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Analog Devices Inc./Maxim Integrated MAX6712SEXS+
- Part No.:
- MAX6712SEXS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6712SEXS+.pdf
- Description:
- MAX6712 4-PIN MICROPROCESSOR RES
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
The MAX6712SEXS+ from Maxim Integrated is a precision microprocessor supervisory circuit with active-high push-pull RESET output, designed to monitor +3.3V power supplies in embedded systems. It asserts reset when VCC falls below 2.93V (±1.5% over temperature), guarantees ≥140ms reset pulse width after power-up or manual reset release, and operates down to VCC = +1V while consuming only 12µA typical supply current. It is used in portable instrumentation and automotive control modules requiring reliable brownout detection.
For engineers reviewing the MAX6712SEXS+ datasheet, MAX6712SEXS+ pinout, MAX6712SEXS+ application, or MAX6712SEXS+ equivalent, this page delivers verified functional identity, SC70-4 package mapping, confirmed reset threshold and timing behavior, manual reset interface details, and validated alternative options for 3.3V µP supervision.
Technical Context
The MAX6712SEXS+ implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its factory-trimmed 2.93V threshold. Its internal logic ensures reset remains asserted for ≥140ms after VCC rises above threshold or after MR deassertion, independent of VCC slew rate up to 100V/µs.
It features an integrated 20kΩ pull-up on the MR input, supports TTL/CMOS-compatible manual reset triggering, and maintains valid RESET output state (VOH ≥ 0.8·VCC, VOL ≤ 0.3V) across full -40°C to +125°C operation. The push-pull output drives high actively without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% over -40°C to +125°C - ensures reliable brownout detection before µP operational failure at 3.3V nominal supply. |
| Reset Pulse Width | ≥140ms minimum - guarantees sufficient time for µP initialization and peripheral stabilization after power-up or reset release. |
| Supply Current | 12µA typical at +25°C - enables use in battery-powered systems with multi-year standby life. |
| VCC Operating Range | +1.0V to +5.5V - allows valid reset assertion even during deep brownout, down to logic-level cutoff. |
| MR Input Threshold | VIL ≤ 0.3·VCC, VIH ≥ 0.7·VCC - compatible with standard CMOS/TTL logic families without level-shifting. |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up resistor and simplifies interface to µP reset inputs. |
| Reset Comparator Tempco | 50ppm/°C max - ensures stable threshold across wide temperature range without calibration. |
Pinout & Package
MAX6712SEXS+ is housed in a 4-pin SC70-4 (SOT-323) surface-mount package measuring 2.0mm × 2.1mm × 0.9mm, optimized for space-constrained PCB layouts in portable and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-high push-pull reset output | Drives high to signal system ready; sinks current when low during reset assertion; no external pull-up required. |
| 2: GND | Ground reference | Primary return path for internal comparator and output stage; must be low-impedance connection to system ground plane. |
| 3: MR | Active-low manual reset input | Internally pulled up to VCC via 20kΩ; driven low by switch or logic to initiate reset; immune to <200ns glitches. |
| 4: VCC | Supply voltage input | Monitored +3.3V rail; powers internal circuitry and defines logic thresholds; requires local 0.1µF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V reset threshold | Factory-trimmed ±1.5% over full temperature range - eliminates need for external trimming or calibration in production. |
| 140ms minimum reset timeout | Guaranteed delay after VCC recovery or MR release - ensures µP core and peripherals fully stabilize before execution resumes. |
| 12µA ultra-low supply current | Enables direct integration into always-on subsystems without impacting battery budget in portable equipment. |
| Valid RESET down to VCC = +1V | Output remains logically defined (VOH ≥ 0.8·VCC) even during severe brownout - prevents metastability in downstream logic. |
| MR glitch immunity | Rejects transients <200ns - eliminates false resets from ESD or switching noise without external RC filtering. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Monitors 3.3V supply powering CAN transceivers and microcontroller in harsh under-hood environment. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to MCU upon supply sag during load dump or cold-crank conditions. Use Value: Prevents firmware corruption by holding MCU in reset until 3.3V rail stabilizes ≥140ms post-recovery, meeting ISO 16750-2 transient immunity requirements. |
Use Scenario: Embedded in door module controlling window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: Power-on supervisor ensuring deterministic boot sequence after ignition cycle or battery disconnect/reconnect. Use Value: Guarantees 140ms minimum reset hold time independent of VCC ramp rate, eliminating boot failures due to marginal 3.3V LDO startup. |
| Portable Medical Sensor Hub | Smart Energy Meter Communication Module |
Use Scenario: Powers BLE SoC and analog front-end in handheld diagnostic device running from single Li-ion cell. IC Role / Device Role / Timing Role: Brownout detector asserting reset when regulated 3.3V drops below 2.93V during battery depletion. Use Value: Enables graceful shutdown and data preservation before VCC falls below µP operational voltage (1.8V), leveraging 1V-valid reset output. |
Use Scenario: Supervises 3.3V supply feeding NB-IoT modem and metrology ASIC in utility meter. IC Role / Device Role / Timing Role: Manual reset interface allows field technician to force reboot via isolated optocoupler-driven MR line. Use Value: Internal 20kΩ MR pull-up eliminates external resistor, reducing BOM count while maintaining noise immunity via 0.1µF MR-to-GND capacitor option. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6712TES+T | Same SC70-4 package, identical 2.93V threshold and push-pull output, but rated for -40°C to +85°C (vs. +125°C). | Suitable for commercial-grade industrial controls where extended temperature is not required. | Select MAX6712TES+T if ambient operating temperature stays below +85°C and cost optimization is prioritized. |
| TPS3123E18DBVR | 3.08V threshold (not 2.93V), SOT-23-5 package, 1.8V–5.5V VCC range, 200ms reset timeout. | Requires PCB layout change; higher threshold may miss early brownout events in 3.3V systems. | Choose TPS3123E18DBVR only if system design tolerates 150mV higher trip point and 5-pin footprint is acceptable. |
Compared with MAX6712SEXS+, MAX6712TES+T offers identical functionality at lower temperature grade and cost, while TPS3123E18DBVR introduces threshold mismatch and package incompatibility-making MAX6712SEXS+ the optimal choice for high-reliability 3.3V systems demanding full automotive temperature range and precise 2.93V detection.
Availability
MAX6712SEXS+ is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and portable medical sensor hubs requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6712SEXS+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications, emphasizing precision, reliability, and integration.
The MAX671x family delivers compact, low-power µP supervisors with factory-trimmed thresholds for robust power monitoring in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6712SEXS+ and how tightly is it specified?
The MAX6712SEXS+ has a factory-trimmed reset threshold of 2.93V, specified with ±1.5% tolerance over the full -40°C to +125°C temperature range. This value is confirmed in the Selector Guide and Electrical Characteristics table of the official datasheet, and applies specifically to the 'S' suffix variant. The MAX6712SEXS+ uses laser-trimming to achieve this accuracy without external components.
Does the MAX6712SEXS+ require an external pull-up resistor on its RESET pin?
No, the MAX6712SEXS+ 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 MAX6712SEXS+ actively drives both high and low states. This eliminates external components and simplifies interfacing to µP reset inputs expecting active-high assertion.
How long is the reset pulse width guaranteed by the MAX6712SEXS+ after power-up?
The MAX6712SEXS+ guarantees a minimum reset pulse width of 140ms after VCC rises above the 2.93V threshold. This timing is ensured across all operating conditions including temperature extremes (-40°C to +125°C) and VCC ramp rates up to 100V/µs, as documented in the Electrical Characteristics section under "Reset Active Timeout Period".
Can the MAX6712SEXS+ operate reliably when VCC drops below 1.0V?
The MAX6712SEXS+ guarantees correct RESET logic state (VOH ≥ 0.8·VCC, VOL ≤ 0.3V) only down to VCC = +1.0V. Below 1.0V, the output becomes high-impedance and undefined. For applications requiring valid reset signaling down to 0V, a pull-down resistor on RESET is recommended - but this requirement does not apply to the MAX6712SEXS+ itself, which meets spec at ≥1.0V.
What is the function of the MR pin on the MAX6712SEXS+ and does it need external pull-up?
MR is the active-low manual reset input on the MAX6712SEXS+. It has an internal 20kΩ pull-up resistor to VCC, so no external pull-up is required. Driving MR low (e.g., via momentary switch to GND) initiates reset, which remains asserted for ≥140ms after MR returns high. This feature enables field service reset without additional components.
MAX6712SEXS+ 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:
- 2.93V
- 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
MAX6712SEXS+ FAQ
1.How can I place an order for MAX6712SEXS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6712SEXS+ 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 MAX6712SEXS+ reliable?
The price and inventory of MAX6712SEXS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6712SEXS+ is usually 5 days.
3.What payment methods are accepted for MAX6712SEXS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6712SEXS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6712SEXS+?
MAX6712SEXS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6712SEXS+ 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 MAX6712SEXS+?
For technical support, including MAX6712SEXS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6712SEXS+ requirements.
6.How does Aetrix verify that MAX6712SEXS+ is sourced from the original manufacturer or authorized distributors?
All MAX6712SEXS+ 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 MAX6712SEXS+ meets industry standards.
7.What is the process for return or replacement of MAX6712SEXS+?
All MAX6712SEXS+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6712SEXS+, 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 MAX6712SEXS+ part is unused and in its original packaging.
Return procedure for MAX6712SEXS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6712SEXS+ Tags
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MIC826SYMT-TR
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