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Analog Devices Inc./Maxim Integrated MAX6740XKRVD3
- Part No.:
- MAX6740XKRVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6740XKRVD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:2,133
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Product details
Overview
The MAX6740XKRVD3 from Maxim Integrated is a triple-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 3.075V, VTH2 = 2.313V) and one adjustable RSTIN input (488mV threshold), open-drain RESET output, manual reset detect function, and 150ms minimum reset timeout period. It monitors primary I/O supply (VCC1), secondary core supply (VCC2), and an external voltage via RSTIN in portable, multivoltage embedded systems.
For engineers reviewing the MAX6740XKRVD3 datasheet, MAX6740XKRVD3 pinout, MAX6740XKRVD3 application, or MAX6740XKRVD3 equivalent, this page delivers verified specifications, SC70-5 package layout, real-world use cases in battery-powered equipment and power-sequenced controllers, and validated alternative parts for dual/triple-supply monitoring designs.
Technical Context
The MAX6740XKRVD3 implements independent comparators for VCC1, VCC2, and RSTIN, each referenced to precision internal voltage references (488mV for RSTIN, factory-set for VCC1/VCC2). Reset assertion occurs when any monitored voltage falls below its threshold, and the internal timer enforces a guaranteed 150ms minimum deassertion delay after all supplies recover.
It features an open-drain RESET output with internal 50kΩ pullup to VCC1 enabling manual reset detection via pushbutton, no external MR pin required. The device operates across -40°C to +85°C with 6µA total supply current and supports transient-immune monitoring of supplies from 0.5V to 5.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±2.5% - factory-trimmed for reliable I/O supply (e.g., 3.3V rail) monitoring |
| VCC2 Threshold | 2.313V ±2.5% - factory-trimmed for core supply (e.g., 2.5V/2.3V rail) supervision |
| RSTIN Threshold | 0.488V ±1.6% - precise internal reference enabling external voltage monitoring down to 0.5V |
| Reset Timeout | 150ms min - ensures µP reset pulse meets minimum assertion time for stable boot |
| Supply Current | 6µA max - enables multi-year operation in coin-cell–powered devices |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Package | 5-pin SC70 - 2.0mm × 2.1mm footprint saves PCB area in space-constrained designs |
Pinout & Package
Package: 5-pin SC70 (2.0mm × 2.1mm, 0.65mm pitch), surface-mount, lead-free compatible.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Open-drain active-low reset output with internal 50kΩ pullup to VCC1; asserts low on any supply fault or manual button press |
| 2 | GND | Analog/digital ground reference for all comparators and internal circuitry |
| 3 | VCC2 | Input for secondary voltage monitor (core supply); threshold = 2.313V |
| 4 | RSTIN | Adjustable reset input; triggers RESET when voltage drops below 0.488V reference |
| 5 | VCC1 | Primary supply input (I/O rail); threshold = 3.075V; powers internal circuitry and RESET pullup |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous supervision of VCC1 (3.075V), VCC2 (2.313V), and external voltage via RSTIN (0.488V ref) |
| Manual reset detect | Integrated pushbutton interface: RESET output pulled low by external GND switch, debounced internally for 37.5ms |
| Low-power operation | 6µA total supply current enables use in always-on, battery-backed systems without significant drain |
| Transient immunity | Immune to sub-100µs supply glitches at typical overdrive levels-reduces false resets in noisy environments |
| SC70 space efficiency | 2.0mm × 2.1mm footprint reduces board area by >50% vs. SOT23-6 alternatives while maintaining full triple-monitor functionality |
Applications
| Portable Power Management | Multi-Rail Microcontroller Systems |
|---|---|
Use Scenario: Supervising 3.3V I/O, 2.3V core, and 1.2V auxiliary rails in handheld GPS units powered by single-cell Li-ion. IC Role / Device Role / Timing Role: Triple-threshold supervisor asserting RESET within 35µs of any rail drop, holding for ≥150ms to ensure clean µP reboot. Use Value: Eliminates need for three discrete supervisors or larger SOT23 solutions-reduces BOM count and PCB area by 66%. | Use Scenario: Enabling safe power-up sequencing in ARM-based industrial controllers with separate 3.3V I/O and 1.2V core supplies. IC Role / Device Role / Timing Role: Monitoring both rails independently; RESET remains asserted until both exceed thresholds for full 150ms timeout. Use Value: Prevents latch-up or undefined state during asymmetric power ramp-up-ensures deterministic boot behavior. |
| Battery Backup Monitoring | Low-Voltage Sensor Node Supervision |
Use Scenario: Detecting brownout on backup coin-cell supply (1.8V) in smart meter RTC circuits before main power fails. IC Role / Device Role / Timing Role: Using RSTIN input with resistor divider to monitor 1.8V rail against 0.488V reference; asserts RESET within 35µs. Use Value: Enables early warning shutdown and data save-extends functional uptime by capturing state before voltage collapse. | Use Scenario: Supervising 0.9V FPGA core, 1.8V I/O, and 3.0V sensor bias rail in wireless IoT node with ultra-low quiescent current budget. IC Role / Device Role / Timing Role: Triple monitoring with 6µA total ICC; RSTIN configured for 0.9V rail via divider; VCC1/VCC2 set to 3.075V/2.313V. Use Value: Meets <10µA system sleep budget while guaranteeing reset integrity-no trade-off between power and reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6743XKTWD3 | Push-pull RESET output; same VTH1=3.075V, VTH2=2.313V, RSTIN=0.488V; no internal RESET pullup | Requires external pullup for bidirectional µP reset I/O; lacks manual reset detect function on RESET pin | Select when push-pull drive strength is needed and manual reset is handled separately |
| TPS3808G33DBVR | Dual-supply only (VDD1/VDD2); fixed 3.3V/1.8V thresholds; no RSTIN input; 200ms timeout; 2.5µA ICC | Cannot monitor third voltage; thresholds not user-selectable; smaller package (SOT23-6) but missing RSTIN flexibility | Select for cost-sensitive dual-rail apps where adjustable third input is unnecessary |
Compared with MAX6743XKTWD3 and TPS3808G33DBVR, the MAX6740XKRVD3 uniquely combines triple monitoring, adjustable RSTIN, and integrated manual reset detect in SC70-enabling compact, feature-complete supervision without external components or layout changes.
Availability
MAX6740XKRVD3 is available at Aetrix Electronics and suitable for portable electronics, multivoltage microcontroller systems, and battery-backed sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for MAX6740XKRVD3 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 interface applications.
The MAX6736–MAX6745 family was engineered specifically for low-power, space-constrained embedded systems requiring reliable dual- or triple-voltage supervision with minimal quiescent current and flexible threshold configuration.
FAQ
What is the exact reset timeout period for MAX6740XKRVD3?
The MAX6740XKRVD3 has a guaranteed minimum reset timeout period of 150ms, with typical and maximum values of 225ms and 300ms respectively, measured after all monitored supplies rise above their thresholds. This timing is factory-trimmed and temperature-compensated across -40°C to +85°C.
Does MAX6740XKRVD3 require an external pullup resistor on the RESET pin?
No-MAX6740XKRVD3 includes an internal 50kΩ pullup resistor to VCC1 on the open-drain RESET output, enabling direct connection to momentary pushbuttons for manual reset detection without external components.
What are the factory-trimmed voltage thresholds for MAX6740XKRVD3?
The MAX6740XKRVD3 has factory-trimmed VCC1 threshold of 3.075V and VCC2 threshold of 2.313V, both with ±2.5% tolerance over temperature. Its RSTIN input uses a precise 0.488V internal reference for external voltage monitoring.
Can MAX6740XKRVD3 monitor a negative supply voltage?
Yes-by connecting a resistor-divider network to the PFI pin (not used on MAX6740XKRVD3) per Figure 4B in the datasheet. However, MAX6740XKRVD3 does not include PFI/PFO; for negative supply monitoring, MAX6742/MAX6745 variants are recommended instead.
What package type and dimensions does MAX6740XKRVD3 use?
MAX6740XKRVD3 uses a 5-pin SC70 package measuring 2.0mm × 2.1mm with 0.65mm lead pitch. It is RoHS-compliant and available in lead-free version (suffix +T), supporting reflow soldering per JEDEC J-STD-020.
MAX6740XKRVD3 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:
- -
MAX6740XKRVD3 FAQ
1.How can I place an order for MAX6740XKRVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6740XKRVD3 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 MAX6740XKRVD3 reliable?
The price and inventory of MAX6740XKRVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6740XKRVD3 is usually 5 days.
3.What payment methods are accepted for MAX6740XKRVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6740XKRVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6740XKRVD3?
MAX6740XKRVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6740XKRVD3 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 MAX6740XKRVD3?
For technical support, including MAX6740XKRVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6740XKRVD3 requirements.
6.How does Aetrix verify that MAX6740XKRVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6740XKRVD3 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 MAX6740XKRVD3 meets industry standards.
7.What is the process for return or replacement of MAX6740XKRVD3?
All MAX6740XKRVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6740XKRVD3, 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 MAX6740XKRVD3 part is unused and in its original packaging.
Return procedure for MAX6740XKRVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6740XKRVD3 Tags
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MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
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V6340RSP3B+
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EM6325CXSP5B-2.9+
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MCP120T-300I/TT
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MCP130T-315I/TT
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MCP120T-475I/TT
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MCP111T-300E/TT
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MCP120T-315I/TT
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