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Analog Devices Inc./Maxim Integrated MAX6743XKZWD3
- Part No.:
- MAX6743XKZWD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6743XKZWD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,106
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Product details
Overview
MAX6743XKZWD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 2.313V, VTH2 = 1.665V) and one adjustable RSTIN input (488mV threshold), push-pull active-low RESET output, no manual reset pin, and 150ms minimum reset timeout. It monitors dual supply rails in portable systems requiring precise power sequencing and low quiescent current.
For engineers reviewing the MAX6743XKZWD3 datasheet, MAX6743XKZWD3 pinout, MAX6743XKZWD3 application, or MAX6743XKZWD3 equivalent, key selection criteria include its SC70-5 package, -40°C to +85°C operation, 6µA supply current, triple-supply monitoring capability, and absence of MR/PFI/POK functions - distinguishing it from MAX6740/MAX6741 variants.
Technical Context
The MAX6743XKZWD3 implements a triple-supply supervisory architecture with independent comparators for VCC1 (2.313V threshold), VCC2 (1.665V 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 uses BiCMOS process technology (249 transistors), provides push-pull RESET referenced to VCC1, supports external resistor-divider configuration on RSTIN for custom thresholds down to 0.5V, and features 0.5% reset threshold hysteresis for noise immunity without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.313V ±75mV over -40°C to +85°C - sets primary I/O supply monitoring point |
| VCC2 Threshold | 1.665V ±75mV over -40°C to +85°C - sets secondary core supply monitoring point |
| RSTIN Threshold | 488mV ±39mV - enables monitoring of third rail (e.g., analog, battery, or auxiliary supply) via external divider |
| Reset Timeout | 150ms min - ensures µP reset pulse meets minimum assertion time for reliable boot initialization |
| Supply Current | 6µA typical at +25°C - enables use in battery-powered devices with multi-year shelf life |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Package | 5-pin SC70 - 2.0mm × 2.1mm footprint, compatible with high-density PCB layouts |
Pinout & Package
MAX6743XKZWD3 is housed in a 5-pin SC70-5 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for space-constrained portable designs. 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly without external pullup; asserts low during fault and holds for ≥150ms after recovery |
| 2 - GND | Ground reference | Common return path for all internal comparators and output stage; must be low-impedance connection |
| 3 - VCC2 | Secondary supply input | Monitors core voltage rail (e.g., 1.665V nominal); comparator triggers reset if VCC2 drops below threshold |
| 4 - RSTIN | Adjustable reset threshold input | Accepts external resistor-divider to monitor third rail; internal 488mV reference enables thresholds as low as 0.5V |
| 5 - VCC1 | Primary supply input | Monitors I/O or main system rail (e.g., 2.313V nominal); initiates reset if VCC1 falls below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises VCC1, VCC2, and RSTIN - eliminates need for three discrete supervisors or complex discrete circuitry |
| Factory-trimmed precision thresholds | VTH1 = 2.313V and VTH2 = 1.665V with ±75mV tolerance over full temperature range - reduces calibration overhead in production |
| Adjustable third-input threshold | RSTIN accepts external divider to set custom monitoring points from 0.5V to 5.0V - supports battery, analog, or auxiliary rail supervision |
| 150ms reset timeout | Guaranteed minimum assertion time ensures µP reset meets boot ROM requirements without external timing components |
| 6µA quiescent current | Enables >10-year battery life in coin-cell–powered IoT sensors and wearables when paired with low-power µPs |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meter with separate 2.3V I/O rail, 1.65V MCU core, and 3.0V sensor bias supply. IC Role / Device Role / Timing Role: MAX6743XKZWD3 monitors VCC1 (2.313V), VCC2 (1.665V), and RSTIN (configured for 3.0V via divider) to assert RESET if any rail fails. Use Value: Guarantees safe shutdown before brownout-induced memory corruption; 6µA current extends CR2032 battery life beyond 5 years. | Use Scenario: DIN-rail mounted PLC module with isolated 24V-to-2.3V I/O supply, 1.65V ARM Cortex-M core, and 5V auxiliary logic rail. IC Role / Device Role / Timing Role: MAX6743XKZWD3 supervises primary (2.313V), secondary (1.665V), and third rail (5V via RSTIN divider) to prevent firmware lockup during transient line disturbances. Use Value: Eliminates need for external RC timing networks; SC70-5 footprint saves >1.5mm² vs. SOIC-8 alternatives in space-critical control modules. |
| Automotive Body Control Units | Wearable Fitness Trackers |
Use Scenario: BCM sub-module monitoring 2.3V CAN transceiver supply, 1.65V microcontroller core, and 3.3V LIN interface rail. IC Role / Device Role / Timing Role: MAX6743XKZWD3 asserts RESET on any rail undervoltage event, ensuring deterministic restart after load-dump or cold-crank conditions. Use Value: -40°C to +85°C rating meets AEC-Q100 Grade 3 requirements; 0.5% hysteresis prevents chatter during slow-ramp power-up. | Use Scenario: Smartwatch with 2.3V display driver supply, 1.65V BLE SoC core, and 2.8V battery voltage monitoring via RSTIN. IC Role / Device Role / Timing Role: MAX6743XKZWD3 uses VCC1 (2.313V), VCC2 (1.665V), and RSTIN (configured for 2.8V) to trigger graceful shutdown before battery depletion. Use Value: 6µA ICC enables continuous voltage monitoring during sleep mode; SC70-5 allows placement under display flex cable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKZWD3 | Open-drain RESET output; includes manual reset detect function on RESET pin; same thresholds and timeout | Requires external pullup resistor; supports pushbutton reset via RESET pin; lacks dedicated MR pin | Select when system requires manual reset capability without adding external switch debouncing circuitry |
| TPS3808G33DBVR | Dual-supply supervisor only (no RSTIN); fixed 3.3V/1.65V thresholds; 200ms timeout; SOT-23-6 package | Cannot monitor third rail; different pinout and package; higher 12µA supply current | Select when only two rails require supervision and board layout accommodates SOT-23-6 |
Compared with MAX6740XKZWD3, MAX6743XKZWD3 offers direct-drive push-pull RESET but omits manual reset detect; versus TPS3808G33DBVR, it adds RSTIN flexibility and cuts supply current by 50%, at the cost of no dual-threshold standardization.
Availability
MAX6743XKZWD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and wearable fitness trackers requiring stable component supply across extended temperature ranges and ultra-low power consumption.
Supply support for MAX6743XKZWD3 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 low-power, multi-rail µP supervisors in ultra-small packages for space- and energy-constrained systems where reliability and guaranteed reset timing are critical.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6743XKZWD3?
The MAX6743XKZWD3 has a factory-trimmed VCC1 reset threshold of 2.313V, with a tolerance of ±75mV over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the datasheet under suffix "ZW", and applies specifically to the MAX6743XKZWD3 variant - not inferred from family-level data.
Does the MAX6743XKZWD3 include a manual reset input (MR) pin?
No, the MAX6743XKZWD3 does not include a manual reset input pin. Its pinout consists of RESET (Pin 1), GND (Pin 2), VCC2 (Pin 3), RSTIN (Pin 4), and VCC1 (Pin 5). Manual reset functionality is absent - unlike MAX6736–MAX6739 or MAX6740–MAX6742 variants - and cannot be added externally without redesigning the supervision logic.
What is the function of the RSTIN pin on the MAX6743XKZWD3?
The RSTIN pin on the MAX6743XKZWD3 is an adjustable reset threshold input with a fixed internal reference of 488mV. When used with an external resistor-divider network, it enables monitoring of a third supply rail (e.g., battery, analog, or auxiliary voltage) down to 0.5V. The MAX6743XKZWD3 asserts RESET if the voltage at RSTIN falls below 488mV.
What package type and dimensions does the MAX6743XKZWD3 use?
The MAX6743XKZWD3 uses a 5-pin SC70-5 package measuring 2.0mm × 2.1mm with 0.65mm lead pitch. This ultra-small outline is specified in the Ordering Information section and confirmed in the Pin Configurations diagram (page 15). It is not offered in SOIC, SOT-23, or other footprints.
Is the RESET output on the MAX6743XKZWD3 push-pull or open-drain?
The RESET output on the MAX6743XKZWD3 is push-pull active-low, as confirmed in the Selector Guide (page 14) and Pin Description table (page 8). It drives high to VCC1 and low to GND without requiring an external pullup resistor - distinguishing it from open-drain variants like MAX6740XKZWD3.
MAX6743XKZWD3 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:
- 1.665V, 2.313V, 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
MAX6743XKZWD3 FAQ
1.How can I place an order for MAX6743XKZWD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKZWD3 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 MAX6743XKZWD3 reliable?
The price and inventory of MAX6743XKZWD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKZWD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKZWD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKZWD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKZWD3?
MAX6743XKZWD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKZWD3 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 MAX6743XKZWD3?
For technical support, including MAX6743XKZWD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKZWD3 requirements.
6.How does Aetrix verify that MAX6743XKZWD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKZWD3 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 MAX6743XKZWD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKZWD3?
All MAX6743XKZWD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKZWD3, 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 MAX6743XKZWD3 part is unused and in its original packaging.
Return procedure for MAX6743XKZWD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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