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HomeProductsIntegrated Circuits (ICs)PMIC - SupervisorsMAX6346UR33+T
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MAX6346UR33+T - Analog Devices Inc./Maxim Integrated

Manufacturer Part Number
MAX6346UR33+T
Manufacturer
Maxim Integrated
Allelco Part Number
98D-MAX6346UR33+T
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
12,510 pcs available, New & Original
Parts Description
IC SUPERVISOR 1 CHANNEL SOT23-3
Package
SOT-23-3
Data sheet
MAX6346UR33+T.pdf

Part Numbering Guide

Part Numbering System.pdf

PCN Obsolescence/ EOL

Cylindrical Battery Holders.pdf
RoHs Status
ROHS3 Compliant
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In stock: 12510

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Specifications

MAX6346UR33+T Tech Specifications
Analog Devices Inc./Maxim Integrated - MAX6346UR33+T technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc./Maxim Integrated - MAX6346UR33+T

Product Attribute Attribute Value
Manufacturer Maxim Integrated
Voltage - Threshold 3.3V
Type Simple Reset/Power-On Reset
Supplier Device Package SOT-23-3
Series -
Reset Timeout 100ms Minimum
Reset Active Low
Product Attribute Attribute Value
Package / Case TO-236-3, SC-59, SOT-23-3
Package Tape & Reel (TR)
Output Push-Pull, Totem Pole
Operating Temperature -40°C ~ 85°C (TA)
Number of Voltages Monitored 1
Mounting Type Surface Mount
Base Product Number MAX6346

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

How does the MAX6346UR33+T supervisor IC manage power-up sequencing in a 3.3V digital system, and what happens when the supply voltage drops below its 3.3V threshold?
The MAX6346UR33+T operates as a precision power-on reset supervisor for systems operating at 3.3V. When the input voltage rises above the 3.3V threshold, the device generates a valid reset signal after a brief delay, ensuring microcontrollers or FPGAs are not left in an undefined state during power ramp-up. If the supply dips below the threshold—even momentarily—the device activates a 100ms minimum reset pulse to prevent erratic behavior. This active-low output is delivered via a push-pull configuration, enabling direct drive of logic inputs without external pull-ups, simplifying board layout in space-constrained designs.
Can the MAX6346UR33+T be used in battery-powered applications, and how does its quiescent current affect overall system efficiency?
Yes, the MAX6346UR33+T is suitable for battery-powered devices due to its low power consumption. Although the datasheet does not explicitly list quiescent current, typical values for similar SOT-23 supervisor ICs in this voltage range are around 5–10 µA. At 3.3V operation over a full discharge cycle from 4.2V to 3.0V, this contributes minimal load to the battery, making it appropriate for portable or energy-sensitive applications where extended runtime is critical.
What are the key differences between the MAX6346UR33+T and a comparable open-drain supervisor like the MAX809T when interfacing with a microcontroller?
The primary distinction lies in output topology: the MAX6346UR33+T features a push-pull (totem pole) output that actively drives both high and low states, whereas the MAX809T uses open-drain requiring an external pull-up resistor. In a 3.3V system, the push-pull configuration eliminates the need for a discrete pull-up, reducing component count and improving noise immunity. However, if bidirectional communication or level shifting is required, the open-drain version may offer more flexibility. Both share similar thresholds and timeout characteristics, but the MAX6346UR33+T’s integrated drive strength can improve reset signal integrity under capacitive loads.
Is it acceptable to use the MAX6346UR33+T in automotive environments despite not being AEC-Q100 qualified?
While the MAX6346UR33+T is specified for industrial temperature ranges (-40°C to +85°C), it lacks formal automotive qualification such as AEC-Q100. In non-automotive applications within this range—such as industrial control panels or outdoor sensors—it is commonly used without issue. However, in safety-critical or mission-tolerant automotive subsystems (e.g., engine control units), additional reliability testing and redundancy should be considered. For standard consumer or general-purpose electronics, however, the part performs reliably within its stated operating conditions.
How should PCB layout be optimized when placing the MAX6346UR33+T near sensitive analog components?
To minimize noise coupling, place the MAX6346UR33+T at least 10 mm away from high-impedance analog nodes or clock lines. Route the VCC and GND traces with adequate width to reduce inductance and resistance, and ensure the bypass capacitor (typically 0.1µF ceramic placed within 5 mm of the IC) is positioned close to the power pin. Avoid routing the RESET line parallel to switching regulators or digital buses. Grounding should follow a star topology if multiple supervisors are present, with the MAX6346UR33+T tied directly to the main ground plane to maintain reference stability.
What is the maximum allowable voltage on the VCC pin of the MAX6346UR33+T, and could reverse polarity damage the device?
The absolute maximum rating for VCC is typically limited to slightly above the threshold voltage—often specified as up to 6V in many similar parts from Analog Devices. Exceeding this could compromise internal ESD protection diodes. More critically, applying reverse voltage (e.g., -0.3V) may forward-bias parasitic structures and cause latch-up or permanent damage. Always ensure proper power sequencing and consider adding a series Schottky diode for reverse polarity protection if the system might experience accidental reversal.
Does the 100ms minimum reset timeout of the MAX6346UR33+T guarantee sufficient holdup time for all microcontrollers?
Not universally. While 100ms provides adequate reset assertion for many common MCUs—including ARM Cortex-M0/M3 devices that typically require <50ms after stable supply—some ultra-low-power or deeply embedded processors may have longer internal stabilization sequences. For example, certain MSP430 variants recommend up to 200ms before executing code. In such cases, adding a secondary RC delay network at the reset pin or using a watchdog timer can supplement the supervisor’s timing to meet specific MCU requirements.
How does the Moisture Sensitivity Level (MSL) of 1 impact assembly and storage of boards containing the MAX6346UR33+T?
With an MSL of 1, the MAX6346UR33+T can be exposed indefinitely to ambient conditions without special handling prior to reflow soldering. This simplifies inventory management and reduces the risk of moisture-related defects during assembly. There is no requirement for baking before use, unlike parts rated MSL 2 or higher. However, standard IPC guidelines for handling surface-mount components still apply, including avoiding contamination and ensuring proper humidity control in cleanrooms if applicable.
Can the MAX6346UR33+T monitor a supply rail other than 3.3V by adjusting external components?
No, the MAX6346UR33+T has a fixed 3.3V threshold and cannot be externally tuned to monitor different voltages like 1.8V or 5V. To supervise a 5V rail, a separate supervisor with a matching threshold would be needed. Alternatively, a resistive divider could scale the 5V down before feeding it to the MAX6346UR33+T’s VCC pin, but this introduces accuracy risks due to tolerance stacking and temperature drift. Direct monitoring of non-3.3V rails is not recommended unless compensated through careful design validation.
Why choose the SOT-23-3 package over larger alternatives for the MAX6346UR33+T in compact designs?
The SOT-23-3 footprint offers a footprint of approximately 2.9 mm², ideal for space-constrained layouts such as wearables or handheld instruments. Its small size reduces parasitic capacitance and inductance, which improves transient response and noise margin. Despite its miniature form, the package supports standard JEDEC solder profiles and is fully compatible with automated pick-and-place processes. When combined with high-density PCBs, using the MAX6346UR33+T in SOT-23-3 allows designers to save valuable board real estate without sacrificing functionality.
How does the RoHS compliance status of the MAX6346UR33+T influence global market deployment?
As a ROHS3 compliant device, the MAX6346UR33+T contains no restricted substances beyond the original RoHS directives, including exemptions for lead-free solders and cadmium. This ensures compatibility with international regulations such as EU Directive 2011/65/EU and China’s Management Methods for Controlling Pollution by Electronic Information Products. Manufacturers deploying this supervisor across multiple regions—particularly in Europe, North America, and Asia—can avoid customs delays or product recalls associated with non-compliant materials.
What happens to the RESET output if the MAX6346UR33+T experiences rapid voltage transients near the threshold?
Rapid transients crossing the 3.3V threshold can cause brief, unintended resets. The device’s internal hysteresis—though not always specified—helps mitigate chatter by preventing immediate re-triggering upon return to nominal levels. For systems prone to glitches (e.g., switching regulators or inductive loads), adding a small RC filter (e.g., 1 kΩ + 0.1 µF) at the VCC input can dampen fast dips or spikes, providing cleaner reset signaling while maintaining response speed.

Parts with Similar Specifications

The three parts on the right have similar specifications to Analog Devices Inc./Maxim Integrated MAX6346UR33+T

Product Attribute MAX6346UR33-T MAX6346UR34+T MAX6346UR33+ MAX6346UR34+
Part Number MAX6346UR33-T MAX6346UR34+T MAX6346UR33+ MAX6346UR34+
Manufacturer Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated
Reset - - - -
Reset Timeout - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Type - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Voltage - Threshold - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Number of Voltages Monitored - - - -
Output - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C

MAX6346UR33+T Datasheet PDF

Download MAX6346UR33+T pdf datasheets and Analog Devices Inc./Maxim Integrated documentation for MAX6346UR33+T - Analog Devices Inc./Maxim Integrated.

Datasheets
MAX6326-28,46-48.pdf
Part Numbering Guide
Part Numbering System.pdf
PCN Obsolescence/ EOL
Cylindrical Battery Holders.pdf
Application Notes
Micropower Circuit Offers Automatic Shutdown and L.pdf
Environmental Information
Maxim Integrated REACH.pdf Red Phosphorous Certificate.pdf Maxim Integrated RoHS Cert.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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MAX6346UR33+T Image

MAX6346UR33+T

Analog Devices Inc./Maxim Integrated
98D-MAX6346UR33+T

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