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Analog Devices Inc. ADM6348-44ARTZ-R7
- Part No.:
- ADM6348-44ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6348-44ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,142
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Product details
Overview
ADM6348-44ARTZ-R7 from Analog Devices is an ultralow-power, open-drain microprocessor reset circuit in a 3-lead SOT-23 package, monitoring 4.38 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/brownout reset assertion in portable microprocessor systems.
For engineers reviewing the ADM6348-44ARTZ-R7 datasheet, ADM6348-44ARTZ-R7 pinout, ADM6348-44ARTZ-R7 application, or ADM6348-44ARTZ-R7 equivalent, key selection criteria include open-drain output compatibility with bidirectional MCU reset pins, guaranteed reset validity down to 1 V VCC, glitch immunity against negative VCC transients, and precise 4.38 V threshold for 4.5 V nominal rail supervision.
Technical Context
The ADM6348-44ARTZ-R7 implements a precision bandgap-based voltage reference and comparator to detect when VCC falls below its 4.38 V threshold, asserting an active-low open-drain RESET signal within 20 µs (typ). Its internal 100–280 ms reset timeout ensures stable system initialization after power-up.
Designed for low-power operation, it draws ≤1 µA at 3 V and remains functional down to 1 V VCC, enabling use in brownout conditions where other supervisors fail. Glitch immunity is achieved via built-in filtering that rejects negative-going VCC transients up to 200 mV overdrive for durations under 1 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V ±2.5% (TA = 25°C); ensures accurate supervision of 4.5 V nominal rails without premature or delayed reset assertion |
| Supply Current | ≤1.0 µA max at 3 V; enables multi-year battery life in portable equipment with no impact on system quiescent power |
| Reset Timeout | 100–280 ms (typ 185 ms); holds microprocessor in reset long enough for power supply stabilization and clock lock |
| Operating Voltage Range | 1.0 V to 5.5 V; guarantees valid reset output even during deep brownout, supporting robust fault recovery |
| Output Type | Active-low open-drain; requires external pull-up but allows wired-OR reset bus sharing with MCUs or other supervisors |
| Temperature Range | −40°C to +85°C; qualified for industrial and extended commercial environments without derating |
| Hysteresis | 9.5 mV; prevents oscillatory reset toggling near threshold during slow VCC ramp-down |
Pinout & Package
ADM6348-44ARTZ-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 reference and comparator; must be connected directly to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks up to 1.6 mA when asserted; requires external pull-up resistor to host VCC or logic rail for proper level translation |
| VCC (Pin 3) | Monitored supply input | Connects directly to the 4.5 V rail being supervised; powers internal circuitry and enables reset assertion down to 1 V |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1 µA max supply current enables integration into always-on battery-backed subsystems without measurable drain |
| Open-drain RESET | Supports shared reset buses and bidirectional MCU reset pins without contention, simplifying system-level reset arbitration |
| Glitch immunity | Rejects negative VCC transients ≤200 mV amplitude and <1 µs duration, preventing spurious resets during switching noise |
| 1 V VCC operation | Asserts valid RESET signal even when monitored rail collapses to 1 V, ensuring deterministic behavior during deep brownout |
| 14-threshold family | Part of ADM6348 series offering 3.3 V–4.63 V thresholds in 0.1 V increments, enabling precise match to target supply rails |
Applications
| Telecommunications Baseband Modules | Industrial PLC I/O Cards |
|---|---|
|
Use Scenario: Power sequencing and brownout detection in LTE/5G baseband processors with 4.5 V analog supply rails. IC Role / Device Role / Timing Role: Supervises 4.5 V LDO output and asserts open-drain RESET to ARM Cortex-A processor upon undervoltage. Use Value: Prevents corrupted register writes during unstable power-up by guaranteeing ≥185 ms reset hold time and rejecting RF-coupled supply glitches. |
Use Scenario: Reliable restart after AC line interruption in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Monitors 4.5 V backup supply feeding FPGA configuration memory and real-time clock. Use Value: Ensures deterministic state recovery by asserting RESET before VCC drops below 4.3 V, avoiding partial configuration loss. |
| Portable Medical Diagnostic Handhelds | Automotive Infotainment Head Units |
|
Use Scenario: Battery-powered ultrasound imaging devices requiring zero-maintenance power integrity across 500+ charge cycles. IC Role / Device Role / Timing Role: Supervises 4.5 V buck converter output powering ADC front-end and DSP core. Use Value: Delivers 1 µA quiescent current and 4.38 V threshold accuracy to extend single-charge runtime while maintaining FDA-grade startup reliability. |
Use Scenario: Cold-cranking resilience in head unit mainboard during engine start (battery dip to 6 V). IC Role / Device Role / Timing Role: Watches 4.5 V PMIC rail supplying SoC and display controller; asserts RESET if rail falls below 4.38 V. Use Value: Guarantees clean boot after cranking-induced brownout by holding reset until rail stabilizes above threshold for ≥100 ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–T438 | 4.38 V threshold, push-pull output, 2.5 µA ICC, same SOT-23-3 package | Requires no external pull-up but cannot share reset bus; incompatible with bidirectional MCU reset pins | Select when board layout lacks space for pull-up resistor or system uses dedicated reset line |
| TPS3808G33 | 3.3 V fixed threshold, open-drain, 1.1 µA ICC, SOT-23-6 package with manual reset input | Lower threshold and extra pin prevent direct replacement; suited for dual-supply systems needing manual override | Choose only if 3.3 V supervision is required and manual reset functionality is needed |
Compared with MAX6326–T438 and TPS3808G33, ADM6348-44ARTZ-R7 uniquely combines 4.38 V precision, open-drain flexibility, and sub-µA power - making it optimal for space- and energy-constrained 4.5 V rail supervision where reset bus sharing is mandatory.
Availability
ADM6348-44ARTZ-R7 is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial control systems, and portable medical diagnostics requiring stable component supply with full RoHS compliance and traceable lot history.
Supply support for ADM6348-44ARTZ-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, with design centers worldwide and a legacy of precision power management innovation.
ADM6348-44ARTZ-R7 belongs to Analog Devices' Single-Supply Microprocessor Supervisors product line, engineered specifically for ultralow-power, high-accuracy voltage monitoring in battery-operated and industrial systems where reliability under brownout and transient conditions is critical.
FAQ
What is the exact reset threshold voltage of ADM6348-44ARTZ-R7 at 25°C?
The ADM6348-44ARTZ-R7 has a nominal reset threshold of 4.38 V at 25°C, with a guaranteed tolerance of ±2.5% (4.27 V to 4.489 V) across the full operating temperature range of −40°C to +85°C, as specified in Table 2 of the Rev. B datasheet.
Does ADM6348-44ARTZ-R7 require an external pull-up resistor on the RESET pin?
Yes, ADM6348-44ARTZ-R7 features an active-low open-drain RESET output (Pin 2), which requires an external pull-up resistor to a logic-compatible voltage rail - typically the same VCC being monitored or a separate 3.3 V/5 V domain - to establish a defined high state when not asserted.
What is the minimum VCC voltage at which ADM6348-44ARTZ-R7 continues to assert a valid RESET signal?
ADM6348-44ARTZ-R7 guarantees valid RESET output operation down to VCC = 1.0 V, meaning it will correctly assert and maintain the active-low reset signal even during severe brownout conditions where the monitored rail collapses well below its 4.38 V threshold.
Can ADM6348-44ARTZ-R7 replace a push-pull reset IC like ADM6346-44ARTZ-R7 in the same PCB layout?
No - ADM6348-44ARTZ-R7 uses an open-drain output while ADM6346-44ARTZ-R7 uses push-pull; replacing one with the other requires adding an external pull-up resistor and verifying bus loading, as the electrical behavior and drive capability differ fundamentally despite identical pinout and threshold.
What is the typical reset timeout duration for ADM6348-44ARTZ-R7 at room temperature?
The typical reset active timeout period for ADM6348-44ARTZ-R7 is 185 ms at 25°C, with a guaranteed minimum of 100 ms and maximum of 280 ms across −40°C to +85°C, providing sufficient hold time for microprocessor power stabilization and clock lock before release.
ADM6348-44ARTZ-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:
- 4.38V
- 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
ADM6348-44ARTZ-R7 FAQ
1.How can I place an order for ADM6348-44ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6348-44ARTZ-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 ADM6348-44ARTZ-R7 reliable?
The price and inventory of ADM6348-44ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6348-44ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6348-44ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6348-44ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6348-44ARTZ-R7?
ADM6348-44ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6348-44ARTZ-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 ADM6348-44ARTZ-R7?
For technical support, including ADM6348-44ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6348-44ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6348-44ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6348-44ARTZ-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 ADM6348-44ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6348-44ARTZ-R7?
All ADM6348-44ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6348-44ARTZ-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 ADM6348-44ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6348-44ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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