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Analog Devices Inc. ADM6328-28ARTZ-R7
- Part No.:
- ADM6328-28ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6328-28ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,325
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Product details
Overview
ADM6328-28ARTZ-R7 from Analog Devices is an ultralow-power, open-drain microprocessor reset circuit in a 3-lead SOT-23 package, monitoring VCC at a precise 2.8 V threshold (±2.5% over −40°C to +85°C), with 1 µA max supply current and 100 ms minimum reset timeout-used for reliable power-up sequencing in portable microprocessor systems.
For engineers reviewing the ADM6328-28ARTZ-R7 datasheet, ADM6328-28ARTZ-R7 pinout, ADM6328-28ARTZ-R7 application, or ADM6328-28ARTZ-R7 equivalent, key selection criteria include open-drain output compatibility with bidirectional MCU reset pins, operation down to 1 V VCC, glitch immunity against negative transients, and SOT-23 footprint constraints in space-constrained designs.
Technical Context
The ADM6328-28ARTZ-R7 integrates a precision voltage reference, comparator with hysteresis (6.3 mV), and a 100–280 ms internal reset timeout timer. Its open-drain RESET output requires an external pull-up resistor and remains functional down to VCC = 1 V, enabling brownout detection even during deep undervoltage conditions.
It delivers glitch immunity against fast negative-going VCC transients up to 200 µs duration when overdriven by ≥20 mV below threshold, and exhibits ±1.5% threshold accuracy at 25°C with 40 ppm/°C temperature coefficient-ensuring stable reset assertion across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.8 V nominal (2.73 V to 2.87 V over −40°C to +85°C); ensures reliable reset assertion before downstream logic violates min VCC spec. |
| Supply Current | ≤1.0 µA at 3 V; enables multi-year battery life in always-on portable equipment without compromising supervision integrity. |
| Reset Timeout | 100–280 ms (typ. 185 ms); holds MCU in reset long enough for power rails and clocks to stabilize post-power-up. |
| Output Type | Active-low open-drain RESET; supports wired-OR reset buses and bidirectional MCU reset pins with single pull-up. |
| VCC Operating Range | 1.0 V to 5.5 V; allows valid reset signaling during brownout recovery down to 1 V, before most MCUs lose functionality. |
| Hysteresis | 6.3 mV; prevents chatter near threshold during slow VCC ramp-up or noise-induced marginal crossings. |
| Temperature Range | −40°C to +85°C; qualified for industrial and extended-temperature embedded applications without derating. |
Pinout & Package
ADM6328-28ARTZ-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 low-profile 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 low-impedance to avoid threshold shift. |
| RESET (Pin 2) | Active-low open-drain output | Sinks current when asserted; requires external pull-up to system VCC or another rail; compatible with 1.8 V–5 V logic interfaces. |
| VCC (Pin 3) | Monitored supply input | Input voltage source being supervised; also powers internal circuitry; valid operation guaranteed down to 1.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1 µA max supply current enables integration into energy-harvesting and coin-cell-powered systems without measurable battery drain. |
| Open-drain RESET | Supports shared reset bus architectures and bidirectional MCU reset pins-eliminates need for external level-shifting or OR-ing logic. |
| Glitch-immune comparator | Rejects negative VCC transients ≤200 µs duration (at ≥20 mV overdrive), preventing spurious resets during switching noise or load dumps. |
| 1 V minimum VCC operation | Asserts RESET down to 1.0 V VCC, ensuring system reset occurs before core logic enters undefined states during brownout. |
| 100 ms minimum timeout | Guarantees sufficient hold time for PLL lock, memory initialization, and peripheral power-up sequencing before firmware execution begins. |
Applications
| Portable Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
|
Use Scenario: Battery-powered wearable ECG sensor operating on CR2032 cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors main 3.0 V LDO output and asserts open-drain RESET to ARM Cortex-M0+ MCU during brownout or cold start. Use Value: 1 µA quiescent current extends battery life beyond 2 years; 2.8 V threshold aligns with MCU's 2.7 V min VDD specification. |
Use Scenario: Remote vibration monitor deployed in factory machinery with wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervises 3.3 V system rail and triggers hardware reset if rail dips below 2.8 V due to transient load surges or aging PSU. Use Value: −40°C to +85°C rating and 40 ppm/°C tempco ensure consistent reset behavior across operating environment; 6.3 mV hysteresis prevents oscillation during slow rail recovery. |
| POS Terminal Power Sequencing | Smart Home Hub Controller |
|
Use Scenario: Embedded payment terminal with dual-rail power (5 V analog, 3.3 V digital) and strict boot reliability requirements. IC Role / Device Role / Timing Role: Dedicated ADM6328-28ARTZ-R7 supervises 3.3 V digital rail and drives shared reset line tied to MCU, FPGA, and secure element. Use Value: Open-drain output enables safe wired-OR with other supervisors; 185 ms typical timeout exceeds PCIe Gen3 power-good timing requirements. |
Use Scenario: Always-on Wi-Fi hub with Zigbee co-processor, requiring deterministic restart after AC adapter disconnect/reconnect cycles. IC Role / Device Role / Timing Role: Resets main application SoC when 3.3 V rail collapses below 2.8 V during brief AC dropout, then holds reset for ≥100 ms upon recovery. Use Value: Valid operation down to 1.0 V VCC ensures reset assertion continues through full rail collapse-no missed events during sub-2 V transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326LT28D3+T | 2.8 V threshold, push-pull output, 1.2 µA ICC, same SOT-23-3 package | Requires dedicated reset net; incompatible with wired-OR or bidirectional MCU pins | Select when board layout lacks space for pull-up resistor or system uses only single-device reset assertion. |
| TPS3808G33DBVR | 3.3 V threshold, open-drain, 1.1 µA ICC, 200 ms timeout, SOT-23-6 package | Higher threshold; larger footprint; includes manual reset input and watchdog timer | Select when 3.3 V rail supervision is required and design benefits from watchdog or external reset control. |
Compared with MAX6326LT28D3+T and TPS3808G33DBVR, ADM6328-28ARTZ-R7 uniquely balances 2.8 V precision, open-drain flexibility, and ultra-low ICC in a minimal 3-pin footprint-making it optimal for cost- and space-sensitive 3.3 V microprocessor systems where reset bus sharing is needed.
Availability
ADM6328-28ARTZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, POS terminal power sequencing, and smart home hub controllers requiring stable component supply with RoHS-compliant packaging and full traceability.
Supply support for ADM6328-28ARTZ-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 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 ADM632x series was designed specifically for ultralow-power, precision voltage monitoring in battery-operated and space-constrained microprocessor systems-emphasizing reset reliability, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of ADM6328-28ARTZ-R7, and how does it vary with temperature?
The ADM6328-28ARTZ-R7 has a nominal reset threshold of 2.8 V at 25°C, with guaranteed range of 2.73 V to 2.87 V over −40°C to +85°C. Its temperature coefficient is 40 ppm/°C, resulting in ≤±15 mV total drift across the full industrial range-verified per Table 2 in the Rev. B datasheet.
Does ADM6328-28ARTZ-R7 require an external pull-up resistor, and what value is recommended?
Yes, ADM6328-28ARTZ-R7 features an active-low open-drain RESET output and requires an external pull-up resistor. A 10 kΩ to 100 kΩ resistor to the target logic rail (e.g., 3.3 V or 1.8 V) is typical; value selection balances rise time, power consumption, and noise immunity-per Figure 8 and Theory of Operation section.
Can ADM6328-28ARTZ-R7 operate reliably when the monitored VCC drops below 2.0 V?
Yes, ADM6328-28ARTZ-R7 guarantees valid RESET assertion down to VCC = 1.0 V, as confirmed in the Specifications table (page 3) and General Description. Its internal circuitry remains functional and responsive even during deep brownout, ensuring no missed reset events below 2.0 V.
What is the minimum reset timeout period for ADM6328-28ARTZ-R7, and is it adjustable?
The ADM6328-28ARTZ-R7 provides a fixed internal reset timeout of 100 ms minimum (185 ms typical, 280 ms maximum), as specified in the Timing Characteristics table. This timeout is not user-adjustable-it is implemented via an internal RC timer and requires no external components.
How does ADM6328-28ARTZ-R7 handle fast negative transients on the VCC line?
ADM6328-28ARTZ-R7 incorporates built-in glitch immunity: it ignores negative-going VCC transients ≤200 µs in duration when the overdrive (VTH − VCC) is ≥20 mV, as characterized in Figure 5 and described in the Transient Immunity section-preventing false resets during switching noise or ESD-induced dips.
ADM6328-28ARTZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.8V
- 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
ADM6328-28ARTZ-R7 FAQ
1.How can I place an order for ADM6328-28ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6328-28ARTZ-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 ADM6328-28ARTZ-R7 reliable?
The price and inventory of ADM6328-28ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6328-28ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6328-28ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6328-28ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6328-28ARTZ-R7?
ADM6328-28ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6328-28ARTZ-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 ADM6328-28ARTZ-R7?
For technical support, including ADM6328-28ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6328-28ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6328-28ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6328-28ARTZ-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 ADM6328-28ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6328-28ARTZ-R7?
All ADM6328-28ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6328-28ARTZ-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 ADM6328-28ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6328-28ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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