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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:2,255
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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 adjustable RSTIN input (488mV threshold), push-pull active-low RESET output, no manual reset pin, and 150ms minimum reset timeout period. It monitors dual supply rails (VCC1/VCC2) in portable, multivoltage embedded systems requiring precise power sequencing and fault detection.
For engineers reviewing the MAX6743XKSDD3+ datasheet, MAX6743XKSDD3+ pinout, MAX6743XKSDD3+ application, or MAX6743XKSDD3+ equivalent, key selection criteria include its SC70-5 package footprint, 6µA quiescent current, ±0.5% reset threshold hysteresis, -40°C to +85°C operating range, and compatibility with core/I/O voltage monitoring in battery-powered controllers and GPS equipment.
Technical Context
The MAX6743XKSDD3+ implements a triple-supply supervisory architecture with independent comparators for VCC1, VCC2, and RSTIN inputs, each referenced to a precision 488mV internal bandgap. Reset assertion occurs when any monitored voltage falls below its threshold, and the internal timer enforces a guaranteed 150ms minimum deassertion delay after all supplies recover.
Unlike dual-supply variants, this device omits MR and PFI/PFO pins-its pinout supports only VCC1, VCC2, RSTIN, RESET, and GND. The push-pull RESET output drives high to VCC1 (≥0.8×VCC1 at 800µA source) and low to ≤0.4V (at 3.2mA sink), eliminating external pull-up requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% - factory-trimmed for reliable I/O supply monitoring at 3.0V nominal rails |
| VCC2 Threshold | 2.188V ±2.5% - factory-trimmed for core supply monitoring at 2.2V nominal rails |
| RSTIN Threshold | 0.488V ±1.5% - fixed internal reference enabling external resistor-divider setup for third-rail monitoring down to 0.5V |
| Reset Timeout | 150ms min - ensures µP remains held in reset long enough for stable power-up across all three rails |
| Supply Current | 6µA typical - enables multi-year battery life in portable equipment without compromising supervision accuracy |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive-adjacent embedded applications |
| Package | 5-pin SC70 - 2.0mm × 1.25mm footprint saves PCB area vs. SOT-23 while maintaining hand-solderability |
Pinout & Package
MAX6743XKSDD3+ uses a 5-pin SC70-5 package with exposed pad (no thermal pad connection required). 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 via Maxim's official pin configuration diagram (page 15, top-view layout for MAX6740/MAX6743).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives directly to µP reset pin without external pull-up; asserts low on any threshold violation and holds for ≥150ms after recovery |
| 2 - GND | Analog/digital ground reference | Single ground connection shared by all comparators and output stage; requires low-impedance PCB return path |
| 3 - VCC2 | Secondary supply input (core rail) | Monitored at 2.188V threshold; must remain ≥1.0V for valid operation per datasheet ABS ratings |
| 4 - RSTIN | Adjustable reset input | Accepts external resistor-divider to monitor third voltage (e.g., analog supply); 10nA max input leakage minimizes divider power loss |
| 5 - VCC1 | Primary supply input (I/O rail) | Monitored at 2.925V threshold; powers internal circuitry and defines RESET high-level logic voltage |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1 (2.925V), VCC2 (2.188V), and RSTIN (0.488V reference) - eliminates need for three discrete supervisors |
| Factory-trimmed thresholds | ±2.5% accuracy over -40°C to +85°C - reduces system calibration overhead and improves first-pass yield |
| Push-pull RESET output | No external pull-up required - simplifies BOM and PCB layout while ensuring robust drive strength (800µA source / 3.2mA sink) |
| Ultra-low quiescent current | 6µA typical - extends battery runtime in always-on GPS trackers and handheld medical devices |
| SC70-5 package | 2.0mm × 1.25mm footprint - enables dense placement in space-constrained IoT edge nodes and wearables |
Applications
| Portable Medical Sensors | Notebook Power Management |
|---|---|
Use Scenario: Continuous glucose monitor with separate 3.0V I/O, 2.2V MCU core, and 1.8V analog sensor rail. IC Role / Device Role / Timing Role: Triple-supervisor asserting RESET until all three rails stabilize post-battery insertion or cold start. Use Value: Prevents firmware crash during asymmetric power-up; 150ms timeout ensures ADC reference settles before µP initialization. | Use Scenario: Dual-rail notebook motherboard where 3.0V I/O must power up before 2.2V CPU core. IC Role / Device Role / Timing Role: Monitors VCC1 (3.0V I/O) and VCC2 (2.2V core) with independent thresholds to enforce sequencing compliance. Use Value: Eliminates need for discrete RC timing circuits; factory-trimmed thresholds guarantee repeatable startup behavior across production units. |
| GPS Tracking Modules | Industrial PLC I/O Cards |
Use Scenario: Asset tracker powered by Li-SOCl₂ battery with 3.3V GPS module, 2.2V MCU, and 1.2V RF front-end bias. IC Role / Device Role / Timing Role: Uses RSTIN with resistor-divider to monitor 1.2V rail while VCC1/VCC2 cover main supplies. Use Value: 0.488V internal reference enables accurate low-voltage monitoring with <1µA divider current - preserves battery life over 10-year deployments. | Use Scenario: DIN-rail mounted PLC card with isolated 24V-to-5V DC/DC, 3.3V logic, and 2.2V FPGA core. IC Role / Device Role / Timing Role: Supervises primary 3.3V logic rail (VCC1), secondary 2.2V FPGA rail (VCC2), and auxiliary 1.8V configuration EEPROM rail (via RSTIN). Use Value: Push-pull RESET provides noise-immune reset signaling across noisy industrial backplanes without pull-up resistor tolerance drift. |
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 with internal 50kΩ pullup to VCC1; includes manual reset detect function on RESET pin | Requires external pullup for bidirectional µP reset I/O; supports pushbutton-initiated reset without dedicated MR pin | Select when system needs manual reset capability or interfaces with µPs having bidirectional reset pins |
| 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 | Select when only two rails require supervision and board space allows SOT-23-6 |
Compared with MAX6740XKSDD3+, the MAX6743XKSDD3+ offers push-pull drive and no manual reset dependency but lacks MR detect functionality; versus TPS3808G33DBVR, it adds third-rail monitoring and cuts supply current by half, at the cost of non-drop-in pin compatibility.
Availability
MAX6743XKSDD3+ is available at Aetrix Electronics and suitable for portable medical sensors, GPS tracking modules, notebook power management, and industrial PLC I/O cards requiring stable component supply across extended temperature ranges and low-power operation.
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 connectivity in demanding environments.
The MAX6736–MAX6745 family delivers ultra-low-power, multi-rail µP supervision in miniature SC70 packages, targeting battery-operated and space-constrained embedded systems where reliability and efficiency are critical.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6743XKSDD3+?
The MAX6743XKSDD3+ has a factory-trimmed VCC1 reset threshold of 2.925V, with ±2.5% tolerance over the full -40°C to +85°C operating temperature range. This value is defined by the "S" suffix in the part number per Table 1 of the datasheet and applies specifically to the MAX6743 variant with D3 timeout. The MAX6743XKSDD3+ does not support adjustment of this threshold.
Does MAX6743XKSDD3+ include a manual reset input (MR) pin?
No, the MAX6743XKSDD3+ does not include a manual reset input pin. Its pinout consists solely of RESET, GND, VCC2, RSTIN, and VCC1 - confirmed by the MAX6740/MAX6743 top-view diagram on page 15 of the datasheet. Manual reset functionality is absent; system-level reset initiation must be handled externally or via power cycling.
What is the function of the RSTIN pin on MAX6743XKSDD3+?
The RSTIN pin on MAX6743XKSDD3+ accepts an external resistor-divider network to monitor a third supply rail. Internally referenced to a precise 0.488V comparator threshold, it enables supervision of voltages as low as 0.5V. Input leakage is ≤10nA, allowing high-value resistors to minimize power consumption - a key feature for battery-powered applications using the MAX6743XKSDD3+.
What package type and dimensions does MAX6743XKSDD3+ use?
The MAX6743XKSDD3+ uses a 5-pin SC70-5 package measuring 2.0mm × 1.25mm × 0.95mm (max height), with standard lead-free termination (+T suffix). This compact outline is smaller than SOT-23-6 and supports automated placement and reflow, making it ideal for high-density PCBs in portable electronics where the MAX6743XKSDD3+ is deployed.
Is MAX6743XKSDD3+ compatible with 1.8V core supplies?
Yes, the MAX6743XKSDD3+ supports 1.8V core supplies via its VCC2 input, which is factory-trimmed to 2.188V - suitable for monitoring 1.8V rails with sufficient margin. The device operates with VCC2 as low as 1.0V (per Absolute Maximum Ratings), and its VCC2 threshold tolerance ensures reliable detection even under load-induced droop, a critical requirement when using the MAX6743XKSDD3+ in low-voltage embedded designs.
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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MIC826SYMT-TR
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