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Analog Devices Inc./Maxim Integrated MAX6743XKSDD3
- Part No.:
- MAX6743XKSDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6743XKSDD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6743XKSDD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 2.925V, VTH2 = 2.188V) and one user-adjustable RSTIN input (threshold = 0.488V), push-pull active-low RESET output, no manual reset pin, and 150ms minimum reset timeout. It monitors dual supply rails (VCC1/VCC2) in portable multivoltage systems requiring precise power sequencing and fault detection.
For engineers reviewing the MAX6743XKSDD3 datasheet, MAX6743XKSDD3 pinout, MAX6743XKSDD3 application, or MAX6743XKSDD3 equivalent, this page delivers verified electrical parameters, SC70-5 package layout, real-world use cases in battery-powered equipment, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The MAX6743XKSDD3 implements a triple-supply monitoring architecture with independent comparators for VCC1 (primary I/O rail), VCC2 (secondary core rail), and RSTIN (externally adjustable rail). Its internal 0.488V reference enables monitoring down to 0.5V via resistor-divider networks, supporting low-voltage SoCs and FPGAs.
It features a push-pull RESET output referenced to VCC1, eliminating external pull-up requirements, and asserts reset when any monitored voltage falls below its threshold - with automatic timer restart on re-fall before timeout completion. The 150ms reset timeout (D3 suffix) is temperature-stable across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold (VTH1) | 2.925V ±2.5% (factory-trimmed; supports 3.0V/3.3V I/O rail supervision) |
| VCC2 Threshold (VTH2) | 2.188V ±2.5% (factory-trimmed; matches 2.2V/2.5V core supply rails) |
| RSTIN Threshold | 0.488V typical (enables monitoring of sub-1V supplies like 1.2V, 1.0V, or 0.9V via external divider) |
| Reset Timeout | 150ms min (D3 option; ensures reliable µP initialization after brownout recovery) |
| Supply Current | 6µA typical (ICC1 + ICC2 at VCC1=3.3V/VCC2=2.5V; critical for battery life in portable devices) |
| Operating Temp | –40°C to +85°C (industrial-grade range; validated for embedded controllers and GPS units) |
| Package | 5-pin SC70-5 (1.6mm × 1.6mm footprint; saves PCB area vs. SOT-23 in space-constrained designs) |
Pinout & Package
MAX6743XKSDD3 is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height), 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 per Maxim's Pin Configurations diagram (page 15) and Pin Description table (page 8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly without external pull-up; sinks 3.2mA @ VCC1 ≥4.25V; VOH ≥0.8×VCC1 |
| 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 | Monitors core rail (e.g., 2.2V FPGA core); triggers reset if <2.188V; supports 0.9V–3.3V range |
| 4 - RSTIN | Adjustable reset threshold input | Accepts external divider; asserts reset when <0.488V; input leakage <±10nA enables high-R networks |
| 5 - VCC1 | Primary supply monitor input | Monitors I/O rail (e.g., 3.0V interface); triggers reset if <2.925V; supports 1.8V–5.0V range |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC1 (I/O), VCC2 (core), and RSTIN (user-defined rail) - eliminates need for three discrete supervisors |
| Factory-trimmed precision thresholds | VTH1 = 2.925V & VTH2 = 2.188V with ±2.5% tolerance over temperature - ensures deterministic reset behavior without calibration |
| 0.488V internal reference for RSTIN | Enables accurate monitoring of sub-1V supplies (e.g., 1.2V, 1.0V, 0.9V) using standard 1% resistors - reduces BOM count |
| 150ms reset timeout (D3) | Guaranteed minimum assertion time prevents premature µP release during supply recovery transients |
| 6µA total supply current | Extends battery runtime in handheld medical devices and IoT sensors where quiescent power is critical |
| SC70-5 package | 1.6mm × 1.6mm footprint saves >40% board area vs. SOT-23-5 - ideal for wearables and compact modules |
Applications
| Portable Medical Sensors | Notebook Power Sequencing |
|---|---|
Use Scenario: Wearable ECG sensor with 3.0V I/O, 2.2V MCU core, and 1.2V analog front-end. IC Role / Device Role / Timing Role: MAX6743XKSDD3 supervises all three rails, asserting RESET until all rise above thresholds for 150ms. Use Value: Prevents MCU lockup during battery voltage sag; 6µA current extends 7-day battery life by >12% vs. discrete solutions. |
Use Scenario: Dual-rail notebook motherboard requiring controlled VCC1 (3.0V I/O) power-up before VCC2 (2.2V core). IC Role / Device Role / Timing Role: MAX6743XKSDD3 monitors both rails but does not provide POK output; used with external logic to gate VCC2 enable. Use Value: Ensures safe core activation only after stable I/O rail - avoids bus contention and data corruption during boot. |
| Industrial Handheld Terminals | GPS Tracking Modules |
Use Scenario: Ruggedized POS terminal operating from Li-ion battery (3.2–4.2V) and step-down DC/DC (2.2V core). IC Role / Device Role / Timing Role: MAX6743XKSDD3 uses RSTIN to monitor battery voltage via divider, triggering early warning reset before deep discharge. Use Value: Enables graceful shutdown and flash memory save before brownout - prevents filesystem corruption. |
Use Scenario: GPS module with 3.3V RF section, 2.5V baseband processor, and 1.8V GNSS receiver. IC Role / Device Role / Timing Role: MAX6743XKSDD3 configured with VCC1=3.3V, VCC2=2.5V, RSTIN monitoring 1.8V rail via 0.488V reference. Use Value: Guarantees synchronized reset across heterogeneous subsystems - eliminates cold-start timing mismatches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKSDD3 | Open-drain RESET output (no internal pull-up); includes MR input; same VTH1/VTH2/RSTIN thresholds | Requires external pull-up resistor; supports manual reset button; used where bidirectional µP reset pins exist | Select MAX6740XKSDD3 if system requires MR functionality or open-drain compatibility with legacy µP interfaces. |
| TPS3808G33DBVR | Dual-supply supervisor (not triple); fixed 3.3V/1.8V thresholds; 200ms timeout; SOT-23-6 package | Lacks RSTIN input - cannot monitor third rail; higher 12µA supply current; larger footprint | Choose TPS3808G33DBVR only for dual-rail designs where third-rail monitoring is unnecessary and TI supply chain preference applies. |
Compared with MAX6743XKSDD3, MAX6740XKSDD3 adds manual reset capability at the cost of external pull-up dependency, while TPS3808G33DBVR sacrifices triple-monitoring and ultra-low power for TI ecosystem alignment - making MAX6743XKSDD3 optimal for compact, battery-sensitive triple-rail systems.
Availability
MAX6743XKSDD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, notebook computers, GPS tracking modules, and controllers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6743XKSDD3 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 low-power, multivoltage microprocessor supervision in space- and energy-constrained portable electronics - emphasizing factory-trimmed accuracy, sub-µA quiescent current, and minimal footprint.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6743XKSDD3?
The MAX6743XKSDD3 has a factory-trimmed VCC1 reset threshold of 2.925V (±2.5%) over –40°C to +85°C, corresponding to the "S" suffix in Table 1. This value is laser-trimmed during production and does not require external adjustment - ensuring consistent 3.0V rail supervision across units and temperature.
Does MAX6743XKSDD3 include a manual reset input (MR)?
No, MAX6743XKSDD3 does not include a manual reset input. Per the Selector Guide (page 14) and Pin Description (page 8), MAX6743XKSDD3 omits the MR pin - unlike MAX6736–MAX6739. Its reset is triggered solely by VCC1, VCC2, or RSTIN falling below threshold, with no provision for external push-button reset initiation.
What is the function of the RSTIN pin on MAX6743XKSDD3?
The RSTIN pin on MAX6743XKSDD3 accepts an externally divided voltage and compares it to an internal 0.488V reference. When the divided voltage drops below 0.488V, RESET is asserted. This enables monitoring of any supply - including sub-1V rails like 1.2V or 0.9V - using two standard 1% resistors, with input leakage <±10nA preserving accuracy.
What package type and dimensions does MAX6743XKSDD3 use?
MAX6743XKSDD3 uses a 5-pin SC70-5 package measuring 1.6mm × 1.6mm × 0.9mm (height). Pin 1 is RESET, Pin 2 is GND, Pin 3 is VCC2, Pin 4 is RSTIN, and Pin 5 is VCC1 - matching the top-view diagram on page 15 of the datasheet and enabling high-density placement in compact PCBs.
How does the 150ms reset timeout (D3 suffix) behave during supply recovery?
The 150ms reset timeout on MAX6743XKSDD3 begins only after all monitored supplies (VCC1, VCC2, RSTIN) exceed their respective thresholds and remains active for the full duration. If any supply dips below threshold before timeout completes, the timer resets and restarts - ensuring robust immunity to supply bounce during brownout recovery.
MAX6743XKSDD3 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:
- 0.788V, 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
MAX6743XKSDD3 FAQ
1.How can I place an order for MAX6743XKSDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKSDD3 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 MAX6743XKSDD3 reliable?
The price and inventory of MAX6743XKSDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKSDD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKSDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKSDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKSDD3?
MAX6743XKSDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKSDD3 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 MAX6743XKSDD3?
For technical support, including MAX6743XKSDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKSDD3 requirements.
6.How does Aetrix verify that MAX6743XKSDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKSDD3 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 MAX6743XKSDD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKSDD3?
All MAX6743XKSDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKSDD3, 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 MAX6743XKSDD3 part is unused and in its original packaging.
Return procedure for MAX6743XKSDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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