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Analog Devices Inc./Maxim Integrated MAX6712LEXS+T
- Part No.:
- MAX6712LEXS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6712LEXS+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,241
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Product details
Overview
MAX6712LEXS+T from Maxim Integrated is a microprocessor supervisory circuit with active-high push-pull RESET output, designed to monitor +5.0V power supplies and assert reset during power-up, brownout, or manual reset events. It features a 4.63V reset threshold (±0.07V at +25°C), 140ms minimum reset timeout, 12µA supply current at +25°C, and guaranteed reset validity down to VCC = +1V. It is used in critical µP systems requiring reliable power monitoring without external components.
For engineers reviewing the MAX6712LEXS+T datasheet, MAX6712LEXS+T pinout, MAX6712LEXS+T application, or MAX6712LEXS+T equivalent, key selection considerations include its active-high push-pull output configuration, SC70-4 package footprint, -40°C to +125°C operating range, and compatibility with 5V digital systems requiring precise voltage supervision and manual reset capability.
Technical Context
The MAX6712LEXS+T implements a precision bandgap-based reset comparator with 30ppm/°C temperature coefficient, ensuring stable threshold behavior across its full -40°C to +125°C range. Its internal 20kΩ MR pull-up resistor enables direct switch-to-ground connection without external biasing.
Reset assertion is triggered when VCC falls below 4.63V (L-grade), with immunity to transients ≤20µs at 100mV overdrive. The push-pull output drives high to ≥0.8×VCC at 150µA load and low to ≤0.3V at 1.2mA sink, eliminating need for external pull-ups while supporting direct interface to 5V CMOS inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±0.07V at +25°C; ensures reset activation before 5V supply drops beyond 5% tolerance. |
| Reset Timeout | 140ms min after VCC rise; guarantees µP initialization completes before release. |
| Supply Current | 12µA typical at +25°C; enables use in battery-powered equipment with minimal quiescent drain. |
| Operating Voltage Range | 1.0V to 5.5V; allows valid reset signaling even as VCC decays to 1V, supporting graceful shutdown. |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC; compatible with standard TTL/CMOS logic levels. |
| Output Type | Active-high push-pull; drives RESET high during fault condition-no external pull-up required. |
| Package | 4-pin SC70 (X4-1); 1.3mm × 1.1mm footprint ideal for space-constrained embedded designs. |
Pinout & Package
MAX6712LEXS+T is housed in a 4-pin SC70 package (outline X4-1, land pattern 90-0187), measuring 1.3mm × 1.1mm × 0.6mm with gull-wing leads. This RoHS-compliant, lead-free package supports reflow soldering and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for all internal circuitry; must be connected to system ground plane for noise immunity. |
| 2 RESET | Active-high reset output | Push-pull driver asserts high during reset; sinks current when low, sources when high-no external pull-up needed. |
| 3 MR | Manual reset input | Active-low input with internal 20kΩ pull-up; driven low by momentary switch or logic to initiate reset. |
| 4 VCC | Supply voltage input | Accepts +5.0V nominal supply; monitors this rail for brownout detection and powers internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V reset threshold | Guaranteed ±0.07V at +25°C and ±0.25V over full -40°C to +125°C range-enables deterministic 5V system reset timing. |
| 140ms minimum reset pulse width | Ensures µP reset duration exceeds minimum requirement of most 8/16-bit microcontrollers during power-up. |
| 12µA supply current | Reduces battery load in portable equipment; supports >10-year operation on coin-cell batteries in standby mode. |
| Valid reset down to VCC = +1V | Maintains defined logic state through deep brownout, preventing spurious µP wake-up or undefined behavior. |
| MR glitch immunity | Rejects noise pulses <100ns wide-eliminates false resets from ESD or switching transients on manual reset line. |
Applications
| Computers | Controllers |
|---|---|
Use Scenario: Desktop and industrial PC motherboards requiring reliable power-on reset sequencing for x86 or ARM-based processors. IC Role / Device Role / Timing Role: Supervises +5V main rail and generates clean, extended active-high reset pulse synchronized to VCC stabilization. Use Value: Prevents boot failures caused by marginal VCC ramp rates or transient dips during cold start. | Use Scenario: PLC CPU modules where deterministic reset behavior under fluctuating 5V field power is mandatory. IC Role / Device Role / Timing Role: Monitors regulated 5V supply and asserts reset if voltage sags below 4.63V for >140ms-ensuring firmware reload only after stable power. Use Value: Eliminates watchdog timeouts and uncontrolled restarts in harsh industrial environments. |
| Intelligent Instruments | Critical µP and µC Power Monitoring |
Use Scenario: Portable handheld test equipment (e.g., multimeters, spectrum analyzers) powered by rechargeable Li-ion packs. IC Role / Device Role / Timing Role: Provides low-current (12µA) supervision of 5V DC-DC output, enabling long battery life while guaranteeing reset integrity down to 1V VCC. Use Value: Enables graceful shutdown and memory retention during battery depletion without corrupted firmware states. | Use Scenario: Medical diagnostic devices where µP reset failure could compromise patient safety or data integrity. IC Role / Device Role / Timing Role: Acts as primary brownout detector for safety-critical 5V logic rails, with 30ppm/°C tempco ensuring threshold stability across operating temperature extremes. Use Value: Meets IEC 62304 Class C software requirements by providing deterministic, fail-safe reset initiation independent of µP internal logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6711LEXS+T | Identical package and threshold (4.63V), but active-low push-pull RESET output. | Requires inverted reset logic on µP side; not drop-in compatible with active-high reset inputs. | Select when target µP accepts active-low reset or level-shifting is already implemented. |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms reset timeout, 1.6µA quiescent current, SOT-23-5 package. | Designed for 3.3V systems; different pin count and layout; lacks manual reset input. | Choose for ultra-low-power 3.3V applications where MR functionality is unnecessary and longer timeout is acceptable. |
Compared with MAX6712LEXS+T, MAX6711LEXS+T requires no hardware change but mandates µP-level logic inversion, whereas TPS3808G33DBVR offers lower current draw but necessitates PCB redesign and forfeits manual reset capability-making MAX6712LEXS+T optimal for legacy 5V systems needing MR support and active-high interface.
Availability
MAX6712LEXS+T is available at Aetrix Electronics and suitable for computers, industrial controllers, intelligent instruments, and critical µP power monitoring applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6712LEXS+T 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 industrial, computing, communications, and consumer markets, with emphasis on reliability, integration, and low-power operation.
The MAX671x family delivers highly accurate, low-quiescent-current microprocessor supervisory circuits targeting 5V, 3.3V, 3.0V, and 2.5V systems where deterministic reset timing and manual reset capability are essential.
FAQ
What is the reset threshold voltage of the MAX6712LEXS+T and how stable is it over temperature?
The MAX6712LEXS+T has a nominal reset threshold of 4.63V at +25°C, with guaranteed limits of 4.50V to 4.75V over -40°C to +85°C and 4.40V to 4.86V over +85°C to +105°C. Its temperature coefficient is 30ppm/°C, meaning threshold drift is tightly controlled-typically less than ±15mV across the full -40°C to +125°C range. This stability ensures consistent brownout detection in thermally demanding environments without recalibration.
Does the MAX6712LEXS+T require external components to operate?
No, the MAX6712LEXS+T operates autonomously with no external components required. Its internal 20kΩ pull-up resistor on the MR pin allows direct connection of a momentary switch to ground, and its push-pull RESET output eliminates the need for an external pull-up resistor. Only bypass capacitance (e.g., 0.1µF near VCC) is recommended for transient immunity-no resistors, capacitors, or trimming elements are needed for basic supervision functionality.
How does the manual reset (MR) input behave on the MAX6712LEXS+T?
The MR input on the MAX6712LEXS+T is active-low with built-in 20kΩ pull-up resistance. When pulled low (≤0.3×VCC), it immediately asserts the active-high RESET signal. After release, RESET remains asserted for at least 140ms to ensure µP reset completion. MR accepts TTL/CMOS logic levels and is immune to glitches <100ns wide. If unused, MR may be left floating or tied to VCC-no external biasing is necessary due to the internal pull-up.
Can the MAX6712LEXS+T be used in battery-powered equipment?
Yes, the MAX6712LEXS+T is specifically optimized for portable and battery-powered equipment. With a typical supply current of 12µA at +25°C and operation down to VCC = +1V, it minimizes battery drain while maintaining valid reset signaling throughout deep discharge. Its SC70 package enables compact placement near µP reset pins, and its 140ms reset timeout ensures reliable initialization even with slow-ramping battery-backed supplies.
What is the absolute maximum rating for VCC on the MAX6712LEXS+T?
The absolute maximum VCC rating for the MAX6712LEXS+T is +6.0V, with recommended operating range of +1.0V to +5.5V. Exceeding +6.0V may cause permanent damage. The device is fully specified for operation at +5.0V nominal supply, and its reset comparator remains functional down to +1.0V-ensuring robust supervision across the entire usable voltage window without latch-up or undefined behavior.
MAX6712LEXS+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6712LEXS+T FAQ
1.How can I place an order for MAX6712LEXS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6712LEXS+T 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+T reliable?
The price and inventory of MAX6712LEXS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6712LEXS+T is usually 5 days.
3.What payment methods are accepted for MAX6712LEXS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6712LEXS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6712LEXS+T?
MAX6712LEXS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6712LEXS+T 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+T?
For technical support, including MAX6712LEXS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6712LEXS+T requirements.
6.How does Aetrix verify that MAX6712LEXS+T is sourced from the original manufacturer or authorized distributors?
All MAX6712LEXS+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX6712LEXS+T?
All MAX6712LEXS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6712LEXS+T, 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+T part is unused and in its original packaging.
Return procedure for MAX6712LEXS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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