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Analog Devices Inc./Maxim Integrated MAX6712MEXS
- Part No.:
- MAX6712MEXS
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6712MEXS.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,179
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Product details
Overview
The MAX6712MEXS from Maxim Integrated is a precision microprocessor supervisory circuit with active-high push-pull RESET output, designed to monitor +3.3V supply rails in embedded digital systems. It provides 2.93V reset threshold (±0.5% over temperature), 140ms minimum reset timeout, 12µA supply current, and guaranteed reset validity down to VCC = +1V - enabling reliable power-on/power-down sequencing in portable and automotive control units.
For engineers reviewing the MAX6712MEXS datasheet, MAX6712MEXS pinout, MAX6712MEXS application, or MAX6712MEXS equivalent, this device is selected for low-power, high-accuracy reset supervision where active-high logic interface, manual reset input immunity, and SC70-4 footprint compatibility are required.
Technical Context
The MAX6712MEXS integrates a precision voltage comparator with hysteresis, internal 20kΩ MR pull-up resistor, and push-pull output driver optimized for TTL/CMOS-compatible reset assertion. Its reset threshold is factory-trimmed to 2.93V (MAX6712S variant) and fully specified from –40°C to +125°C with ±0.5% accuracy.
It features glitch-immune MR input (100ns minimum pulse width, 200ns noise rejection), power-supply transient immunity up to 100V/µs, and guaranteed correct output state for VCC ≥ 1V - eliminating external RC timing components and debouncing circuitry in battery-powered µP systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±0.5% over –40°C to +125°C - ensures deterministic reset at 1.5% below nominal 3.3V supply, avoiding brownout uncertainty zones. |
| RESET Output Type | Active-high push-pull - drives high without external pull-up; compatible with µP reset inputs requiring asserted-HI signal. |
| Reset Timeout | ≥140ms after VCC rises above threshold - meets JEDEC JESD8-12B power-up sequencing requirements for 3.3V systems. |
| Supply Current | 12µA typical at +25°C - enables >10-year battery life in coin-cell–powered instrumentation and remote sensors. |
| MR Input | Internal 20kΩ pull-up; TTL/CMOS-compatible; 100ns min pulse width - supports direct switch-to-ground connection without external components. |
| VCC Operating Range | +2.5V to +5.5V - supports operation across 2.5V, 3.0V, 3.3V, and 5.0V logic domains while monitoring only 3.3V rail. |
| Reset Valid Down To | VCC = +1V - guarantees defined logic state during deep brownout, preventing metastability in downstream logic. |
Pinout & Package
MAX6712MEXS is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm × 0.95mm height), surface-mount, lead-free compliant (RoHS). Pin 1 is RESET (active-high), Pin 2 is GND, Pin 3 is MR (manual reset, active-low), Pin 4 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull output | Drives high to assert reset; sinks current when low; no external pull-up required; interfaces directly with µP reset-HI pins. |
| 2 - GND | Ground reference | Return path for internal comparator and output stage; must be connected to system ground plane with low-inductance trace. |
| 3 - MR | Manual reset input (active-low) | Asserts reset when pulled low; internally pulled up to VCC via 20kΩ; accepts TTL/CMOS levels or momentary switch to GND. |
| 4 - VCC | Supply input | Power source for internal circuitry; monitors this rail for reset condition; operates from 2.5V to 5.5V with full spec compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | Factory-trimmed ±0.5% over full temperature range - eliminates need for external calibration or margining in 3.3V systems. |
| 140ms power-on reset timeout | Internally timed, temperature-stable delay - satisfies boot-time requirements of ARM Cortex-M, PIC, and 8051 microcontrollers. |
| 12µA ultra-low ICC | Enables continuous supervision in energy-harvesting and battery-backed applications without measurable drain impact. |
| MR input with 20kΩ internal pull-up | Reduces BOM count by one resistor; allows direct switch connection; supports open-drain logic drivers without external biasing. |
| VCC = +1V reset validity | Ensures clean deassertion edge as supply recovers - prevents partial initialization or latch-up in µP peripherals during recovery. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Monitors 3.3V MCU supply in DIN-rail mounted programmable logic controller with isolated field I/O. IC Role / Device Role / Timing Role: Supervisory IC asserting active-high reset to ARM Cortex-M4 during cold start, brownout, or ESD-induced supply sag. Use Value: Prevents firmware corruption by guaranteeing ≥140ms reset hold time even under –40°C to +85°C ambient and 100V/µs transients on 24V input rails. |
Use Scenario: Embedded in door module controlling window lift, mirror fold, and interior lighting via CAN-connected MCU. IC Role / Device Role / Timing Role: Reset supervisor for 3.3V domain powering CAN transceiver and local microcontroller; MR tied to service diagnostic port. Use Value: Ensures deterministic restart after battery disconnect/reconnect events and meets ISO 16750-2 pulse 4a/b transient immunity requirements. |
| Portable Medical Sensor Hub | Smart Energy Meter MCU Subsystem |
Use Scenario: Powers BLE-enabled glucose monitor with coin-cell backup and 3.3V LDO-regulated main supply. IC Role / Device Role / Timing Role: Low-current supervisory IC asserting reset to nRF52832 during battery swap or low-VBAT conditions. Use Value: 12µA ICC extends shelf life; 2.93V threshold aligns precisely with LDO dropout voltage to avoid false resets during load transients. |
Use Scenario: Monitors 3.3V supply feeding metrology ADC, real-time clock, and secure element in Class 0.5S electricity meter. IC Role / Device Role / Timing Role: Precision reset generator ensuring clean startup of metrology chain after AC mains interruption or capacitor discharge. Use Value: ±0.5% threshold tolerance prevents premature reset during 1% line sags; SC70-4 footprint saves space in sealed meter housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6712TEXS | 3.08V reset threshold (vs. 2.93V); otherwise identical pinout, timing, and electrical specs. | Targeted for 3.3V systems with tighter tolerance on upper supply margin; less tolerant of 3.3V LDO dropout. | Select when system VCC nominal is 3.3V but design requires reset at 7% below nominal rather than 1.5%. |
| TPS3123E18DBVR | 2.63V threshold, SOT-23-5 package, active-low open-drain output; requires external pull-up; 1.8V–5.5V VCC range. | Requires PCB layout change (5-pin vs. 4-pin); incompatible logic polarity; suited for multi-rail reset bus sharing. | Choose only if open-drain bus architecture or lower threshold (2.63V) is mandatory; not drop-in compatible. |
Compared with MAX6712TEXS and TPS3123E18DBVR, the MAX6712MEXS offers the tightest alignment to 3.3V supply brownout detection at 2.93V, delivers active-high push-pull drive without external components, and fits the smallest standard footprint - making it optimal for space-constrained, single-rail 3.3V µP supervision.
Availability
MAX6712MEXS is available at Aetrix Electronics and suitable for industrial PLC modules, automotive body controllers, portable medical sensors, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX6712MEXS 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, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.
The MAX671x family delivers highly accurate, low-power microprocessor supervisory circuits targeting robust reset generation in harsh environments - specifically engineered for systems where supply margin, temperature stability, and board space are critical constraints.
FAQ
What is the exact reset threshold voltage of the MAX6712MEXS and how is it specified over temperature?
The MAX6712MEXS has a factory-trimmed reset threshold of 2.93V, with ±0.5% accuracy guaranteed over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Selector Guide and Electrical Characteristics table of the official datasheet (Rev 1, 12/05), and applies specifically to the "S" suffix variant within the MAX6712 family. The MAX6712MEXS does not require external calibration to maintain this specification.
Does the MAX6712MEXS require an external pull-up resistor on its RESET pin?
No, the MAX6712MEXS does not require an external pull-up resistor because it features an active-high push-pull RESET output. Unlike open-drain variants (e.g., MAX6713), the MAX6712MEXS actively drives both high and low states. This eliminates the need for external biasing and simplifies interface with microcontrollers expecting an asserted-HI reset signal - a key feature confirmed in the General Description and Pin Description sections of the MAX6712MEXS datasheet.
How long is the reset timeout period of the MAX6712MEXS, and is it adjustable?
The MAX6712MEXS provides a fixed minimum reset timeout of 140ms after VCC rises above the 2.93V threshold or after the MR input is released. This timing is internally generated and not user-adjustable - a deliberate design choice to ensure consistent, temperature-stable reset duration without external RC components. The 140ms value is guaranteed across –40°C to +125°C and is documented in both the General Description and Electrical Characteristics tables for the MAX6712MEXS.
Can the MAX6712MEXS operate with supply voltages other than 3.3V?
Yes, the MAX6712MEXS operates from VCC = +2.5V to +5.5V, but it is specifically configured to monitor a 3.3V rail with a 2.93V threshold. Its internal circuitry functions correctly across that full supply range, though the reset condition is always evaluated against the fixed 2.93V comparator reference - meaning it remains valid for 3.3V systems regardless of whether VCC is derived from a 5V, 3.3V, or 2.5V source, as long as the monitored rail is 3.3V and connected to VCC. This behavior is explicitly stated in the Absolute Maximum Ratings and Applications Information sections for MAX6712MEXS.
What is the function of the MR pin on the MAX6712MEXS and does it need external pull-up?
The MR (Manual Reset) pin on the MAX6712MEXS is an active-low input that asserts reset when pulled to GND. It includes an internal 20kΩ pull-up resistor to VCC, so no external pull-up is required. The MR pin accepts TTL- or CMOS-level signals and supports direct connection to a momentary switch between MR and GND - a capability verified in the Pin Description and Applications Information sections of the MAX6712MEXS datasheet. Leaving MR unconnected defaults it to high (inactive) due to the internal pull-up.
MAX6712MEXS 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6712MEXS FAQ
1.How can I place an order for MAX6712MEXS through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6712MEXS 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 MAX6712MEXS reliable?
The price and inventory of MAX6712MEXS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6712MEXS is usually 5 days.
3.What payment methods are accepted for MAX6712MEXS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6712MEXS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6712MEXS?
MAX6712MEXS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6712MEXS 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 MAX6712MEXS?
For technical support, including MAX6712MEXS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6712MEXS requirements.
6.How does Aetrix verify that MAX6712MEXS is sourced from the original manufacturer or authorized distributors?
All MAX6712MEXS 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 MAX6712MEXS meets industry standards.
7.What is the process for return or replacement of MAX6712MEXS?
All MAX6712MEXS units undergo pre-shipment inspection (PSI). If there is an issue with MAX6712MEXS, 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 MAX6712MEXS part is unused and in its original packaging.
Return procedure for MAX6712MEXS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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