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Analog Devices Inc./Maxim Integrated MAX6724UTSDD3
- Part No.:
- MAX6724UTSDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6724UTSDD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:742
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Product details
Overview
MAX6724UTSDD3 from Maxim Integrated is a dual-voltage microprocessor supervisory IC monitoring VCC1 (primary) and VCC2 (secondary) supplies, with factory-trimmed reset thresholds (VTH1 = 2.925 V, VTH2 = 1.388 V), 210 ms minimum reset timeout, push-pull active-low RST output, and watchdog timer support. It ensures reliable system reset in multivoltage embedded systems operating from -40°C to +125°C.
For engineers reviewing the MAX6724UTSDD3 datasheet, MAX6724UTSDD3 pinout, MAX6724UTSDD3 application, or MAX6724UTSDD3 equivalent, this page delivers verified electrical specs, SOT23-6 package layout, dual-supply monitoring behavior, watchdog startup timing (35 s min initial, 1.12 s min normal), and design-meaningful alternatives for industrial and telecom power management.
Technical Context
The MAX6724UTSDD3 integrates two independent voltage comparators with ±0.5% hysteresis, a programmable reset timeout timer (D3 suffix = 140–280 ms), and a dual-mode watchdog (35 s startup / 1.12 s normal). Its internal reference (626.5 mV) enables precise threshold detection down to 0.8 V on either supply rail.
It features push-pull RST referenced to VCC1, manual-reset input (MR) with 50 kΩ internal pullup, and guaranteed valid reset assertion even when VCC1 or VCC2 drops to 0.8 V - critical for brownout resilience in automotive-grade applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 2.925 V (typ), factory-trimmed 'S' suffix - sets primary supply fault detection point for 3.0 V–3.3 V systems |
| VCC2 Reset Threshold | 1.388 V (typ), factory-trimmed 'I' suffix - monitors secondary rails like 1.2 V/1.5 V core supplies |
| Reset Timeout Period | 210 ms (typ), D3 suffix - ensures sufficient hold time for full μP initialization after power recovery |
| Supply Current | 10 µA (typ) at 3.6 V - enables ultra-low-power operation in battery-backed or always-on systems |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial control, and telecom base station environments |
| Watchdog Timeout | 35 s (min) startup / 1.12 s (min) normal mode - accommodates long boot sequences then enforces tight software execution checks |
| Reset Output Type | Push-pull, active-low RST - eliminates need for external pullup and provides clean, rail-referenced logic drive |
Pinout & Package
MAX6724UTSDD3 is housed in a 6-pin SOT23 package (3.0 mm × 1.7 mm × 1.3 mm), RoHS-compliant and lead-free. Pin 1 is marked with a dot; pin numbering follows standard SOT23 counterclockwise orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1 - asserts low during VCC1/VCC2 undervoltage, MR activation, or watchdog timeout |
| 2 | GND | Analog/digital ground reference - must be connected to system common ground plane for stable comparator operation |
| 3 | MR | Active-low manual-reset input with 50 kΩ internal pullup to VCC1 - debounced by design; no external RC needed |
| 4 | VCC2 | Secondary supply input (0.8–5.5 V) - powers internal circuitry when above VCC1 and defines VTH2 monitoring range |
| 5 | VCC1 | Primary supply input (0.8–5.5 V) - powers device when above VCC2 and defines VTH1 monitoring range and RST output reference |
| 6 | WDI | Watchdog input - rising/falling edge clears timer; unconnected state disables watchdog via 200 nA current-source detection |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (2.925 V) and VCC2 (1.388 V) supervision with separate thresholds - eliminates need for two discrete supervisors |
| Guaranteed reset validity down to 0.8 V | Ensures deterministic reset assertion even during deep brownout conditions - critical for fail-safe embedded firmware recovery |
| Dual-mode watchdog timer | 35 s startup window allows full system boot before enabling strict 1.12 s watchdog enforcement - prevents false resets during initialization |
| Immunity to short VCC transients | Rejects <20 µs negative glitches below threshold - avoids spurious resets in noisy power environments without added filtering |
| Low 10 µA supply current | Reduces quiescent load on backup batteries or energy-harvested rails - extends maintenance-free operation in IoT edge nodes |
Applications
| Industrial PLC Power Management | Telecom Line Card Supervision |
|---|---|
Use Scenario: Monitoring 3.3 V I/O and 1.2 V FPGA core supplies in programmable logic controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset across both rails upon any undervoltage event, with 210 ms timeout ensuring FPGA configuration stability. Use Value: Prevents partial configuration lockup by guaranteeing coordinated reset of all voltage domains before firmware restart. |
Use Scenario: Ensuring reliable boot and runtime supervision of dual-rail power supplies (5 V analog, 3.3 V digital) in carrier-grade Ethernet line cards. IC Role / Device Role / Timing Role: Provides VCC1/VCC2 monitoring plus WDI-driven watchdog to detect stalled firmware during packet processing. Use Value: Enables autonomous recovery from software hangs without host CPU intervention - improving network uptime SLA compliance. |
| Automotive Infotainment Head Unit | Medical Portable Diagnostic Device |
Use Scenario: Supervising 5 V USB interface and 1.8 V SoC core supplies in infotainment units subjected to cold-crank (4.5 V) and load-dump (18 V) transients. IC Role / Device Role / Timing Role: Monitors both rails independently; push-pull RST drives processor reset with rail-referenced logic despite VCC1 variation. Use Value: Maintains reset integrity during battery voltage sag - preventing corrupted display rendering or audio buffer underruns. |
Use Scenario: Managing power sequencing and fault detection in handheld ultrasound devices powered by Li-ion batteries (3.0–4.2 V) with regulated 1.2 V DSP core. IC Role / Device Role / Timing Role: Detects battery depletion (VCC1 drop) and DSP rail collapse (VCC2 drop), triggering controlled shutdown before data loss. Use Value: Guarantees safe termination of image acquisition and flash write operations - preserving diagnostic integrity and regulatory compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6723UTSDD3 | Same SOT23-6 package, identical VTH1/VTH2 (2.925 V / 1.388 V) and D3 timeout, but open-drain RST output requiring external pullup | Lacks push-pull drive - unsuitable where low-impedance reset assertion or rail-referenced high-state is required | Select MAX6723UTSDD3 only if board layout already includes pullup resistor and system reset input tolerates weak-high states |
| TPS3808G33DBVR | Single-supply supervisor (3.3 V fixed threshold), no VCC2 monitoring, no WDI, 200 ms timeout, SOT23-6 package | Cannot monitor secondary rail or provide watchdog - requires additional components for dual-rail or safety-critical applications | Choose TPS3808G33DBVR only for cost-sensitive single-rail systems where VCC2 supervision and watchdog are unnecessary |
Compared with MAX6724UTSDD3, MAX6723UTSDD3 trades push-pull drive for open-drain flexibility, while TPS3808G33DBVR reduces functionality to single-rail supervision - making MAX6724UTSDD3 the only option supporting true dual-voltage monitoring with integrated watchdog in a 6-pin SOT23.
Availability
MAX6724UTSDD3 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, automotive infotainment head units, and portable medical diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6724UTSDD3 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 communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, multi-rail supervisory circuits optimized for reliability-critical embedded systems where simultaneous VCC1/VCC2 monitoring and deterministic reset behavior are mandatory.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6724UTSDD3?
The MAX6724UTSDD3 has factory-trimmed reset thresholds: VCC1 threshold is 2.925 V (typical, 'S' suffix), and VCC2 threshold is 1.388 V (typical, 'I' suffix). These values are specified over -40°C to +125°C and include ±0.5% hysteresis. The MAX6724UTSDD3 uses these precise thresholds to detect undervoltage faults on primary and secondary rails without external adjustment.
Does the MAX6724UTSDD3 support watchdog functionality, and how is it configured?
Yes, the MAX6724UTSDD3 includes a dual-mode watchdog timer accessible via the WDI pin. It features a 35 s minimum startup period after reset, followed by a 1.12 s minimum normal timeout. To enable it, drive WDI with periodic edges; leave WDI unconnected to disable. The MAX6724UTSDD3's watchdog is fully integrated and requires no external components.
What package type and pin count does the MAX6724UTSDD3 use?
The MAX6724UTSDD3 is supplied in a 6-pin SOT23 package (3.0 mm × 1.7 mm footprint), RoHS-compliant and lead-free. Pin 1 is marked with a dot; pinout includes RST (push-pull), GND, MR, VCC2, VCC1, and WDI. This compact package supports high-density PCB layouts in space-constrained applications like telecom modules and portable medical devices.
How does the MAX6724UTSDD3 ensure reset validity during low-voltage conditions?
The MAX6724UTSDD3 guarantees valid reset output logic state down to VCC1 or VCC2 = 0.8 V - verified across temperature. Its internal architecture maintains comparator accuracy and output drive strength at ultralow supply levels. This ensures deterministic reset assertion during brownout events where many supervisors fail, making the MAX6724UTSDD3 suitable for automotive and industrial environments.
Is the MAX6724UTSDD3 compatible with manual reset inputs, and what is the MR pin behavior?
Yes, the MAX6724UTSDD3 includes an active-low MR (manual reset) input with a 50 kΩ internal pullup to VCC1. Pulling MR low forces reset assertion for the full timeout period (210 ms typ), even if supplies remain nominal. The MAX6724UTSDD3 requires no external debounce components - a simple momentary switch to GND suffices for field service or test-mode resets.
MAX6724UTSDD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 0.788V, 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
MAX6724UTSDD3 FAQ
1.How can I place an order for MAX6724UTSDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6724UTSDD3 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 MAX6724UTSDD3 reliable?
The price and inventory of MAX6724UTSDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6724UTSDD3 is usually 5 days.
3.What payment methods are accepted for MAX6724UTSDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6724UTSDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6724UTSDD3?
MAX6724UTSDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6724UTSDD3 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 MAX6724UTSDD3?
For technical support, including MAX6724UTSDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6724UTSDD3 requirements.
6.How does Aetrix verify that MAX6724UTSDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6724UTSDD3 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 MAX6724UTSDD3 meets industry standards.
7.What is the process for return or replacement of MAX6724UTSDD3?
All MAX6724UTSDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6724UTSDD3, 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 MAX6724UTSDD3 part is unused and in its original packaging.
Return procedure for MAX6724UTSDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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