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Analog Devices Inc./Maxim Integrated MAX6743XKRVD3
- Part No.:
- MAX6743XKRVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6743XKRVD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6743XKRVD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 3.075V, VTH2 = 2.313V) and one adjustable RSTIN input (488mV threshold), push-pull active-low RESET output, no manual reset pin, and 150ms minimum reset timeout period. It monitors primary I/O supply (VCC1), secondary core supply (VCC2), and an external voltage via RSTIN - ideal for multivoltage portable systems requiring precise power sequencing and fault detection.
For engineers reviewing the MAX6743XKRVD3 datasheet, MAX6743XKRVD3 pinout, MAX6743XKRVD3 application, or MAX6743XKRVD3 equivalent, this page delivers verified electrical parameters, SC70-5 package layout, real-world use cases in battery-powered controllers and dual-rail processors, and validated alternative parts with documented functional trade-offs.
Technical Context
The MAX6743XKRVD3 implements a triple-supply monitoring architecture with independent comparators for VCC1 (3.075V threshold), VCC2 (2.313V threshold), and RSTIN (488mV internal reference). Reset assertion occurs when any monitored voltage falls below its threshold and remains asserted for ≥150ms after all voltages recover.
It features a push-pull RESET output referenced to VCC1, eliminating need for external pull-up resistors, and integrates low-quiescent-current design (6µA typical ICC1 at 3.3V) optimized for battery longevity. No MR pin or POK/PFI functions are present - distinguishing it from MAX6741/MAX6742 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±75mV over -40°C to +85°C - ensures reliable reset assertion for 3.3V I/O rails under temperature variation |
| VCC2 Threshold | 2.313V ±75mV over -40°C to +85°C - matches common 2.5V or 2.3V core supply tolerances |
| RSTIN Threshold | 488mV ±19mV - enables monitoring of auxiliary supplies down to 0.5V using external resistor divider |
| Reset Timeout | 150ms min - guarantees µP reset hold time sufficient for full power stabilization in portable systems |
| Supply Current | 6µA typical at VCC1 = 3.3V - extends battery life in always-on supervisory applications |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive-adjacent embedded environments |
| Package | 5-pin SC70 - 2.0mm × 1.25mm footprint saves PCB area in space-constrained designs |
Pinout & Package
MAX6743XKRVD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm, 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, and Pin 5 is VCC1 - confirmed from Maxim's official pin configuration diagram for MAX6740/MAX6743.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly without external pull-up; sinks/source current per VOL/VOH specs |
| 2 - GND | Analog/digital ground reference | Common return path for all internal comparators and output stage; must be low-impedance |
| 3 - VCC2 | Secondary supply monitor input | Connects to core rail (e.g., 2.3V); triggers reset if voltage drops below 2.313V |
| 4 - RSTIN | Adjustable threshold monitor input | Accepts external voltage divider; asserts reset when input < 488mV |
| 5 - VCC1 | Primary supply monitor input | Connects to I/O rail (e.g., 3.3V); initiates reset if voltage drops below 3.075V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC1 (3.075V), VCC2 (2.313V), and RSTIN (488mV) - eliminates need for three discrete supervisors |
| Factory-trimmed precision thresholds | VTH1/VTH2 tolerances ≤±2.5% over full temp range - reduces system-level calibration overhead |
| Push-pull RESET output | No external pull-up required - simplifies BOM and improves noise immunity vs. open-drain alternatives |
| Ultra-low quiescent current | 6µA ICC1 at 3.3V - enables >10-year battery life in coin-cell–powered IoT edge nodes |
| SC70-5 package | 2.0mm × 1.25mm footprint - fits into tight spaces where SOIC-8 or SOT23-6 are prohibitive |
Applications
| Battery-Powered Multivoltage Controller | Dual-Rail Processor Power Sequencing |
|---|---|
Use Scenario: Portable medical sensor node with 3.3V I/O, 2.3V ARM Cortex-M core, and 1.8V ADC reference rail. IC Role / Device Role / Timing Role: MAX6743XKRVD3 monitors VCC1 (3.3V), VCC2 (2.3V), and RSTIN (derived from 1.8V rail) to assert RESET until all rails stabilize post-power-up. Use Value: Guarantees deterministic boot sequence and prevents firmware execution during brownout - critical for FDA-compliant device reliability. | Use Scenario: Industrial PLC module using dual-voltage FPGA requiring I/O power (3.3V) before core (2.3V). IC Role / Device Role / Timing Role: MAX6743XKRVD3 asserts RESET until both VCC1 and VCC2 exceed thresholds; RSTIN monitors auxiliary 1.8V configuration EEPROM supply. Use Value: Eliminates need for discrete timing RC networks or sequencer ICs - reduces component count by 3+ parts per board. |
| POS Terminal Power Integrity | GPS Module Voltage Monitoring |
Use Scenario: Battery-backed point-of-sale terminal with 3.3V display interface, 2.3V SoC core, and 3.0V SIM card rail. IC Role / Device Role / Timing Role: MAX6743XKRVD3 supervises VCC1 (3.3V), VCC2 (2.3V), and RSTIN (3.0V via divider) to prevent corrupted transactions during power transitions. Use Value: 150ms timeout ensures stable USB enumeration and secure element initialization before host handshake. | Use Scenario: Automotive-grade GPS tracker with 3.3V RF front-end, 2.3V baseband processor, and 2.8V GNSS antenna LNA supply. IC Role / Device Role / Timing Role: MAX6743XKRVD3 monitors VCC1 (3.3V), VCC2 (2.3V), and RSTIN (2.8V) to halt navigation firmware if any rail dips during cold cranking. Use Value: 6µA supply current minimizes parasitic drain on backup supercapacitor - extends cold-start operation by >48 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKRVD3 | Open-drain RESET output; includes MR input; same VTH1/VTH2/RSTIN thresholds | Requires external pull-up resistor; supports manual reset button integration | Select when board-level reset button or bidirectional µP reset I/O is required |
| TPS3808G33DBVR | Dual-supply only (VDD, VDD2); no RSTIN; 3.3V fixed VDD threshold; 1.2V to 5.5V VDD2 range | Lacks third-monitor capability; no adjustable input; higher 16µA ICC | Select for cost-sensitive dual-rail systems where RSTIN functionality is unnecessary |
Compared with MAX6743XKRVD3, MAX6740XKRVD3 adds manual reset but requires external pull-up and occupies identical SC70-5 footprint, while TPS3808G33DBVR reduces monitoring depth to two rails and increases supply current - making MAX6743XKRVD3 optimal for compact triple-rail integrity assurance.
Availability
MAX6743XKRVD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply across industrial temperature ranges and long-lifecycle production programs.
Supply support for MAX6743XKRVD3 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 connectivity in demanding industrial and portable applications.
The MAX6736–MAX6745 product line delivers ultra-low-power, multi-rail µP supervisors in miniature SC70 packages - engineered specifically for space-constrained, battery-operated systems needing guaranteed power-up sequencing and brownout protection.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6743XKRVD3?
The MAX6743XKRVD3 has a factory-trimmed VCC1 reset threshold of 3.075V, with tolerance of ±75mV (±2.5%) over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the Maxim datasheet under suffix "T" for VCC1 and "Z" for VCC2, forming the "TZ" combination encoded in the part number.
Does the MAX6743XKRVD3 include a manual reset (MR) input pin?
No, the MAX6743XKRVD3 does not include a manual reset (MR) input. Its pinout consists solely of RESET (pin 1), GND (pin 2), VCC2 (pin 3), RSTIN (pin 4), and VCC1 (pin 5). The MR function is absent - unlike MAX6736–MAX6739 or MAX6740/MAX6741 variants - making MAX6743XKRVD3 suitable for fully automatic supervision without user intervention.
What is the function of the RSTIN pin on the MAX6743XKRVD3?
The RSTIN pin on the MAX6743XKRVD3 is an adjustable reset threshold input with a precise 488mV internal reference. When the voltage applied to RSTIN falls below this level, the device asserts the RESET output. Users set custom monitoring thresholds (e.g., for 1.8V or 2.5V rails) using an external resistor divider network connected to RSTIN and GND.
What is the reset timeout period for the MAX6743XKRVD3, and how is it determined?
The MAX6743XKRVD3 has a minimum reset timeout period of 150ms, indicated by the "D3" suffix in its part number. This timeout begins after all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds and ensures the microprocessor remains held in reset long enough for complete power stabilization before release.
Is the RESET output of the MAX6743XKRVD3 push-pull or open-drain?
The RESET output of the MAX6743XKRVD3 is push-pull active-low. As confirmed in the Selector Guide and Pin Description section, MAX6743 belongs to the push-pull RESET group (alongside MAX6737/MAX6739/MAX6744/MAX6745), meaning it actively drives high and low without requiring an external pull-up resistor - simplifying circuit design and improving noise margin.
MAX6743XKRVD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.575V, 2.925V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX6743XKRVD3 FAQ
1.How can I place an order for MAX6743XKRVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKRVD3 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 MAX6743XKRVD3 reliable?
The price and inventory of MAX6743XKRVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKRVD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKRVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKRVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKRVD3?
MAX6743XKRVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKRVD3 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 MAX6743XKRVD3?
For technical support, including MAX6743XKRVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKRVD3 requirements.
6.How does Aetrix verify that MAX6743XKRVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKRVD3 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 MAX6743XKRVD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKRVD3?
All MAX6743XKRVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKRVD3, 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 MAX6743XKRVD3 part is unused and in its original packaging.
Return procedure for MAX6743XKRVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6743XKRVD3 Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
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