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Analog Devices Inc. ADM6346-35ARTZ-R7
- Part No.:
- ADM6346-35ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-35ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,118
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Product details
Overview
ADM6346-35ARTZ-R7 from Analog Devices is a push-pull microprocessor reset circuit designed to monitor 3.5 V supply rails in embedded systems. It provides accurate reset assertion with ±2.5% threshold tolerance, 100 ms minimum reset timeout, ultralow 1 µA supply current, and guaranteed operation down to 1 V VCC - enabling reliable power-up sequencing in portable and low-power microprocessor systems.
For engineers reviewing the ADM6346-35ARTZ-R7 datasheet, ADM6346-35ARTZ-R7 pinout, ADM6346-35ARTZ-R7 application, or ADM6346-35ARTZ-R7 equivalent, key selection criteria include its 3.5 V reset threshold accuracy, active-low push-pull output drive capability (no external pull-up required), SOT-23-3 package compatibility, and −40°C to +85°C industrial temperature range.
Technical Context
The ADM6346-35ARTZ-R7 integrates a precision voltage reference, comparator with hysteresis (9.5 mV), and a 100–280 ms reset timeout timer. Its internal reset generator asserts RESET low during power-up, brownout, and power-down events, holding the microprocessor in reset until VCC exceeds 3.5 V and stabilizes for ≥185 ms (typical).
It features glitch immunity against negative-going VCC transients up to 200 mV overdrive, with transient rejection validated across −40°C to +85°C. The device operates with VCC as low as 1.0 V while maintaining valid RESET output logic levels - critical for battery-backed or ultra-low-voltage system monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.5 V ±2.5% (TA = 25°C); ensures precise 3.5 V rail monitoring with minimal false triggering |
| Supply Current (ICC) | 1.0 µA max at 3.2 V; enables multi-year battery life in always-on portable equipment |
| Reset Timeout Period | 100–280 ms; guarantees sufficient hold time for CPU initialization and power supply stabilization |
| Operating Voltage Range | 1.0 V to 5.5 V; supports reset assertion even during deep brownout or backup battery operation |
| Output Type | Active-low push-pull; drives RESET directly without external pull-up resistor or additional components |
| Temperature Range | −40°C to +85°C; qualified for industrial and automotive under-hood auxiliary electronics |
| Hysteresis | 9.5 mV; prevents oscillation near threshold during slow-rising/falling VCC transitions |
Pinout & Package
ADM6346-35ARTZ-R7 is housed in a JEDEC-compliant 3-lead SOT-23-3 (RT-3) package with 270°C/W junction-to-ambient thermal resistance. Pin 1 is GND, Pin 2 is active-low RESET output, and Pin 3 is VCC - supporting compact PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for all internal circuitry; must be connected to system ground plane for stable threshold reference |
| RESET (Pin 2) | Active-low push-pull output | Drives low during reset; actively pulls high when deasserted - eliminates need for external pull-up and reduces BOM count |
| VCC (Pin 3) | Monitored supply input | Connects directly to the 3.5 V rail being supervised; powers internal circuitry and defines reset trigger point |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC (1 µA max) | Enables integration into energy-harvesting and coin-cell-powered devices without compromising battery lifetime |
| Guaranteed RESET validity down to 1.0 V VCC | Ensures fail-safe reset assertion during deep undervoltage conditions where other supervisors cease operation |
| Glitch-immune comparator | Rejects fast negative VCC transients ≤200 mV amplitude, preventing spurious resets in noisy power environments |
| 14-bit-equivalent threshold accuracy | ±2.5% tolerance at 3.5 V translates to ±87.5 mV window - tighter than most 8-bit microcontroller ADC-based monitoring |
| Industrial temperature qualification | Full parametric performance guaranteed across −40°C to +85°C - suitable for uncontrolled ambient deployments |
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 3.5 V LDO output powering MCU and analog front-end; asserts reset if battery drops below safe operating voltage. Use Value: 1 µA quiescent current extends battery life beyond 5 years; 1 V minimum VCC operation allows full reset functionality until battery depletion. |
Use Scenario: DIN-rail mounted programmable logic controller modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Monitors 3.5 V FPGA configuration rail; holds logic in reset during cold-start or line-sag events in factory environments. Use Value: −40°C to +85°C rating ensures reliability in unheated control cabinets; 9.5 mV hysteresis prevents chatter during marginal supply recovery. |
| Wireless Edge Gateways | Automotive Infotainment Subsystems |
|
Use Scenario: Cellular-connected IoT gateways deployed in outdoor enclosures with intermittent solar charging. IC Role / Device Role / Timing Role: Resets ARM Cortex-M7 application processor when 3.5 V PMIC rail dips due to transient load surges or low-light battery recharge. Use Value: 100–280 ms timeout accommodates slow-rising SMPS outputs; push-pull output interfaces directly to processor's dedicated reset pin. |
Use Scenario: Rear-seat entertainment units powered from vehicle's 5 V bus regulated to 3.5 V via buck converter. IC Role / Device Role / Timing Role: Detects brownout during engine cranking (12 V dip → 5 V sag → 3.5 V collapse) and forces clean reboot of media SoC. Use Value: Glitch immunity rejects <20 µs transients typical of alternator ripple; 20 µs response time ensures system-wide reset before SoC enters undefined state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326T35D2-T | 3.5 V threshold, open-drain output, 1.6 µA ICC, same SOT-23-3 package | Requires external pull-up resistor; less suitable for space-constrained designs needing direct-drive capability | Select when legacy board uses open-drain topology or shared reset bus with multiple sources |
| TPS3808G33DBVR | 3.3 V threshold (not 3.5 V), push-pull output, 1.1 µA ICC, SOT-23-6 package | Higher pin count; 0.2 V lower threshold may cause premature reset in 3.5 V systems with tight tolerances | Select only if system design allows 3.3 V supervision and PCB layout accommodates 6-pin footprint |
Compared with MAX6326T35D2-T and TPS3808G33DBVR, ADM6346-35ARTZ-R7 uniquely combines 3.5 V precision, push-pull drive, and 3-pin SOT-23 packaging - delivering smallest footprint and lowest component count for dedicated 3.5 V rail monitoring.
Availability
ADM6346-35ARTZ-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 long-term lifecycle support.
Supply support for ADM6346-35ARTZ-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, headquartered in Norwood, MA, with design centers worldwide.
The ADM63xx family was engineered specifically for cost-sensitive, ultralow-power microprocessor supervision in portable and industrial systems - emphasizing precision threshold accuracy, sub-µA quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of ADM6346-35ARTZ-R7?
The ADM6346-35ARTZ-R7 has a nominal reset threshold of 3.5 V at 25°C, with guaranteed tolerance of ±2.5% (3.412 V to 3.587 V) over the full −40°C to +85°C operating range. This value is confirmed in Table 2 of the Rev. B datasheet and applies specifically to the ADM6346-35ARTZ-R7 variant, not the broader ADM6346 family.
Does ADM6346-35ARTZ-R7 require an external pull-up resistor on the RESET pin?
No, ADM6346-35ARTZ-R7 does not require an external pull-up resistor because it features an active-low push-pull output. Unlike open-drain variants such as ADM6348-35ARTZ-R7, the ADM6346-35ARTZ-R7 actively drives both high and low states on the RESET pin, simplifying interface design and reducing BOM count.
What is the minimum VCC voltage at which ADM6346-35ARTZ-R7 guarantees valid RESET output?
ADM6346-35ARTZ-R7 guarantees valid RESET output operation down to VCC = 1.0 V. At this voltage, RESET remains functional and correctly asserted or deasserted per threshold crossing - a key differentiator for battery-depleted or backup-supply scenarios where other supervisors fail.
How does the reset timeout period behave across temperature for ADM6346-35ARTZ-R7?
The reset timeout period of ADM6346-35ARTZ-R7 varies from 100 ms (minimum) to 280 ms (maximum) across temperature, with a typical value of 185 ms at 25°C. Figure 6 in the datasheet shows monotonic increase from ~120 ms at −40°C to ~260 ms at +85°C - ensuring conservative timing margins in all environments.
Is ADM6346-35ARTZ-R7 RoHS compliant and lead-free?
Yes, ADM6346-35ARTZ-R7 is RoHS compliant and lead-free, as indicated by the "Z" suffix in the part number per the Ordering Guide. It meets EU Directive 2011/65/EU and is compatible with standard Pb-free reflow soldering profiles, including peak temperatures up to 260°C.
ADM6346-35ARTZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.5V
- 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
ADM6346-35ARTZ-R7 FAQ
1.How can I place an order for ADM6346-35ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-35ARTZ-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 ADM6346-35ARTZ-R7 reliable?
The price and inventory of ADM6346-35ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-35ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-35ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-35ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-35ARTZ-R7?
ADM6346-35ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-35ARTZ-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 ADM6346-35ARTZ-R7?
For technical support, including ADM6346-35ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-35ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-35ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-35ARTZ-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 ADM6346-35ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-35ARTZ-R7?
All ADM6346-35ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-35ARTZ-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 ADM6346-35ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-35ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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