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HomeProductsIntegrated Circuits (ICs)PMIC - SupervisorsMAX6346UR38
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MAX6346UR38 - Analog Devices Inc./Maxim Integrated

Manufacturer Part Number
MAX6346UR38
Manufacturer
Maxim Integrated
Allelco Part Number
98D-MAX6346UR38
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
47,025 pcs available, New & Original
Parts Description
IC SUPERVISOR 1 CHANNEL SOT23-3
Package
SOT-23-3
Data sheet
-
RoHs Status
 
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In stock: 47025
  • Unit Price: $2.74
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $2.74 $2.74
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

MAX6346UR38 Tech Specifications
Analog Devices Inc./Maxim Integrated - MAX6346UR38 technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc./Maxim Integrated - MAX6346UR38

Product Attribute Attribute Value
Manufacturer Maxim Integrated
Voltage - Threshold 3.8V
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 Bulk
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 Not applicable
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status Vendor Undefined
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

How does the MAX6346UR38 compare to other voltage supervisors in terms of threshold accuracy and reset timeout for battery-powered applications?
The MAX6346UR38 offers a fixed 3.8V threshold with typical accuracy of ±1.5% over the industrial temperature range, which is critical for maintaining stable power sequencing in low-voltage systems such as portable devices. With a minimum reset timeout of 100ms, it ensures sufficient delay for microcontrollers to complete initialization before asserting a reset signal. Compared to similar SOT-23-3 supervisors like the MAX809 or MCP100, the MAX6346 provides comparable precision but with an integrated push-pull output stage, eliminating the need for external pull-up resistors required by open-drain alternatives.
Can the MAX6346UR38 safely drive inductive loads, and what precautions should be taken during switching transients?
While the MAX6346UR38 features a push-pull totem-pole output capable of sourcing and sinking current up to 25mA, it is not designed for driving large inductive loads directly. Inductive kickback can damage the device if uncontrolled. For applications involving relay coils or solenoids, an external flyback diode must be placed across the load. Additionally, input decoupling capacitance should be minimized near the IC to avoid false resets due to transient noise, especially in environments with high electromagnetic interference.
What is the maximum allowable supply voltage for the MAX6346UR38, and how does this impact system design when interfacing with higher-voltage rails?
The absolute maximum supply voltage for the MAX6346UR38 is 6V, though the recommended operating range is 1.0V to 5.5V. This constraint limits its use in systems powered by batteries above 3.8V without additional regulation. When monitoring a higher-voltage rail (e.g., 5V from a linear regulator), designers must ensure the supervisor’s supply pin does not exceed 5.5V. One common approach is to power the supervisor from a separate derived rail using a resistive divider, though this reduces threshold accuracy due to loading effects.
How does the MAX6346UR38 handle power-up and power-down sequencing in multi-supply systems?
The MAX6346 continuously monitors the VCC input and generates an active-low reset signal whenever the voltage drops below the 3.8V threshold or rises above it during power-up. During power-down, the reset signal asserts within microseconds of the monitored rail falling below threshold, providing immediate protection against brownout conditions. On power-up, the 100ms minimum timeout allows downstream circuits to stabilize before releasing reset, ensuring reliable boot sequences in embedded systems such as IoT sensors or wearable devices.
Is the MAX6346UR38 suitable for automotive applications, and what environmental qualifications does it meet?
No, the MAX6346UR38 is not qualified for automotive use. It operates over -40°C to +85°C, which aligns with industrial standards but falls short of AEC-Q100 requirements for automotive-grade components. Its MSL rating of 3 indicates moderate sensitivity to moisture, requiring standard reflow soldering practices. For automotive designs requiring functional safety or extended temperature ranges, alternative parts from the MAX700 series or newer automotive-qualified supervisors should be considered.
How does the output configuration of the MAX6346UR38 affect PCB layout compared to open-drain supervisors?
Unlike open-drain supervisors that require external pull-up resistors, the MAX6346UR38’s push-pull output actively drives both high and low states without external components. This simplifies PCB routing and improves noise immunity in noisy environments. However, it introduces shoot-through current if both the supervisor and a microcontroller’s GPIO are driven simultaneously during power-up. Layout best practice includes placing a small series resistor (e.g., 10Ω–100Ω) between the supervisor output and the MCU reset pin to dampen ringing and prevent latch-up.
What is the typical quiescent current draw of the MAX6346UR38, and how does it influence battery life in energy-constrained designs?
The MAX6346UR38 consumes approximately 2.5µA of quiescent current under normal operation, making it suitable for battery-powered applications where leakage is a concern. Over a 10-year lithium coin cell life, this contributes negligibly to total drain compared to the cell’s self-discharge rate. In ultra-low-power systems like wireless sensors, minimizing supervisor current is essential; however, the MAX6346 remains competitive versus alternatives like the TPS3809, which may draw slightly more due to internal reference buffering.
Can multiple MAX6346UR38 units be cascaded to monitor multiple voltage rails in a complex system?
Yes, but with caveats. Each MAX6346UR38 monitors only one rail via its single threshold input. To supervise multiple rails, additional ICs must be used, each dedicated to a specific voltage domain. Cascading them on the same rail would create conflicting reset signals unless carefully managed with logic gates or ORing diodes. Designers should also consider whether a multi-channel supervisor like the MAX6804 or MAX809L-M offers better integration, cost, and timing coordination for systems with multiple power domains.

Parts with Similar Specifications

The three parts on the right have similar specifications to Analog Devices Inc./Maxim Integrated MAX6346UR38

Product Attribute MAX6346UR38-T MAX6346UR38+ MAX6346UR34+ MAX6346UR33-T
Part Number MAX6346UR38-T MAX6346UR38+ MAX6346UR34+ MAX6346UR33-T
Manufacturer Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated
Number of Voltages Monitored - - - -
Series - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Reset Timeout - - - -
Type - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Voltage - Threshold - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Reset - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Output - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package - Tape & Reel (TR) Tube Tape & Reel (TR)

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Shipment

Delivery Time

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Delivery Method

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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.
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Electrostatic Discharge Protection and Handling

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MAX6346UR38 Image

MAX6346UR38

Analog Devices Inc./Maxim Integrated
98D-MAX6346UR38

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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