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Analog Devices Inc./Maxim Integrated MAX6347UR46-T
- Part No.:
- MAX6347UR46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6347UR46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,199
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Product details
Overview
MAX6347UR46-T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors 4.63V power supplies and asserts a reset signal when VCC drops below the factory-trimmed threshold (4.63V ±2.5% over -40°C to +85°C), maintaining reset for ≥100ms after VCC recovers; it draws ≤1µA supply current and operates down to 1.2V VCC, making it suitable for battery-powered industrial controllers.
For engineers reviewing the MAX6347UR46-T datasheet, MAX6347UR46-T pinout, MAX6347UR46-T application, or MAX6347UR46-T equivalent, key selection criteria include its active-high push-pull RESET output, 4.63V precision reset threshold with 40ppm/°C tempco, immunity to fast VCC transients, and SOT23-3 packaging for space-constrained embedded systems.
Technical Context
The MAX6347UR46-T implements a precision bandgap-based voltage comparator with hysteresis (9.5mV) to detect VCC droop below 4.63V and trigger a clean active-high reset pulse. Its internal timing circuit guarantees a minimum 100ms reset timeout after VCC recovery, independent of external components.
Designed for ultra-low-power operation, the device maintains full functionality across VCC = 1.2V to 5.5V and features transient immunity-rejecting negative-going VCC glitches up to 200µs at 100mV overdrive-while delivering push-pull RESET output capable of sourcing ≥500µA at 0.8·VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% over -40°C to +85°C - ensures reliable brownout detection for 5V systems with margin |
| Supply Current | ≤1.0µA at VCC = 3V - enables multi-year operation in coin-cell–powered devices |
| Reset Timeout | 100ms to 280ms - provides sufficient hold time for µP initialization and memory stabilization |
| Output Type | Active-high push-pull - eliminates need for external pull-up resistor in most µP interfaces |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with wide-input systems |
| Tempco | 40ppm/°C - limits threshold drift to <±15mV over full temperature range |
| Transient Immunity | Rejects 200µs, 100mV VCC glitches - prevents false resets in noisy power environments |
Pinout & Package
MAX6347UR46-T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 0.95mm height, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion (VCC < 4.63V) and low otherwise; sinks ≤1.2mA when deasserted |
| 3 | VCC | Power supply input; accepts 1.2V–5.5V; internally powers comparator, timer, and output driver |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Enables drop-in replacement for 5V systems without calibration or external resistors |
| 100ms minimum reset timeout | Guarantees µP core and peripherals fully initialize before release, eliminating boot failures |
| 1µA max supply current | Reduces standby power budget impact in always-on monitoring applications |
| Push-pull active-high RESET | Simplifies interface to µPs requiring high-true reset (e.g., ARM Cortex-M series) |
| VCC down to 1.2V operation | Permits supervision during deep brownout conditions where other supervisors fail |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Microcontroller-based programmable logic controllers operating from 5V rails in factory-floor environments with variable line voltage and EMI. IC Role / Device Role / Timing Role: Supervisory IC asserting active-high reset to ARM-based controller during 5V supply sag or startup sequencing. Use Value: Prevents firmware corruption by ensuring reset remains asserted ≥100ms after 5V rail stabilizes, even under 100mV transients. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring multi-year shelf life and reliable cold-start behavior. IC Role / Device Role / Timing Role: Power-on supervisor monitoring 5V DC-DC output derived from Li-ion battery, triggering reset if voltage falls below 4.63V. Use Value: Ultra-low 1µA quiescent current extends battery life; 4.63V threshold aligns precisely with 5V system brownout guardband. |
| Smart Energy Meters | Automated Test Equipment |
Use Scenario: Revenue-grade electricity meters with isolated MCU and metrology ASIC powered from 5V auxiliary supply. IC Role / Device Role / Timing Role: Reset generator ensuring synchronized startup of metering SoC and communication module after AC power restoration. Use Value: Push-pull output eliminates external pull-up, reducing BOM count; 40ppm/°C tempco maintains accuracy across -25°C to +70°C field temperatures. |
Use Scenario: Rack-mounted ATE mainframes using 5V backplane power with strict reset timing requirements for FPGA configuration. IC Role / Device Role / Timing Role: Brownout detector asserting active-high reset to Xilinx Zynq SoC during 5V rail instability caused by load switching. Use Value: 20µs VCC-to-reset delay and 100ms timeout meet Xilinx's PS_POR_B timing spec; SOT23-3 footprint fits dense backplane layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR46-T | Same 4.63V threshold, identical SOT23-3 package and pinout, but rated only for 0°C to +70°C industrial range | Limited to commercial-temperature applications; not qualified for extended industrial (-40°C to +85°C) use | Select MAX6327UR46-T only if ambient operating temperature stays above -40°C |
| TPS3808G33DBVR | 3.3V fixed threshold, 350ms reset timeout, 2.5µA supply current, same SOT23-3 package but different pinout (RESET on Pin 2 vs. Pin 2 on MAX6347UR46-T) | Not a functional substitute for 4.63V monitoring; requires PCB redesign due to non-pin-compatible RESET placement | Choose only if system uses 3.3V supply and longer reset hold time is acceptable |
Compared with MAX6327UR46-T, the MAX6347UR46-T offers guaranteed -40°C to +85°C operation and tighter reset threshold tolerance; versus TPS3808G33DBVR, it provides precise 4.63V detection, lower quiescent current, and true pinout compatibility for existing Maxim-based designs.
Availability
MAX6347UR46-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6347UR46-T 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, and communications applications, with emphasis on reliability and integration.
The MAX6347UR46-T belongs to the MAX63xx family of ultra-low-power µP supervisory circuits, engineered specifically for robust power-monitoring in battery-critical and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6347UR46-T?
The MAX6347UR46-T has a factory-trimmed nominal reset threshold of 4.63V, with a tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). At +25°C, the threshold is specified as 4.560V (min), 4.630V (typ), and 4.699V (max), per Table 1 in the datasheet. This precision enables accurate brownout detection for 5V systems without external calibration.
Does the MAX6347UR46-T require any external components to function?
No, the MAX6347UR46-T requires no external components. It integrates the voltage reference, comparator, timer, and push-pull output driver into a single SOT23-3 package. Unlike open-drain supervisors, its active-high push-pull RESET output eliminates the need for an external pull-up resistor, simplifying design and reducing BOM count.
What is the supply current consumption of the MAX6347UR46-T at 3.3V and 25°C?
At VCC = 3.3V and TA = +25°C, the MAX6347UR46-T consumes ≤1.0µA typical supply current (ICC), with a maximum of 1.0µA guaranteed across temperature and voltage. This ultra-low quiescent current is critical for extending battery life in portable equipment and always-on monitoring applications.
Can the MAX6347UR46-T operate reliably during power supply transients?
Yes, the MAX6347UR46-T is designed to ignore fast negative-going VCC transients. The datasheet specifies immunity to glitches up to 200µs duration when the overdrive (VTH – VCC) is 100mV. This transient rejection prevents spurious resets in electrically noisy environments such as motor drives or switch-mode power supply proximity.
Is the MAX6347UR46-T pin-compatible with older Maxim reset ICs like the MAX809?
Yes, the MAX6347UR46-T is pin-compatible with the MAX809 series in SOT23-3 packaging. Both share identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments and electrical interface characteristics. However, the MAX6347UR46-T offers improved specs: lower supply current (1µA vs. 20µA), tighter threshold tolerance, and enhanced transient immunity.
MAX6347UR46-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- 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:
- 4.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6347UR46-T FAQ
1.How can I place an order for MAX6347UR46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6347UR46-T 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 MAX6347UR46-T reliable?
The price and inventory of MAX6347UR46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6347UR46-T is usually 5 days.
3.What payment methods are accepted for MAX6347UR46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6347UR46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6347UR46-T?
MAX6347UR46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6347UR46-T 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 MAX6347UR46-T?
For technical support, including MAX6347UR46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6347UR46-T requirements.
6.How does Aetrix verify that MAX6347UR46-T is sourced from the original manufacturer or authorized distributors?
All MAX6347UR46-T 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 MAX6347UR46-T meets industry standards.
7.What is the process for return or replacement of MAX6347UR46-T?
All MAX6347UR46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6347UR46-T, 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 MAX6347UR46-T part is unused and in its original packaging.
Return procedure for MAX6347UR46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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