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Analog Devices Inc./Maxim Integrated MAX6712REXS
- Part No.:
- MAX6712REXS
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6712REXS.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,524
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Product details
Overview
MAX6712REXS from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit designed to monitor +3.0V power supplies in embedded digital systems. It provides precision reset threshold of 2.63V ±1.5%, guaranteed reset assertion for VCC down to +1V, and a minimum 140ms power-on reset pulse width. Used in portable controllers and battery-powered instrumentation where low supply current (12µA) and manual reset capability are critical.
For engineers reviewing the MAX6712REXS datasheet, MAX6712REXS pinout, MAX6712REXS application, or MAX6712REXS equivalent, this page delivers verified electrical behavior, SC70-4 package mapping, reset timing under temperature variation, MR debounce characteristics, and validated alternatives for 3.0V-supply monitoring applications.
Technical Context
The MAX6712REXS implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.63V, asserting active-high RESET for ≥140ms after recovery. Its internal 20kΩ pull-up on MR enables direct switch-to-ground connection without external components.
Reset output is push-pull with VOH ≥0.8·VCC at ISOURCE = 500µA and VOL ≤0.3V at ISINK = 1.2mA - ensuring reliable interface with 3.0V µP reset inputs. The device operates across –40°C to +125°C and maintains valid reset state down to VCC = +1V, with immunity to transients ≤20µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.5% at TA = +25°C; ensures reliable brownout detection before 3.0V supply falls below 3.0×0.9 = 2.7V |
| Reset Pulse Width | ≥140ms min after VCC rise; meets JEDEC JESD8-12B power-up timing requirements for 3.0V µPs |
| Supply Current | 12µA typical at +25°C; enables >1-year battery life in coin-cell–powered instrumentation |
| VCC Operating Range | +1.0V to +5.5V; guarantees functional reset output even during deep brownout or partial power loss |
| MR Input Threshold | VIL ≤0.3·VCC, VIH ≥0.7·VCC; compatible with 3.0V CMOS logic and open-drain drivers |
| Output Type | Active-high push-pull; eliminates need for external pull-up and supports direct drive of µP reset pins |
| Temperature Range | –40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6712REXS is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained portable designs. Pin 1 is RESET (active-high output), Pin 2 is GND, Pin 3 is MR (active-low manual reset input), and Pin 4 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull reset output | Drives µP reset pin directly; sinks 1.2mA or sources 500µA; no external pull-up required |
| 2 - GND | Ground reference | Return path for all internal circuitry and MR input; must be low-impedance for transient immunity |
| 3 - MR | Active-low manual reset input | Internally pulled up to VCC via 20kΩ; debounced by 140ms timeout; accepts TTL/CMOS levels |
| 4 - VCC | Supply voltage input | Accepts +1.0V to +5.5V; powers internal comparator and output stage; monitored for reset generation |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.0V supply monitoring | 2.63V reset threshold with ±1.5% tolerance over –40°C to +125°C ensures deterministic brownout response |
| No external components required | Integrated MR pull-up, precision reference, and push-pull driver eliminate discrete resistors, capacitors, and comparators |
| Guaranteed reset validity to VCC = +1V | RESET remains asserted until VCC rises above 2.63V and stays valid down to 1V - critical for fail-safe shutdown |
| Transient immunity | Rejects VCC glitches ≤20µs wide at 100mV overdrive, preventing spurious resets in noisy power environments |
| Manual reset with built-in debounce | 140ms MR deassertion delay eliminates need for RC networks or firmware debouncing logic |
Applications
| Industrial Controller Monitoring | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: PLC I/O modules powered from regulated 3.0V rails subject to intermittent brownouts during field operation. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to hold controller in reset until stable 3.0V is confirmed. Use Value: Prevents corrupted register writes or invalid state transitions during undervoltage events; 140ms timeout exceeds µP power-up stabilization time. |
Use Scenario: Handheld glucose meter using CR2032 coin cell with voltage decay from 3.0V to 2.2V over battery life. IC Role / Device Role / Timing Role: Monitors 3.0V rail and triggers controlled shutdown before ADC or display malfunction occurs. Use Value: 12µA quiescent current extends battery life; 2.63V threshold aligns with safe operating margin for 3.0V system logic. |
| Automotive Body Control Module | Smart Sensor Node |
|
Use Scenario: Under-dash BCM exposed to cold cranking (VCC dip to 2.4V) and load dump transients. IC Role / Device Role / Timing Role: Provides robust reset signaling during cold-crank recovery, with immunity to sub-20µs VCC dips. Use Value: –40°C to +125°C rating and 2.63V threshold ensure reliable operation across full automotive temperature range. |
Use Scenario: Wireless environmental sensor node powered by energy harvesting with variable 3.0V output. IC Role / Device Role / Timing Role: Generates clean reset pulse when harvested voltage crosses 2.63V, enabling deterministic wake-up sequence. Use Value: Push-pull output drives RF SoC reset pin directly; no level-shifting needed; 140ms pulse accommodates slow-ramping sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6712SEXS | 2.93V reset threshold; same SC70-4 package, push-pull output, and 140ms timeout | Targeted for +3.3V systems instead of +3.0V; requires validation if supply nominal is 3.0V ±5% | Select when monitoring 3.3V rails; verify system brownout margin against 2.93V vs. 2.63V threshold |
| TPS3808G18DBVR | 2.64V threshold, 200ms reset timeout, 1.5µA IQ, SOT-23-5 package with enable pin | Includes enable input for power sequencing; higher accuracy (±0.5%) but larger footprint and different pinout | Choose for ultra-low-power designs requiring <2µA supply current or sequenced enable control |
Compared with MAX6712SEXS, MAX6712REXS offers tighter alignment with 3.0V nominal supply brownout margins; versus TPS3808G18DBVR, it trades lower quiescent current for smaller SC70-4 footprint and simpler 4-pin interface - ideal for cost- and space-sensitive 3.0V µP supervision.
Availability
MAX6712REXS is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and automotive body electronics requiring stable component supply with guaranteed long-term availability and lead-free compliance.
Supply support for MAX6712REXS 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX671x family was designed specifically for reliable, low-component-count power-supply supervision in space-constrained, battery-sensitive embedded systems operating across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6712REXS and how does it vary with temperature?
The MAX6712REXS has a nominal reset threshold of 2.63V at +25°C, with ±1.5% tolerance over –40°C to +125°C. Temperature coefficient is specified as ≤50ppm/°C, resulting in maximum deviation of ±13mV across the full range. This ensures deterministic reset behavior for 3.0V systems where brownout must occur before supply falls below 2.7V.
Does MAX6712REXS require an external pull-up resistor on its RESET pin?
No, MAX6712REXS does not require an external pull-up resistor because it features an active-high push-pull output stage. The RESET pin can directly drive the reset input of a microprocessor without additional components, simplifying PCB layout and reducing BOM count.
How does the manual reset (MR) input behave on MAX6712REXS during power-up?
On MAX6712REXS, the MR input has an internal 20kΩ pull-up to VCC, so it defaults high at power-up. When pulled low via switch or logic, RESET asserts immediately and remains asserted for at least 140ms after MR returns high - providing hardware-level debounce independent of firmware.
Can MAX6712REXS operate reliably when VCC drops below 2.0V?
Yes, MAX6712REXS guarantees functional reset assertion down to VCC = +1.0V. Below 1.0V, the internal circuitry ceases operation, but the RESET output remains latched in its last valid state - ensuring fail-safe behavior during deep brownout conditions common in battery-powered systems.
What is the maximum transient immunity of MAX6712REXS on the VCC pin?
MAX6712REXS rejects negative-going VCC transients ≤20µs wide when the overdrive (VTH – VCC) is ≤100mV, per Figure 1 in the datasheet. This immunity prevents false resets caused by switching noise or load transients in electrically noisy environments such as motor control or automotive applications.
MAX6712REXS 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:
- 2.63V
- 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
MAX6712REXS FAQ
1.How can I place an order for MAX6712REXS through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6712REXS 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 MAX6712REXS reliable?
The price and inventory of MAX6712REXS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6712REXS is usually 5 days.
3.What payment methods are accepted for MAX6712REXS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6712REXS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6712REXS?
MAX6712REXS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6712REXS 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 MAX6712REXS?
For technical support, including MAX6712REXS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6712REXS requirements.
6.How does Aetrix verify that MAX6712REXS is sourced from the original manufacturer or authorized distributors?
All MAX6712REXS 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 MAX6712REXS meets industry standards.
7.What is the process for return or replacement of MAX6712REXS?
All MAX6712REXS units undergo pre-shipment inspection (PSI). If there is an issue with MAX6712REXS, 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 MAX6712REXS part is unused and in its original packaging.
Return procedure for MAX6712REXS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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