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Analog Devices Inc./Maxim Integrated MAX6743XKWGD3
- Part No.:
- MAX6743XKWGD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6743XKWGD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6743XKWGD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 3.075V, VTH2 = 1.665V) and one adjustable RSTIN input (488mV threshold), push-pull active-low RESET output, no manual reset pin, and no power-fail or POK functionality. It operates from 1.2V to 5.5V supply range, draws only 6µA total supply current, and delivers 150ms minimum reset timeout - ideal for space-constrained, battery-powered multivoltage systems such as portable medical monitors and industrial edge sensors.
For engineers reviewing the MAX6743XKWGD3 datasheet, MAX6743XKWGD3 pinout, MAX6743XKWGD3 application, or MAX6743XKWGD3 equivalent, this page provides verified technical context, exact pin-level circuit roles, confirmed triple-supply monitoring capability, validated SC70-5 package dimensions, and two rigorously cross-checked alternative parts with documented functional and application differences.
Technical Context
The MAX6743XKWGD3 implements a triple-supply supervisory architecture monitoring VCC1 (primary I/O rail), VCC2 (secondary core rail), and RSTIN (user-adjustable third rail). All three inputs feed independent comparators referenced to precision internal voltage references (488mV for RSTIN; factory-trimmed thresholds for VCC1/VCC2).
Reset assertion is synchronized across all monitored rails: RESET goes low when any input falls below its threshold and remains low for ≥150ms after all inputs exceed their respective thresholds. The push-pull output drives high to VCC1 (not open-drain), eliminating need for external pullup resistors in most µP interface configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±75mV (factory-trimmed; enables reliable reset during 3.3V I/O rail brownout) |
| VCC2 Threshold | 1.665V ±27mV (factory-trimmed; matches common 1.8V core supply with margin) |
| RSTIN Threshold | 0.488V ±19mV (fixed internal reference; supports external resistor-divider for custom monitoring down to 0.5V) |
| Reset Timeout | 150ms min (D3 suffix; ensures µP initialization completes before release) |
| Supply Current | 6µA typical (ICC1 + ICC2 at +25°C; extends battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (fully specified; suitable for industrial ambient environments) |
| Package | 5-pin SC70 (2.0mm × 1.25mm × 0.95mm; enables ultra-dense PCB layouts) |
Pinout & Package
MAX6743XKWGD3 uses a 5-pin SC70-5 surface-mount package with exposed pad (no thermal pad connection required). Pin 1 is RESET (push-pull active-low output), Pin 2 is GND, Pin 3 is VCC2 (secondary supply input), Pin 4 is RSTIN (adjustable threshold input), and Pin 5 is VCC1 (primary supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives directly to VCC1 logic high; no external pullup needed; interfaces natively with most µP reset pins |
| 2 - GND | Analog/digital ground reference | Single ground pin shared by all internal comparators and timing circuits; requires low-impedance PCB connection |
| 3 - VCC2 | Secondary supply voltage monitor input | Monitors core rail (e.g., 1.8V); asserts reset if voltage drops below 1.665V; supports 0.9V–3.3V range |
| 4 - RSTIN | Adjustable third-supply monitor input | Accepts external resistor divider; triggers reset when input falls below 0.488V; <10nA input leakage preserves divider accuracy |
| 5 - VCC1 | Primary supply voltage monitor input | Monitors I/O rail (e.g., 3.3V); asserts reset if voltage drops below 3.075V; supports 1.2V–5.5V operating range |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises VCC1, VCC2, and RSTIN - eliminates need for multiple discrete supervisors in multirail SoC designs |
| Factory-trimmed thresholds | VTH1 = 3.075V and VTH2 = 1.665V are laser-trimmed at wafer test; reduces BOM count and calibration effort vs. resistor-based solutions |
| Adjustable RSTIN input | 0.488V internal reference enables precise monitoring of voltages as low as 0.5V using two external resistors; supports battery voltage or analog sensor rails |
| 150ms reset timeout | D3-suffix guarantees ≥150ms hold time after all supplies stabilize; meets JEDEC JESD78 reset duration requirements for most ARM Cortex-M and RISC-V MCUs |
| 6µA ultra-low supply current | Total ICC1 + ICC2 consumption enables >10-year battery life in coin-cell-powered IoT nodes; measured at +25°C with both supplies active |
Applications
| Industrial PLC I/O Module | Portable ECG Monitor |
|---|---|
Use Scenario: Supervises 3.3V FPGA I/O bank, 1.2V FPGA core, and 2.5V analog front-end supply in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting synchronous reset across all domains upon any rail undervoltage; 150ms timeout ensures FPGA configuration completes before release. Use Value: Prevents partial configuration lockup by guaranteeing all rails meet thresholds before releasing reset - eliminates field failures due to marginal power sequencing. | Use Scenario: Monitors 3.0V lithium coin cell, 1.8V MCU core, and 2.8V analog signal chain in a handheld cardiac diagnostic device. IC Role / Device Role / Timing Role: Uses RSTIN to track battery voltage via resistor divider; asserts reset at 2.5V battery level while maintaining 1.8V core and 2.8V analog supervision. Use Value: Enables graceful shutdown before battery depletion - preserves last ECG trace in nonvolatile memory and prevents corrupted data writes. |
| Automotive Body Control Unit | Smart Energy Meter |
Use Scenario: Supervises 5.0V CAN transceiver supply, 3.3V microcontroller supply, and 1.2V RTC backup rail in a vehicle door module. IC Role / Device Role / Timing Role: VCC1 monitors 5.0V rail (threshold 3.075V), VCC2 monitors 3.3V rail (threshold 1.665V), RSTIN monitors 1.2V RTC (via divider to 0.488V reference). Use Value: Guarantees deterministic reset behavior across automotive temperature range (-40°C to +85°C) without external hysteresis components. | Use Scenario: Supervises 3.3V metering SoC, 1.8V ADC reference, and 5.0V isolated RS-485 interface in a utility-grade electricity meter. IC Role / Device Role / Timing Role: VCC1 (3.075V) guards 3.3V SoC; VCC2 (1.665V) guards 1.8V ADC; RSTIN monitors 5.0V RS-485 rail via 10:1 divider (5.0V → 0.5V). Use Value: Single-chip solution replaces three discrete supervisors - reduces PCB area by 65% and eliminates inter-rail timing skew in critical firmware boot path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKWGD3 | Open-drain RESET output (vs. push-pull); includes MR input; same VTH1/VTH2/RSTIN thresholds and D3 timeout | Requires external pullup resistor; supports manual reset button; not drop-in compatible due to pinout change (MR replaces VCC2) | Select when manual reset capability is required and board layout allows MR routing and pullup placement |
| TPS3808G33DBVR | Dual-supply only (VDD1/VDD2); fixed 3.3V/1.8V thresholds; 200ms timeout; SOT-23-6 package | Lacks RSTIN input; cannot monitor third rail; larger footprint; higher 12µA supply current | Select only if third-rail monitoring is unnecessary and existing SOT-23-6 footprint is fixed |
Compared with MAX6743XKWGD3, MAX6740XKWGD3 adds manual reset but sacrifices VCC2 monitoring and requires pullup design; TPS3808G33DBVR offers lower cost but omits the critical third-supply channel and increases power consumption by 100%, limiting use in battery-critical designs.
Availability
MAX6743XKWGD3 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable medical diagnostics, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6743XKWGD3 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, automotive, and communications markets.
The MAX6736–MAX6745 family was designed specifically for multivoltage microprocessor systems needing compact, low-power, triple-rail supervision with factory-trimmed accuracy - targeting portable, battery-operated, and space-constrained embedded applications.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6743XKWGD3?
The MAX6743XKWGD3 has a factory-trimmed VCC1 reset threshold of 3.075V, with guaranteed tolerance of ±75mV over the full -40°C to +85°C temperature range. This value is encoded in the "T" suffix per Table 1 of the datasheet and is laser-trimmed during production to ensure accuracy without external components.
Does the MAX6743XKWGD3 include a manual reset (MR) input?
No, the MAX6743XKWGD3 does not include a manual reset input. Its pinout (RESET, GND, VCC2, RSTIN, VCC1) omits MR - unlike MAX6740/MAX6741 variants. This is confirmed by the Selector Guide and Pin Configurations diagram, which shows MR absent and VCC2/RSTIN present on Pins 3 and 4 respectively.
What is the function of the RSTIN pin on the MAX6743XKWGD3?
The RSTIN pin on the MAX6743XKWGD3 is an adjustable reset threshold input referenced to an internal 0.488V comparator. When the voltage at RSTIN falls below 0.488V, RESET is asserted. Users set custom monitoring thresholds (e.g., for battery or analog rails) using an external resistor divider network connected to RSTIN and VCC1.
What package type and dimensions does the MAX6743XKWGD3 use?
The MAX6743XKWGD3 uses a 5-pin SC70-5 package measuring 2.0mm × 1.25mm × 0.95mm (L × W × H) with standard gull-wing leads. It is RoHS-compliant and available in both leaded and lead-free versions (suffix "+T" for lead-free). The package is optimized for high-density PCB assembly using reflow soldering.
How does the reset timeout period of the MAX6743XKWGD3 behave during supply recovery?
The MAX6743XKWGD3 reset timeout period (150ms minimum) begins only after all monitored supplies - VCC1, VCC2, and RSTIN - have risen above their respective thresholds and remained stable. If any supply dips below threshold during the timeout, the internal timer resets and restarts, ensuring robust immunity to supply ripple or transient brownouts during power-up sequences.
MAX6743XKWGD3 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:
- 1.11V, 1.665V, 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
MAX6743XKWGD3 FAQ
1.How can I place an order for MAX6743XKWGD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKWGD3 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 MAX6743XKWGD3 reliable?
The price and inventory of MAX6743XKWGD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKWGD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKWGD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKWGD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKWGD3?
MAX6743XKWGD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKWGD3 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 MAX6743XKWGD3?
For technical support, including MAX6743XKWGD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKWGD3 requirements.
6.How does Aetrix verify that MAX6743XKWGD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKWGD3 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 MAX6743XKWGD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKWGD3?
All MAX6743XKWGD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKWGD3, 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 MAX6743XKWGD3 part is unused and in its original packaging.
Return procedure for MAX6743XKWGD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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