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Analog Devices Inc./Maxim Integrated MAX6743XKSVD3
- Part No.:
- MAX6743XKSVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6743XKSVD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,291
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Product details
Overview
The MAX6743XKSVD3 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 (488mV threshold), push-pull active-low RESET output, no manual reset pin, and no power-fail or POK functions. It operates from 1.2V to 5.5V supply range, draws only 6µA quiescent current, and delivers 150ms minimum reset timeout - ideal for space-constrained, battery-powered multivoltage systems requiring precise supply monitoring.
For engineers reviewing the MAX6743XKSVD3 datasheet, MAX6743XKSVD3 pinout, MAX6743XKSVD3 application, or MAX6743XKSVD3 equivalent, key selection considerations include its SC70-5 package footprint, triple-supply supervision capability with fixed + adjustable thresholds, push-pull reset drive strength, and compatibility with low-voltage core/I/O rails in portable controllers and embedded processors.
Technical Context
The MAX6743XKSVD3 implements a triple-supply supervisory architecture monitoring VCC1 (primary I/O rail), VCC2 (secondary core rail), and RSTIN (externally scaled third rail). Its internal comparators reference precision 488mV and factory-trimmed voltage thresholds, with hysteresis of 0.5% to reject noise-induced false resets.
Reset assertion occurs when any monitored voltage falls below its threshold; deassertion requires all three voltages to remain above their thresholds for the full 150ms timeout period. 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 need for external pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout Period | 150ms min - ensures µP remains held in reset long enough for stable power-up sequencing across all three rails |
| VCC1 Threshold (VTH1) | 2.925V (factory-trimmed) - matches common 3.0V/3.3V I/O supply rails with ±2.5% tolerance over -40°C to +85°C |
| VCC2 Threshold (VTH2) | 2.188V (factory-trimmed) - supports 2.2V/2.5V core supplies in dual-rail processors and ASICs |
| RSTIN Threshold | 0.488V (internal reference) - enables monitoring of down to ~0.5V supplies via external resistor divider |
| Supply Current | 6µA typical - minimizes battery drain in always-on portable equipment and IoT edge nodes |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive cabin-temperature applications |
| Package | 5-pin SC70 - 2.0mm × 1.25mm footprint saves PCB area vs. SOT23-6 or SOIC-8 alternatives |
Pinout & Package
MAX6743XKSVD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm height), optimized for ultra-compact PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives directly to µP reset pin without external pull-up; sinks 3.2mA / sources 800µA; referenced to VCC1 |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and output stage; must be low-impedance connection |
| 3 - VCC2 | Secondary supply monitor input | Monitors core voltage rail (e.g., 1.8V, 2.2V); asserts reset if VCC2 drops below 2.188V |
| 4 - RSTIN | Adjustable reset threshold input | Accepts externally scaled voltage; asserts reset when input falls below 0.488V reference |
| 5 - VCC1 | Primary supply monitor input & power rail | Supplies IC and monitors I/O rail (e.g., 3.0V, 3.3V); asserts reset if VCC1 drops below 2.925V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply supervision | Simultaneously monitors VCC1, VCC2, and RSTIN - eliminates need for multiple discrete supervisors in multirail SoC designs |
| Factory-trimmed dual thresholds | VTH1 = 2.925V and VTH2 = 2.188V - guaranteed accuracy avoids calibration overhead in production test |
| Adjustable third threshold | RSTIN accepts 0.488V reference - enables monitoring of custom voltages (e.g., 1.2V, 0.9V) using two external resistors |
| Push-pull RESET output | No external pull-up required - simplifies BOM and layout; compatible with bidirectional µP reset pins via 4.7kΩ series resistor |
| Ultra-low quiescent current | 6µA typical - extends battery life in always-on wearable and sensor nodes beyond 1 year on coin cell |
Applications
| Portable Medical Sensors | Notebook Power Management |
|---|---|
Use Scenario: Wearable ECG patch with separate 3.3V analog front-end, 1.8V digital controller, and 1.2V ADC reference supply. IC Role / Device Role / Timing Role: MAX6743XKSVD3 monitors all three rails and holds MCU in reset until all are stable post-battery insertion or wake-up. Use Value: Prevents firmware execution during brown-out; 6µA current ensures >2-year shelf life on CR2032 battery. |
Use Scenario: Dual-rail CPU platform requiring coordinated 3.3V I/O and 1.2V core power-up with optional 1.0V GPU rail monitoring. IC Role / Device Role / Timing Role: Supervises VCC1 (3.3V), VCC2 (1.2V), and RSTIN (scaled 1.0V) - asserts reset if any rail deviates during thermal throttling or load transients. Use Value: Eliminates need for three discrete supervisors; SC70-5 footprint fits tight space near CPU VRM. |
| Industrial PLC I/O Modules | POS Terminal Controllers |
Use Scenario: DIN-rail mounted I/O module with isolated 24V-to-5V/3.3V/1.8V conversion chain powering FPGA, interface ICs, and sensors. IC Role / Device Role / Timing Role: MAX6743XKSVD3 verifies stability of post-isolation DC rails before enabling FPGA configuration and communication interfaces. Use Value: 150ms timeout aligns with typical DC-DC startup delays; -40°C to +85°C rating ensures reliability in uncontrolled environments. |
Use Scenario: Retail point-of-sale terminal with 5V main rail, 3.3V display controller, and 1.8V secure element supply. IC Role / Device Role / Timing Role: Monitors VCC1 (5V), VCC2 (3.3V), and RSTIN (scaled 1.8V) to prevent corrupted transaction processing during AC brownouts. Use Value: Push-pull RESET drives legacy µP reset lines directly; low leakage at RSTIN enables high-resistor-divider networks for minimal standby power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKSVD3 | Open-drain RESET output; includes MR input; same thresholds and timeout | Requires external pull-up resistor; supports manual reset button; less drive strength than push-pull | Select when system needs manual reset capability or bidirectional µP reset I/O interface |
| 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 without external circuitry; larger footprint | Choose only if third-rail monitoring is unnecessary and SOT-23-6 is acceptable for layout |
Compared with MAX6743XKSVD3, MAX6740XKSVD3 adds manual reset but sacrifices drive strength and requires external pull-up, while TPS3808G33DBVR reduces monitoring capability to two rails and increases board area - making MAX6743XKSVD3 optimal for compact triple-rail integrity assurance.
Availability
MAX6743XKSVD3 is available at Aetrix Electronics and suitable for portable medical sensors, notebook power management, industrial PLC I/O modules, and POS terminal controllers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6743XKSVD3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6736–MAX6745 family was designed specifically for low-power, multivoltage microprocessor supervision in space- and energy-constrained systems - emphasizing precision thresholds, minimal quiescent current, and ultra-small packaging.
FAQ
What is the function of the RSTIN pin on the MAX6743XKSVD3?
The RSTIN pin on the MAX6743XKSVD3 serves as an adjustable reset threshold input with a precise 0.488V internal reference. When an external resistor divider scales a third supply voltage to fall below this threshold, the MAX6743XKSVD3 asserts its RESET output. This enables monitoring of non-standard rails like 1.2V, 0.9V, or even negative supplies - extending supervision beyond the fixed VCC1 and VCC2 inputs.
Does the MAX6743XKSVD3 support manual reset functionality?
No, the MAX6743XKSVD3 does not include a manual reset (MR) input pin. Unlike variants such as MAX6740XKSVD3 or MAX6736XKSVD3, the MAX6743XKSVD3 omits the MR pin entirely - it relies solely on voltage monitoring of VCC1, VCC2, and RSTIN to trigger reset. Systems requiring pushbutton-initiated reset must use a different variant or add external logic.
What are the exact reset threshold voltages for MAX6743XKSVD3?
The MAX6743XKSVD3 has two factory-trimmed reset thresholds: VTH1 = 2.925V for VCC1 (I/O rail) and VTH2 = 2.188V for VCC2 (core rail), both specified over -40°C to +85°C. Its RSTIN input uses a fixed 0.488V internal reference - meaning the actual monitored voltage is set by an external resistor divider scaling the target rail to this reference level.
Can the MAX6743XKSVD3 be used in automotive applications?
The MAX6743XKSVD3 is rated for -40°C to +85°C operation and meets industrial temperature requirements, but it is not AEC-Q200 qualified or specified for under-hood automotive use. It is suitable for automotive cabin-temperature applications such as infotainment displays or telematics modules where ambient temperature stays within its operating range and qualification beyond industrial grade is not mandated.
What is the purpose of the push-pull RESET output on the MAX6743XKSVD3?
The push-pull RESET output on the MAX6743XKSVD3 actively drives high (to VCC1) and low (to GND), eliminating the need for an external pull-up resistor. This simplifies design, improves noise immunity, and ensures robust reset signaling to microprocessors - especially those with bidirectional reset pins, where a series 4.7kΩ resistor suffices for safe interfacing without contention.
MAX6743XKSVD3 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
MAX6743XKSVD3 FAQ
1.How can I place an order for MAX6743XKSVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKSVD3 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 MAX6743XKSVD3 reliable?
The price and inventory of MAX6743XKSVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKSVD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKSVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKSVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKSVD3?
MAX6743XKSVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKSVD3 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 MAX6743XKSVD3?
For technical support, including MAX6743XKSVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKSVD3 requirements.
6.How does Aetrix verify that MAX6743XKSVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKSVD3 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 MAX6743XKSVD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKSVD3?
All MAX6743XKSVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKSVD3, 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 MAX6743XKSVD3 part is unused and in its original packaging.
Return procedure for MAX6743XKSVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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