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Analog Devices Inc./Maxim Integrated MAX6723UTSHD3+T
- Part No.:
- MAX6723UTSHD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTSHD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6723UTSHD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory IC monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds, 210ms min reset timeout, open-drain active-low RST output, and manual reset input - used in multivoltage embedded systems to ensure reliable power-on reset and brownout protection.
For engineers reviewing the MAX6723UTSHD3+T datasheet, MAX6723UTSHD3+T pinout, MAX6723UTSHD3+T application, or MAX6723UTSHD3+T equivalent, key selection criteria include dual/third-supply monitoring capability, guaranteed reset validity down to 0.8V on either VCC rail, low 14µA typical supply current, SOT23-6 package compatibility, and absence of watchdog or power-fail features in this variant.
Technical Context
The MAX6723UTSHD3+T implements independent voltage comparators for VCC1 (1.53V–4.75V threshold options), VCC2 (0.765V–3.15V), and RSTIN (626.5mV internal reference), each feeding a shared reset logic block that asserts RST low when any monitored voltage falls below its threshold. Reset remains asserted for a minimum 210ms after all voltages recover above their respective thresholds.
This device uses an open-drain RST output referenced to VCC1, requires an external pullup resistor, and includes an internal 50kΩ pullup on MR. It lacks watchdog timer, power-fail input/output, and push-pull reset - distinguishing it from MAX6724/MAX6728/MAX6729 variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (typ), factory-trimmed - sets primary supply brownout detection level for 5V or 4.75V system rails |
| VCC2 Threshold | 3.075V (typ), factory-trimmed - monitors secondary supply such as 3.3V I/O or auxiliary rail |
| RSTIN Threshold | 626.5mV (typ) internal reference - enables external resistor-divider to monitor third supply down to 0.62V |
| Reset Timeout | 210ms (min) - ensures µP reset pulse meets boot initialization timing requirements |
| Supply Current | 14µA (typ) at 3.6V - supports ultra-low-power battery-operated and always-on applications |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments |
| Reset Validity | Down to VCC1 or VCC2 = 0.8V - guarantees correct reset state during deep brownout conditions |
Pinout & Package
MAX6723UTSHD3+T is housed in a 6-pin SOT23-6 package with gull-wing leads, 0.95mm pitch, and JEDEC MO-178AC footprint - compatible with standard reflow assembly and space-constrained PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts when any monitored supply fails |
| 2 | GND | Ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; initiates reset on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input; powers internal circuitry when > VCC1 and sets VCC2 threshold monitoring range |
| 5 | VCC1 | Primary supply input; powers device when > VCC2 and defines main reset threshold and RST reference |
| 6 | RSTIN | Adjustable third-supply monitor input; high-impedance node tied to 626.5mV internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous VCC1, VCC2, and RSTIN supervision eliminates need for discrete comparators or multiple supervisors |
| Factory-trimmed thresholds | VCC1 = 4.625V and VCC2 = 3.075V (±1.5% tolerance) reduce BOM count and eliminate external resistor calibration |
| 210ms reset timeout | Guaranteed minimum delay ensures µP completes power-up sequencing before release from reset |
| 0.8V reset validity | Operational integrity maintained even during severe brownout - critical for fail-safe embedded control |
| 14µA supply current | Enables use in energy-harvesting and long-life battery systems without compromising supervision reliability |
Applications
| Industrial PLC Controller | Telecom Line Card |
|---|---|
Use Scenario: Monitors 5V main logic rail, 3.3V I/O rail, and 1.2V FPGA core supply in DIN-rail mounted automation controller. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting system-wide reset if any rail drops below specification during field operation or ESD event. Use Value: Prevents corrupted firmware execution and latch-up by enforcing clean reset before µP begins instruction fetch. |
Use Scenario: Embedded in carrier-grade Ethernet switch line card with 12V DC/DC input, 3.3V management rail, and 1.8V SerDes supply. IC Role / Device Role / Timing Role: Detects undervoltage on both 3.3V and 1.8V rails while using RSTIN to monitor DC/DC converter feedback node for early fault indication. Use Value: Enables graceful link shutdown and alarm reporting before power collapse disrupts packet forwarding. |
| Medical Patient Monitor | POS Terminal |
Use Scenario: Powers clinical-grade display subsystem requiring stable 5V, 3.3V, and 2.5V supplies derived from isolated DC/DC converters. IC Role / Device Role / Timing Role: Supervises all three rails with 210ms timeout to coordinate boot sequence between ARM processor, touchscreen controller, and ECG analog front-end. Use Value: Ensures deterministic startup and prevents partial initialization that could cause safety-critical UI freeze or sensor misread. |
Use Scenario: Secures retail point-of-sale terminal with battery backup, where 5V main rail, 3.3V MCU rail, and 1.8V smartcard interface must remain synchronized during AC loss. IC Role / Device Role / Timing Role: Uses RSTIN to monitor battery voltage divider, triggering reset before brownout corrupts transaction logging or EMV chip authentication. Use Value: Guarantees atomic commit of financial data and prevents inconsistent state after power interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTSHD3+T | Push-pull RST output instead of open-drain; identical thresholds, timeout, and pinout | Eliminates need for external pullup resistor but incompatible with bidirectional µP reset pins | Select MAX6724UTSHD3+T only when driving dedicated reset lines with no shared bus contention risk |
| TPS3808G33DBVR | Dual-supply monitor (VDD only); no RSTIN input; 3.3V fixed threshold; 200ms timeout; SOT23-6 | Lacks third-supply monitoring capability; requires separate circuit for auxiliary rail supervision | Choose TPS3808G33DBVR only for simpler two-rail systems where RSTIN functionality is unnecessary |
Compared with MAX6723UTSHD3+T, MAX6724UTSHD3+T simplifies layout by removing the pullup resistor but sacrifices bidirectional reset compatibility, while TPS3808G33DBVR reduces cost and complexity in dual-rail designs but cannot replace the triple-monitoring function without additional components.
Availability
MAX6723UTSHD3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, telecom line cards, medical patient monitors, and POS terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6723UTSHD3+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) designs precision analog and mixed-signal ICs for industrial, automotive, communications, and computing markets, with emphasis on high-reliability, low-power, and small-footprint solutions.
The MAX6715–MAX6729 product line delivers compact, ultra-low-voltage supervisory circuits for multirail embedded systems - specifically engineered to replace discrete reset solutions while guaranteeing robust operation down to 0.8V supply.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6723UTSHD3+T?
The MAX6723UTSHD3+T has factory-trimmed thresholds of 4.625V (typ) for VCC1 and 3.075V (typ) for VCC2, with ±1.5% tolerance over temperature. These values correspond to the 'SH' suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide and are verified in the Electrical Characteristics table of the official datasheet.
Does MAX6723UTSHD3+T include a watchdog timer or power-fail functionality?
No, MAX6723UTSHD3+T does not include watchdog timer or power-fail input/output features. Per the Selector Guide and Functional Diagram, it is configured exclusively for triple-voltage supervision (VCC1/VCC2/RSTIN) with manual reset - unlike MAX6728/MAX6729 which add PFI/PFO, or MAX6721/MAX6722 which add WDI.
What is the function of the RSTIN pin on MAX6723UTSHD3+T?
The RSTIN pin on MAX6723UTSHD3+T serves as a high-impedance input for monitoring a third supply voltage via an external resistor-divider, referenced to an internal 626.5mV comparator threshold. When the divided voltage falls below this reference, RST asserts low - enabling flexible supervision of auxiliary rails down to 0.62V.
Is MAX6723UTSHD3+T pin-compatible with other devices in the MAX6715–MAX6729 family?
Yes, MAX6723UTSHD3+T uses the standard 6-pin SOT23-6 package and shares identical pinout with MAX6715–MAX6722 and MAX6724 variants. Pin 1 is RST, Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, Pin 5 is VCC1, and Pin 6 is RSTIN - confirmed in the Pin Description table of the datasheet.
What is the minimum supply voltage required for MAX6723UTSHD3+T to guarantee valid reset output behavior?
MAX6723UTSHD3+T guarantees correct reset output logic state as long as either VCC1 or VCC2 remains above 0.8V - explicitly stated in the General Description and Absolute Maximum Ratings sections. Below 0.8V, reset behavior is not specified and may become indeterminate.
MAX6723UTSHD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.313V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6723UTSHD3+T FAQ
1.How can I place an order for MAX6723UTSHD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTSHD3+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 MAX6723UTSHD3+T reliable?
The price and inventory of MAX6723UTSHD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTSHD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723UTSHD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTSHD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTSHD3+T?
MAX6723UTSHD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTSHD3+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 MAX6723UTSHD3+T?
For technical support, including MAX6723UTSHD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTSHD3+T requirements.
6.How does Aetrix verify that MAX6723UTSHD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723UTSHD3+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 MAX6723UTSHD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723UTSHD3+T?
All MAX6723UTSHD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTSHD3+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 MAX6723UTSHD3+T part is unused and in its original packaging.
Return procedure for MAX6723UTSHD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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