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Analog Devices Inc./Maxim Integrated MAX6726KARVD3
- Part No.:
- MAX6726KARVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6726KARVD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:644
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Product details
Overview
The MAX6726KARVD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 4.625V and 3.075V respectively, 210ms minimum reset timeout, push-pull active-low RST output, and manual-reset input - used to ensure reliable power-on reset and brownout protection in telecom power systems.
For engineers reviewing the MAX6726KARVD3 datasheet, MAX6726KARVD3 pinout, MAX6726KARVD3 application, or MAX6726KARVD3 equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over -40°C to +125°C), guaranteed reset validity down to VCC1/VCC2 = 0.8V, low 14µA typical supply current at 3.6V, and compatibility with bidirectional µP reset I/O via 4.7kΩ series resistor.
Technical Context
This device implements dual independent voltage comparators with hysteresis (0.5% of threshold), internal 20ppm/°C tempco trimming, and a digital reset timeout timer with fixed 210ms (min) delay after all monitored supplies recover. It guarantees correct reset logic state even when either VCC1 or VCC2 drops as low as 0.8V - critical for fail-safe operation during deep brownouts.
The MAX6726KARVD3 features a push-pull RST output referenced to VCC1, an internal 50kΩ pullup on MR, and immunity to sub-100ns VCC transients due to built-in glitch rejection. It does not include watchdog, RSTIN, PFI/PFO, or RST2 functions - confirmed by its suffix "D3" (210ms timeout) and "KAR" (VTH1=4.625V, VTH2=3.075V, push-pull RST, MR enabled, no WDI/RSTIN/PFI).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, ±1.5% over full temperature range) |
| VCC2 Reset Threshold | 3.075V (factory-trimmed, ±1.5% over full temperature range) |
| Reset Timeout Period | 210ms minimum - ensures µP completes boot sequence before release |
| Supply Current | 14µA typical at 3.6V - enables battery-backed or ultra-low-power 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, drives directly into µP reset pin |
| MR Input Logic | Active-low with 50kΩ internal pullup to VCC1 - supports momentary switch or CMOS logic interface |
Pinout & Package
MAX6726KARVD3 is housed in a RoHS-compliant 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), with gull-wing leads and thermal pad omitted. Pin 1 is marked by dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Push-pull active-low reset output referenced to VCC1; sinks ≥1.2mA at VCC1 ≥ 2.7V |
| 2 | GND | Analog/digital ground reference for all comparators and logic |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; 1µs minimum pulse width |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and sets RST2 reference if present (not implemented in MAX6726) |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers device core, references RST output and MR pullup |
| 6 | NC | No connect - internally unconnected; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators and hysteresis |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset assertion even during severe brownout - no undefined output states |
| Low-glitch-immune reset timing | Rejects VCC transients <100ns wide, preventing spurious resets in noisy power environments |
| Push-pull RST output | Eliminates external pullup resistor, reduces BOM count, and improves rise/fall time vs. open-drain |
| Factory-trimmed precision thresholds | ±1.5% tolerance over -40°C to +125°C - avoids calibration overhead in production test |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring primary 48V DC-DC converter output and isolated 3.3V logic rail in remote radio units. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset until both rails stabilize post-power-up or after line surge recovery. Use Value: Prevents firmware execution on marginal VCC2, avoiding corrupted register writes during partial power restoration. |
Use Scenario: Ensuring clean reset of ARM Cortex-M7 controller and isolated CAN transceiver in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Coordinating reset release across two independent power domains (24V field bus and 3.3V logic) with 210ms hold time. Use Value: Guarantees peripheral initialization completes before CPU begins instruction fetch - eliminates race conditions in safety-critical firmware. |
| Automotive ADAS Camera ECU | Medical Infusion Pump Controller |
|
Use Scenario: Supervising 5V camera sensor supply and 1.8V image processor core rail in parking assist systems. IC Role / Device Role / Timing Role: Detecting undervoltage on either rail and holding reset until both exceed 4.625V and 3.075V with 210ms debounce. Use Value: Meets ISO 16750-2 pulse 4a/b requirements for brownout immunity without external RC timing components. |
Use Scenario: Validating main 12V battery-derived supply and 3.3V MCU rail in battery-operated infusion pumps with motor drivers. IC Role / Device Role / Timing Role: Providing fail-safe reset during battery swap or low-Vbat transitions where VCC1 may dip below 4.625V while VCC2 remains stable. Use Value: Enables Class II medical device compliance by eliminating reset ambiguity during dual-rail power transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EC26DBVR | Single-supply (2.63V only), SOT23-3, no MR input, 200ms timeout, 1.6µA IQ | Lacks VCC2 monitoring and manual reset - suitable only for single-rail systems | Select when cost and quiescent current are prioritized over dual-rail coverage |
| ADM6710LAKSZ-RL | Dual-supply (4.63V/3.08V), SOT23-6, open-drain RST, 200ms timeout, -40°C to +125°C | Requires external pullup; lacks MR input; tighter VTH tolerance (±0.75%) but higher IQ (22µA) | Choose when open-drain flexibility and tighter threshold accuracy outweigh push-pull convenience |
Compared with TLV809EC26DBVR and ADM6710LAKSZ-RL, the MAX6726KARVD3 uniquely delivers factory-trimmed dual thresholds with push-pull RST and integrated MR in one 6-pin SOT23 - reducing layout area and eliminating pullup resistor placement risk in space-constrained designs.
Availability
MAX6726KARVD3 is available at Aetrix Electronics and suitable for telecom power management, industrial PLC I/O modules, and automotive ADAS camera ECUs requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6726KARVD3 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, multi-rail microprocessor supervision in harsh environments - emphasizing precision threshold stability, wide temperature operation, and minimal external components.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6726KARVD3?
The MAX6726KARVD3 has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with ±1.5% tolerance over the full -40°C to +125°C operating range. These values are encoded in the "KAR" suffix per Maxim's Reset Voltage Threshold Suffix Guide and verified in the Electrical Characteristics table of the official datasheet.
Does the MAX6726KARVD3 include a watchdog timer function?
No, the MAX6726KARVD3 does not include a watchdog timer. Its "KAR" suffix indicates configuration with dual-voltage supervision, push-pull RST, and manual reset - but explicitly excludes WDI functionality. Watchdog capability is only present in MAX6721A–MAX6729A variants with "W" or "WD" in the suffix.
Can the MAX6726KARVD3 monitor a third supply voltage using RSTIN?
No, the MAX6726KARVD3 does not support RSTIN-based auxiliary voltage monitoring. The "KAR" ordering code confirms absence of RSTIN functionality - only MAX6719A/MAX6720A/MAX6723A–MAX6727A variants include the RSTIN pin and 626mV internal reference for adjustable third-supply supervision.
What is the function of Pin 6 (NC) on the MAX6726KARVD3?
Pin 6 on the MAX6726KARVD3 is a no-connect terminal - internally unconnected and unused. Maxim's Pin Description table confirms it has no electrical function. It should be left floating or tied to GND in PCB layout to minimize noise coupling, but must never be connected to VCC or signal lines.
Is the MAX6726KARVD3 compatible with bidirectional µP reset pins?
Yes, the MAX6726KARVD3's push-pull RST output can interface with bidirectional µP reset pins when a 4.7kΩ series resistor is placed between RST and the µP pin - as documented in Figure 4 of the datasheet. This prevents logic contention while maintaining fast edge rates and robust noise immunity.
MAX6726KARVD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.575V, 2.625V, Adj
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6726KARVD3 FAQ
1.How can I place an order for MAX6726KARVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6726KARVD3 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 MAX6726KARVD3 reliable?
The price and inventory of MAX6726KARVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6726KARVD3 is usually 5 days.
3.What payment methods are accepted for MAX6726KARVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6726KARVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6726KARVD3?
MAX6726KARVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6726KARVD3 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 MAX6726KARVD3?
For technical support, including MAX6726KARVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6726KARVD3 requirements.
6.How does Aetrix verify that MAX6726KARVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6726KARVD3 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 MAX6726KARVD3 meets industry standards.
7.What is the process for return or replacement of MAX6726KARVD3?
All MAX6726KARVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6726KARVD3, 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 MAX6726KARVD3 part is unused and in its original packaging.
Return procedure for MAX6726KARVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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