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Analog Devices Inc. ADM6346-42ARTZ-R7
- Part No.:
- ADM6346-42ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-42ARTZ-R7.pdf
- Description:
- ADM6346 - ULTRALOW POWER MICROPR
- Quantity:
- Payment:
- Shipping:
Inventory:9,876
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Product details
Overview
ADM6346-42ARTZ-R7 from Analog Devices is an ultralow-power, active-low push-pull microprocessor reset circuit in a 3-lead SOT-23 package, with a precise 4.2 V ±2.5% reset threshold, 100 ms minimum reset timeout, 1 µA maximum supply current at 3 V, and guaranteed operation down to VCC = 1 V. It monitors 4.2 V supply rails in portable and embedded systems requiring reliable power-on reset sequencing.
For engineers reviewing the ADM6346-42ARTZ-R7 datasheet, ADM6346-42ARTZ-R7 pinout, ADM6346-42ARTZ-R7 application, or ADM6346-42ARTZ-R7 equivalent, key selection criteria include reset threshold accuracy (±2.5%), push-pull output drive capability (1.6 mA sink), glitch immunity against fast VCC transients, −40°C to +85°C operating range, and compatibility with low-voltage brownout detection down to 1 V.
Technical Context
The ADM6346-42ARTZ-R7 integrates a precision voltage reference, comparator with hysteresis (9.5 mV), and a 100–280 ms internal reset timeout timer. Its push-pull RESET output asserts low when VCC falls below 4.2 V and remains asserted for ≥100 ms after VCC rises above threshold.
Designed for single-supply monitoring, it operates across 1.0 V to 5.5 V VCC, delivers VOL ≤ 0.3 V at ISINK = 1.6 mA (VCC > 2.1 V), and maintains valid reset signaling even as VCC decays to 1 V - enabling robust brownout response in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.2 V ±2.5% (min 4.095 V, max 4.305 V at −40°C to +85°C) - ensures accurate 4.2 V rail supervision with temperature-stable trip point. |
| Supply Current | 1.0 µA max at 3 V - enables multi-year battery life in always-on portable equipment. |
| Reset Timeout | 100–280 ms (typical 185 ms) - guarantees sufficient system stabilization time before processor release from reset. |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and supports direct interface to CMOS inputs. |
| VCC Operating Range | 1.0 V to 5.5 V - allows valid reset assertion during deep brownout and compatibility with wide-input systems. |
| Reset Propagation Delay | 20 µs typical (VCC → VTH −100 mV) - ensures rapid fault response before downstream logic enters undefined states. |
| Temperature Range | −40°C to +85°C - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
ADM6346-42ARTZ-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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | 0 V return path for all internal circuitry; must be connected directly to system ground plane for noise immunity. |
| 2 (RESET) | Active-Low Push-Pull Output | Drives low (≤0.3 V @ 1.6 mA) during reset; drives high (≥0.8×VCC) otherwise - compatible with standard CMOS input thresholds. |
| 3 (VCC) | Monitored Supply Input | Input voltage source being supervised; device functions correctly from 1.0 V to 5.5 V and asserts reset if VCC drops below 4.2 V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1.0 µA max ensures minimal impact on battery capacity in always-on IoT sensors and wearables. |
| Glitch Immunity | Rejects negative-going VCC transients up to 200 mV overdrive without false triggering - critical for noisy DC-DC outputs. |
| Precision Threshold | 4.2 V ±2.5% with 40 ppm/°C tempco - eliminates need for external calibration in 4.2 V Li-ion battery monitoring. |
| Brownout Operation | Valid RESET assertion down to VCC = 1.0 V - enables fail-safe shutdown before memory corruption or latch-up. |
| Fast Response | 20 µs reset assertion delay ensures synchronous system-wide reset before any subsystem violates its min VCC spec. |
Applications
| Li-ion Battery-Powered Portable Devices | Industrial Microcontroller Systems |
|---|---|
|
Use Scenario: Monitoring 4.2 V fully charged Li-ion battery output in handheld medical meters or BLE sensors. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset and brownout protection for ARM Cortex-M0+ MCU. Use Value: Prevents boot failure during battery voltage sag by asserting reset until VCC stabilizes above 4.095 V, with <1 µA quiescent draw extending runtime. |
Use Scenario: Ensuring deterministic startup of PLC I/O modules powered from 4.2 V isolated DC-DC converters. IC Role / Device Role / Timing Role: Reset generator enforcing 185 ms minimum reset hold time after power application. Use Value: Guarantees FPGA configuration completes and analog front-end references settle before firmware execution begins. |
| Telecom Line Cards | Notebook/Embedded PC Power Sequencing |
|
Use Scenario: Supervising auxiliary 4.2 V bias rail in optical transceiver modules subject to hot-swap transients. IC Role / Device Role / Timing Role: Glitch-immune reset supervisor rejecting fast negative spikes on VCC without spurious resets. Use Value: Maintains system uptime by ignoring transients ≤200 mV while responding within 20 µs to true brownouts. |
Use Scenario: Coordinating reset timing between CPU, PMIC, and DDR memory during 4.2 V SoC core rail ramp-up. IC Role / Device Role / Timing Role: Push-pull reset driver eliminating external pull-up and reducing BOM count. Use Value: Simplifies layout with single-output reset signal that sinks 1.6 mA - compatible with Intel/AMD reset input requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342EUR+T | 4.2 V threshold, open-drain output, 2.5 µA ICC, 140 ms timeout | Requires external pull-up; higher supply current reduces battery life in ultra-low-power designs | Select when open-drain flexibility (e.g., wired-OR reset buses) is required and 1.5 µA extra ICC is acceptable. |
| TPS3808G33DBVR | 3.3 V fixed threshold, push-pull output, 1.1 µA ICC, 200 ms timeout | Not suitable for 4.2 V rail monitoring - mismatched threshold invalidates brownout detection | Use only for 3.3 V systems; not a functional substitute for ADM6346-42ARTZ-R7's 4.2 V specification. |
Compared with MAX6342EUR+T, ADM6346-42ARTZ-R7 saves 1.5 µA supply current and eliminates pull-up components; compared with TPS3808G33DBVR, it provides correct 4.2 V threshold alignment essential for Li-ion battery systems - making it the only viable option for accurate 4.2 V rail supervision.
Availability
ADM6346-42ARTZ-R7 is available at Aetrix Electronics and suitable for Li-ion battery monitoring, industrial microcontroller startups, telecom line card supervision, and notebook power sequencing requiring stable component supply and RoHS-compliant packaging.
Supply support for ADM6346-42ARTZ-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 ADM63xx family was designed specifically for ultralow-power, precision supply voltage supervision in portable and embedded systems - emphasizing sub-µA ICC, tight threshold tolerance, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of ADM6346-42ARTZ-R7 over temperature?
The ADM6346-42ARTZ-R7 has a nominal reset threshold of 4.2 V at 25°C, with guaranteed limits of 4.095 V (min) to 4.305 V (max) across −40°C to +85°C per Table 2 of the datasheet. Its temperature coefficient is 40 ppm/°C, ensuring stable trip points in thermally varying environments like industrial enclosures or automotive cabins.
Does ADM6346-42ARTZ-R7 require an external pull-up resistor on the RESET pin?
No, ADM6346-42ARTZ-R7 features an active-low push-pull RESET output and does not require an external pull-up resistor. This simplifies design, reduces BOM count, and ensures defined logic levels without dependency on external components - unlike open-drain alternatives such as ADM6348-42ARTZ-R7.
Can ADM6346-42ARTZ-R7 operate reliably when VCC drops below 2.1 V?
Yes, ADM6346-42ARTZ-R7 remains fully functional down to VCC = 1.0 V. Its RESET output stays asserted (low) with VOL ≤ 0.4 V at ISINK = 100 µA even at 1.2 V, and continues to monitor VCC accurately - enabling safe brownout shutdown before critical logic fails.
What is the minimum reset timeout duration for ADM6346-42ARTZ-R7?
The ADM6346-42ARTZ-R7 guarantees a minimum reset timeout of 100 ms after VCC rises above the 4.2 V threshold. Typical timeout is 185 ms, with maximum 280 ms across temperature - ensuring sufficient time for power supply stabilization and microprocessor initialization before release from reset.
Is ADM6346-42ARTZ-R7 RoHS compliant and what package does it use?
Yes, ADM6346-42ARTZ-R7 is RoHS compliant (indicated by the "Z" suffix) and packaged in a 3-lead SOT-23-3 (RT-3) outline per JEDEC TO-236-AB standards. Its compact footprint and lead-free finish meet modern environmental and assembly requirements for high-density PCBs.
ADM6346-42ARTZ-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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.2V
- 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
ADM6346-42ARTZ-R7 FAQ
1.How can I place an order for ADM6346-42ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-42ARTZ-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 ADM6346-42ARTZ-R7 reliable?
The price and inventory of ADM6346-42ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-42ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-42ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-42ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-42ARTZ-R7?
ADM6346-42ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-42ARTZ-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 ADM6346-42ARTZ-R7?
For technical support, including ADM6346-42ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-42ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-42ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-42ARTZ-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 ADM6346-42ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-42ARTZ-R7?
All ADM6346-42ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-42ARTZ-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 ADM6346-42ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-42ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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