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Analog Devices Inc./Maxim Integrated MAX6346XR43+
- Part No.:
- MAX6346XR43+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6346XR43+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
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Product details
Overview
MAX6346XR43+ from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit that monitors VCC supply voltage and asserts reset when VCC falls below 4.300V (±2.5% over temperature), with a minimum 100ms reset timeout after VCC recovery. It operates from 1.2V to 5.5V, draws ≤1.0µA at 3V, and is housed in a 3-pin SC70 package - ideal for battery-powered embedded controllers requiring reliable brownout protection.
For engineers reviewing the MAX6346XR43+ datasheet, MAX6346XR43+ pinout, MAX6346XR43+ application, or MAX6346XR43+ equivalent, this device delivers precision reset thresholding, transient immunity, and drop-in compatibility with legacy MAX809/MAX810 designs - critical when selecting supervisory ICs for portable instrumentation, industrial microcontrollers, and low-voltage power monitoring systems.
Technical Context
The MAX6346XR43+ implements a factory-trimmed bandgap-based reset comparator with 4.300V nominal threshold (±1.5% at +25°C, ±2.5% over −40°C to +85°C) and 9.5mV hysteresis. Its push-pull RESET output drives low (≤0.3V at 1.6mA) during fault and high (≥0.8·VCC) otherwise, eliminating external pull-up components.
It features ultra-low ICC (≤1.0µA typical at 3V), guaranteed correct state down to VCC = 1.2V, and immunity to fast VCC transients - validated by maximum transient duration vs. overdrive curves showing <200µs rejection for 100mV VTH–VCC excursions at room temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.300V ±2.5% (−40°C to +85°C); ensures reliable brownout detection for 3.3V/5V systems without external calibration. |
| Supply Current | ≤1.0µA at 3V; enables multi-year operation on coin-cell batteries in portable equipment. |
| Reset Timeout | 100ms minimum after VCC rise above threshold; satisfies µP power-on initialization timing requirements. |
| Output Type | Active-low push-pull; drives RESET directly without pull-up resistor, reducing BOM count and PCB area. |
| Operating Voltage | 1.2V to 5.5V; supports operation during deep brownout and full-system power sequencing. |
| Package | 3-pin SC70 (X3-2 outline); 1.25mm × 0.85mm footprint, compatible with high-density SMT assembly. |
| Tempco | 40ppm/°C; maintains threshold stability across industrial temperature range without drift compensation. |
Pinout & Package
MAX6346XR43+ uses a 3-pin SC70 package (outline X3-2, land pattern 90-0208). Pin 1 = GND, Pin 2 = RESET (active-low push-pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane for noise immunity. |
| 2 | RESET | Active-low push-pull output; sinks ≥1.6mA when asserted, sources ≥500µA when deasserted - directly interfaces µP reset pins. |
| 3 | VCC | Power supply input; accepts 1.2V–5.5V; powers internal circuitry and defines reset threshold reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.300V with ±1.5% accuracy at +25°C - eliminates manual calibration and reduces test time in production. |
| Ultra-low quiescent current | ≤1.0µA at 3V - extends battery life in always-on monitoring applications such as smart sensors and wearables. |
| Transient-immune comparator | Rejects VCC glitches <200µs wide at 100mV overdrive - prevents spurious resets during switching noise or ESD events. |
| No external components required | Integrated reset generator, voltage reference, and output driver - reduces bill-of-materials and layout complexity. |
| Guaranteed operation down to 1.2V | Validates correct reset assertion even during severe brownout conditions - critical for fail-safe embedded control. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require continuous voltage supervision during intermittent RF transmission and sensor activation. IC Role / Device Role / Timing Role: MAX6346XR43+ continuously monitors 3.3V rail and asserts reset if VCC drops below 4.3V due to battery sag or load switching. Use Value: Prevents firmware corruption during brownout by guaranteeing ≥100ms reset hold time, enabling safe state retention in nonvolatile registers. |
Use Scenario: Programmable logic controller backplanes with mixed 5V/3.3V domains need deterministic reset sequencing under noisy industrial power conditions. IC Role / Device Role / Timing Role: MAX6346XR43+ serves as primary VCC supervisor for ARM Cortex-M4-based I/O processors, asserting reset on 5V rail collapse. Use Value: Push-pull output drives reset bus directly without pull-up, simplifying interface to multiple µPs sharing common reset net. |
| Smart Energy Meters | Automotive Body Control Units |
Use Scenario: ANSI C12.22-compliant electricity meters operate from wide-input DC-DC converters subject to line transients and cold-cranking dips. IC Role / Device Role / Timing Role: MAX6346XR43+ supervises the 3.3V MCU supply, detecting undervoltage events caused by transformer saturation or rectifier failure. Use Value: 40ppm/°C tempco ensures stable 4.3V threshold across −40°C to +85°C ambient - meets ANSI C12.20 accuracy requirements. |
Use Scenario: BCM modules powered from vehicle battery (9V–16V) via LDO must survive load-dump and cold-crank events while maintaining MCU integrity. IC Role / Device Role / Timing Role: MAX6346XR43+ monitors post-LDO 3.3V rail; its 1.2V minimum operating voltage allows reset assertion even during 6V cold-crank dips. Use Value: Immunity to sub-200µs transients prevents false resets during alternator switching noise - improving system robustness per ISO 7637-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR43+T | Same 4.3V threshold, but higher ICC (2.5µA typ), no SC70 option (SOT23 only), ±2.5% tolerance over temp. | Limited to SOT23; less suitable for ultra-dense layouts where SC70 footprint is required. | Select MAX809TR43+T only if SOT23 is preferred and 1.5µA extra current is acceptable. |
| TPS3808G33DBVR | 4.3V threshold (±0.5% initial), lower ICC (0.8µA), but requires external capacitor for timeout adjustment and lacks guaranteed 1.2V operation. | Needs external RC for timing; not drop-in for fixed 100ms timeout designs. | Choose TPS3808G33DBVR only when adjustable timeout and tighter initial threshold tolerance are prioritized over simplicity. |
Compared with MAX809TR43+T and TPS3808G33DBVR, the MAX6346XR43+ uniquely combines SC70 packaging, guaranteed 1.2V operation, fixed 100ms timeout, and ≤1.0µA supply current - making it optimal for space-constrained, battery-sensitive, and fail-safe-critical applications where minimal external components are mandatory.
Availability
MAX6346XR43+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6346XR43+ 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, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX63xx family targets cost-sensitive, ultra-low-power microprocessor supervision - delivering integrated reset functionality with factory-trimmed thresholds, minimal external components, and robust transient immunity for embedded control systems.
FAQ
What is the exact reset threshold voltage of MAX6346XR43+ and how does it vary with temperature?
The MAX6346XR43+ has a nominal reset threshold of 4.300V at +25°C, with ±1.5% tolerance at room temperature and ±2.5% over the full −40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, meaning the threshold shifts by approximately ±0.034V across the industrial temperature span - verified in the Electrical Characteristics table and Typical Operating Characteristics plots.
Does MAX6346XR43+ require any external components to function as a reset supervisor?
No, the MAX6346XR43+ requires zero external components. Its internal bandgap reference, precision comparator, and push-pull output driver eliminate the need for pull-up resistors, timing capacitors, or trimming networks - confirmed in the General Description and Applications Information sections of the datasheet.
Can MAX6346XR43+ operate reliably during deep brownout conditions?
Yes, the MAX6346XR43+ is guaranteed to assert reset correctly down to VCC = 1.2V, and remains functional throughout the entire 1.2V–5.5V supply range. This capability is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables, ensuring fail-safe behavior even during severe undervoltage events.
What is the maximum transient duration that MAX6346XR43+ can ignore without generating a false reset?
At a 100mV VTH–VCC overdrive (i.e., VCC = 4.200V), the MAX6346XR43+ rejects transients up to ~200µs, as shown in Figure 4 ("Maximum Transient Duration vs. Reset Threshold Overdrive") of the datasheet. This immunity is designed into the comparator's response time and filtering architecture to suppress switching noise and ESD-induced glitches.
Is MAX6346XR43+ pin-compatible with older Maxim reset ICs like MAX809?
Yes, the MAX6346XR43+ shares identical pinout (GND–RESET–VCC), package dimensions, and electrical interface with MAX809/MAX810 series devices in SC70/SOT23 packages - confirmed in the Pin Configuration diagram and Selector Guide. It is a direct replacement for designs using those parts, requiring no PCB changes.
MAX6346XR43+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.3V
- 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:
- SC-70-3
MAX6346XR43+ FAQ
1.How can I place an order for MAX6346XR43+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6346XR43+ 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 MAX6346XR43+ reliable?
The price and inventory of MAX6346XR43+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6346XR43+ is usually 5 days.
3.What payment methods are accepted for MAX6346XR43+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6346XR43+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6346XR43+?
MAX6346XR43+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6346XR43+ 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 MAX6346XR43+?
For technical support, including MAX6346XR43+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6346XR43+ requirements.
6.How does Aetrix verify that MAX6346XR43+ is sourced from the original manufacturer or authorized distributors?
All MAX6346XR43+ 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 MAX6346XR43+ meets industry standards.
7.What is the process for return or replacement of MAX6346XR43+?
All MAX6346XR43+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6346XR43+, 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 MAX6346XR43+ part is unused and in its original packaging.
Return procedure for MAX6346XR43+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6346XR43+ Tags
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