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Analog Devices Inc./Maxim Integrated MAX6724UTSHD3
- Part No.:
- MAX6724UTSHD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6724UTSHD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6724UTSHD3 from Maxim Integrated is a dual-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring VCC1 (primary supply) at 3.075V threshold and VCC2 (secondary supply) at 2.925V threshold with 210ms minimum reset timeout. It features push-pull active-low RST output, manual-reset input (MR), watchdog timer (35s startup / 1.12s normal), and operates from -40°C to +125°C. Used in telecom power management to ensure reliable boot and brownout recovery.
For engineers reviewing the MAX6724UTSHD3 datasheet, MAX6724UTSHD3 pinout, MAX6724UTSHD3 application, or MAX6724UTSHD3 equivalent, key selection criteria include dual-supply voltage thresholds (VTH1 = 3.075V, VTH2 = 2.925V), guaranteed reset validity down to VCC ≥ 0.8V, low 14µA typical supply current at 3.6V, watchdog disable capability via open WDI, and SOT23-6 packaging for space-constrained embedded systems.
Technical Context
The MAX6724UTSHD3 implements independent comparators for VCC1 and VCC2 with factory-trimmed thresholds (3.075V and 2.925V respectively), hysteresis of 0.5% of VTH, and temperature coefficient of 20ppm/°C. Its reset logic asserts RST low when either supply falls below its threshold and holds for 210ms min after both supplies recover.
It integrates a dual-mode watchdog timer: 35s minimum startup period after reset, followed by 1.12s minimum normal timeout; WDI transitions clear the timer. MR input includes internal 50kΩ pullup to VCC1 and supports CMOS-level triggering with 1µs minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 3.075V (factory-trimmed, ±0.075V tolerance) - sets primary supply undervoltage detection point |
| VCC2 Reset Threshold | 2.925V (factory-trimmed, ±0.075V tolerance) - sets secondary supply undervoltage detection point |
| Reset Timeout Period | 210ms (min) - ensures µP remains held in reset long enough for stable power recovery |
| Supply Current | 14µA (typ at 3.6V) - enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Reset Output Type | Push-pull active-low RST - eliminates need for external pullup; referenced to VCC1 |
| Watchdog Timeout | 35s (startup), 1.12s (normal) - accommodates lengthy boot sequences then enforces tight runtime supervision |
Pinout & Package
Package: 6-pin SOT23 (3.0mm × 1.7mm × 1.3mm height), RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low on VCC1/VCC2 undervoltage, MR low, or watchdog timeout |
| 2 - GND | Ground reference | Common return for all internal circuitry and comparator references |
| 3 - MR | Active-low manual-reset input | Internal 50kΩ pullup to VCC1; 1µs minimum pulse width required to trigger reset |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when > VCC1; monitored at 2.925V threshold |
| 5 - VCC1 | Primary supply input | Main power rail input; monitored at 3.075V threshold; powers RST output stage |
| 6 - WDI | Watchdog input | Edge-sensitive; unconnected state disables watchdog; 200nA internal bias current |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (3.075V) and VCC2 (2.925V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity down to 0.8V | Ensures correct RST logic state even during deep brownout conditions where VCC1 or VCC2 drops to 0.8V |
| Immunity to short VCC transients | Rejects glitches <20µs wide (at 100mV overdrive), preventing spurious resets in noisy power environments |
| Low quiescent current | 14µA typical at 3.6V enables use in always-on subsystems without compromising battery life |
| Configurable watchdog behavior | Long 35s startup window avoids false timeout during boot; 1.12s runtime timeout ensures rapid fault detection |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring dual DC-DC outputs (e.g., 3.3V core and 2.8V I/O rails) in 4G/5G base station power supplies. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RST until both rails stabilize post-power-up or during brownout. Use Value: Prevents FPGA or DSP corruption by holding reset for ≥210ms while ensuring valid reset assertion down to 0.8V on either rail. | Use Scenario: Supervising isolated 24V field bus and 3.3V logic supply in programmable logic controller backplane modules. IC Role / Device Role / Timing Role: Primary voltage monitor (VCC1 = 3.075V) for 3.3V logic rail; secondary monitor (VCC2 = 2.925V) for regulated 24V-to-5V converter output. Use Value: Enables deterministic system restart after transient overvoltage events on field wiring, with MR support for field-service reset. |
| Automotive Infotainment Head Units | Medical Diagnostic Imaging Subsystems |
Use Scenario: Validating 12V-to-3.3V and 12V-to-1.8V DC-DC converters powering SoC and memory in infotainment ECUs. IC Role / Device Role / Timing Role: Dual-rail supervisor with -40°C to +125°C rating; RST drives SoC reset pin directly via push-pull output. Use Value: Guarantees clean boot sequence across automotive temperature extremes and rejects engine cranking transients (<20µs). | Use Scenario: Monitoring redundant 5V and 3.3V supplies feeding FPGA-based image processing pipelines in ultrasound or MRI subsystems. IC Role / Device Role / Timing Role: Dual-supply watchdog supervisor using WDI to verify real-time firmware execution integrity. Use Value: Combines 210ms reset hold time with 1.12s watchdog timeout to detect both power faults and software hangs without external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6723UTSHD3 | Same package and pinout; VCC1 = 2.925V, VCC2 = 2.625V; identical 210ms timeout and watchdog specs | Suitable where lower primary threshold (2.925V vs. 3.075V) better matches 3.0V nominal rail tolerances | Select MAX6723UTSHD3 if system VCC1 nominal is 3.0V ±3%; MAX6724UTSHD3 fits 3.3V ±5% rails. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no VCC2 input; 200ms timeout; 2.5µA IQ; SOT23-6 | Lacks dual-monitoring capability; requires external circuitry to supervise second rail | Choose only if monitoring one rail suffices and ultra-low 2.5µA supply current is critical; not drop-in for dual-rail designs. |
Compared with MAX6723UTSHD3 and TPS3808G33DBVR, the MAX6724UTSHD3 uniquely delivers matched dual-threshold supervision (3.075V/2.925V) in a single SOT23-6 IC with integrated watchdog and MR-enabling compact, robust power sequencing without external comparators or timing components.
Availability
MAX6724UTSHD3 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, automotive infotainment, and medical imaging systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6724UTSHD3 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 high-reliability ICs for demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, dual/triple-supply microprocessor supervisors optimized for multirail systems where space, power, and thermal resilience are critical-targeting telecom, servers, and automotive control units.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6724UTSHD3?
The MAX6724UTSHD3 has factory-trimmed reset thresholds of 3.075V (±0.075V) for VCC1 and 2.925V (±0.075V) for VCC2, as defined by the "SH" suffix in its part number per Maxim's Reset Voltage Threshold Suffix Guide. These values are guaranteed over -40°C to +125°C and include 0.5% hysteresis referenced to each threshold.
Does the MAX6724UTSHD3 support watchdog functionality, and how is it configured?
Yes, the MAX6724UTSHD3 includes a dual-mode watchdog timer with 35s minimum startup period and 1.12s minimum normal timeout. It is enabled by connecting WDI (pin 6) to a µP I/O line; leaving WDI unconnected disables the watchdog. The timer clears on any WDI edge transition and asserts RST if no transition occurs within the timeout window.
Can the MAX6724UTSHD3 monitor three voltage rails?
No-the MAX6724UTSHD3 is a dual-supply supervisor monitoring only VCC1 and VCC2. While the broader MAX6719A–MAX6727A family supports RSTIN for third-rail monitoring, the MAX6724UTSHD3 does not include the RSTIN pin or associated circuitry; its pinout is fixed to six terminals (RST, GND, MR, VCC2, VCC1, WDI).
What is the reset output type and drive capability of the MAX6724UTSHD3?
The MAX6724UTSHD3 provides a push-pull active-low RST output (pin 1) referenced to VCC1. It sources up to 800µA at VOH = 0.8×VCC1 and sinks up to 3.2mA at VOL ≤ 0.4V (for VCC1 ≥ 4.5V), eliminating the need for an external pullup resistor and enabling direct interface to most µP reset inputs.
Is the MAX6724UTSHD3 qualified for automotive applications?
The MAX6724UTSHD3 operates over -40°C to +125°C and is built on Maxim's high-reliability process, but it is not AEC-Q100 qualified. For automotive-grade alternatives, consider the AEC-Q100 qualified MAX6719AUTTWD1/V+T (same family, different thresholds/timing). The MAX6724UTSHD3 is suited for industrial and telecom applications meeting extended temperature requirements.
MAX6724UTSHD3 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:
- 1.313V, 2.925V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6724UTSHD3 FAQ
1.How can I place an order for MAX6724UTSHD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6724UTSHD3 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 MAX6724UTSHD3 reliable?
The price and inventory of MAX6724UTSHD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6724UTSHD3 is usually 5 days.
3.What payment methods are accepted for MAX6724UTSHD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6724UTSHD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6724UTSHD3?
MAX6724UTSHD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6724UTSHD3 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 MAX6724UTSHD3?
For technical support, including MAX6724UTSHD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6724UTSHD3 requirements.
6.How does Aetrix verify that MAX6724UTSHD3 is sourced from the original manufacturer or authorized distributors?
All MAX6724UTSHD3 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 MAX6724UTSHD3 meets industry standards.
7.What is the process for return or replacement of MAX6724UTSHD3?
All MAX6724UTSHD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6724UTSHD3, 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 MAX6724UTSHD3 part is unused and in its original packaging.
Return procedure for MAX6724UTSHD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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