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Analog Devices Inc. ADM6346-39ARTZ-R7
- Part No.:
- ADM6346-39ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-39ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,906
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Product details
Overview
ADM6346-39ARTZ-R7 from Analog Devices is a precision 3.9 V supply voltage supervisor IC with push-pull active-low reset output, ultralow 1 µA supply current, 100 ms minimum reset timeout, and operation down to 1 V VCC. It monitors power rails in microprocessor systems requiring reliable brownout detection and glitch-immune reset assertion during startup and transient events.
For engineers reviewing the ADM6346-39ARTZ-R7 datasheet, ADM6346-39ARTZ-R7 pinout, ADM6346-39ARTZ-R7 application, or ADM6346-39ARTZ-R7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), SOT-23-3 package compatibility, push-pull drive capability without external pull-up, and guaranteed operation across −40°C to +85°C.
Technical Context
The ADM6346-39ARTZ-R7 integrates a precision bandgap reference, comparator with hysteresis (9.5 mV), and internal 100–280 ms reset timeout timer. Its push-pull RESET output drives low with ≤0.3 V VOL at 1.6 mA sink current while remaining functional down to VCC = 1 V - enabling robust reset assertion even during deep brownout conditions.
Designed for high-noise environments, it provides glitch immunity against negative-going VCC transients up to 200 mV overdrive for durations under 1 µs (per Figure 5). The device uses a single-supply architecture with no external components required beyond decoupling capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.9 V ±2.5% over −40°C to +85°C - ensures accurate 3.3 V/3.6 V rail monitoring with margin for supply tolerance and drift. |
| Supply Current | 1.0 µA max at 3.2 V - enables integration into battery-powered portable equipment without measurable impact on standby life. |
| Reset Timeout | 100–280 ms - holds microprocessor in reset long enough for power supply stabilization and clock circuit lock. |
| VCC Operating Range | 1.0 V to 5.5 V - supports reset assertion during deep undervoltage events and compatibility with 1.8 V–5 V logic domains. |
| RESET Output Type | Active-low push-pull - eliminates need for external pull-up resistor and guarantees defined high/low states without external biasing. |
| Hysteresis | 9.5 mV - prevents oscillatory reset toggling near threshold during slow-rising/falling VCC transitions. |
| Reset Propagation Delay | 20 µs typical - ensures sub-microsecond response to VCC falling below 3.9 V, critical for preventing partial execution during brownout. |
Pinout & Package
ADM6346-39ARTZ-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 output stage; must be connected directly to system ground plane for noise immunity. |
| RESET (Pin 2) | Active-low push-pull output | Drives low during reset (VCC < 3.9 V); actively pulls high when released - compatible with CMOS/TTL reset inputs without pull-up. |
| VCC (Pin 3) | Monitored supply input | Primary power rail being supervised; also powers internal circuitry - requires local 0.1 µF ceramic decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1 µA max enables multi-year battery life in always-on IoT sensors and portable medical devices. |
| Precision 3.9 V threshold | ±2.5% over full temperature range ensures reliable reset activation for 3.3 V systems with 10% tolerance and aging drift. |
| Glitch-immune comparator | Rejects negative VCC transients ≤1 µs duration at 200 mV overdrive - prevents spurious resets in noisy DC/DC converter environments. |
| 1 V minimum operating voltage | Guarantees reset assertion integrity even as VCC collapses below 1.2 V - critical for fail-safe shutdown in power-loss scenarios. |
| Push-pull RESET output | Eliminates external pull-up resistor and associated BOM cost, layout area, and signal rise-time uncertainty. |
Applications
| Telecommunications Baseband | Industrial PLC Controller |
|---|---|
|
Use Scenario: Monitoring 3.3 V FPGA configuration supply in LTE small cell radios subject to thermal cycling and EMI. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to FPGA configuration logic until 3.3 V rail stabilizes post-power-up. Use Value: Prevents corrupted bitstream loading by enforcing ≥100 ms reset hold time and rejecting fast transients from RF front-end switching noise. |
Use Scenario: Supervising 3.6 V I/O power rail in modular PLC backplane where brownout resilience is mandated by IEC 61000-4-29. IC Role / Device Role / Timing Role: Primary reset source for ARM Cortex-M7 MCU and isolated CAN transceivers during AC line sags. Use Value: Maintains reset assertion down to 1 V VCC and delivers precise 3.9 V threshold with ±2.5% accuracy - meeting SIL-2 functional safety margin requirements. |
| Medical Infusion Pump | Automotive Body Control Module |
|
Use Scenario: Securing 3.3 V microcontroller supply in battery-operated infusion pumps requiring >5-year shelf life and zero false resets. IC Role / Device Role / Timing Role: Low-power supervisor enabling wake-from-sleep reset sequencing and brownout recovery without external components. Use Value: 1 µA supply current extends primary Li-SOCl₂ battery life; push-pull output avoids pull-up leakage that would degrade standby current. |
Use Scenario: Monitoring 3.3 V domain powering LIN transceivers and EEPROM in BCMs exposed to automotive load dump and cold crank. IC Role / Device Role / Timing Role: Reset generator with fast 20 µs response to detect 3.3 V rail collapse during cranking events. Use Value: 9.5 mV hysteresis prevents chatter during slow VCC recovery; guaranteed operation to −40°C ensures cold-start reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6346T39D2+T | 3.9 V threshold, open-drain output, 1.6 µA ICC, same SOT-23-3 package | Requires external pull-up resistor; higher supply current reduces battery life in ultra-low-power designs | Select if open-drain flexibility is needed for wired-OR reset bus architectures. |
| TPS3808G39DBVR | 3.9 V threshold, push-pull output, 1.1 µA ICC, SOT-23-6 package (6-pin) | Larger footprint and extra pins (EN, CT) add complexity; no direct pin compatibility | Choose only if adjustable delay or enable control is required - otherwise ADM6346-39ARTZ-R7 offers superior size/power trade-off. |
Compared with MAX6346T39D2+T and TPS3808G39DBVR, ADM6346-39ARTZ-R7 delivers identical 3.9 V supervision with lower quiescent current and true 3-pin simplicity - eliminating both pull-up resistors and unused control pins to reduce BOM count and PCB area.
Availability
ADM6346-39ARTZ-R7 is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial PLC controllers, medical infusion pumps, and automotive body control modules requiring stable component supply and RoHS-compliant packaging.
Supply support for ADM6346-39ARTZ-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 targets cost-sensitive, space-constrained microprocessor systems needing reliable, ultralow-power supply monitoring - especially in portable, battery-powered, and thermally demanding applications.
FAQ
What is the exact reset threshold voltage of ADM6346-39ARTZ-R7 and how tightly is it specified?
The ADM6346-39ARTZ-R7 has a nominal reset threshold of 3.9 V, with guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +85°C). At 25°C, the threshold is 3.841 V (min) to 3.958 V (max); over temperature, it spans 3.802 V to 3.997 V. This specification ensures reliable supervision of 3.3 V and 3.6 V rails with adequate margin for supply ripple and aging drift.
Does ADM6346-39ARTZ-R7 require an external pull-up resistor on its RESET pin?
No, ADM6346-39ARTZ-R7 features an active-low push-pull RESET output, meaning it actively drives both high and low states internally. Unlike open-drain supervisors (e.g., ADM6348-39ARTZ-R7), it does not require an external pull-up resistor - simplifying design, reducing BOM count, and eliminating potential leakage paths that could compromise ultra-low-power operation.
What is the minimum VCC voltage at which ADM6346-39ARTZ-R7 continues to assert RESET reliably?
ADM6346-39ARTZ-R7 guarantees RESET assertion functionality down to VCC = 1.0 V. This allows the device to maintain a valid active-low reset signal even during severe brownout or battery depletion scenarios - ensuring microprocessors remain held in reset until the supply recovers sufficiently to support stable operation.
How does ADM6346-39ARTZ-R7 handle fast negative transients on the monitored VCC rail?
ADM6346-39ARTZ-R7 incorporates built-in glitch immunity that rejects negative-going VCC transients up to 200 mV in magnitude for pulse widths under 1 µs (per Figure 5 in the datasheet). This prevents spurious resets caused by switching noise from DC/DC converters or load transients - a critical feature in electrically noisy environments like telecom base stations or motor-driven industrial systems.
Is ADM6346-39ARTZ-R7 pin-compatible with other members of the ADM63xx family?
Yes, ADM6346-39ARTZ-R7 shares the identical 3-lead SOT-23-3 (RT-3) pinout with all ADM6326/ADM6328/ADM6346/ADM6348 variants - Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC. However, output structure differs: ADM6346-39ARTZ-R7 uses push-pull, while ADM6348-39ARTZ-R7 uses open-drain. Swapping between them requires verifying reset bus topology compatibility.
ADM6346-39ARTZ-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:
- 3.9V
- 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
ADM6346-39ARTZ-R7 FAQ
1.How can I place an order for ADM6346-39ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-39ARTZ-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 ADM6346-39ARTZ-R7 reliable?
The price and inventory of ADM6346-39ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-39ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-39ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-39ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-39ARTZ-R7?
ADM6346-39ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-39ARTZ-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 ADM6346-39ARTZ-R7?
For technical support, including ADM6346-39ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-39ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-39ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-39ARTZ-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 ADM6346-39ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-39ARTZ-R7?
All ADM6346-39ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-39ARTZ-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 ADM6346-39ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-39ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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