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Analog Devices Inc. ADM6346-46ARTZ-R7
- Part No.:
- ADM6346-46ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-46ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,913
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Product details
Overview
ADM6346-46ARTZ-R7 from Analog Devices is a push-pull microprocessor reset circuit designed to monitor 4.63 V supply rails in embedded systems. It delivers ultralow 1.0 µA typical supply current, guarantees reset assertion down to 1 V VCC, and provides a minimum 100 ms reset timeout with ±2.5% threshold accuracy over −40°C to +85°C. It is used in portable equipment where reliable power-on reset and brownout protection are critical.
For engineers reviewing the ADM6346-46ARTZ-R7 datasheet, ADM6346-46ARTZ-R7 pinout, ADM6346-46ARTZ-R7 application, or ADM6346-46ARTZ-R7 equivalent, key selection criteria include its 4.63 V reset threshold tolerance, push-pull active-low output drive capability, 1 µA max ICC at 3 V, glitch immunity against negative VCC transients, and SOT-23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The ADM6346-46ARTZ-R7 implements a precision voltage comparator with internal reference and a 100–280 ms reset timeout timer. Its reset generator asserts active-low RESET within 20 µs when VCC falls below 4.63 V (±2.5%), and holds it for ≥100 ms after VCC rises above threshold - ensuring stable microprocessor initialization.
It features built-in hysteresis (9.5 mV), operates across 1.0 V to 5.5 V VCC, and maintains valid RESET output down to 1 V supply. The push-pull output drives low to ≤0.3 V at 1.6 mA sink current and high to ≥0.8 × VCC, eliminating need for external pull-up resistors unlike open-drain variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V ±2.5% (TA = −40°C to +85°C); ensures accurate detection of 4.63 V rail collapse without false triggering. |
| Supply Current (ICC) | 1.0 µA max at 3 V; enables multi-year battery life in always-on portable monitoring applications. |
| Reset Timeout (tRP) | 100–280 ms; guarantees sufficient hold time for full system stabilization before processor release from reset. |
| Output Type | Active-low push-pull; drives RESET directly to logic low or high without external components, simplifying interface design. |
| VCC Operating Range | 1.0 V to 5.5 V; supports operation during deep brownout and allows use with wide-input DC-DC converters. |
| Hysteresis | 9.5 mV; prevents oscillation near threshold during slow-rising/falling supply transitions. |
| Reset Propagation Delay | 20 µs max (VCC → VTH − 100 mV); enables fast system-wide reset initiation before downstream ICs violate min VCC. |
Pinout & Package
ADM6346-46ARTZ-R7 is housed in a JEDEC-compliant 3-lead SOT-23-3 (RT-3) package with 270°C/W thermal resistance, optimized for compact PCB footprints and reflow soldering.
| 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 accurate threshold sensing. |
| RESET (Pin 2) | Active-low push-pull output | Drives low (≤0.3 V @ 1.6 mA) or high (≥0.8 × VCC) to directly control microprocessor / FPGA reset input without pull-up. |
| VCC (Pin 3) | Monitored supply input | Connects to 4.63 V rail; powers device and serves as voltage source for threshold comparison; functional down to 1 V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1.0 µA max ensures minimal impact on battery-powered system standby current budgets. |
| Precision 4.63 V threshold | ±2.5% tolerance over full temperature range eliminates need for external calibration in industrial-grade designs. |
| Glitch-immune comparator | Rejects negative VCC transients up to 100 µs duration (per Figure 5), preventing spurious resets during EMI events. |
| Push-pull RESET output | Eliminates external pull-up resistor requirement, reducing BOM count and layout complexity vs. open-drain alternatives. |
| 1 V minimum VCC operation | Enables reliable reset assertion even during severe brownout conditions where other supervisors fail. |
Applications
| Industrial PLC I/O Modules | Portable Medical Sensors |
|---|---|
|
Use Scenario: Power cycling in field-deployed programmable logic controllers subject to unstable 4.8 V auxiliary rails. IC Role / Device Role / Timing Role: Supervisor IC that monitors 4.63 V logic supply and asserts hardware reset to ARM Cortex-M7 MCU upon undervoltage. Use Value: Prevents firmware corruption by guaranteeing ≥100 ms reset hold time after rail recovery, meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Battery-operated glucose meters requiring guaranteed startup integrity after cold-weather storage. IC Role / Device Role / Timing Role: Reset generator tied to 4.63 V LDO output powering ADC and BLE SoC. Use Value: 1.0 µA max ICC extends shelf life; 4.63 V threshold matches LDO nominal output, minimizing margin loss vs. 5 V rail. |
| Automotive Infotainment Head Units | Smart Energy Meters |
|
Use Scenario: 4.63 V domain supply in head unit mainboard exposed to load-dump transients and cold-cranking dips. IC Role / Device Role / Timing Role: Primary reset supervisor for application processor and display controller during VCC sag. Use Value: 9.5 mV hysteresis and 20 µs response prevent chatter during 12 V battery dip; −40°C to +85°C rating covers under-hood thermal range. |
Use Scenario: Tamper-resistant meter with isolated 4.63 V RTC and secure element supply. IC Role / Device Role / Timing Role: Brownout detector for real-time clock subsystem powered from backup capacitor. Use Value: Valid RESET output down to 1 V VCC ensures deterministic reset even as capacitor discharges below 2 V, preserving timekeeping integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR46+T | 4.63 V threshold, open-drain output, 1.2 µA ICC, same SOT-23-3 package. | Requires external pull-up resistor; less suitable for high-noise environments where push-pull noise immunity matters. | Select if board already uses open-drain reset architecture or shares RESET bus with multiple devices. |
| TPS3808G33DBVR | 3.3 V threshold (not 4.63 V), push-pull output, 1.1 µA ICC, SOT-23-5 package with manual reset input. | Not functionally interchangeable due to different threshold and 5-pin footprint; requires PCB redesign. | Consider only if redesigning for dual-supply monitoring or adding manual reset functionality. |
Compared with MAX6326XR46+T and TPS3808G33DBVR, ADM6346-46ARTZ-R7 uniquely combines 4.63 V precision, push-pull drive, and 3-pin SOT-23 packaging - enabling drop-in replacement in legacy 4.63 V rail supervision designs without layout changes or added passives.
Availability
ADM6346-46ARTZ-R7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable medical sensors, and smart energy meters requiring stable component supply with RoHS-compliant packaging and extended temperature support.
Supply support for ADM6346-46ARTZ-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 delivers ultralow-power, precision voltage supervisors targeting battery-powered and space-constrained embedded systems needing reliable power-on and brownout reset functionality.
FAQ
What is the exact reset threshold voltage of ADM6346-46ARTZ-R7 and how tightly is it specified?
The ADM6346-46ARTZ-R7 has a nominal reset threshold of 4.63 V, with a guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +85°C). At 25°C, the threshold is 4.63 V ±1.5%, and the datasheet specifies min/max values of 4.56 V to 4.699 V at 25°C and 4.514 V to 4.746 V across temperature. This precision eliminates need for external trimming in most 4.63 V rail applications.
Does ADM6346-46ARTZ-R7 require an external pull-up resistor on the RESET pin?
No, ADM6346-46ARTZ-R7 does not require an external pull-up resistor because it features an active-low push-pull output. The RESET pin actively drives high to ≥0.8 × VCC and low to ≤0.3 V at 1.6 mA sink current. This differs from open-drain variants like ADM6348-46ARTZ-R7, which do require a pull-up. Using ADM6346-46ARTZ-R7 simplifies schematic design and reduces component count.
What is the minimum VCC voltage at which ADM6346-46ARTZ-R7 continues to assert RESET correctly?
ADM6346-46ARTZ-R7 guarantees valid RESET assertion down to VCC = 1.0 V. Below this, the internal comparator and timer may become nonfunctional. This capability ensures reliable brownout detection even as backup capacitors discharge or during severe undervoltage events - a key advantage over supervisors that cease operation above 1.5 V.
How long does the RESET signal remain asserted after power-up for ADM6346-46ARTZ-R7?
After VCC rises above the 4.63 V threshold, ADM6346-46ARTZ-R7 holds RESET low for a guaranteed minimum of 100 ms, with typical timeout of 185 ms and maximum of 280 ms. This internal timer ensures microprocessors have sufficient time to stabilize clocks and peripherals before exiting reset - critical for deterministic boot in industrial and medical systems.
Is ADM6346-46ARTZ-R7 compatible with lead-free reflow soldering processes?
Yes, ADM6346-46ARTZ-R7 is RoHS-compliant (denoted by the "Z" suffix) and qualified for standard lead-free reflow soldering per JEDEC J-STD-020. Its SOT-23-3 package supports peak reflow temperatures up to 260°C, and the device is rated for soldering at 300°C for 10 seconds - fully compatible with automated PCB assembly lines using Pb-free paste and profiles.
ADM6346-46ARTZ-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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
ADM6346-46ARTZ-R7 FAQ
1.How can I place an order for ADM6346-46ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-46ARTZ-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 ADM6346-46ARTZ-R7 reliable?
The price and inventory of ADM6346-46ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-46ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-46ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-46ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-46ARTZ-R7?
ADM6346-46ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-46ARTZ-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 ADM6346-46ARTZ-R7?
For technical support, including ADM6346-46ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-46ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-46ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-46ARTZ-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 ADM6346-46ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-46ARTZ-R7?
All ADM6346-46ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-46ARTZ-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 ADM6346-46ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-46ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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