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Analog Devices Inc. ADM6346-37ARTZ-R7
- Part No.:
- ADM6346-37ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-37ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,075
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Product details
Overview
ADM6346-37ARTZ-R7 from Analog Devices is a push-pull microprocessor reset circuit in 3-lead SOT-23 package, monitoring 3.7 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 ADM6346-37ARTZ-R7 datasheet, ADM6346-37ARTZ-R7 pinout, ADM6346-37ARTZ-R7 application, or ADM6346-37ARTZ-R7 equivalent, key selection criteria include reset threshold tolerance, push-pull output drive capability, ultralow ICC at 1 V VCC operation, and guaranteed reset assertion down to 1 V supply.
Technical Context
The ADM6346-37ARTZ-R7 implements a precision bandgap-based voltage comparator with internal hysteresis (9.5 mV) and a 100 ms–280 ms programmable reset timeout generator. Its push-pull RESET output drives low without external components and remains functional down to VCC = 1 V.
It features glitch immunity against negative-going VCC transients up to 200 mV overdrive, with response time under 20 µs when VCC falls below 3.7 V threshold. The device operates across full industrial temperature range with 40 ppm/°C temperature coefficient on VTH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.7 V nominal, ±2.5% over −40°C to +85°C - ensures stable reset assertion across temperature for 3.3 V–5 V rail monitoring |
| Supply Current (ICC) | 1.0 µA max at 3.2 V - enables multi-year battery life in always-on portable equipment |
| Reset Timeout (tRP) | 100–280 ms - holds microprocessor in reset long enough for power supply stabilization post-power-up |
| Operating Voltage Range | 1.0 V to 5.5 V - guarantees reset functionality even during deep brownout conditions |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor, simplifies PCB layout |
| VOL (RESET Low) | 0.3 V at 1.6 mA sink - ensures solid logic-low level compatible with 3.3 V and 5 V microcontroller inputs |
| Hysteresis | 9.5 mV - prevents chatter during slow VCC recovery near threshold |
Pinout & Package
ADM6346-37ARTZ-R7 uses 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, Pin 3 is VCC input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal comparator and output stage; must be connected directly to system ground plane |
| RESET (Pin 2) | Active-low push-pull output | Drives low during power-up/brownout; actively pulls high when deasserted - no external pull-up required |
| VCC (Pin 3) | Monitored supply input | Connects to 3.7 V rail being supervised; also powers internal circuitry - valid down to 1 V |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1 µA max enables integration into energy-harvesting and coin-cell-powered systems without measurable battery drain |
| Push-pull RESET | Eliminates external pull-up resistor, reduces BOM count and board area versus open-drain alternatives |
| Glitch-immune comparator | Rejects fast negative VCC transients ≤200 mV, preventing spurious resets in noisy power environments |
| 1 V minimum VCC operation | Ensures reset remains asserted until supply recovers fully - critical for safe microprocessor shutdown |
| −40°C to +85°C operation | Validated performance across full industrial temperature range without derating or calibration |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered wearable ECG monitors requiring multi-year operation with guaranteed startup integrity after cold boot or battery replacement. IC Role / Device Role / Timing Role: Supervises 3.7 V Li-ion battery rail and asserts reset until voltage stabilizes above 3.7 V ±2.5%, holding MCU in reset for ≥100 ms. Use Value: Prevents firmware execution at marginal supply levels, eliminating corrupted memory writes and sensor initialization failures. |
Use Scenario: DIN-rail mounted PLC modules operating in factory environments with fluctuating 24 V DC supplies converted to 3.7 V via LDO. IC Role / Device Role / Timing Role: Monitors post-regulator 3.7 V rail; triggers system-wide reset within 20 µs if input drops below threshold during transient dips. Use Value: Ensures deterministic recovery from brownouts without watchdog intervention, meeting IEC 61000-4-2/4-4 immunity requirements. |
| Wireless Edge Gateways | Automotive Infotainment Telematics |
Use Scenario: Cellular-connected edge gateways powered by 3.7 V battery backup during AC mains failure. IC Role / Device Role / Timing Role: Provides fail-safe reset coordination between modem, MCU, and RF front-end during power transitions. Use Value: Synchronizes subsystem reset timing to avoid race conditions and bus contention during recovery. |
Use Scenario: Telematics control units (TCUs) with dual-supply architecture where 3.7 V rail powers CAN transceivers and secure boot ROM. IC Role / Device Role / Timing Role: Guarantees secure boot sequence only initiates after 3.7 V rail reaches stable 3.7 V ±2.5% and sustains for ≥100 ms. Use Value: Meets ISO 26262 ASIL-B functional safety requirements for power-on reset integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326T37D2+T | 3.7 V threshold, open-drain output, 1.2 µA ICC, same SOT-23-3 package | Requires external pull-up resistor; less suitable for space-constrained layouts | Select when open-drain flexibility (e.g., wired-OR reset buses) is needed |
| TPS3808G33DBVR | 3.3 V threshold, push-pull output, 1.8 µA ICC, SOT-23-6 package | Different threshold and larger footprint; not drop-in for 3.7 V monitoring | Select only if 3.3 V rail supervision is acceptable and board real estate allows 6-pin variant |
Compared with MAX6326T37D2+T and TPS3808G33DBVR, ADM6346-37ARTZ-R7 uniquely combines 3.7 V precision threshold, push-pull output, and 1 µA ICC in a 3-pin SOT-23 - enabling minimal-footprint, zero-resistor reset supervision for 3.7 V battery-backed systems.
Availability
ADM6346-37ARTZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wireless edge gateways, and automotive infotainment telematics requiring stable component supply and RoHS-compliant packaging.
Supply support for ADM6346-37ARTZ-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.
The ADM63xx family delivers ultralow-power, precision voltage supervisors targeting battery-operated and industrial systems where reliable power-on reset and brownout protection are mission-critical.
FAQ
What is the exact reset threshold voltage of ADM6346-37ARTZ-R7 and its tolerance?
The ADM6346-37ARTZ-R7 has a nominal reset threshold of 3.7 V, with guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +85°C). At 25°C, typical threshold is 3.7 V, and min/max values are 3.607 V and 3.792 V respectively per Table 2 of the Rev. B datasheet.
Does ADM6346-37ARTZ-R7 require an external pull-up resistor on the RESET pin?
No. ADM6346-37ARTZ-R7 features an active-low push-pull RESET output (Pin 2), which actively drives both high and low states. Unlike open-drain variants such as ADM6348-37ARTZ-R7, it requires no external pull-up resistor - reducing component count and layout complexity.
Can ADM6346-37ARTZ-R7 operate reliably below 2.5 V supply voltage?
Yes. ADM6346-37ARTZ-R7 is fully specified to operate down to VCC = 1.0 V. Its RESET output remains valid and asserted until VCC rises above 3.7 V threshold, and it continues to monitor and respond to brownout events even at 1 V - a key feature for deep low-voltage recovery.
What is the reset timeout duration of ADM6346-37ARTZ-R7 and how does it vary with temperature?
The ADM6346-37ARTZ-R7 provides a minimum reset timeout of 100 ms, with typical value of 185 ms and maximum of 280 ms. As shown in Figure 6 of the datasheet, this timeout remains stable across −40°C to +85°C, varying only within that bounded range without external timing components.
How does ADM6346-37ARTZ-R7 handle fast power supply transients?
ADM6346-37ARTZ-R7 incorporates built-in glitch immunity: it ignores negative-going VCC transients ≤200 mV in magnitude, as verified in Figure 5. This prevents false resets caused by switching noise or load-step events, ensuring robust operation in electrically noisy environments like motor drives or RF modules.
ADM6346-37ARTZ-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:
- 3.7V
- 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
ADM6346-37ARTZ-R7 FAQ
1.How can I place an order for ADM6346-37ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-37ARTZ-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 ADM6346-37ARTZ-R7 reliable?
The price and inventory of ADM6346-37ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-37ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-37ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-37ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-37ARTZ-R7?
ADM6346-37ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-37ARTZ-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 ADM6346-37ARTZ-R7?
For technical support, including ADM6346-37ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-37ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-37ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-37ARTZ-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 ADM6346-37ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-37ARTZ-R7?
All ADM6346-37ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-37ARTZ-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 ADM6346-37ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-37ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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