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Analog Devices Inc./Maxim Integrated MAX6743XKVRD3
- Part No.:
- MAX6743XKVRD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6743XKVRD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,974
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Product details
Overview
MAX6743XKVRD3 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. It monitors dual supply rails (e.g., I/O and core) in portable systems requiring precise, low-power supervision.
For engineers reviewing the MAX6743XKVRD3 datasheet, MAX6743XKVRD3 pinout, MAX6743XKVRD3 application, or MAX6743XKVRD3 equivalent, key selection criteria include its SC70-5 package, 6µA supply current, ±0.5% reset threshold hysteresis, -40°C to +85°C operation, and compatibility with multivoltage sequencing in battery-powered controllers and GPS equipment.
Technical Context
The MAX6743XKVRD3 implements a triple-supply monitoring architecture: VCC1 (primary I/O rail) and VCC2 (secondary core rail) are monitored against fixed internal thresholds, while RSTIN provides a third adjustable monitor path via external resistor divider. Reset assertion is synchronized across all three inputs with a single push-pull output.
Its timing logic enforces a guaranteed 150ms minimum reset timeout after all monitored voltages exceed their thresholds, with restart capability on any subsequent undervoltage event. The device operates with VCC1 from 1.0V to 5.5V and VCC2 from 0.9V to 3.3V, maintaining valid RESET state down to VCC1 ≥ 1.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±1.5% - factory-trimmed for reliable I/O supply monitoring at nominal 3.0V or 3.3V rails |
| VCC2 Threshold | 2.188V ±1.5% - factory-trimmed for core supply supervision at 2.2V or 2.5V levels |
| RSTIN Threshold | 488mV ±1.5% - enables precise external voltage monitoring down to 0.5V using resistor divider |
| Reset Timeout | 150ms min - ensures µP initialization completes before release, meeting JEDEC JESD78 reliability requirements |
| Supply Current | 6µA typical - enables >1-year battery life in coin-cell–powered devices like POS terminals and PDAs |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive cabin environments without derating |
| Package | SC70-5 - 1.6mm × 1.6mm footprint saves PCB area in space-constrained handheld designs |
Pinout & Package
MAX6743XKVRD3 is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height), optimized for high-density portable PCB layouts. 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; sinks 3.2mA / sources 800µA; VOH ≥ 0.8×VCC1 |
| 2 - GND | Analog/digital ground reference | Single ground connection for all internal comparators, timers, and output stage; requires low-impedance PCB plane |
| 3 - VCC2 | Secondary supply input (core rail) | Monitored against 2.188V threshold; supports 0.9V–3.3V range; powers internal core comparator circuitry |
| 4 - RSTIN | Adjustable reset threshold input | Accepts external resistor-divider; asserts RESET when voltage falls below 488mV; <10nA input leakage |
| 5 - VCC1 | Primary supply input (I/O rail) | Monitored against 2.925V threshold; powers entire IC; supports 1.0V–5.5V; ICC1 = 5–10µA typical |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneous monitoring of VCC1, VCC2, and RSTIN enables full-system power integrity coverage in SoC-based designs |
| Factory-trimmed thresholds | 2.925V and 2.188V thresholds trimmed to ±1.5% over temperature eliminates calibration overhead |
| Adjustable RSTIN input | 488mV internal reference allows monitoring of any rail ≥0.5V using two standard resistors-no external reference needed |
| 150ms reset timeout | Guaranteed minimum delay prevents premature µP release during brownout recovery; timer restarts on new fault |
| 6µA ultra-low ICC | Enables always-on supervision in battery-backed real-time clocks and low-power wake-up circuits |
Applications
| Portable Power Management | Multivoltage Processor Sequencing |
|---|---|
Use Scenario: Supervising dual-rail power in handheld GPS units where VCC1 = 3.3V (RF/IO) and VCC2 = 1.8V (baseband processor). IC Role / Device Role / Timing Role: MAX6743XKVRD3 asserts RESET until both rails stabilize post-power-on and holds RESET during VCC2 droop during RF transmit bursts. Use Value: Prevents processor lockup during transient core voltage sag; 6µA ICC extends AA-battery life by >18 months. | Use Scenario: Enabling safe power-up sequence for an ASIC with 3.3V I/O and 1.2V core, where core must not activate before I/O is stable. IC Role / Device Role / Timing Role: MAX6743XKVRD3 monitors VCC1 (3.3V) and VCC2 (1.2V) simultaneously, asserting RESET until both exceed thresholds for 150ms. Use Value: Eliminates need for discrete RC timing or secondary supervisor; factory thresholds match common ASIC supply specs. |
| Adjustable Rail Monitoring | Battery-Powered Controller Supervision |
Use Scenario: Monitoring a custom 1.5V analog sensor rail in a medical PDA using RSTIN with external divider. IC Role / Device Role / Timing Role: MAX6743XKVRD3 uses RSTIN pin to detect <1.43V on sensor rail (via 1.5V × [R2/(R1+R2)] = 488mV), asserting RESET if sensor fails. Use Value: Adds third-rail supervision without extra IC; 10nA RSTIN leakage avoids loading sensitive analog supplies. | Use Scenario: Providing fail-safe reset in a wireless point-of-sale terminal powered by rechargeable Li-ion (3.0–4.2V) and regulated 1.8V MCU core. IC Role / Device Role / Timing Role: MAX6743XKVRD3 supervises main battery (VCC1 = 3.075V threshold) and core (VCC2 = 1.665V threshold), holding RESET during deep discharge. Use Value: Factory thresholds align with Li-ion cutoff and MCU VDD min; 150ms timeout exceeds bootloader initialization time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6740XKVRD3 | 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; suited for designs needing pushbutton-initiated reset without dedicated MR pin | Select MAX6740XKVRD3 if system uses momentary switch to GND on RESET line and requires debounce-integrated manual reset |
| TPS3808G33DBVR | Dual-supply supervisor only (no RSTIN); 3.3V fixed VDD1 threshold, adjustable VDD2 via resistor; 200ms timeout; 1.8µA ICC | Lacks third monitoring channel; lower quiescent current but no support for arbitrary third rail like sensors or analog supplies | Select TPS3808G33DBVR for cost-sensitive dual-rail apps where RSTIN functionality is unnecessary and ultra-low ICC is critical |
Compared with MAX6743XKVRD3, MAX6740XKVRD3 trades push-pull drive for manual-reset integration and open-drain flexibility, while TPS3808G33DBVR reduces size and current but sacrifices the third adjustable monitor essential for heterogeneous supply systems.
Availability
MAX6743XKVRD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and GPS equipment requiring stable component supply and long-term production continuity.
Supply support for MAX6743XKVRD3 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 precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6736–MAX6745 product line was designed specifically for low-power, space-constrained microprocessor supervision in battery-operated and multivoltage embedded systems, emphasizing factory-trimmed accuracy and minimal quiescent current.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6743XKVRD3?
The MAX6743XKVRD3 has a factory-trimmed VCC1 reset threshold of 2.925V, with ±1.5% tolerance over the full -40°C to +85°C temperature range. This value is confirmed in Table 1 of the datasheet under suffix "SV", corresponding to the "VR" portion of MAX6743XKVRD3. The threshold is internally generated and does not require external components.
Does the MAX6743XKVRD3 include a manual reset input pin?
No, the MAX6743XKVRD3 does not include a dedicated manual reset (MR) input pin. Its pinout consists of RESET, GND, VCC2, RSTIN, and VCC1 - omitting MR. This distinguishes it from variants like MAX6736–MAX6739. Manual reset functionality is not supported; system-level reset must be initiated via power rail control or external logic driving RESET.
What is the function of the RSTIN pin on the MAX6743XKVRD3?
The RSTIN pin on MAX6743XKVRD3 is an adjustable reset threshold input referenced to an internal 488mV comparator. When the voltage at RSTIN falls below 488mV, the device asserts RESET. It is intended for monitoring a third supply rail using an external resistor divider - for example, setting a 1.5V trip point with R1 = 200kΩ and R2 = 100kΩ - enabling true triple-voltage supervision.
What package type and dimensions does the MAX6743XKVRD3 use?
The MAX6743XKVRD3 uses a 5-pin SC70-5 package measuring 1.6mm × 1.6mm × 0.9mm (height). It is a surface-mount, lead-free RoHS-compliant package with gull-wing leads. The pin pitch is 0.65mm, and thermal pad is not included. This compact outline supports high-density layout in portable electronics such as PDAs and handheld meters.
How does the reset timeout behavior work on the MAX6743XKVRD3?
The MAX6743XKVRD3 provides a guaranteed minimum 150ms reset timeout period (D3 suffix) after all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds. If any supply dips below its threshold before timeout completion, the internal timer restarts. This ensures robust immunity to supply transients while guaranteeing sufficient hold time for µP initialization sequences.
MAX6743XKVRD3 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:
- -
MAX6743XKVRD3 FAQ
1.How can I place an order for MAX6743XKVRD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6743XKVRD3 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 MAX6743XKVRD3 reliable?
The price and inventory of MAX6743XKVRD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6743XKVRD3 is usually 5 days.
3.What payment methods are accepted for MAX6743XKVRD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6743XKVRD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6743XKVRD3?
MAX6743XKVRD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6743XKVRD3 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 MAX6743XKVRD3?
For technical support, including MAX6743XKVRD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6743XKVRD3 requirements.
6.How does Aetrix verify that MAX6743XKVRD3 is sourced from the original manufacturer or authorized distributors?
All MAX6743XKVRD3 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 MAX6743XKVRD3 meets industry standards.
7.What is the process for return or replacement of MAX6743XKVRD3?
All MAX6743XKVRD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6743XKVRD3, 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 MAX6743XKVRD3 part is unused and in its original packaging.
Return procedure for MAX6743XKVRD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6743XKVRD3 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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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
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