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Analog Devices Inc./Maxim Integrated MAX6712LEXS+
- Part No.:
- MAX6712LEXS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6712LEXS+.pdf
- Description:
- MAX6712 4-PIN MICROPROCESSOR RES
- Quantity:
- Payment:
- Shipping:
Inventory:2,085
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Product details
Overview
MAX6712LEXS+ from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit designed to monitor +5.0V power supplies in embedded digital systems. It provides precision reset threshold detection at 4.63V (±0.5%), 140ms minimum reset timeout, 12µA supply current, and a debounced manual reset input - enabling reliable power-on/brownout protection for µP-based controllers and portable instrumentation.
For engineers reviewing the MAX6712LEXS+ datasheet, MAX6712LEXS+ pinout, MAX6712LEXS+ application, or MAX6712LEXS+ equivalent, this device serves as a low-power, temperature-stable reset supervisor with guaranteed reset validity down to VCC = +1V, immunity to fast VCC transients (<20µs at 100mV overdrive), and SC70-4 packaging optimized for space-constrained PCB layouts.
Technical Context
The MAX6712LEXS+ implements a precision bandgap-based voltage comparator with ±0.5% threshold accuracy over -40°C to +125°C, ensuring deterministic reset assertion before critical µP operating voltage limits are violated. Its internal 20kΩ MR pull-up resistor eliminates external components for manual reset functionality.
Reset assertion is triggered when VCC falls below 4.63V and remains active for ≥140ms after VCC rises above threshold or MR is released. The push-pull output drives high (VOH ≥ 0.8·VCC) and low (VOL ≤ 0.3V) without external biasing, supporting direct interface to CMOS/TTL reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±0.5% - precisely matches +5.0V nominal supply with 7.4% headroom before reset activation. |
| Reset Timeout | ≥140ms - ensures µP completes full power-up initialization before release. |
| Supply Current | 12µA max - enables multi-year battery life in portable equipment. |
| VCC Operating Range | +1.0V to +5.5V - guarantees valid reset state even during deep brownout conditions. |
| MR Input Threshold | VIL ≤ 0.3·VCC, VIH ≥ 0.7·VCC - compatible with standard CMOS logic levels. |
| Output Type | Active-high push-pull - eliminates need for external pull-up resistor and supports direct µP reset pin drive. |
| Temp Range | -40°C to +125°C - qualified for automotive under-hood and industrial control environments. |
Pinout & Package
MAX6712LEXS+ is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm × 0.9mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output - asserts high during reset; sinks 3.2mA min at VCC = 4.63V. |
| 2 | GND | Ground reference - must be connected to system ground plane for stable comparator operation. |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC (20kΩ); driven low to force reset. |
| 4 | VCC | Supply input - accepts +2.5V to +5.5V; powers internal circuitry and defines reset threshold reference. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | ±0.5% tolerance over full temperature range ensures consistent reset point across automotive and industrial environments. |
| 140ms power-on reset | Guaranteed minimum timeout prevents premature µP execution before clock stabilization and memory initialization. |
| 12µA supply current | Enables integration into always-on monitoring circuits without compromising battery runtime in portable devices. |
| Manual reset with internal pull-up | 20kΩ MR pull-up eliminates external resistor; supports momentary switch-to-ground interface without debounce circuitry. |
| VCC transient immunity | Rejects negative-going glitches <20µs wide at 100mV overdrive - prevents false resets in noisy power rails. |
Applications
| Automotive Engine Control Units | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring 5V supply rails in engine control units exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting reset during cold-crank brownout (VCC < 4.63V) and holding for ≥140ms post-recovery. Use Value: Prevents corrupted firmware execution during unstable battery conditions, meeting ISO 16750-2 pulse 4 requirements. |
Use Scenario: Ensuring deterministic startup of programmable logic controller modules powered from isolated 5V DC-DC converters. IC Role / Device Role / Timing Role: Providing synchronized reset to multiple µPs and FPGA configuration logic upon power-up and fault recovery. Use Value: Eliminates race conditions between peripherals by guaranteeing reset release only after stable 5V rail and clock sources are established. |
| Portable Medical Diagnostic Devices | Smart Energy Metering Terminals |
|
Use Scenario: Supervising primary 5V supply in handheld ultrasound or glucose monitors operating on single-cell Li-ion batteries with boost regulators. IC Role / Device Role / Timing Role: Detecting undervoltage events during battery depletion and initiating controlled shutdown via active-high reset signal. Use Value: Extends usable battery life by allowing operation down to VCC = +1.0V while maintaining valid reset state integrity. |
Use Scenario: Securing meter firmware integrity during AC mains interruptions and capacitor hold-up decay in smart electricity meters. IC Role / Device Role / Timing Role: Generating fail-safe reset when 5V auxiliary supply drops below 4.63V due to bulk capacitor discharge. Use Value: Meets IEC 62053-21 requirement for secure meter restart after power interruption without data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6712TES+ | 3.08V reset threshold; same SC70-4 package, push-pull output, and 140ms timeout. | Designed for +3.3V systems instead of +5.0V; unsuitable for 5V rail monitoring without redesign. | Select MAX6712TES+ only when supervising 3.3V supplies - threshold mismatch makes it non-interchangeable with MAX6712LEXS+. |
| TPS3808G33DBVR | 3.3V threshold, open-drain output, 200ms timeout, 1.5µA quiescent current, SOT-23-5 package. | Lacks manual reset input; requires external pull-up; lower supply current but incompatible pinout and reset polarity. | Choose TPS3808G33DBVR for ultra-low-power 3.3V applications where manual reset is unnecessary and board layout allows SOT-23-5 footprint. |
Compared with MAX6712LEXS+, MAX6712TES+ offers identical functionality but targets 3.3V systems, while TPS3808G33DBVR trades manual reset and active-high output for lower current and different packaging - neither is pin- or functionally compatible without schematic and layout changes.
Availability
MAX6712LEXS+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and portable medical diagnostic devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6712LEXS+ 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 demanding industrial, automotive, and computing applications, with emphasis on reliability, low power, and small form factors.
The MAX671x family delivers highly accurate, low-quiescent-current supervisory circuits for microprocessor power monitoring - specifically engineered to replace discrete reset solutions in space- and power-constrained embedded systems.
FAQ
What is the reset threshold voltage of the MAX6712LEXS+?
The MAX6712LEXS+ has a factory-trimmed reset threshold of 4.63V with ±0.5% accuracy over -40°C to +125°C. This value is specified for +5.0V supply monitoring and ensures reset assertion occurs before the microprocessor's minimum operating voltage is violated. The threshold is set using laser-trimmed resistors and remains stable across temperature and supply variations.
Does the MAX6712LEXS+ require external components for basic operation?
No, the MAX6712LEXS+ operates autonomously with no external components required. Its internal 20kΩ pull-up resistor on the MR pin enables direct connection of a momentary switch to ground, and the active-high push-pull RESET output drives µP reset inputs directly without a pull-up. Only a 0.1µF VCC bypass capacitor is recommended for noise immunity.
Can the MAX6712LEXS+ operate reliably during deep brownout conditions?
Yes, the MAX6712LEXS+ guarantees valid reset output down to VCC = +1.0V. Below this voltage, the RESET output becomes high-impedance, but within its operational range, it maintains correct logic states - driving high (≥0.8·VCC) during reset and low (≤0.3V) otherwise - ensuring deterministic behavior during gradual supply collapse.
How does the MAX6712LEXS+ handle power supply transients?
The MAX6712LEXS+ rejects short-duration negative-going VCC transients: a 100mV dip below 4.63V lasting ≤20µs will not trigger a false reset. This immunity is achieved through comparator hysteresis and internal filtering, making it suitable for noisy automotive and industrial power rails where load dumps or switching noise occur.
What is the function of the MR pin on the MAX6712LEXS+?
The MR (Manual Reset) pin on the MAX6712LEXS+ is an active-low input that forces reset assertion when pulled low. It features an internal 20kΩ pull-up resistor, so it can be left unconnected if unused. When used, a normally open switch between MR and GND provides hardware-initiated reset without external debounce circuitry.
MAX6712LEXS+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6712LEXS+ FAQ
1.How can I place an order for MAX6712LEXS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6712LEXS+ 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 MAX6712LEXS+ reliable?
The price and inventory of MAX6712LEXS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6712LEXS+ is usually 5 days.
3.What payment methods are accepted for MAX6712LEXS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6712LEXS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6712LEXS+?
MAX6712LEXS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6712LEXS+ 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 MAX6712LEXS+?
For technical support, including MAX6712LEXS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6712LEXS+ requirements.
6.How does Aetrix verify that MAX6712LEXS+ is sourced from the original manufacturer or authorized distributors?
All MAX6712LEXS+ 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 MAX6712LEXS+ meets industry standards.
7.What is the process for return or replacement of MAX6712LEXS+?
All MAX6712LEXS+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6712LEXS+, 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 MAX6712LEXS+ part is unused and in its original packaging.
Return procedure for MAX6712LEXS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6712LEXS+ Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803L20-29SA-7
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