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Analog Devices Inc./Maxim Integrated MAX6726KAZGD3+T
- Part No.:
- MAX6726KAZGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6726KAZGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6726KAZGD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring VCC1 (1.62V threshold), VCC2 (2.313V threshold), and RSTIN (626.5mV reference) with 210ms reset timeout, push-pull RST and RST2 outputs, manual reset input, and watchdog timer - used in multivoltage telecom and industrial power management systems.
For engineers reviewing the MAX6726KAZGD3+T datasheet, MAX6726KAZGD3+T pinout, MAX6726KAZGD3+T application, or MAX6726KAZGD3+T equivalent, key selection criteria include dual-supply monitoring with factory-trimmed thresholds, guaranteed reset validity down to VCC1/VCC2 = 0.8V, low 14µA supply current, and integrated watchdog with 35s startup/1.12s normal timeout.
Technical Context
The MAX6726KAZGD3+T implements independent voltage comparators for primary (VCC1), secondary (VCC2), and auxiliary (RSTIN) supplies, each with ±0.5% hysteresis and 20ppm/°C tempco. Its dual push-pull reset outputs (RST referenced to VCC1, RST2 to VCC2) drive active-low signals without external pullups.
It integrates a dual-mode watchdog timer: 35s minimum initial timeout after any reset event, followed by 1.12s standard timeout after first WDI transition; MR input features internal 50kΩ pullup and 1µs minimum pulse width support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 1.620V (factory-trimmed, falling edge; enables reliable 1.8V core supply monitoring) |
| VCC2 Threshold | 2.313V (factory-trimmed, falling edge; supports 2.5V I/O rail supervision) |
| RSTIN Reference | 626.5mV (internal bandgap reference; allows adjustable third-supply monitoring down to 0.62V) |
| Reset Timeout | 210ms (minimum; ensures sufficient hold time for processor initialization and memory stabilization) |
| Supply Current | 14µA (typical at 3.6V; enables battery-backed operation in portable equipment) |
| Operating Temp | -40°C to +85°C (industrial-grade range; validated across full temperature span) |
| Watchdog Timeout | 1.12s (minimum normal mode; provides rapid fault detection during runtime) |
Pinout & Package
MAX6726KAZGD3+T is housed in an 8-pin SOT23-8 package (2.0mm × 2.1mm × 1.25mm), RoHS-compliant and lead-free (+T suffix), with thermal pad exposed on bottom for enhanced power dissipation in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when any monitored supply drops below threshold or MR is pulled low |
| 2 | GND | System ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; initiates reset on logic-low pulse ≥1µs |
| 4 | RST2 | Active-low push-pull reset output referenced to VCC2; independently controlled but shares same timeout logic as RST |
| 5 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal circuitry when above VCC1 and sets VCC2 comparator reference |
| 6 | VCC1 | Primary supply input (1.8V–5.0V); powers device when above VCC2 and sets VCC1 comparator reference |
| 7 | WDI | Watchdog input; resets internal timer on rising/falling edge; long (35s) startup / short (1.12s) normal timeout modes |
| 8 | RSTIN | Adjustable reset monitor input; compares against 626.5mV internal reference; enables third-supply supervision via resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | RST (VCC1-referenced) and RST2 (VCC2-referenced) eliminate need for external pullups in mixed-rail systems |
| Factory-trimmed dual thresholds | VCC1 = 1.620V ±0.045V and VCC2 = 2.313V ±0.062V ensure precise, production-ready voltage monitoring without calibration |
| Adjustable third-supply monitor | RSTIN with 626.5mV internal reference supports monitoring of supplies as low as 0.62V using high-impedance resistor dividers |
| Dual-mode watchdog timer | 35s startup timeout accommodates complex boot sequences; 1.12s runtime timeout detects software hangs rapidly |
| Guaranteed reset validity | Outputs remain valid down to VCC1 or VCC2 = 0.8V - critical for brownout recovery in industrial power systems |
Applications
| Telecom Power Management | Industrial PLC Controllers |
|---|---|
|
Use Scenario: Monitoring 3.3V backplane, 2.5V FPGA I/O, and 1.2V core rails in carrier-grade line cards. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting synchronized reset to CPU, FPGA, and PMIC during undervoltage events. Use Value: Prevents partial initialization and metastability by holding all domains in reset until all three rails stabilize above their thresholds. |
Use Scenario: Supervising 24V DC input, 5V logic, and 3.3V microcontroller supply in programmable logic controllers. IC Role / Device Role / Timing Role: Dual push-pull RST/RST2 outputs drive separate reset lines for analog front-end and digital controller subsystems. Use Value: Enables independent reset timing per domain while sharing one timeout period - simplifies BOM and layout vs. discrete supervisors. |
| Portable Medical Devices | Network Switch Power Sequencing |
|
Use Scenario: Battery-powered ultrasound handheld with Li-ion (3.0–4.2V), 1.8V sensor interface, and 1.2V DSP core. IC Role / Device Role / Timing Role: RSTIN monitors battery voltage via divider; VCC1/VCC2 supervise regulated rails; MR supports emergency hardware reset. Use Value: 14µA quiescent current extends battery life; 0.8V reset validity ensures clean restart even during deep discharge recovery. |
Use Scenario: 1RU Ethernet switch requiring staggered power-up of PHY, MAC, and management MCU. IC Role / Device Role / Timing Role: WDI monitors MAC activity; RST2 holds PHY in reset until MAC firmware confirms link readiness. Use Value: Dual-mode watchdog prevents false resets during boot while catching runtime lockups - improves system uptime and diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6725KAZGD3+T | Open-drain RST and RST2 outputs (vs. push-pull in MAX6726KAZGD3+T); identical thresholds, timeout, and feature set | Requires external pullup resistors; better suited for bidirectional µP reset pins or wired-OR reset buses | Select MAX6725KAZGD3+T when interfacing to processors with open-drain-compatible reset I/O or shared reset busses. |
| TPS3808G33DBVR | Dual-supply monitor only (VDD1/VDD2); no RSTIN input; fixed 3.3V VDD1 threshold; 200ms timeout; 1.5µA supply current | Lacks third-supply monitoring and watchdog; optimized for ultra-low-power single-rail applications | Choose TPS3808G33DBVR only for cost-sensitive dual-rail designs where RSTIN and WDI are unnecessary. |
Compared with MAX6725KAZGD3+T and TPS3808G33DBVR, MAX6726KAZGD3+T uniquely delivers push-pull dual reset outputs plus RSTIN-adjustable third-supply monitoring and dual-mode watchdog - making it optimal for compact, multirail industrial and telecom systems requiring minimal external components and robust runtime supervision.
Availability
MAX6726KAZGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6726KAZGD3+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 precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6715–MAX6729 family was designed specifically for space-constrained multivoltage systems needing reliable, low-quiescent-current supervision with flexible reset architecture and integrated watchdog functionality.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6726KAZGD3+T?
The MAX6726KAZGD3+T has a factory-trimmed VCC1 reset threshold of 1.620V (minimum), 1.665V (typical), and 1.710V (maximum) on the falling edge. This value is encoded in the "Z" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified across -40°C to +85°C.
Does the MAX6726KAZGD3+T support monitoring a third supply voltage, and how is it configured?
Yes, the MAX6726KAZGD3+T supports third-supply monitoring via the RSTIN pin, which compares the applied voltage against a 626.5mV internal reference. A resistor divider network (e.g., R1/R2) sets the external trip point: VEXT_TH = 626.5mV × (R1 + R2)/R2. The MAX6726KAZGD3+T datasheet specifies ≤25nA input leakage for accurate scaling.
What are the reset output types and drive capabilities of the MAX6726KAZGD3+T?
The MAX6726KAZGD3+T provides two active-low push-pull reset outputs: RST (referenced to VCC1) and RST2 (referenced to VCC2). Each drives low to ≤0.4V at 3.2mA sink load and high to ≥0.8×VCCx at 800µA source load - eliminating external pullups and enabling direct connection to mixed-voltage logic inputs.
How does the watchdog timer operate in the MAX6726KAZGD3+T, and what are its timeout values?
The MAX6726KAZGD3+T features a dual-mode watchdog timer: after any reset event (power-up, MR, or watchdog timeout), it enters a 35s minimum startup mode; upon first valid WDI transition, it switches to 1.12s minimum normal mode. Both timeouts are guaranteed over temperature and supply voltage, with WDI edge-triggered reset clearing.
Is the MAX6726KAZGD3+T compatible with systems requiring reset assertion down to very low supply voltages?
Yes, the MAX6726KAZGD3+T guarantees valid reset output logic states as long as either VCC1 or VCC2 remains ≥0.8V - confirmed across -40°C to +85°C. This ensures reliable brownout detection and recovery in industrial power systems where supplies may dip transiently below nominal levels.
MAX6726KAZGD3+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, 2.313V, Adj
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6726KAZGD3+T FAQ
1.How can I place an order for MAX6726KAZGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6726KAZGD3+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 MAX6726KAZGD3+T reliable?
The price and inventory of MAX6726KAZGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6726KAZGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6726KAZGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6726KAZGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6726KAZGD3+T?
MAX6726KAZGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6726KAZGD3+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 MAX6726KAZGD3+T?
For technical support, including MAX6726KAZGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6726KAZGD3+T requirements.
6.How does Aetrix verify that MAX6726KAZGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6726KAZGD3+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 MAX6726KAZGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6726KAZGD3+T?
All MAX6726KAZGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6726KAZGD3+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 MAX6726KAZGD3+T part is unused and in its original packaging.
Return procedure for MAX6726KAZGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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