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Analog Devices Inc./Maxim Integrated MAX6726AKATGD3+
- Part No.:
- MAX6726AKATGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6726AKATGD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:838
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Product details
Overview
MAX6726AKATGD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory IC in an 8-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) supplies with factory-trimmed thresholds of 4.625V and 3.075V respectively, 210ms minimum reset timeout, push-pull active-low RST/RST1 outputs, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power management and industrial embedded systems for reliable brownout detection and system reset control.
For engineers reviewing the MAX6726AKATGD3+ datasheet, MAX6726AKATGD3+ pinout, MAX6726AKATGD3+ application, or MAX6726AKATGD3+ equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), low 14µA typical supply current at 3.6V, watchdog disable capability via open WDI, immunity to sub-20µs VCC transients, and AEC-Q100 qualification suitability for automotive-grade designs.
Technical Context
The MAX6726AKATGD3+ implements independent voltage comparators for VCC1 and VCC2 with internal 20ppm/°C tempco and 0.5% hysteresis, feeding into a digital reset timeout timer with fixed 210ms (min) delay. Its push-pull RST/RST1 outputs are referenced to VCC1 and VCC2 respectively, enabling direct interface to microcontrollers without external pullups.
It integrates manual-reset input (MR) with 50kΩ internal pullup to VCC1 and glitch rejection of 100ns, while remaining fully functional with either supply as low as 0.8V - critical for battery-backed or multi-rail systems where one rail may collapse before the other.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±1.5% over -40°C to +125°C) - ensures precise 4.63V logic supply monitoring without external calibration |
| VCC2 Threshold | 3.075V (factory-trimmed, ±1.5% over -40°C to +125°C) - matches common 3.3V I/O rail with margin for droop |
| Reset Timeout | 210ms (min) - provides sufficient hold time for full microcontroller initialization after power recovery |
| Supply Current | 14µA (typ at 3.6V) - enables >10-year battery life in always-on monitoring applications |
| Operating Temp | -40°C to +125°C - supports under-hood automotive and industrial control environments |
| Reset Output Type | Push-pull active-low RST and RST1 - eliminates need for external pullup resistors on both primary and secondary reset paths |
| VCC Validity Floor | 0.8V on either VCC1 or VCC2 - guarantees correct reset assertion during deep brownout conditions |
Pinout & Package
MAX6726AKATGD3+ uses an 8-pin SOT23 package (3.0mm × 1.6mm × 1.1mm), thermally optimized for high-density PCB layouts and compatible with standard reflow profiles. Pin 1 is marked with a dot; pin numbering follows standard SOT23-8 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST / RST1 | Active-low push-pull reset output referenced to VCC1; asserts when VCC1 < 4.625V, VCC2 < 3.075V, or MR pulled low |
| 2 | GND | Analog/digital ground reference for all internal comparators and logic - must be low-impedance connection |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (powers internal circuitry when > VCC1); sets reference for RST2 output |
| 5 | VCC1 | Primary supply input (powers device when > VCC2); reference for RST/RST1 and internal logic |
| 6 | RST2 | Active-low push-pull reset output referenced to VCC2 - enables independent reset signaling for secondary domain |
| 7 | PFO | Active-low power-fail output (push-pull), asserted when PFI < 626.5mV - used for early warning shutdown |
| 8 | PFI | Power-fail comparator input; high-impedance node for resistor-divider monitoring of auxiliary supply |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitors | Simultaneous tracking of VCC1 (4.625V) and VCC2 (3.075V) with separate reset outputs - eliminates need for two discrete supervisors |
| Guaranteed operation at 0.8V | Valid reset assertion even if either supply drops to 0.8V - ensures fail-safe behavior during severe brownout |
| 210ms min reset timeout | Fixed delay prevents premature release of reset before microcontroller completes boot sequence |
| Push-pull RST/RST1/RST2 outputs | No external pullups required; reduces BOM count and board space vs. open-drain alternatives |
| Power-fail input/output pair (PFI/PFO) | Enables predictive shutdown by monitoring preregulated rails (e.g., battery or AC adapter) before main supplies collapse |
| Immunity to short VCC transients | Rejects glitches ≤20µs duration - avoids spurious resets during switching noise or ESD events |
Applications
| Telecom Power Management | Industrial PLC Control |
|---|---|
|
Use Scenario: Monitoring dual 48V DC-DC derived rails (5V primary, 3.3V secondary) in carrier-grade Ethernet switches during hot-swap insertion. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting coordinated reset to FPGA and ARM processor upon either rail sagging below spec. Use Value: Prevents partial configuration lockup by holding both domains in reset until both supplies stabilize above 4.625V and 3.075V respectively. |
Use Scenario: Ensuring deterministic startup of programmable logic controllers in factory automation cabinets exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Providing temperature-stable reset timing (20ppm/°C) across -40°C to +125°C with no external components. Use Value: Eliminates cold-start failures caused by marginal reset timing drift in legacy RC-based solutions. |
| Automotive Infotainment | Medical Diagnostic Equipment |
|
Use Scenario: Supervising 5V main and 3.3V I/O supplies in head-unit ECUs subject to load-dump transients and battery brownouts. IC Role / Device Role / Timing Role: Asserting reset within 20µs of VCC1 drop below 4.625V while ignoring sub-20µs noise spikes. Use Value: Maintains ASIL-B compliance by preventing undefined MCU states during electrical stress events per ISO 7637-2. |
Use Scenario: Enabling fail-safe shutdown in portable ultrasound devices when lithium battery voltage falls below safe operating threshold. IC Role / Device Role / Timing Role: Using PFI/PFO to trigger orderly data save and display blanking before main VCC collapse. Use Value: Meets IEC 62304 software safety requirements by guaranteeing controlled power-down without data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6725AKATGD3+ | Same 8-pin SOT23 package and 4.625V/3.075V thresholds, but features open-drain RST/RST1 outputs instead of push-pull | Requires external pullup resistors; suitable where level-shifting or wired-OR reset buses are needed | Select MAX6725AKATGD3+ only when open-drain topology is explicitly required for bus sharing |
| TPS3808G33DBVR | Single-supply (3.3V) supervisor with 200ms timeout; lacks VCC2 monitor, PFI/PFO, and RST2 output | Cannot replace dual-rail monitoring function; limited to single-rail systems with no auxiliary supply supervision | Choose TPS3808G33DBVR only for cost-sensitive single-rail applications without secondary supply or power-fail needs |
Compared with MAX6725AKATGD3+, the MAX6726AKATGD3+ saves two external pullup resistors and simplifies layout; versus TPS3808G33DBVR, it delivers full dual-supply coverage plus predictive power-fail signaling - making it the only option meeting complete system-level supervision requirements.
Availability
MAX6726AKATGD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant reliability.
Supply support for MAX6726AKATGD3+ 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications - emphasizing robustness, low power, and high integration.
The MAX6715A–MAX6729A family was engineered specifically for multivoltage embedded systems needing simultaneous, temperature-stable monitoring of primary and secondary rails with minimal footprint and zero external components.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6726AKATGD3+?
The MAX6726AKATGD3+ has factory-trimmed reset thresholds of 4.625V (VCC1) and 3.075V (VCC2), specified with ±1.5% tolerance over the full -40°C to +125°C operating range. These values are encoded in the part number suffix 'TG' per Maxim's Reset Voltage Threshold Suffix Guide and are not adjustable. The MAX6726AKATGD3+ does not include RSTIN or WDI functionality, confirming its role as a fixed dual-threshold supervisor.
Does the MAX6726AKATGD3+ support watchdog timer functionality?
No, the MAX6726AKATGD3+ does not include watchdog timer functionality. Its part number suffix 'D3' indicates a 210ms reset timeout period, but the absence of 'W' in the ordering code (e.g., MAX6721A–MAX6729A include WDI) confirms no watchdog input. The MAX6726AKATGD3+ is a pure dual-voltage supervisor with RST, RST1, RST2, PFI, and PFO - ideal for applications requiring deterministic reset without software interaction.
What is the function of Pin 6 (RST2) on the MAX6726AKATGD3+?
Pin 6 on the MAX6726AKATGD3+ is RST2 - an active-low push-pull reset output referenced to VCC2. It asserts when VCC1 drops below 4.625V, VCC2 drops below 3.075V, or MR is pulled low, and remains asserted for the full 210ms timeout after recovery. Unlike RST/RST1 (referenced to VCC1), RST2's high-state voltage equals 0.8 × VCC2, enabling direct interfacing with 3.3V-domain peripherals without level shifters.
Can the MAX6726AKATGD3+ operate with only one supply powered?
Yes, the MAX6726AKATGD3+ guarantees valid reset output logic state when either VCC1 or VCC2 remains above 0.8V - meaning it functions correctly even if one supply is unpowered or collapsed, provided the other stays ≥0.8V. This allows graceful degradation in multirail systems and supports use cases like battery backup where VCC2 (3.3V) remains active while VCC1 (5V) is offline.
What package type and dimensions does the MAX6726AKATGD3+ use?
The MAX6726AKATGD3+ uses an 8-pin SOT23 package (also labeled SOT23-8 or SOT-23-8), measuring 3.0mm × 1.6mm × 1.1mm with 0.65mm pin pitch. It is RoHS-compliant and lead(Pb)-free (+ suffix), qualified for reflow soldering per JEDEC J-STD-020, and shares footprint compatibility with industry-standard 8-pin SOT23 supervisory ICs for easy layout reuse.
MAX6726AKATGD3+ 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+ FAQ
1.How can I place an order for MAX6726AKATGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6726AKATGD3+ 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+ reliable?
The price and inventory of MAX6726AKATGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6726AKATGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6726AKATGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6726AKATGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6726AKATGD3+?
MAX6726AKATGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6726AKATGD3+ 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+?
For technical support, including MAX6726AKATGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6726AKATGD3+ requirements.
6.How does Aetrix verify that MAX6726AKATGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6726AKATGD3+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6726AKATGD3+?
All MAX6726AKATGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6726AKATGD3+, 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+ part is unused and in its original packaging.
Return procedure for MAX6726AKATGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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