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Analog Devices Inc./Maxim Integrated MAX6723UTVHD3+T
- Part No.:
- MAX6723UTVHD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTVHD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,442
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Product details
Overview
MAX6723UTVHD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable third supply via RSTIN (626mV reference). It asserts active-low open-drain reset for ≥210ms after any monitored voltage drops below threshold or manual reset is triggered. Used in telecom power management to ensure reliable boot and brownout recovery in multivoltage systems.
For engineers reviewing the MAX6723UTVHD3+T datasheet, MAX6723UTVHD3+T pinout, MAX6723UTVHD3+T application, or MAX6723UTVHD3+T equivalent, key selection factors include its triple-supply monitoring capability, 210ms reset timeout, guaranteed reset validity down to VCC1/VCC2 = 0.8V, low 14µA supply current, and compatibility with noisy industrial power rails.
Technical Context
The MAX6723UTVHD3+T implements dual independent voltage comparators for VCC1 and VCC2, plus a high-impedance RSTIN input referenced to a precision 626mV internal bandgap. Its reset logic combines OR-ed fault detection across all three inputs with a monolithic timeout counter ensuring minimum 210ms assertion after recovery.
It features no watchdog or power-fail functionality-confirmed by Selector Guide and Pin Description-and uses open-drain RST output referenced to VCC1, requiring external pullup. The device operates across -40°C to +85°C and maintains valid reset state even when either supply dips to 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance); monitors primary 5V or 4.8V rails with precise brownout detection |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance); monitors secondary 3.3V I/O or core supplies |
| RSTIN Reference | 626mV (±15.5mV); enables external resistor-divider to monitor third supply as low as 0.62V |
| Reset Timeout | 210ms (min); ensures sufficient hold time for processor initialization and peripheral stabilization |
| Supply Current | 14µA (typ at 3.6V); supports ultra-low-power battery-backed or energy-harvesting systems |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded equipment without derating |
| Reset Output | Open-drain active-low RST; requires external pullup, compatible with bidirectional µP reset pins |
Pinout & Package
MAX6723UTVHD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). Pin 1 is marked with dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserted when VCC1 < 4.625V, VCC2 < 3.075V, or RSTIN < 626mV; requires external pullup to VCC1 |
| 2 | GND | Analog/digital ground reference; must be connected to system common ground plane |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; pulse >1µs forces reset |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers core logic, defines RST output reference, and enables reset validity down to 0.8V |
| 6 | RSTIN | Adjustable reset input; high-impedance node (±25nA) tied to 626mV reference; used with resistor divider to monitor third voltage |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1 (4.625V), VCC2 (3.075V), and third supply via RSTIN - eliminates need for discrete comparators or multiple supervisors |
| Guaranteed reset validity | Outputs remain logically valid even when VCC1 or VCC2 drops to 0.8V - critical for graceful shutdown during deep brownouts |
| Low quiescent current | 14µA typical supply current at 3.6V - extends battery life in portable equipment and reduces thermal load in dense PCB layouts |
| Immunity to VCC transients | Withstands negative-going glitches ≤20µs (at 100mV overdrive) - prevents spurious resets in electrically noisy environments |
| Factory-trimmed thresholds | VCC1 = 4.625V ±125mV and VCC2 = 3.075V ±75mV - eliminates external trimming components and improves production yield |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring 48V-to-5V DC/DC converter output (VCC1), isolated 3.3V I/O rail (VCC2), and auxiliary 2.5V FPGA configuration supply (via RSTIN). IC Role / Device Role / Timing Role: Triple-supply supervisor enforcing synchronized reset assertion across power domains during cold start and line sag. Use Value: Prevents partial initialization of communication interfaces by holding reset until all three rails stabilize above their precise thresholds. |
Use Scenario: Supervising main 24V-to-5V supply (VCC1), isolated 3.3V sensor interface rail (VCC2), and backup supercapacitor voltage (via RSTIN) in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Fault-detection hub that triggers controlled shutdown before supercap voltage collapses below safe operating level. Use Value: Enables deterministic last-gasp data logging by asserting reset only after supercap falls below 1.25V (set via R1/R2 on RSTIN). |
| Network Switch ASIC Boot | Medical Diagnostic Imaging Subsystem |
|
Use Scenario: Validating 1.2V ASIC core (VCC2), 3.3V SerDes interface (VCC1), and 1.8V DDR memory termination (via RSTIN) prior to FPGA configuration. IC Role / Device Role / Timing Role: Pre-boot integrity gate ensuring all voltage domains meet timing and tolerance specs before releasing POR signal. Use Value: Eliminates ASIC latch-up risk by enforcing 210ms minimum reset hold time after all three supplies exceed thresholds. |
Use Scenario: Monitoring 5V analog front-end supply (VCC1), 3.3V digital control rail (VCC2), and 2.8V ADC reference buffer (via RSTIN) in ultrasound beamformer modules. IC Role / Device Role / Timing Role: Safety-critical reset arbiter that halts imaging sequence if any supply deviates beyond medical-grade tolerance bands. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing reset assertion within 20µs of threshold violation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTVHD3+T | Push-pull RST output (vs. open-drain); same thresholds, timeout, and pinout | Requires no external pullup; incompatible with bidirectional µP reset pins without series resistor | Select MAX6724UTVHD3+T when driving CMOS inputs directly or when board space prohibits pullup placement |
| TPS3808G33DBVR | Dual-supply only (VDD, VSENSE); no RSTIN; 3.3V fixed VDD threshold; 200ms timeout | Lacks third-supply monitoring; requires separate circuit for auxiliary rail supervision | Choose TPS3808G33DBVR only for cost-sensitive dual-rail designs where RSTIN functionality is unused |
Compared with MAX6724UTVHD3+T and TPS3808G33DBVR, MAX6723UTVHD3+T uniquely delivers triple-supply monitoring with open-drain flexibility and guaranteed sub-1V reset validity-making it optimal for complex multirail systems requiring noise immunity and µP interface compatibility.
Availability
MAX6723UTVHD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX6723UTVHD3+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 power management, sensing, and connectivity in demanding industrial and communications applications.
The MAX6715–MAX6729 family delivers compact, ultra-low-power supervisory circuits optimized for multivoltage embedded systems where reliability, small footprint, and accurate threshold detection are critical.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6723UTVHD3+T?
The MAX6723UTVHD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (minimum 4.500V, maximum 4.750V) with ±125mV tolerance. This value is encoded in the "VH" suffix per Maxim's Reset Voltage Threshold Suffix Guide and verified in the Electrical Characteristics table under VTH1 parameter.
Does MAX6723UTVHD3+T include a watchdog timer function?
No, MAX6723UTVHD3+T does not include a watchdog timer. Per the Selector Guide and Functional Diagram, only MAX6721–MAX6729 variants with "W" in the part number suffix (e.g., MAX6723W) integrate watchdog input; MAX6723UTVHD3+T is explicitly listed without WDI capability.
What is the function of the RSTIN pin on MAX6723UTVHD3+T?
The RSTIN pin on MAX6723UTVHD3+T is a high-impedance input referenced to a 626mV internal bandgap voltage. When used with an external resistor divider, it monitors a third supply voltage down to 0.62V. Assertion occurs when the divided voltage falls below 626mV, triggering the same reset output as VCC1/VCC2 faults.
What package type and dimensions does MAX6723UTVHD3+T use?
MAX6723UTVHD3+T uses a 6-pin SOT23-6 package measuring 2.9mm × 1.6mm × 1.1mm with standard JEDEC MO-178AC outline. The "+T" suffix confirms lead-free, RoHS-compliant construction with matte tin lead finish.
Is MAX6723UTVHD3+T compatible with bidirectional microprocessor reset pins?
Yes, MAX6723UTVHD3+T is compatible with bidirectional µP reset pins due to its open-drain RST output. When interfacing, connect RST directly to the µP's reset I/O port - the open-drain structure avoids contention and allows the µP to drive the line high during normal operation while the supervisor pulls low during faults.
MAX6723UTVHD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.313V, 1.575V, 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
MAX6723UTVHD3+T FAQ
1.How can I place an order for MAX6723UTVHD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTVHD3+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 MAX6723UTVHD3+T reliable?
The price and inventory of MAX6723UTVHD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTVHD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723UTVHD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTVHD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTVHD3+T?
MAX6723UTVHD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTVHD3+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 MAX6723UTVHD3+T?
For technical support, including MAX6723UTVHD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTVHD3+T requirements.
6.How does Aetrix verify that MAX6723UTVHD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723UTVHD3+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 MAX6723UTVHD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723UTVHD3+T?
All MAX6723UTVHD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTVHD3+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 MAX6723UTVHD3+T part is unused and in its original packaging.
Return procedure for MAX6723UTVHD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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