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Analog Devices Inc./Maxim Integrated MAX6726AKATGD3+T
- Part No.:
- MAX6726AKATGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6726AKATGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6726AKATGD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), respectively, and featuring a 280ms minimum reset timeout period (D5 suffix). It asserts active-low push-pull RST/RST1 and RST2 outputs when either supply falls below threshold, supporting reliable power-up sequencing and brownout detection in multivoltage embedded systems.
For engineers reviewing the MAX6726AKATGD3+T datasheet, MAX6726AKATGD3+T pinout, MAX6726AKATGD3+T application, or MAX6726AKATGD3+T equivalent, key selection considerations include its dual-supply monitoring capability, guaranteed reset validity down to VCC1/VCC2 = 0.8V, push-pull output drive referenced to VCC1/VCC2, 14µA typical supply current at 3.6V, and AEC-Q100-qualified variants in the same family for automotive use.
Technical Context
The MAX6726AKATGD3+T implements independent voltage comparators for VCC1 and VCC2, each with ±0.5% hysteresis and 20ppm/°C tempco, ensuring stable reset assertion across -40°C to +125°C. Its internal reset timeout timer (280ms min) restarts on any threshold violation before expiration, enabling robust response to transient supply dips.
This variant includes push-pull RST1 (referenced to VCC1) and RST2 (referenced to VCC2), manual-reset input (MR) with 50kΩ internal pullup to VCC1, and supports watchdog disable via open WDI pin. It does not include RSTIN, PFI, PFO, or WDI functionality - confirmed by its MAX6725A/MAX6726A product grouping and pin mapping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), factory-trimmed; ensures reliable reset assertion during 5V rail brownout |
| VCC2 Reset Threshold | 3.075V (typ), factory-trimmed; enables precise monitoring of 3.3V auxiliary supply |
| Reset Timeout Period | 280ms (min); provides sufficient hold time for full μP initialization after power recovery |
| Supply Current | 14µA (typ) at 3.6V; minimizes quiescent load in battery-backed or low-power systems |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| Reset Output Type | Push-pull RST1 (VCC1-referenced) and RST2 (VCC2-referenced); eliminates need for external pullups |
| MR Input Logic | Active-low with 50kΩ internal pullup to VCC1; simplifies manual reset implementation with momentary switch to GND |
Pinout & Package
MAX6726AKATGD3+T is housed in an 8-pin SOT23 package (package code K8SN+1, outline 21-0078), with thermal resistance θJA = 180°C/W on multilayer board. Pin functions are validated per Maxim's official pin description table for MAX6725A/MAX6726A variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST1 | Active-low push-pull reset output referenced to VCC1; drives μP reset pin directly without pullup |
| 2 | GND | Ground reference for all internal comparators and output drivers |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; debounced by 100ns glitch rejection |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and references RST2 output |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers core logic, references RST1 output, and supplies MR pullup |
| 6 | RST2 | Active-low push-pull reset output referenced to VCC2; independently controls peripheral reset domain |
| 7 | NC | No connect; internally unconnected silicon pad - must remain floating or grounded per layout guidelines |
| 8 | NC | No connect; internally unconnected silicon pad - must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate reset outputs avoids single-point failure |
| Guaranteed reset validity down to 0.8V | Ensures correct reset state even during deep brownout conditions where VCC1 or VCC2 drops to 0.8V |
| Push-pull RST1 and RST2 outputs | Eliminates external pullup resistors, reduces BOM count, and improves noise immunity vs. open-drain alternatives |
| 280ms minimum reset timeout | Meets μP power-on reset timing requirements for complex boot sequences in industrial controllers |
| Low 14µA supply current | Extends battery life in portable equipment and enables always-on supervision in energy-constrained nodes |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5V main logic rail and 3.3V I/O rail in programmable logic controller CPU board during cold cranking and load dump events. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting independent RST1 (for CPU) and RST2 (for I/O expander) with 280ms timeout to ensure deterministic recovery. Use Value: Prevents partial initialization and firmware corruption by guaranteeing both rails stabilize before release, even under 0.8V brownout. |
Use Scenario: Supervises 5V MCU supply and 3.3V CAN transceiver supply in body control unit exposed to automotive temperature extremes. IC Role / Device Role / Timing Role: Provides AEC-Q100-aligned dual-supply reset signaling with push-pull outputs immune to ESD-induced glitches. Use Value: Enables fail-safe operation across -40°C to +125°C with no external components, reducing PCB area and qualification risk. |
| Medical Infusion Pump | Network Edge Router |
Use Scenario: Ensures safe power-up sequencing of 5V motor driver and 3.3V sensor interface in battery-powered infusion pump with strict safety certification. IC Role / Device Role / Timing Role: Generates synchronized reset pulses to MCU and analog front-end using RST1/RST2, with MR input for emergency hardware reset. Use Value: Meets IEC 62304 Class C software safety requirements via deterministic, low-current supervision with no software dependency. |
Use Scenario: Monitors primary 5V system rail and secondary 3.3V PHY rail in compact edge router subjected to thermal cycling and voltage ripple. IC Role / Device Role / Timing Role: Delivers 280ms reset hold time and 14µA quiescent current to maintain uptime while minimizing standby power draw. Use Value: Reduces thermal stress on downstream regulators by eliminating unnecessary reboots during marginal supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6725AKATGD3+T | Identical pinout and electrical specs, but features open-drain RST1/RST2 outputs instead of push-pull | Requires external pullup resistors; suitable where level-shifting or wired-OR reset bus is needed | Select MAX6725AKATGD3+T only if open-drain topology is required for system-level reset arbitration |
| TPS3808G33DBVR | Single-supply (3.3V only) supervisor with 200ms timeout; no VCC2 input or RST2 output | Lacks dual-rail monitoring and independent secondary reset - cannot replace MAX6726AKATGD3+T in multivoltage designs | Use TPS3808G33DBVR only for cost-sensitive 3.3V-only applications where secondary rail supervision is omitted |
Compared with MAX6725AKATGD3+T, the MAX6726AKATGD3+T eliminates external pullups via push-pull outputs, reducing component count and improving noise margin; versus TPS3808G33DBVR, it uniquely supports true dual-rail monitoring with independent reset domains essential for safety-critical multivoltage systems.
Availability
MAX6726AKATGD3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and network edge routers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6726AKATGD3+T 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 communications markets.
The MAX6715A–MAX6729A family was designed specifically for ultra-low-voltage dual/triple-supply microprocessor supervision in space-constrained, thermally demanding applications - delivering guaranteed reset integrity down to 0.8V with minimal quiescent current.
FAQ
What is the reset threshold voltage for VCC1 on the MAX6726AKATGD3+T?
The MAX6726AKATGD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with tolerance of ±0.125V (min/max 4.500V/4.750V). This value is fixed per the 'K' suffix in the ordering code and applies across the full -40°C to +125°C operating range with 20ppm/°C tempco. The MAX6726AKATGD3+T uses this threshold to assert RST1 when the primary 5V rail drops below specification.
Does the MAX6726AKATGD3+T support monitoring a third voltage rail?
No, the MAX6726AKATGD3+T does not support third-rail monitoring. It belongs to the MAX6725A/MAX6726A subgroup, which lacks RSTIN and PFI pins - confirmed by its 8-pin SOT23 pinout showing NC on pins 7 and 8, and absence of RSTIN/PFI functionality in the device selector guide. For triple-voltage supervision, consider MAX6723AKATGD3+T or MAX6727AKATGD3+T variants instead of the MAX6726AKATGD3+T.
What is the function of pins 7 and 8 on the MAX6726AKATGD3+T?
Pins 7 and 8 of the MAX6726AKATGD3+T are no-connect (NC) terminals - internally unconnected silicon pads with no electrical function. Per Maxim's official pin description table for MAX6725A/MAX6726A, these pins must remain floating or be tied to GND in PCB layout to avoid parasitic coupling. They are not reserved for future functionality and do not support WDI, PFI, or RSTIN in the MAX6726AKATGD3+T variant.
Is the MAX6726AKATGD3+T compatible with AEC-Q100 automotive qualification?
The MAX6726AKATGD3+T itself is not individually AEC-Q100 qualified; however, it belongs to the MAX6715A–MAX6729A family where specific variants (e.g., MAX6719AUTTWD1/V+T) carry AEC-Q100 Grade 1 (-40°C to +125°C) certification. The MAX6726AKATGD3+T shares identical process, design, and test flow - making it suitable for automotive applications where full qualification is managed at the system level, provided layout and derating comply with AEC-Q100 stress limits.
What is the minimum reset timeout period for the MAX6726AKATGD3+T?
The MAX6726AKATGD3+T has a minimum reset timeout period of 280ms, indicated by the 'D5' suffix in its part number. This value is guaranteed over temperature and supply voltage, with typical values of 420ms and maximum of 560ms. The timeout begins when VCC1 or VCC2 falls below threshold and holds RST1/RST2 low until completion - critical for ensuring full μP initialization in industrial and automotive systems using the MAX6726AKATGD3+T.
MAX6726AKATGD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.11V, 3.075V, Adj
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6726AKATGD3+T FAQ
1.How can I place an order for MAX6726AKATGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6726AKATGD3+T 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 MAX6726AKATGD3+T reliable?
The price and inventory of MAX6726AKATGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6726AKATGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6726AKATGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6726AKATGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6726AKATGD3+T?
MAX6726AKATGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6726AKATGD3+T 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 MAX6726AKATGD3+T?
For technical support, including MAX6726AKATGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6726AKATGD3+T requirements.
6.How does Aetrix verify that MAX6726AKATGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6726AKATGD3+T 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 MAX6726AKATGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6726AKATGD3+T?
All MAX6726AKATGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6726AKATGD3+T, 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 MAX6726AKATGD3+T part is unused and in its original packaging.
Return procedure for MAX6726AKATGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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