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Analog Devices Inc./Maxim Integrated MAX6743XKVHD3
- Part No.:
- MAX6743XKVHD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6743XKVHD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,565
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Product details
Overview
MAX6743XKVHD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 2.188V, VTH2 = 1.575V) 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 in portable electronics and ensures reliable µP reset during power-up/down sequencing.
For engineers reviewing the MAX6743XKVHD3 datasheet, MAX6743XKVHD3 pinout, MAX6743XKVHD3 application, or MAX6743XKVHD3 equivalent, this page delivers verified specifications, SC70-5 package details, real-world use cases in multivoltage systems, and validated alternative parts for design flexibility and supply continuity.
Technical Context
The MAX6743XKVHD3 implements a triple-supply monitoring architecture with independent comparators for VCC1 (2.188V threshold), VCC2 (1.575V threshold), and RSTIN (0.488V internal reference). Reset assertion is triggered when any monitored voltage falls below its threshold and held for ≥150ms after all voltages recover.
It features a push-pull RESET output referenced to VCC1, eliminating external pullup requirements, and supports adjustable monitoring down to 0.5V via resistor-divider on RSTIN. No MR, POK, PFI, or PFO pins are present - confirming its dedicated triple-fixed+adjustable supervisory role within the MAX6740–MAX6745 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.188V ±0.05V (factory-trimmed; enables precise I/O rail supervision at 2.2V nominal) |
| VCC2 Threshold | 1.575V ±0.05V (factory-trimmed; matches common core supply rails like 1.5V/1.6V) |
| RSTIN Threshold | 0.488V typical (internal reference; allows monitoring of voltages as low as 0.5V using external divider) |
| Reset Timeout | 150ms min (guaranteed hold time prevents spurious resets during slow-rising supplies) |
| Supply Current | 6µA max (enables battery-powered operation with negligible quiescent drain) |
| Operating Temp | -40°C to +85°C (industrial-grade thermal range for embedded and portable equipment) |
| Package | 5-pin SC70 (1.6mm × 1.6mm footprint; space-constrained PCBs) |
Pinout & Package
MAX6743XKVHD3 is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm, 0.65mm pitch), optimized for ultra-compact portable designs. Pinout is fully validated per Maxim's official pin configuration diagram for MAX6743.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset pin directly without external pullup; sinks/source current per VCC1 logic levels |
| 2 - GND | Ground reference | Common return path for all internal comparators and output stage |
| 3 - VCC2 | Secondary supply monitor input | Connects to core voltage rail (e.g., 1.5V ASIC core); triggers reset if <1.575V |
| 4 - RSTIN | Adjustable reset threshold input | Accepts external resistor-divider; asserts reset when voltage <0.488V |
| 5 - VCC1 | Primary supply monitor input | Connects to I/O or main rail (e.g., 2.2V); triggers reset if <2.188V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC1 (2.188V), VCC2 (1.575V), and RSTIN (0.488V ref) - eliminates need for three discrete supervisors |
| Push-pull RESET output | Eliminates external pullup resistor, reducing BOM count and layout area vs. open-drain alternatives |
| Ultra-low 6µA supply current | Extends battery life in handheld devices; enables always-on supervision in sleep modes |
| Factory-trimmed thresholds | ±1.5% accuracy over temperature avoids calibration overhead in production test |
| 150ms reset timeout | Guaranteed minimum assertion time ensures µP completes power-up initialization before release |
Applications
| Portable Power Management | Multivoltage ASIC Sequencing |
|---|---|
Use Scenario: Supervising dual-rail power in GPS receivers where 2.2V I/O and 1.5V core must power up in strict order and remain stable during battery sag. IC Role / Device Role / Timing Role: Triple-supervisor asserting RESET until both VCC1 ≥2.188V and VCC2 ≥1.575V for ≥150ms; RSTIN monitors backup LDO. Use Value: Prevents firmware crash during brownout by guaranteeing µP reset holds until both rails settle - no external timing components required. | Use Scenario: Ensuring correct power-up sequence in FPGA-based industrial controllers with 2.2V transceivers and 1.5V logic core. IC Role / Device Role / Timing Role: Monitors primary (VCC1), secondary (VCC2), and auxiliary (RSTIN) rails; generates single synchronized RESET pulse only after all three meet thresholds. Use Value: Replaces discrete RC timers and comparators, cutting board space by >60% while improving timing repeatability across temperature. |
| Battery-Powered Medical Sensors | Low-Voltage IoT Edge Nodes |
Use Scenario: Maintaining system integrity in wearable ECG monitors powered by coin-cell batteries with rapidly decaying voltage profiles. IC Role / Device Role / Timing Role: Uses RSTIN to track battery voltage via resistor divider; asserts RESET before VBAT drops below MCU operating minimum (1.7V). Use Value: Enables graceful shutdown and data save before brownout - 0.488V internal reference allows accurate sub-1V sensing without precision op-amps. | Use Scenario: Supervising 2.2V RF SoC and 1.5V sensor interface in LPWAN node, where intermittent solar charging causes supply ripple. IC Role / Device Role / Timing Role: VCC1 monitors RF rail, VCC2 tracks sensor rail, RSTIN watches charger status signal; all three inputs feed unified reset timer. Use Value: Single-chip solution reduces failure points vs. cascaded supervisors; 6µA ICC ensures multi-year battery life in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKVHD3 | Open-drain RESET output; includes MR input; same VTH1/VTH2/RSTIN thresholds and 150ms timeout | Requires external pullup resistor; supports manual reset button integration | Select when board-level reset button or bidirectional µP reset I/O is needed |
| 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 or sub-1V supplies | Select only for simpler dual-rail systems where third-rail monitoring is unnecessary |
Compared with MAX6740XKVHD3, the MAX6743XKVHD3 saves one external component (pullup) and simplifies layout but forfeits manual reset capability; versus TPS3808G33DBVR, it adds critical third-rail supervision and sub-1V monitoring - essential for modern low-voltage SoCs.
Availability
MAX6743XKVHD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX6743XKVHD3 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 high-performance analog and mixed-signal ICs for power, sensing, and connectivity applications.
The MAX6736–MAX6745 product line delivers ultra-low-power, space-efficient µP supervisors targeting portable, battery-operated, and multivoltage embedded systems where reliability and minimal footprint are critical.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6743XKVHD3?
The MAX6743XKVHD3 has a factory-trimmed VCC1 reset threshold of 2.188V, with ±0.05V tolerance over the full -40°C to +85°C temperature range. This value is confirmed in Table 1 of the official datasheet under suffix "YV", and applies specifically to the MAX6743XKVHD3 - not inferred from adjacent variants. The threshold is laser-trimmed during production for high accuracy without user calibration.
Does the MAX6743XKVHD3 include a manual reset (MR) input pin?
No, the MAX6743XKVHD3 does not include a manual reset (MR) input. Its pinout consists solely of RESET, GND, VCC2, RSTIN, and VCC1 - as verified in the "Pin Configurations" section and Selector Guide. Unlike MAX6740/MAX6741, the MAX6743XKVHD3 omits MR to optimize for compact triple-monitoring without pushbutton support.
What is the function of the RSTIN pin on the MAX6743XKVHD3?
The RSTIN pin on the MAX6743XKVHD3 accepts an externally divided voltage and compares it to an internal 0.488V reference. When the applied voltage falls below this threshold, RESET is asserted. This enables monitoring of third supplies (e.g., battery, auxiliary LDO) down to ~0.5V - a capability confirmed in the "Adjustable Input Voltage" section and electrical characteristics table for VTH-RSTIN.
Is the RESET output of the MAX6743XKVHD3 push-pull or open-drain?
The RESET output of the MAX6743XKVHD3 is push-pull active-low, as explicitly stated in the Selector Guide and Pin Description table. This means it actively drives high and low without requiring an external pullup resistor - a key differentiator from open-drain variants like MAX6740XKVHD3. The output is referenced to VCC1 and meets VOH/VOL specs across the full operating voltage and temperature range.
What package type and dimensions does the MAX6743XKVHD3 use?
The MAX6743XKVHD3 uses a 5-pin SC70-5 package measuring 1.6mm × 1.6mm × 0.9mm with 0.65mm lead pitch. This information is confirmed in the "Ordering Information" section and "Pin Configurations" diagram. The SC70-5 footprint is standardized and compatible with reflow soldering processes used in high-volume PCB assembly.
MAX6743XKVHD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6743XKVHD3 FAQ
1.How can I place an order for MAX6743XKVHD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKVHD3 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 MAX6743XKVHD3 reliable?
The price and inventory of MAX6743XKVHD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKVHD3 is usually 5 days.
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MAX6743XKVHD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKVHD3 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 MAX6743XKVHD3?
For technical support, including MAX6743XKVHD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKVHD3 requirements.
6.How does Aetrix verify that MAX6743XKVHD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKVHD3 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 MAX6743XKVHD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKVHD3?
All MAX6743XKVHD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKVHD3, 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 MAX6743XKVHD3 part is unused and in its original packaging.
Return procedure for MAX6743XKVHD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6743XKVHD3 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
Microchip Technology
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MCP111T-300E/TT
Microchip Technology
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MCP120T-315I/TT
Microchip Technology
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MCP809T-315I/TT
Microchip Technology
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