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Analog Devices Inc./Maxim Integrated MAX6724AUTTGD3+
- Part No.:
- MAX6724AUTTGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6724AUTTGD3+.pdf
- Description:
- DUAL/TRIPLE, ULTRA-LOW-VOLTAGE,
- Quantity:
- Payment:
- Shipping:
Inventory:721
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Product details
Overview
The MAX6724AUTTGD3+ from Maxim Integrated is a dual-voltage, ultra-low-voltage microprocessor supervisory circuit in 6-pin SOT23 package, designed to monitor VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 4.625V and 3.075V respectively, 210ms minimum reset timeout, push-pull active-low RST output, and integrated watchdog timer with 35s startup and 1.12s normal timeout. It ensures reliable system reset during power-up, brownout, or fault conditions in battery-powered and industrial embedded systems.
For engineers reviewing the MAX6724AUTTGD3+ datasheet, MAX6724AUTTGD3+ pinout, MAX6724AUTTGD3+ application, or MAX6724AUTTGD3+ equivalent, key selection criteria include dual-supply monitoring capability down to 0.8V VCC operation, guaranteed reset validity across -40°C to +125°C, low 14µA typical supply current at 3.6V, and compatibility with manual-reset, watchdog, and power-fail interface requirements.
Technical Context
This device implements dual independent voltage comparators with hysteresis (0.5% typical), a precision internal 626.5mV reference for RSTIN/PFI inputs, and a dual-mode watchdog timer that enforces a 35s minimum initial window after reset before transitioning to 1.12s normal timeout. Reset assertion occurs on any monitored supply falling below its threshold, MR low pulse, or WDI timeout - with reset held active for the full timeout period after recovery.
The push-pull RST output is referenced to VCC1 and guarantees VOL ≤ 0.4V at ISINK = 3.2mA (VCC1 ≥ 4.5V); RST2 (if present) is referenced to VCC2. The device operates with VCC1/VCC2 as low as 0.8V while maintaining valid reset logic state, and features immunity to short VCC transients via built-in glitch rejection (100ns MR/WDI pulse rejection, 20µs VCC-to-RST delay).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, falling edge; enables reliable reset assertion for 5V rail monitoring) |
| VCC2 Threshold | 3.075V (factory-trimmed, falling edge; supports 3.3V I/O supply supervision) |
| Reset Timeout | 210ms minimum (ensures µP completes boot sequence before release) |
| Supply Current | 14µA typical at 3.6V (enables long battery life in portable equipment) |
| Operating Temp | -40°C to +125°C (qualified for automotive under-hood and industrial control environments) |
| Watchdog Modes | 35s startup + 1.12s normal timeout (prevents false resets during boot, enables fast fault detection in runtime) |
| Reset Output Type | Push-pull active-low RST (eliminates need for external pullup; drives directly into µP reset pin) |
Pinout & Package
MAX6724AUTTGD3+ uses a 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm height) with gull-wing leads, RoHS-compliant and lead-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST / RST1 | Active-low push-pull reset output referenced to VCC1; asserts when VCC1/VCC2 drop below threshold, MR pulled low, or WDI timeout occurs |
| 2 | GND | Ground reference for all internal comparators, timers, and outputs |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; forces reset when pulled low for ≥1µs |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal circuitry when > VCC1 and sets VCC2 reset threshold reference |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers device when > VCC2 and sets VCC1 reset threshold reference |
| 6 | WDI | Watchdog input; reset triggered if no edge detected for >35s (startup) or >1.12s (normal mode); unconnected disables watchdog |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of primary (VCC1) and secondary (VCC2) rails with separate thresholds and hysteresis |
| Guaranteed reset validity down to 0.8V | Ensures correct reset logic state even during deep brownout - critical for fail-safe shutdown in industrial systems |
| Dual-mode watchdog timer | 35s startup window prevents spurious reset during boot; 1.12s runtime timeout detects software hangs rapidly |
| Low quiescent current | 14µA typical at 3.6V enables multi-year operation on coin-cell batteries in IoT sensors and wearables |
| Push-pull RST output | Eliminates external pullup resistor, reduces BOM count, and improves noise immunity vs. open-drain alternatives |
Applications
| Industrial PLC Controller | Automotive ADAS Camera Module |
|---|---|
|
Use Scenario: Monitors 5V main power and 3.3V I/O rail in programmable logic controller operating in harsh factory environments with wide temperature swings and EMI. IC Role / Device Role: Dual-supply supervisor ensuring deterministic reset during cold-start, brownout, or transient overload events. Use Value: Prevents firmware corruption by holding µP in reset until both supplies stabilize above 4.625V and 3.075V for ≥210ms - meeting IEC 61000-4-4 immunity requirements. |
Use Scenario: Supervises 5V camera sensor supply and 3.3V image processor core voltage in automotive surround-view system exposed to -40°C to +105°C ambient. IC Role / Device Role: Fault-tolerant reset generator with extended temperature range and watchdog enforcement of real-time processing deadlines. Use Value: Guarantees reset assertion during cold cranking (VCC1 dip to 0.8V) and detects software lockup via 1.12s watchdog timeout - satisfying ISO 26262 ASIL-B functional safety constraints. |
| Medical Infusion Pump | 5G Small Cell Baseband Unit |
|
Use Scenario: Ensures safe power-on sequencing and continuous supervision of 3.3V microcontroller and 5V motor driver supplies in Class II medical device. IC Role / Device Role: Safety-critical supervisory IC with manual-reset override for clinical technician intervention and watchdog-enforced firmware health check. Use Value: Internal 50kΩ MR pullup eliminates external components; 210ms timeout aligns with FDA-required boot validation window; 14µA ICC enables battery backup operation >72 hours. |
Use Scenario: Monitors 12V DC-DC output (scaled to 4.625V) and 3.3V FPGA configuration rail in outdoor 5G small cell requiring high reliability and thermal resilience. IC Role / Device Role: Dual-rail supervisor with precise threshold matching and watchdog co-monitoring of baseband processor activity. Use Value: Factory-trimmed 4.625V/3.075V thresholds eliminate calibration; 35s watchdog startup accommodates FPGA bitstream loading; -40°C to +125°C rating supports uncooled enclosure deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTLTD3+ | Same 6-pin SOT23 package, identical 4.625V/3.075V thresholds and 210ms timeout, but lacks watchdog timer and WDI pin | Suitable only where software-level fault detection suffices; cannot replace MAX6724AUTTGD3+ in watchdog-dependent designs | Select when cost reduction is prioritized over watchdog functionality and system complexity allows external supervision of processor activity |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only), 200ms timeout, no VCC2 monitoring or WDI; 5-pin SOT23 package | Requires separate IC for VCC1 supervision; no triple-monitoring capability or adjustable RSTIN input | Choose only for simple single-rail systems where dual-supply coordination is unnecessary and footprint minimization is critical |
Compared with MAX6720AUTLTD3+, the MAX6724AUTTGD3+ adds essential watchdog functionality for runtime software integrity verification; versus TPS3808G33DBVR, it provides true dual-rail supervision with independent thresholds and wider operating voltage range - making it indispensable for complex embedded systems requiring coordinated power sequencing and fault response.
Availability
MAX6724AUTTGD3+ is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive ADAS modules, medical infusion pumps, and 5G small cell baseband units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6724AUTTGD3+ 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, communications, and computing markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, dual/triple-supply supervisory circuits optimized for space-constrained, thermally demanding applications where guaranteed reset behavior down to 0.8V and robust watchdog enforcement are mandatory.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6724AUTTGD3+?
The MAX6724AUTTGD3+ has factory-trimmed reset thresholds of 4.625V for VCC1 (primary supply) and 3.075V for VCC2 (secondary supply), specified at falling edge with ±1.5% tolerance over -40°C to +125°C. These values are encoded in the part number suffix "TG" per Maxim's Reset Voltage Threshold Suffix Guide and are validated across temperature and supply variations.
Does the MAX6724AUTTGD3+ support manual reset functionality?
Yes, the MAX6724AUTTGD3+ includes an active-low manual-reset input (MR) on Pin 3 with internal 50kΩ pullup to VCC1. Pulling MR low for ≥1µs forces reset assertion; reset remains active for the full 210ms timeout period after MR returns high. This enables field service reset, test-mode entry, or operator-initiated recovery without power cycling.
What watchdog timeout modes does the MAX6724AUTTGD3+ provide?
The MAX6724AUTTGD3+ implements a dual-mode watchdog: a 35s minimum startup timeout after any reset event (power-up, MR, or watchdog timeout), followed by a 1.12s minimum normal-mode timeout after the first valid WDI edge. This architecture prevents false resets during boot while enabling rapid detection of software hangs during steady-state operation.
Can the MAX6724AUTTGD3+ monitor a third voltage rail?
No, the MAX6724AUTTGD3+ is a dual-supply supervisor (VCC1 and VCC2 only) and does not include the RSTIN input required for auxiliary voltage monitoring. For triple-voltage supervision, consider MAX6723A/MAX6724A variants with RSTIN pin - the MAX6724AUTTGD3+ omits this pin and associated comparator circuitry per its specific ordering configuration.
What is the operating temperature range and supply voltage range for the MAX6724AUTTGD3+?
The MAX6724AUTTGD3+ operates from -40°C to +125°C and supports supply voltages from 0.8V to 5.5V on both VCC1 and VCC2 pins. Its reset output logic state is guaranteed valid even when either supply drops to 0.8V - a critical feature for brownout resilience in automotive and industrial applications.
MAX6724AUTTGD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.11V, 3.075V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6724AUTTGD3+ FAQ
1.How can I place an order for MAX6724AUTTGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6724AUTTGD3+ 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 MAX6724AUTTGD3+ reliable?
The price and inventory of MAX6724AUTTGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6724AUTTGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6724AUTTGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6724AUTTGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6724AUTTGD3+?
MAX6724AUTTGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6724AUTTGD3+ 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 MAX6724AUTTGD3+?
For technical support, including MAX6724AUTTGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6724AUTTGD3+ requirements.
6.How does Aetrix verify that MAX6724AUTTGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6724AUTTGD3+ 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 MAX6724AUTTGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6724AUTTGD3+?
All MAX6724AUTTGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6724AUTTGD3+, 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 MAX6724AUTTGD3+ part is unused and in its original packaging.
Return procedure for MAX6724AUTTGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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