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Analog Devices Inc./Maxim Integrated MAX6743XKWTD3
- Part No.:
- MAX6743XKWTD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6743XKWTD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,006
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Product details
Overview
The MAX6743XKWTD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 3.075V, VTH2 = 1.665V) and one user-adjustable RSTIN input (488mV threshold), push-pull active-low RESET output, no manual reset pin, and 150ms minimum reset timeout. It monitors I/O and core supplies in portable multivoltage systems requiring precise power sequencing and low-quiescent-current supervision.
For engineers reviewing the MAX6743XKWTD3 datasheet, MAX6743XKWTD3 pinout, MAX6743XKWTD3 application, or MAX6743XKWTD3 equivalent, this page delivers verified electrical parameters, SC70-5 package layout, real-world use cases in battery-powered equipment, and validated alternative parts for dual/triple-supply reset monitoring.
Technical Context
The MAX6743XKWTD3 implements a triple-supply supervisory architecture with independent comparators for VCC1 (primary I/O supply), VCC2 (secondary core supply), and RSTIN (adjustable third supply). Its internal 488mV reference enables monitoring down to 0.5V via external resistor dividers, while hysteresis (0.5%) ensures noise immunity on all monitored inputs.
Reset assertion is synchronized across all three inputs: RESET goes low when any falls below its threshold and remains low for ≥150ms after all return above threshold. The push-pull output drives directly to VCC1 without external pullup, supporting immediate µP reset signaling in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±2.5% - sets primary I/O supply reset point for 3.3V systems |
| VCC2 Threshold | 1.665V ±2.5% - sets secondary core supply reset point for 1.8V/1.6V ASICs |
| RSTIN Threshold | 488mV typical - enables monitoring of third supply (e.g., 1.2V, 0.9V) via external divider |
| Reset Timeout | 150ms min - guarantees µP reset hold time sufficient for full system initialization |
| Supply Current | 6µA max - enables multi-year battery life in always-on portable devices |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive cabin environments |
| Package | 5-pin SC70 - 2.0mm × 2.1mm footprint ideal for handheld PCBs with tight area budgets |
Pinout & Package
MAX6743XKWTD3 uses a 5-pin SC70-5 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for high-density portable PCB layouts. Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is VCC2, Pin 4 is RSTIN, Pin 5 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly; no external pullup needed; logic-high = deasserted |
| 2 - GND | Analog/digital ground reference | Single ground connection required; must be low-impedance path to system ground plane |
| 3 - VCC2 | Secondary supply voltage input | Monitors core supply (e.g., 1.8V, 1.6V); threshold fixed at 1.665V |
| 4 - RSTIN | Adjustable reset threshold input | Accepts external resistor divider; triggers reset when voltage < 488mV |
| 5 - VCC1 | Primary supply voltage input | Monitors I/O supply (e.g., 3.3V); threshold fixed at 3.075V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises VCC1 (3.075V), VCC2 (1.665V), and RSTIN (488mV) - eliminates need for three discrete supervisors |
| Push-pull RESET output | Eliminates external pullup resistor and associated board space; reduces BOM count by one passive component |
| 150ms reset timeout | Guarantees µP reset pulse width exceeds minimum requirement of ARM Cortex-M and Intel Quark processors |
| 6µA quiescent current | Enables >10-year battery life in coin-cell–powered IoT sensors using CR2032 (220mAh) |
| SC70-5 package | Reduces supervisor footprint by 65% vs. SOT23-6, critical for wearables and hearing aids |
Applications
| Portable Medical Sensors | Notebook Power Sequencing |
|---|---|
Use Scenario: Continuous glucose monitor with separate 3.3V I/O rail, 1.8V sensor core, and 1.2V analog front-end. IC Role / Device Role / Timing Role: MAX6743XKWTD3 asserts RESET until all three rails stabilize post-battery insertion, preventing firmware crash during brown-out. Use Value: 6µA supply current extends single-CR2032 battery life to 3.2 years; SC70-5 fits inside 12mm-diameter wearable housing. | Use Scenario: Dual-rail notebook motherboard where 5V-to-3.3V DC/DC must enable before 3.3V-to-1.8V core regulator. IC Role / Device Role / Timing Role: MAX6743XKWTD3 monitors 3.3V (VCC1), 1.8V (VCC2), and 1.2V (via RSTIN) to enforce strict power-up order and detect rail collapse during thermal throttling. Use Value: Factory-trimmed thresholds eliminate calibration labor; 150ms timeout matches Intel IMVP-7 spec for VRM sequencing. |
| Industrial Handheld Terminals | GPS Tracking Modules |
Use Scenario: Ruggedized barcode scanner operating from 3.7V Li-ion with 3.3V logic, 1.2V FPGA core, and 0.9V RF transceiver. IC Role / Device Role / Timing Role: MAX6743XKWTD3 supervises all three rails and triggers hard reset if any drops below threshold during vibration-induced connector bounce. Use Value: 0.5% hysteresis prevents false resets from supply ripple; -40°C to +85°C rating supports outdoor warehouse operation. | Use Scenario: Asset tracker powered by supercapacitor backup, requiring reliable reset during 3.3V I/O and 1.8V GPS chip brown-out. IC Role / Device Role / Timing Role: MAX6743XKWTD3 uses RSTIN to monitor supercap voltage (via 10:1 divider), asserting RESET before GPS lock loss occurs. Use Value: 488mV internal reference enables accurate 3.3V supercap monitoring with <1% error; 6µA draw minimizes self-discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply reset monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKTWD3 | Open-drain RESET output; requires external 10kΩ pullup; includes MR input | Suitable where manual reset button is required and board has spare GPIO for MR | Choose MAX6740XKTWD3 if system needs hardware reset button; MAX6743XKWTD3 preferred for minimal BOM count |
| TPS3808G33DBVR | Dual-supply only (VDD1/VDD2); no RSTIN; 3.3V fixed threshold; 200ms timeout | Limited to two-rail systems; lacks adjustable third input for custom voltage monitoring | Choose TPS3808G33DBVR only for simple 3.3V+1.8V systems without need for third-rail supervision |
Compared with MAX6740XKTWD3 and TPS3808G33DBVR, the MAX6743XKWTD3 uniquely combines push-pull RESET (no pullup), factory-trimmed dual thresholds, and RSTIN adjustability in SC70-5 - enabling compact triple-rail supervision without design compromises.
Availability
MAX6743XKWTD3 is available at Aetrix Electronics and suitable for portable medical sensors, notebook power sequencing, industrial handheld terminals, and GPS tracking modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6743XKWTD3 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 management, sensing, and interface applications in industrial, automotive, and consumer markets.
The MAX6736–MAX6745 family was engineered specifically for ultra-low-power, multivoltage microprocessor supervision in space-constrained portable electronics - delivering factory-trimmed accuracy, sub-10µA quiescent current, and SC70 packaging.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6743XKWTD3?
The MAX6743XKWTD3 has a factory-trimmed VCC1 reset threshold of 3.075V, with ±2.5% tolerance over -40°C to +85°C. This value is confirmed in Table 1 of the MAX6736–MAX6745 datasheet under suffix "TW", and applies specifically to the MAX6743XKWTD3 part number. The threshold is internally trimmed and does not require external calibration.
Does the MAX6743XKWTD3 include a manual reset (MR) input?
No, the MAX6743XKWTD3 does not include a manual reset input. Per the Selector Guide and Pin Description table, MAX6743 variants have RESET, GND, VCC2, RSTIN, and VCC1 pins - with no MR pin allocated. This distinguishes it from MAX6736–MAX6739 and MAX6740–MAX6742 families. The MAX6743XKWTD3 relies solely on supply voltage and RSTIN monitoring for reset assertion.
What is the function of the RSTIN pin on the MAX6743XKWTD3?
The RSTIN pin on the MAX6743XKWTD3 is an adjustable reset threshold input with a fixed internal reference of 488mV. When the voltage at RSTIN falls below 488mV, RESET is asserted. Users set the actual monitored voltage (e.g., 1.2V, 0.9V) using an external resistor divider. RSTIN draws only ±10nA, enabling high-impedance, low-power monitoring networks.
What package type and dimensions does the MAX6743XKWTD3 use?
The MAX6743XKWTD3 uses a 5-pin SC70-5 package measuring 2.0mm × 2.1mm with 0.65mm lead pitch. This is confirmed in the Ordering Information section and Pin Configurations diagram. The SC70-5 footprint is 65% smaller than standard SOT23-6, making it suitable for ultra-compact PCBs in wearables and hearing aids.
What is the guaranteed minimum reset timeout period for the MAX6743XKWTD3?
The MAX6743XKWTD3 has a guaranteed minimum reset timeout period of 150ms, as indicated by the "D3" suffix in its part number per Table 3 of the datasheet. This timeout begins after all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds and is valid over the full -40°C to +85°C operating temperature range.
MAX6743XKWTD3 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:
- -
MAX6743XKWTD3 FAQ
1.How can I place an order for MAX6743XKWTD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKWTD3 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 MAX6743XKWTD3 reliable?
The price and inventory of MAX6743XKWTD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKWTD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKWTD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKWTD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKWTD3?
MAX6743XKWTD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKWTD3 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 MAX6743XKWTD3?
For technical support, including MAX6743XKWTD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKWTD3 requirements.
6.How does Aetrix verify that MAX6743XKWTD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKWTD3 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 MAX6743XKWTD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKWTD3?
All MAX6743XKWTD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKWTD3, 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 MAX6743XKWTD3 part is unused and in its original packaging.
Return procedure for MAX6743XKWTD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6743XKWTD3 Tags
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MIC826SYMT-TR
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