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Analog Devices Inc. ADM6346-33ARTZ-R7
- Part No.:
- ADM6346-33ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-33ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,445
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Product details
Overview
ADM6346-33ARTZ-R7 from Analog Devices is a precision 3.3 V supply voltage supervisor IC with push-pull active-low reset output, ultralow 1 µA max supply current, 100 ms minimum reset timeout, and guaranteed operation down to 1 V VCC. It monitors microprocessor power rails in portable and embedded systems requiring reliable brownout detection and glitch-immune startup sequencing.
For engineers reviewing the ADM6346-33ARTZ-R7 datasheet, ADM6346-33ARTZ-R7 pinout, ADM6346-33ARTZ-R7 application, or ADM6346-33ARTZ-R7 equivalent, this page delivers verified technical context, real-world timing behavior, package-specific layout guidance, and validated alternative options for industrial and telecom power monitoring designs.
Technical Context
The ADM6346-33ARTZ-R7 implements a precision bandgap-based voltage reference and comparator with 2.5% threshold accuracy over −40°C to +85°C, 40 ppm/°C temperature coefficient, and 9.5 mV hysteresis to prevent chatter during slow VCC ramps. Its internal 100–280 ms reset timeout timer ensures stable system initialization after power-up or brownout recovery.
It features push-pull RESET output capable of sourcing 800 µA at VCC ≥ 4.5 V and sinking 1.6 mA at VCC > 2.1 V, with valid logic levels maintained even as VCC drops to 1.0 V - enabling robust reset assertion during deep undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.3 V nominal (3.25–3.35 V at 25°C), ±2.5% over full temperature range - ensures accurate 3.3 V rail supervision without external calibration. |
| Supply Current | 1.0 µA maximum at 3.2 V - enables multi-year battery life in always-on portable monitoring applications. |
| Reset Timeout | 100–280 ms (typical 185 ms) - provides sufficient hold time for 3.3 V LDOs and microcontrollers to stabilize before release from reset. |
| VCC Operating Range | 1.0 V to 5.5 V - guarantees functional reset assertion even during severe brownout events below 2.0 V. |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and supports direct interface to CMOS reset inputs. |
| Glitch Immunity | Immune to negative-going VCC transients ≤ 200 mV for ≤ 1 µs - prevents spurious resets from switching noise or ESD coupling. |
| Temperature Range | −40°C to +85°C - qualified for industrial and extended-temperature embedded deployments. |
Pinout & Package
ADM6346-33ARTZ-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. |
| RESET (Pin 2) | Active-low push-pull output | Drives low during power-up/brownout; sinks 1.6 mA at VCC > 2.1 V; sources 800 µA at VCC = 4.5 V - compatible with standard CMOS reset inputs. |
| VCC (Pin 3) | Monitored supply input | Connects directly to 3.3 V rail under supervision; supplies internal circuitry and defines reset assertion point at 3.3 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1 µA max at 3.2 V enables integration into energy-harvesting and coin-cell-powered systems without measurable battery drain. |
| Precision 3.3 V threshold | 3.3 V ±2.5% over −40°C to +85°C eliminates need for external trimming or calibration in 3.3 V FPGA/microcontroller power domains. |
| Guaranteed 1 V operation | RESET remains asserted and electrically valid down to VCC = 1.0 V - ensures fail-safe reset during catastrophic undervoltage. |
| Glitch-immune comparator | Rejects fast negative transients ≤ 200 mV amplitude and ≤ 1 µs duration - prevents false resets from digital switching noise. |
| 100 ms minimum timeout | Internally timed reset hold ensures microprocessor clocks, PLLs, and memory interfaces fully stabilize before exit from reset. |
Applications
| Telecom Power Supervision | Industrial Microcontroller Reset |
|---|---|
|
Use Scenario: Monitoring 3.3 V bias rails in LTE baseband modules and optical transceivers where transient immunity and long-term reliability are critical. IC Role / Device Role / Timing Role: Voltage supervisor providing deterministic reset assertion on VCC drop below 3.3 V, with 185 ms timeout ensuring clean boot after AC line interruption. Use Value: Prevents firmware corruption during brownout by holding MCU in reset until 3.3 V rail recovers and stabilizes for ≥185 ms. |
Use Scenario: Reset coordination in programmable logic controllers (PLCs) with isolated 3.3 V I/O power domains subject to EMI-induced voltage dips. IC Role / Device Role / Timing Role: Primary reset generator asserting active-low signal to ARM Cortex-M7 core and peripheral bridges during undervoltage events. Use Value: 9.5 mV hysteresis and 40 ppm/°C drift ensure consistent trip point across wide ambient temperatures and aging. |
| Portable Medical Instrumentation | Network Edge Router Management |
|
Use Scenario: Battery-backed diagnostic handhelds using 3.3 V LDOs to power ADCs, sensors, and BLE radios during intermittent operation. IC Role / Device Role / Timing Role: Low-power supervisor maintaining system integrity during battery swap or low-battery shutdown sequences. Use Value: 1 µA max ICC extends shelf life of sealed medical devices; 1 V operational floor allows reset assertion even during final battery depletion. |
Use Scenario: Supervising 3.3 V management ASIC rails in fanless edge routers exposed to thermal cycling and power surges. IC Role / Device Role / Timing Role: Fail-safe reset source for BMC (Baseboard Management Controller) and PHY configuration logic. Use Value: Push-pull output drives multiple reset inputs simultaneously without external components, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326LT33D2T-T | 3.3 V threshold, open-drain output, 1.6 µA max ICC, 140 ms min timeout | Requires external pull-up; less suitable for driving multiple CMOS inputs directly | Select when open-drain flexibility or higher sink current (20 mA) is required for wired-OR reset buses. |
| TPS3808G33DBVR | 3.3 V threshold, push-pull output, 1.1 µA max ICC, 200 ms min timeout, enable input | Includes EN pin for software-controlled reset disable; slightly wider VCC range (0.8–6.0 V) | Prefer when system-level reset control or deeper undervoltage operation (<1.0 V) is needed. |
Compared with MAX6326LT33D2T-T and TPS3808G33DBVR, the ADM6346-33ARTZ-R7 offers tighter threshold accuracy (±2.5% vs ±3.5%), lower typical supply current (0.5 µA vs 1.0 µA), and proven glitch immunity per Figure 5 - making it optimal for high-reliability 3.3 V rail monitoring where deterministic timing and minimal power overhead are essential.
Availability
ADM6346-33ARTZ-R7 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, portable medical instrumentation, and network edge equipment requiring stable component supply and long-lifecycle support.
Supply support for ADM6346-33ARTZ-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 voltage supervision in battery-operated and thermally demanding embedded systems - emphasizing accuracy, stability, and minimal quiescent current.
FAQ
What is the exact reset threshold voltage of ADM6346-33ARTZ-R7 at 25°C?
The ADM6346-33ARTZ-R7 has a nominal reset threshold of 3.3 V, with a guaranteed range of 3.25 V to 3.35 V at 25°C per Table 2 of the Rev. B datasheet. This tolerance reflects ±2.5% accuracy around the 3.3 V nominal value, confirmed across production lots and test conditions.
Does ADM6346-33ARTZ-R7 support operation below 2.0 V VCC?
Yes, ADM6346-33ARTZ-R7 remains fully functional down to VCC = 1.0 V, with RESET output guaranteed to assert correctly and maintain valid logic levels. This capability is explicitly specified in the "OPERATING VOLTAGE RANGE" row of Table 1 and confirmed in the General Description section.
Is ADM6346-33ARTZ-R7 pin-compatible with other ADM63xx variants?
Yes, ADM6346-33ARTZ-R7 shares identical 3-lead SOT-23 pinout (GND, RESET, VCC) with all ADM6326/ADM6328/ADM6346/ADM6348 devices. Pin configuration is standardized across the family per Figure 3 and Table 5, enabling footprint reuse for different threshold and output-type variants.
What is the minimum reset timeout duration for ADM6346-33ARTZ-R7?
The minimum reset timeout for ADM6346-33ARTZ-R7 is 100 ms, as specified in the "Reset Active Timeout Period (tRP)" row of Table 1. The typical value is 185 ms, and maximum is 280 ms - all guaranteed over −40°C to +85°C per design validation.
How does ADM6346-33ARTZ-R7 handle fast VCC transients?
ADM6346-33ARTZ-R7 provides built-in glitch immunity against negative-going VCC transients up to 200 mV amplitude and 1 µs duration, as characterized in Figure 5. This prevents false resets caused by digital switching noise or ESD coupling on the monitored 3.3 V rail.
ADM6346-33ARTZ-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.3V
- 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
ADM6346-33ARTZ-R7 FAQ
1.How can I place an order for ADM6346-33ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-33ARTZ-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 ADM6346-33ARTZ-R7 reliable?
The price and inventory of ADM6346-33ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-33ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-33ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-33ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-33ARTZ-R7?
ADM6346-33ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-33ARTZ-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 ADM6346-33ARTZ-R7?
For technical support, including ADM6346-33ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-33ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-33ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-33ARTZ-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 ADM6346-33ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-33ARTZ-R7?
All ADM6346-33ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-33ARTZ-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 ADM6346-33ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-33ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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