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Analog Devices Inc. ADM6346-36ARTZ-R7
- Part No.:
- ADM6346-36ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-36ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
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Product details
Overview
ADM6346-36ARTZ-R7 from Analog Devices is an ultralow-power, active-low push-pull microprocessor reset circuit in a 3-lead SOT-23 package, monitoring 3.6 V supply rails with ±2.5% threshold accuracy over −40°C to +85°C, 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 ADM6346-36ARTZ-R7 datasheet, ADM6346-36ARTZ-R7 pinout, ADM6346-36ARTZ-R7 application, or ADM6346-36ARTZ-R7 equivalent, key selection criteria include reset threshold tolerance, push-pull output drive capability without external pull-up, VCC operation down to 1 V, and glitch immunity against fast negative transients on monitored rails.
Technical Context
The ADM6346-36ARTZ-R7 integrates a precision voltage reference, comparator with hysteresis (9.5 mV), and internal 100 ms–280 ms reset timeout timer. It asserts RESET within 20 µs when VCC drops below 3.6 V ±2.5%, and holds RESET active for ≥100 ms after VCC rises above threshold.
Its push-pull output drives low to ≤0.3 V at 1.6 mA (VCC > 2.1 V) and high to ≥0.8 × VCC, eliminating need for external pull-up resistors-unlike open-drain variants such as ADM6348-36ARTZ-R7. The device operates continuously down to VCC = 1 V while maintaining valid RESET state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.6 V ±2.5% (3.51 V to 3.69 V over full temperature range); ensures accurate brownout detection for 3.3 V–3.6 V logic supplies. |
| Supply Current | ≤1.0 µA at 3.2 V (typical); enables battery-powered operation for years in always-on portable equipment. |
| Reset Timeout | 100–280 ms (min/typ/max); guarantees sufficient hold time for microprocessor core and peripheral stabilization during power-up. |
| Output Type | Active-low push-pull; drives RESET directly to logic low/high without external components-reduces BOM count and layout area. |
| VCC Operating Range | 1.0 V to 5.5 V; maintains functional RESET assertion even during deep brownout, supporting fail-safe system shutdown. |
| Hysteresis | 9.5 mV; prevents oscillation near threshold during slow-rising/falling VCC transitions. |
| Glitch Immunity | Validated against negative-going VCC transients up to 200 mV overdrive; suppresses false resets from switching noise or ESD coupling. |
Pinout & Package
ADM6346-36ARTZ-R7 uses a JEDEC-compliant 3-lead SOT-23-3 (RT-3) package with 2.9 mm × 1.3 mm footprint and 1.0 mm height, optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal reference and comparator; must be connected to system ground plane for stable threshold accuracy. |
| RESET (Pin 2) | Active-low push-pull output | Drives low (≤0.3 V @ 1.6 mA) or high (≥0.8 × VCC) directly-no pull-up required; interfaces natively with CMOS/TTL reset inputs. |
| VCC (Pin 3) | Monitored supply input | Input voltage source being supervised; also powers internal circuitry; valid from 1.0 V to 5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1 µA max ensures <1 µW quiescent power at 1 V-critical for coin-cell or energy-harvesting applications. |
| Push-pull RESET | Eliminates external pull-up resistor, reducing component count, board area, and potential signal integrity issues in high-density designs. |
| 1 V minimum VCC operation | Guarantees RESET remains asserted through deep undervoltage events, enabling controlled system shutdown before logic corruption. |
| 100 ms minimum timeout | Meets JEDEC JESD8-12B requirement for microprocessor reset hold time, ensuring reliable boot initialization across temperature. |
| 9.5 mV hysteresis | Prevents chatter during marginal VCC recovery, avoiding repeated reset assertion that could stall firmware execution. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose monitors and pulse oximeters requiring multi-year shelf life and cold-temperature startup reliability. IC Role / Device Role / Timing Role: Supervises main 3.6 V Li-ion supply rail and triggers hard reset if voltage sags below 3.51 V during RF transmission bursts. Use Value: 1 µA supply current extends battery life beyond 5 years; push-pull output ensures immediate MCU reset without timing uncertainty from RC pull-up networks. |
Use Scenario: DIN-rail mounted programmable logic controllers operating in unregulated factory environments with noisy 24 V DC-to-3.6 V conversion. IC Role / Device Role / Timing Role: Monitors post-regulation 3.6 V rail feeding FPGA configuration memory and real-time clock, asserting RESET within 20 µs of brownout. Use Value: Glitch immunity rejects 100 ns–200 ns transients from relay switching; 100 ms timeout accommodates slow-rising industrial power supplies. |
| Wireless Edge Gateways | Automotive Infotainment Head Units |
|
Use Scenario: Cellular-connected IoT gateways deployed in remote locations with intermittent solar charging and wide ambient temperature swings (−40°C to +85°C). IC Role / Device Role / Timing Role: Provides primary reset supervision for ARM Cortex-A53 SoC powered from a 3.6 V buck converter, holding RESET until all LDOs stabilize. Use Value: ±2.5% threshold accuracy ensures consistent reset behavior across temperature; 1 V operational limit supports graceful shutdown during battery depletion. |
Use Scenario: In-vehicle infotainment systems where 3.6 V domain powers audio codecs and display interface ICs alongside main 5 V rail. IC Role / Device Role / Timing Role: Dedicated supervisor for 3.6 V audio subsystem, isolating its reset timing from main SoC reset to prevent audio artifacts during boot. Use Value: Push-pull output avoids contention with other open-drain reset sources on shared reset bus; hysteresis prevents spurious resets during engine cranking transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM6348-36ARTZ-R7 | Same 3.6 V threshold and SOT-23 package, but open-drain RESET output requiring external pull-up resistor. | Suitable where multiple devices share a wired-OR reset bus or bidirectional MCU reset pins are used. | Select ADM6348-36ARTZ-R7 only if system architecture mandates open-drain signaling; otherwise ADM6346-36ARTZ-R7 reduces component count. |
| MAX6326T36R+T | 3.6 V threshold, push-pull output, but higher 2.5 µA max ICC and narrower −40°C to +85°C temp range with less hysteresis (5 mV). | Better suited for cost-sensitive consumer applications where ultra-low power is secondary to price. | Choose MAX6326T36R+T only if supply current >1 µA is acceptable and thermal stability requirements are relaxed. |
Compared with ADM6348-36ARTZ-R7, ADM6346-36ARTZ-R7 eliminates external pull-up needs and simplifies layout; versus MAX6326T36R+T, it delivers 2.5× lower supply current and tighter threshold tolerance-critical for long-life portable and industrial deployments.
Availability
ADM6346-36ARTZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wireless edge gateways, and automotive infotainment head units requiring stable component supply with guaranteed RoHS compliance and extended temperature support.
Supply support for ADM6346-36ARTZ-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 delivers precision, ultralow-power reset supervision for microprocessor-based systems where reliability under voltage transients and battery longevity are critical design constraints.
FAQ
What is the exact reset threshold voltage of ADM6346-36ARTZ-R7 and how does it vary with temperature?
The ADM6346-36ARTZ-R7 has a nominal reset threshold of 3.6 V at 25°C, with guaranteed range of 3.51 V to 3.69 V over −40°C to +85°C per Table 2. Its temperature coefficient is 40 ppm/°C, resulting in ≤±12 mV drift across the full operating range-sufficient for stable 3.3 V/3.6 V rail monitoring without calibration.
Does ADM6346-36ARTZ-R7 require an external pull-up resistor on the RESET pin?
No. ADM6346-36ARTZ-R7 features an active-low push-pull RESET output, capable of driving high to ≥0.8 × VCC and low to ≤0.3 V at 1.6 mA. This eliminates the need for an external pull-up resistor-unlike open-drain variants such as ADM6348-36ARTZ-R7-and simplifies schematic design and PCB layout.
Can ADM6346-36ARTZ-R7 operate when the monitored VCC drops below 2.0 V?
Yes. ADM6346-36ARTZ-R7 remains fully functional down to VCC = 1.0 V, maintaining valid RESET assertion (low state) and accurate threshold comparison. This enables fail-safe shutdown sequencing in battery-depleted conditions where other supervisors may lose regulation.
What is the minimum reset timeout period of ADM6346-36ARTZ-R7 and is it adjustable?
The ADM6346-36ARTZ-R7 provides a fixed minimum reset timeout of 100 ms after VCC rises above threshold, with typical value of 185 ms and maximum of 280 ms. This timeout is internally generated and not user-adjustable-ensuring consistent, predictable reset hold time compliant with JEDEC microprocessor startup requirements.
How does ADM6346-36ARTZ-R7 handle fast negative transients on the VCC line?
ADM6346-36ARTZ-R7 incorporates built-in glitch immunity against negative-going VCC transients. As shown in Figure 5, it tolerates pulses up to 200 mV below threshold for durations under 1 µs without asserting spurious RESET-preventing false resets caused by switching noise, ESD, or load-dump events in noisy power environments.
ADM6346-36ARTZ-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.6V
- Output:
- Push-Pull, Totem Pole
- 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
ADM6346-36ARTZ-R7 FAQ
1.How can I place an order for ADM6346-36ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-36ARTZ-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 ADM6346-36ARTZ-R7 reliable?
The price and inventory of ADM6346-36ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-36ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-36ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-36ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-36ARTZ-R7?
ADM6346-36ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-36ARTZ-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 ADM6346-36ARTZ-R7?
For technical support, including ADM6346-36ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-36ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-36ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-36ARTZ-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 ADM6346-36ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-36ARTZ-R7?
All ADM6346-36ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-36ARTZ-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 ADM6346-36ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-36ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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