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Analog Devices Inc./Maxim Integrated MAX6743XKVDD3
- Part No.:
- MAX6743XKVDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6743XKVDD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
The MAX6743XKVDD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 3.075V, VTH2 = 2.313V) and one user-adjustable RSTIN input (488mV threshold), push-pull active-low RESET output, no manual reset pin, and no power-fail or POK functionality. It operates from 1.2V to 5.5V supply range, draws only 6µA quiescent current, and is used in multivoltage portable systems requiring precise, low-power supply monitoring and reliable reset assertion during brownout.
For engineers reviewing the MAX6743XKVDD3 datasheet, MAX6743XKVDD3 pinout, MAX6743XKVDD3 application, or MAX6743XKVDD3 equivalent, this page delivers verified electrical parameters, SC70-5 package layout, confirmed triple-supply supervision behavior, timeout timing (150ms min), and real-world substitution guidance - all extracted from Maxim's official documentation and validated against ordering suffix logic and pin-function tables.
Technical Context
The MAX6743XKVDD3 implements a triple-supply monitoring architecture: VCC1 (primary I/O rail) and VCC2 (secondary core rail) are monitored against fixed internal thresholds (3.075V and 2.313V respectively), while RSTIN provides a third adjustable monitor path referenced to a precision 488mV internal bandgap. Reset assertion occurs if any of these three inputs falls below its threshold, and RESET remains low for ≥150ms after all inputs recover.
Its push-pull RESET output is referenced to VCC1 and requires no external pullup; it guarantees valid logic levels across the full operating temperature range (–40°C to +85°C). The device lacks MR, PFI/PFO, and POK1 pins - confirmed by pin configuration diagrams and selector guide - making it functionally distinct from MAX6740/MAX6741/MAX6742 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout Period | 150ms minimum - ensures µP remains held in reset long enough for stable power recovery before boot sequence begins. |
| VCC1 Threshold (VTH1) | 3.075V ±75mV - factory-trimmed to monitor standard 3.3V I/O supplies with guaranteed margin against noise-induced false resets. |
| VCC2 Threshold (VTH2) | 2.313V ±75mV - precisely set for 2.5V or 2.3V core rails in dual-voltage processors, enabling independent core/I/O supervision. |
| RSTIN Threshold | 488mV typical - allows monitoring of additional rails (e.g., 1.2V, 1.8V) via external resistor divider; enables third-supply supervision without extra ICs. |
| Supply Current (ICC) | 6µA max - ultra-low quiescent draw extends battery life in portable equipment and eliminates thermal concerns in space-constrained designs. |
| Operating Temperature | –40°C to +85°C - industrial-grade rating suitable for automotive infotainment, industrial controllers, and outdoor IoT edge nodes. |
| Package | 5-pin SC70 - 2.0mm × 1.25mm footprint saves PCB area vs. SOT23; compatible with standard reflow profiles and automated assembly. |
Pinout & Package
MAX6743XKVDD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm height), optimized for high-density portable applications. Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is VCC2, Pin 4 is RSTIN, and Pin 5 is VCC1 - confirmed by "Pin Configurations" diagram on page 15 and "Pin Description" table on page 8 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly without external pullup; sinks/source capability supports bidirectional µP interfaces when combined with series resistor. |
| 2 - GND | Analog/digital ground reference | Single ground pin shared by all internal comparators and timer; must be connected to low-impedance system ground plane for noise immunity. |
| 3 - VCC2 | Secondary supply input (core rail) | Monitored against 2.313V threshold; supports 0.9V–3.3V range; enables independent core voltage supervision in dual-rail SoCs. |
| 4 - RSTIN | Adjustable reset threshold input | Accepts external resistor-divider to monitor third rail (e.g., 1.2V); 10nA input leakage permits high-value resistors, minimizing standby power loss. |
| 5 - VCC1 | Primary supply input (I/O rail) | Monitored against 3.075V threshold; powers internal circuitry; defines RESET output logic levels and serves as reference for RSTIN divider. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises VCC1 (3.075V), VCC2 (2.313V), and RSTIN (488mV) - eliminates need for three discrete supervisors or complex discrete solutions. |
| Factory-trimmed precision thresholds | VTH1 and VTH2 tolerances ≤±2.5% over –40°C to +85°C - ensures reliable reset assertion without calibration or trimming in production. |
| 150ms reset timeout | Guaranteed minimum delay prevents premature release during supply settling; matches typical DC/DC converter startup times. |
| 6µA supply current | Enables always-on supervision in battery-backed systems (e.g., RTC, memory retention) with negligible impact on shelf life. |
| SC70-5 package | Reduces board area by >40% vs. SOT23-5; compatible with 0.5mm pitch reflow; supports high-volume automated placement. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch monitors battery voltage, analog front-end supply (1.8V), and digital core (1.2V) while operating on coin-cell battery. IC Role / Device Role / Timing Role: MAX6743XKVDD3 asserts RESET if battery drops below 3.075V, analog rail falls below 2.313V, or core rail dips below 0.488V-derived threshold. Use Value: Prevents corrupted sensor data or firmware crash during brownout; 6µA current extends 2-year battery life. |
Use Scenario: DIN-rail mounted PLC module powers FPGA (1.2V core), I/O drivers (3.3V), and isolated comms (2.5V). IC Role / Device Role / Timing Role: MAX6743XKVDD3 monitors 3.3V I/O rail (VCC1), 2.5V comms rail (VCC2), and FPGA core (RSTIN via divider) - all with single IC. Use Value: Reduces BOM count by two supervisors; SC70 footprint fits tight I/O board spacing; 150ms timeout aligns with FPGA configuration time. |
| Automotive Infotainment Head Units | POS Terminal Power Management |
|
Use Scenario: Head unit uses 5V main, 3.3V MCU, and 1.1V GPU core; must survive cold-crank (4.5V dip) and load-dump transients. IC Role / Device Role / Timing Role: MAX6743XKVDD3 supervises 3.3V MCU rail (VCC1), 1.1V GPU rail (RSTIN), and 5V supply (VCC2 via divider) - all within spec limits. Use Value: Factory-trimmed thresholds reject <100µs transients per toc05 graph; -40°C to +85°C rating meets AEC-Q200 ambient requirements. |
Use Scenario: Retail POS terminal with 12V input, 5V logic, 3.3V display, and 1.8V secure element - powered from wall adapter with backup supercap. IC Role / Device Role / Timing Role: MAX6743XKVDD3 monitors 5V (VCC1), 3.3V (VCC2), and supercap voltage (RSTIN) to trigger graceful shutdown before data loss. Use Value: Adjustable RSTIN enables accurate supercap voltage tracking down to 0.5V; 6µA draw minimizes self-discharge during backup mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKVDD3 | Same pinout and thresholds, but open-drain RESET with internal 50kΩ pullup to VCC1 and integrated manual reset detect (MR function via RESET pin). | Supports pushbutton-initiated reset without dedicated MR pin; requires external pullup for bidirectional µP interface. | Select MAX6740XKVDD3 if manual reset capability is required and open-drain output is acceptable; MAX6743XKVDD3 preferred for direct push-pull drive. |
| TPS3808G33DBVR | Dual-supply supervisor (3.3V + adjustable) in SOT23-6; no RSTIN pin; 300ms timeout; 1.5µA current; different pinout and no VCC2 monitoring. | Lacks third-supply monitoring; requires external circuitry to supervise core rail; not pin-compatible or functionally equivalent. | Use TPS3808G33DBVR only if design can omit VCC2 supervision and accept longer timeout; MAX6743XKVDD3 remains superior for true triple-rail integrity. |
Compared with MAX6740XKVDD3 and TPS3808G33DBVR, the MAX6743XKVDD3 uniquely delivers factory-trimmed dual fixed thresholds plus RSTIN in a push-pull SC70 package - enabling compact, low-power triple-supply reset without compromise on drive strength or pin count.
Availability
MAX6743XKVDD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive infotainment head units, and POS terminal power management requiring stable component supply, long-term lifecycle support, and guaranteed factory-trimmed performance.
Supply support for MAX6743XKVDD3 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 power, sensing, and connectivity in demanding environments.
The MAX6736–MAX6745 family was engineered specifically for low-power, multivoltage microprocessor supervision in space-constrained portable and industrial systems - emphasizing ultra-low ICC, SC70 packaging, and flexible threshold options.
FAQ
What is the exact reset timeout period for MAX6743XKVDD3?
The MAX6743XKVDD3 has a guaranteed minimum reset timeout period of 150ms, with typical value of 225ms and maximum of 300ms (per Table 3 and Electrical Characteristics). This timing begins after all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds and ensures sufficient hold time for processor initialization.
Does MAX6743XKVDD3 include a manual reset (MR) input pin?
No, the MAX6743XKVDD3 does not feature a dedicated MR input pin. Its pinout (RESET, GND, VCC2, RSTIN, VCC1) confirms absence of MR - unlike MAX6736–MAX6739. Manual reset functionality is not supported; external reset initiation requires redesign or alternative part selection such as MAX6740XKVDD3.
What are the factory-trimmed voltage thresholds for MAX6743XKVDD3?
The MAX6743XKVDD3 has VTH1 = 3.075V for VCC1 (I/O rail) and VTH2 = 2.313V for VCC2 (core rail), per Tables 1 and 2 in the datasheet. These values are laser-trimmed during production and guaranteed over –40°C to +85°C with ±75mV tolerance - enabling robust supervision without external components.
Can MAX6743XKVDD3 monitor a 1.2V core supply?
Yes, the MAX6743XKVDD3 can monitor a 1.2V core supply using the RSTIN pin with an external resistor divider. Since RSTIN triggers at 488mV, a 1.2V rail can be scaled via R1/R2 network (e.g., R1 = 147kΩ, R2 = 100kΩ) to present 488mV at RSTIN when VCORE = 1.2V - enabling precise third-rail supervision.
Is MAX6743XKVDD3 RoHS-compliant and available in lead-free packaging?
Yes, MAX6743XKVDD3 is RoHS-compliant and offered in lead-free packaging. Per Ordering Information (page 1), lead-free versions are ordered by replacing "-T" with "+T" suffix (e.g., MAX6743XKVDD3+T); standard tape-and-reel packaging supports automated assembly and meets IPC/JEDEC moisture sensitivity level 1 requirements.
MAX6743XKVDD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6743XKVDD3 FAQ
1.How can I place an order for MAX6743XKVDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKVDD3 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 MAX6743XKVDD3 reliable?
The price and inventory of MAX6743XKVDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKVDD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKVDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKVDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKVDD3?
MAX6743XKVDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKVDD3 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 MAX6743XKVDD3?
For technical support, including MAX6743XKVDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKVDD3 requirements.
6.How does Aetrix verify that MAX6743XKVDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKVDD3 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 MAX6743XKVDD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKVDD3?
All MAX6743XKVDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKVDD3, 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 MAX6743XKVDD3 part is unused and in its original packaging.
Return procedure for MAX6743XKVDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6743XKVDD3 Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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V6340RSP3B+
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MCP120T-300I/TT
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MCP130T-315I/TT
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MCP120T-475I/TT
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