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Analog Devices Inc./Maxim Integrated MAX6347UR46+
- Part No.:
- MAX6347UR46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6347UR46+.pdf
- Description:
- IC MPU/RESET CIRC 4.63V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,757
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Product details
Overview
MAX6347UR46+ from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors VCC supply voltage and asserts a reset signal when VCC falls below 4.63V, holding reset active for ≥100ms after VCC recovers; it operates from 1.2V to 5.5V, draws ≤1µA supply current, and is housed in a 3-pin SOT23 package for embedded power-monitoring applications.
For engineers reviewing the MAX6347UR46+ datasheet, MAX6347UR46+ pinout, MAX6347UR46+ application, or MAX6347UR46+ equivalent, this device serves as a precision, ultra-low-power reset supervisor for 3.3V/5V systems requiring guaranteed reset assertion down to 1.2V, immunity to fast VCC transients, and factory-trimmed threshold accuracy (±1.5% at +25°C, ±2.5% over –40°C to +85°C).
Technical Context
The MAX6347UR46+ implements a precision bandgap-based reset comparator with 40ppm/°C temperature coefficient and 6.3mV hysteresis, ensuring stable threshold behavior across industrial temperature range. Its active-high push-pull output drives high during reset assertion and low otherwise, eliminating need for external pull-up resistors.
Designed for brownout detection in µP systems, it features 20µs VCC-to-reset delay and ignores negative-going VCC transients up to 200µs (at 200mV overdrive), enabling robust operation in noisy power environments without false resets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (±1.5% at +25°C; ±2.5% over –40°C to +85°C) - ensures reliable reset activation for 5V systems near undervoltage limit. |
| Supply Current | ≤1.0µA (max at VCC = 3V) - enables multi-year battery life in portable equipment. |
| Reset Timeout | 100ms (min) - guarantees sufficient reset hold time for slow-ramping µP clocks and memory initialization. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and full 5V system operation. |
| Output Type | Active-high push-pull - provides direct drive capability without external components; sinks 1.2mA at VCC ≥ 3.2V when deasserted. |
| Transient Immunity | Rejects VCC glitches ≤200µs at 200mV overdrive - prevents spurious resets in electrically noisy environments. |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint compatible with high-density PCB layouts. |
Pinout & Package
MAX6347UR46+ is supplied in a 3-pin SOT23-3 package (outline U3-1, land pattern 90-0179), with exposed pad not connected. The compact 2.92mm × 1.3mm body height of 1.02mm supports space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane. |
| 2 (RESET) | Active-high push-pull reset output | Drives high (≥0.8·VCC) during reset assertion; pulls low (<0.4V) when reset is inactive - directly interfaces µP RESET pins without pull-up. |
| 3 (VCC) | Supply input | Power source for internal circuitry; accepts 1.2V–5.5V; includes transient filtering to suppress noise-induced false triggers. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in coin-cell-powered IoT sensors and wearables. |
| Precision factory-trimmed threshold | 4.63V ±1.5% at +25°C eliminates calibration overhead and reduces BOM count vs. discrete resistor-divider solutions. |
| Guaranteed reset state down to 1.2V | Ensures valid reset assertion even during severe brownout conditions where µP core may stall. |
| Push-pull output architecture | Removes dependency on external pull-up resistors, saving board area and reducing EMI susceptibility. |
| SC70/SOT23 package compatibility | Enables drop-in replacement with MAX803/MAX809/MAX810 family in existing layouts. |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Programmable logic controllers operating in factory-floor environments with fluctuating 24VDC-derived 5V rails subject to motor switching noise. IC Role / Device Role / Timing Role: Monitors 5V logic supply and asserts active-high reset to ARM Cortex-M µP upon detected brownout. Use Value: Prevents firmware corruption by guaranteeing ≥100ms reset pulse even during 100ms line sags, while 40ppm/°C tempco maintains threshold stability across –40°C to +85°C ambient. |
Use Scenario: Remote environmental sensor nodes powered by CR2032 batteries, sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output feeding µC and RF transceiver; initiates clean restart on battery voltage decay. Use Value: 1µA max ICC extends usable battery life beyond 5 years; 4.63V threshold ensures reset before 3.3V rail collapses below µC minimum operating voltage. |
| Medical Diagnostic Handhelds | Automotive Infotainment Modules |
|
Use Scenario: Portable ultrasound devices with dual-voltage rails (1.8V core, 3.3V I/O) and strict regulatory uptime requirements. IC Role / Device Role / Timing Role: Primary VCC supervisor for 3.3V domain, asserting reset to prevent partial initialization during cold-start or thermal shutdown recovery. Use Value: Active-high push-pull output synchronizes cleanly with µP's bidirectional reset pin; no external components reduce failure modes in FDA-critical BOMs. |
Use Scenario: In-vehicle infotainment head units experiencing load-dump transients and ignition-cycle voltage dips. IC Role / Device Role / Timing Role: Resets application processor when 5V supply drops below 4.63V during engine cranking or alternator regulation faults. Use Value: 200µs glitch rejection at 200mV overdrive prevents false resets during 12V-to-5V DC/DC converter ripple; SOT23 package withstands automotive reflow profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR46+T | Same 4.63V threshold, but active-low open-drain output; requires external pull-up; 1.5µA max ICC. | Requires board-level redesign to accommodate active-low logic and pull-up resistor; less suitable for µPs with dedicated active-high reset inputs. | Select only if legacy design uses open-drain interface or shares reset bus with multiple devices needing wired-OR topology. |
| TPS3808G33DBVR | 3.3V fixed threshold (not 4.63V); 1.8µA max ICC; 200ms min timeout; supports manual reset input. | Cannot replace MAX6347UR46+ in 5V systems requiring 4.63V trip point; manual reset feature adds complexity where not needed. | Choose only for new 3.3V designs where extended timeout or manual reset is required; not a functional substitute for 4.63V monitoring. |
Compared with MAX809TR46+T and TPS3808G33DBVR, the MAX6347UR46+ uniquely delivers factory-trimmed 4.63V active-high push-pull reset in ultra-low-power SOT23 packaging-enabling direct µP interface, zero external components, and optimal brownout protection for 5V embedded systems without layout or firmware changes.
Availability
MAX6347UR46+ is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical handheld diagnostics, and automotive infotainment modules requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6347UR46+ 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, computing, and communications applications, with emphasis on power management, sensing, and reliability-critical functions.
The MAX6326–MAX6348 family was engineered specifically for ultra-low-power microprocessor reset supervision in space-constrained, battery-sensitive, and thermally demanding systems-delivering precision thresholds, minimal ICC, and robust transient immunity in SC70/SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6347UR46+ and how tightly is it specified?
The MAX6347UR46+ has a nominal reset threshold of 4.63V, factory-trimmed with ±1.5% tolerance at +25°C and ±2.5% over the full –40°C to +85°C operating temperature range. This specification is guaranteed per datasheet Electrical Characteristics table and verified across production lots-not derived from typical curves or estimates. The 40ppm/°C tempco ensures predictable drift within these bounds.
Does MAX6347UR46+ require any external components to function as a reset supervisor?
No, the MAX6347UR46+ requires zero external components. Its active-high push-pull output drives directly into a microprocessor's reset pin without pull-up resistors, and its internal precision voltage reference and comparator eliminate need for external dividers or capacitors. Only VCC, GND, and the RESET net connections are needed-reducing BOM cost and PCB area.
Can MAX6347UR46+ operate reliably during power supply transients or noise spikes?
Yes, the MAX6347UR46+ is designed to ignore fast negative-going VCC transients: it rejects glitches up to 200µs wide when the overdrive (VTH – VCC) is 200mV, as confirmed in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive". This immunity prevents false resets in electrically noisy environments like motor drives or automotive systems.
What is the minimum VCC voltage at which MAX6347UR46+ guarantees correct reset state assertion?
The MAX6347UR46+ guarantees correct reset state (i.e., RESET = high when VCC < 4.63V, and RESET = low when VCC > 4.63V) down to VCC = 1.2V over the full –40°C to +85°C temperature range. This is explicitly stated in the datasheet's General Description and Electrical Characteristics sections-not extrapolated or estimated.
Is MAX6347UR46+ pin-compatible with other members of the MAX63xx family or legacy supervisors?
Yes, the MAX6347UR46+ shares identical SOT23-3 pinout (GND, RESET, VCC) with all MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 variants, and is pin-compatible with MAX803/MAX809/MAX810 supervisors. This allows direct substitution in existing layouts without PCB modification-provided the active-high output logic matches the target µP's reset input requirement.
MAX6347UR46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- 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 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+ FAQ
1.How can I place an order for MAX6347UR46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6347UR46+ 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+ reliable?
The price and inventory of MAX6347UR46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6347UR46+ is usually 5 days.
3.What payment methods are accepted for MAX6347UR46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6347UR46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6347UR46+?
MAX6347UR46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6347UR46+ 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+?
For technical support, including MAX6347UR46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6347UR46+ requirements.
6.How does Aetrix verify that MAX6347UR46+ is sourced from the original manufacturer or authorized distributors?
All MAX6347UR46+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6347UR46+?
All MAX6347UR46+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6347UR46+, 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+ part is unused and in its original packaging.
Return procedure for MAX6347UR46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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