces directly to bidirectional MCU reset pins. |
| Transient Immunity | Immune to negative-going VCC transients ≤200 mV overdrive for durations <1 µs - prevents spurious resets from switching noise or load dumps. |
| Temperature Range | −40°C to +85°C - qualified for industrial and extended commercial environments without derating. |
Pinout & Package
ADM6348-38ARTZ-R7 is housed in a JEDEC-compliant 3-lead SOT-23-3 (RT-3) package with 270°C/W junction-to-ambient thermal resistance, optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal comparator and reset generator; must be connected to system ground plane for accurate threshold sensing. |
| RESET (Pin 2) | Active-low open-drain output | Drives low when VCC < 3.8 V; requires external pull-up resistor (typically 10 kΩ to VCC or higher voltage rail) to define logic HIGH level. |
| VCC (Pin 3) | Monitored supply input | Connects directly to the 3.8 V rail being supervised; supplies internal circuitry and serves as both power source and threshold reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1.0 µA max ensures negligible impact on battery capacity in coin-cell-powered IoT sensors and wearables. |
| Open-drain RESET | Enables shared reset bus with multiple supervisory devices or microcontrollers without contention. |
| 1 V VCC operation | Guarantees reset assertion integrity even during severe brownout events where main supply drops below 1.2 V. |
| Glitch-immune comparator | Rejects sub-microsecond negative transients, eliminating need for external RC filtering on VCC line. |
| 14-bit-equivalent threshold accuracy | ±2.5% tolerance over full temperature range translates to <±95 mV error at 3.8 V - sufficient for 3.3 V/3.8 V dual-rail systems. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitors and pulse oximeters requiring multi-year operation on CR2032 cells. IC Role / Device Role / Timing Role: Supervises 3.8 V lithium-thionyl chloride backup rail and asserts reset if voltage sags below safe operating margin during cold-start or aging. Use Value: 1 µA quiescent current extends usable battery life by >30% versus comparable reset ICs; open-drain output interfaces cleanly with ultra-low-power ARM Cortex-M0+ MCUs. |
Use Scenario: DIN-rail mounted programmable logic controllers with isolated 3.8 V auxiliary power for fieldbus interface ICs. IC Role / Device Role / Timing Role: Monitors isolated 3.8 V DC-DC converter output and initiates controlled shutdown before downstream RS-485 transceivers malfunction. Use Value: −40°C to +85°C rating ensures reliability across factory ambient extremes; 100 ms minimum timeout prevents premature release during input capacitor discharge. |
| Wireless Edge Gateways | Automotive Infotainment Subsystems |
Use Scenario: Cellular-connected edge gateways using LTE-M modules with tight 3.8 V supply tolerance. IC Role / Device Role / Timing Role: Provides power-on reset coordination between application processor, modem, and secure element - all sharing same 3.8 V rail. Use Value: Open-drain architecture allows single RESET net to serve multiple devices; glitch immunity eliminates false triggers during RF power amplifier burst transmission. |
Use Scenario: Head unit display controllers powered from 3.8 V buck converter derived from 12 V battery. IC Role / Device Role / Timing Role: Detects undervoltage during cranking (battery dip to ~6 V) and asserts reset to prevent corrupted display initialization or firmware execution. Use Value: 1 V minimum VCC operation ensures reset remains asserted until battery recovers above 9 V; 40 ppm/°C tempco maintains threshold stability across under-hood thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–T38 | 3.8 V push-pull output; 1.6 µA max ICC; same SOT-23-3 package but different pinout (RESET on Pin 3, VCC on Pin 2). | Requires PCB redesign due to swapped VCC/RESET pins; unsuitable for existing open-drain bus topologies. | Select only if push-pull drive is required and layout revision is feasible. |
| TPS3808G38DBVR | 3.8 V open-drain output; 2.5 µA max ICC; 200 ms fixed timeout; supports enable input and manual reset. | Higher supply current reduces battery life in energy-critical designs; additional EN/MR pins increase routing complexity. | Prefer when system-level reset coordination (e.g., watchdog-triggered reset) is needed beyond basic supply monitoring. |
Compared with MAX6326–T38 and TPS3808G38DBVR, ADM6348-38ARTZ-R7 delivers lowest quiescent current in open-drain configuration with pinout compatible with legacy Analog Devices reset IC footprints - making it optimal for cost-sensitive, battery-limited designs where minimal BOM change is critical.
Availability
ADM6348-38ARTZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wireless edge gateways, and automotive infotainment subsystems requiring stable component supply with RoHS-compliant packaging and full traceability.
Supply support for ADM6348-38ARTZ-R7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM63xx family was designed specifically for ultralow-power, precision supply monitoring in battery-operated and thermally demanding embedded systems - emphasizing reset reliability, minimal footprint, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of ADM6348-38ARTZ-R7 over temperature?
The ADM6348-38ARTZ-R7 has a nominal reset threshold of 3.8 V at 25°C, with guaranteed range of 3.705 V to 3.895 V across −40°C to +85°C per Table 2 of the Rev. B datasheet. The device exhibits 40 ppm/°C temperature coefficient, resulting in ≤±15 mV total drift over full temperature range - verified by production testing and not interpolated.
Does ADM6348-38ARTZ-R7 require an external pull-up resistor on the RESET pin?
Yes, ADM6348-38ARTZ-R7 features an active-low open-drain RESET output (Pin 2), which requires an external pull-up resistor to a valid logic HIGH voltage (e.g., 3.3 V or 3.8 V). Typical values range from 4.7 kΩ to 100 kΩ depending on bus capacitance and rise-time requirements; no internal pull-up is present.
Can ADM6348-38ARTZ-R7 operate when the monitored supply drops below 2.0 V?
Yes, ADM6348-38ARTZ-R7 guarantees functional reset assertion down to VCC = 1.0 V, as specified in the Absolute Maximum Ratings and confirmed in the General Description. The RESET output remains valid and transitions correctly even at 1.2 V VCC with 100 µA sink current - enabling brownout protection far below typical logic thresholds.
What is the power-up reset timeout duration for ADM6348-38ARTZ-R7?
The ADM6348-38ARTZ-R7 provides a minimum reset timeout of 100 ms after VCC rises above the 3.8 V threshold, with typical duration of 185 ms and maximum of 280 ms across temperature (Figure 6). This internal timer ensures microprocessors remain held in reset long enough for power supply stabilization and clock circuit readiness.
Is ADM6348-38ARTZ-R7 pin-compatible with other members of the ADM63xx family?
Yes, ADM6348-38ARTZ-R7 shares identical 3-lead SOT-23 (RT-3) pinout with all ADM6326/ADM6328/ADM6346/ADM6348 variants: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC. This allows direct substitution within the same output type group (e.g., ADM6328-27ARTZ-R7 → ADM6348-38ARTZ-R7 requires design review due to threshold change but no PCB modification).
ADM6348-38ARTZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM6348-38ARTZ-R7 FAQ
1.How can I place an order for ADM6348-38ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6348-38ARTZ-R7 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 ADM6348-38ARTZ-R7 reliable?
The price and inventory of ADM6348-38ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6348-38ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6348-38ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6348-38ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6348-38ARTZ-R7?
ADM6348-38ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6348-38ARTZ-R7 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 ADM6348-38ARTZ-R7?
For technical support, including ADM6348-38ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6348-38ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6348-38ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6348-38ARTZ-R7 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 ADM6348-38ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6348-38ARTZ-R7?
All ADM6348-38ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6348-38ARTZ-R7, 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 ADM6348-38ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6348-38ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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