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Analog Devices Inc./Maxim Integrated MAX6723UTYDD3+T
- Part No.:
- MAX6723UTYDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTYDD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,511
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Product details
Overview
MAX6723UTYDD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V (VTH1), 3.075V (VTH2), and 626.5mV reference for RSTIN. It asserts an active-low open-drain reset output with 210ms minimum timeout, supports manual reset input, and operates from -40°C to +85°C. Used in telecom power management to ensure reliable boot and brownout recovery.
For engineers reviewing the MAX6723UTYDD3+T datasheet, MAX6723UTYDD3+T pinout, MAX6723UTYDD3+T application, or MAX6723UTYDD3+T equivalent, key selection factors include its triple-supply monitoring capability, guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, and compatibility with low-voltage core/I/O rail systems requiring precise undervoltage detection and watchdog-free supervision.
Technical Context
The MAX6723UTYDD3+T implements dual independent voltage comparators for VCC1 and VCC2, plus a high-impedance adjustable comparator on RSTIN referenced to a 626.5mV internal bandgap. Reset assertion occurs when any monitored voltage falls below its threshold, and reset remains asserted for a minimum 210ms after all voltages recover.
It features an open-drain RST output (pin 1), GND (pin 2), MR (pin 3), VCC2 (pin 4), VCC1 (pin 6), and RSTIN (pin 5). No watchdog or power-fail functions are included - confirmed by Selector Guide and Pin Description tables showing "-" for WDI and PFI/PFO columns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (typ), factory-trimmed; ensures reliable reset assertion during 5V rail brownout before system logic fails. |
| VCC2 Threshold | 3.075V (typ), factory-trimmed; monitors 3.3V I/O supply with ±1.5% tolerance over temperature. |
| RSTIN Reference | 626.5mV (typ); enables external resistor-divider to monitor third supply as low as 0.62V with <25nA input bias. |
| Reset Timeout | 210ms (min); provides sufficient hold time for FPGA/CPU initialization sequences after power recovery. |
| Supply Current | 14µA (typ) at 3.6V; minimizes quiescent load in battery-backed or energy-sensitive applications. |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded systems without derating. |
| Reset Validity | Guaranteed down to VCC1 or VCC2 = 0.8V; ensures deterministic reset state during deep brownout conditions. |
Pinout & Package
MAX6723UTYDD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts when VCC1/VCC2/RSTIN fall below thresholds. |
| 2 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection. |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; 1µs minimum pulse width required. |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal circuitry when > VCC1 and sets VTH2 reference. |
| 5 | RSTIN | Adjustable undervoltage monitor input; high-impedance node referenced to 626.5mV internal reference. |
| 6 | VCC1 | Primary supply input (1.8V–5.0V); powers device when > VCC2 and sets VTH1 reference. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous VCC1 (4.625V), VCC2 (3.075V), and RSTIN (626.5mV ref) supervision eliminates need for discrete comparators. |
| Factory-trimmed thresholds | VTH1 = 4.625V and VTH2 = 3.075V with ±1.5% accuracy over -40°C to +85°C - no calibration required. |
| Low-power operation | 14µA typical ICC at 3.6V enables use in always-on subsystems without compromising battery life. |
| Immunity to VCC transients | Withstands negative-going VCC glitches ≤20µs at 100mV overdrive - prevents spurious resets in noisy environments. |
| Reset validity at low VCC | Guaranteed correct RST logic state even when VCC1 or VCC2 drops to 0.8V - critical for graceful shutdown. |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring primary 4.8V DC-DC output, secondary 3.3V I/O rail, and auxiliary 1.2V FPGA core supply in remote radio units. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting open-drain reset to ARM Cortex-A9 processor and FPGA configuration logic upon any rail fault. Use Value: Prevents partial initialization and latch-up by enforcing synchronized reset across mixed-voltage domains with 210ms hold time. |
Use Scenario: Ensuring safe startup and brownout recovery in DIN-rail mounted programmable logic controllers with isolated 24V input, 5V logic, and 3.3V communication interfaces. IC Role / Device Role / Timing Role: Supervising VCC1 (5V), VCC2 (3.3V), and RSTIN (via divider on 24V bus) to trigger system-wide reset before firmware corruption occurs. Use Value: Guarantees reset assertion down to 0.8V on either supply - enabling controlled shutdown during gradual AC line sag. |
| Network Switch ASIC Management | Medical Diagnostic Imaging Subsystem |
|
Use Scenario: Managing power integrity for multi-rail ASICs in 10G Ethernet switches where 4.625V (PHY), 3.075V (MAC), and 1.8V (core) rails require coordinated supervision. IC Role / Device Role / Timing Role: Providing single-chip triple-monitoring with factory-set thresholds matching ASIC vendor requirements, eliminating layout space for three discrete supervisors. Use Value: Reduces BOM count and PCB area vs. discrete solution while maintaining ±1.5% threshold accuracy over full temperature range. |
Use Scenario: Supervising safety-critical 4.625V analog front-end supply, 3.075V digital control rail, and 2.5V ADC reference in portable ultrasound imaging modules. IC Role / Device Role / Timing Role: Asserting fail-safe reset to microcontroller and analog signal chain when any monitored rail deviates beyond medical-grade tolerance bands. Use Value: Meets IEC 62304 Class C software safety requirements via deterministic reset behavior and validated 210ms timeout period. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTYDD3+T | Push-pull RST output instead of open-drain; identical thresholds, timeout, and pinout. | Requires no external pullup; better suited for driving CMOS inputs directly but incompatible with wired-OR reset buses. | Select MAX6724UTYDD3+T if driving a single IC reset pin without shared bus; otherwise retain MAX6723UTYDD3+T for flexibility. |
| TPS3808G33DBVR | Dual-supply only (VDD, VDD2); no RSTIN input; fixed 3.3V/1.6V thresholds; 200ms timeout; SOT23-6. | Lacks third-supply monitoring capability; cannot replace RSTIN-based auxiliary rail supervision without redesign. | Use only if system requires only two-rail monitoring and can accept fixed thresholds - not a functional substitute for MAX6723UTYDD3+T's triple-voltage capability. |
Compared with MAX6724UTYDD3+T, the MAX6723UTYDD3+T offers open-drain reset for bus sharing and legacy compatibility; compared with TPS3808G33DBVR, it adds essential RSTIN-based third-rail monitoring with adjustable threshold, making it uniquely suitable for complex multivoltage systems requiring three independent supply checks.
Availability
MAX6723UTYDD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6723UTYDD3+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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage, triple-supply supervisory circuits optimized for space-constrained, multirail systems where reliability, low quiescent current, and factory-trimmed accuracy are critical.
FAQ
What is the reset timeout period of the MAX6723UTYDD3+T?
The MAX6723UTYDD3+T has a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number. This duration is guaranteed over the full -40°C to +85°C operating temperature range and ensures sufficient reset assertion time for CPU/FPGA initialization sequences after power recovery. The actual timeout may vary slightly due to process and temperature but remains ≥210ms under all specified conditions.
Does the MAX6723UTYDD3+T include a watchdog timer function?
No, the MAX6723UTYDD3+T does not include a watchdog timer. Per the Selector Guide and Pin Description tables, WDI functionality is marked "-" for this part number. The MAX6723UTYDD3+T is a triple-supply supervisor with manual reset input and adjustable RSTIN monitoring, but lacks watchdog input or associated timing circuitry - unlike MAX6721–MAX6729 variants with "W" in their ordering code.
What are the exact factory-trimmed voltage thresholds for MAX6723UTYDD3+T?
The MAX6723UTYDD3+T has factory-trimmed thresholds of 4.625V (VTH1, falling) for VCC1 and 3.075V (VTH2, falling) for VCC2, per the Reset Voltage Threshold Suffix Guide. Its RSTIN input uses a 626.5mV internal reference, enabling external resistor-divider networks to monitor a third supply. All thresholds are specified with ±1.5% tolerance over temperature and supply voltage variations.
Is the MAX6723UTYDD3+T compatible with 1.8V logic systems?
Yes, the MAX6723UTYDD3+T supports 1.8V operation: VCC2 can be as low as 0.9V, and the device guarantees valid reset output down to VCC1 or VCC2 = 0.8V. Its MR input accepts TTL/CMOS levels (VIH = 0.7×VCC1), and RSTIN's 626.5mV reference allows monitoring of sub-1V supplies. However, VCC1 must be ≥1.8V to meet the 4.625V threshold requirement - so 1.8V-only systems should use VCC1 = 4.625V rail and VCC2 = 1.8V rail.
What package type and footprint does the MAX6723UTYDD3+T use?
The MAX6723UTYDD3+T uses a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm body size, 0.95mm pitch), with lead-free (+T) termination. Its pinout is standardized across the MAX6715–MAX6729 family: pin 1 = RST (open-drain), pin 2 = GND, pin 3 = MR, pin 4 = VCC2, pin 5 = RSTIN, pin 6 = VCC1. Footprint matches JEDEC MO-178AB.
MAX6723UTYDD3+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:
- 0.788V, 2.188V, 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
MAX6723UTYDD3+T FAQ
1.How can I place an order for MAX6723UTYDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTYDD3+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 MAX6723UTYDD3+T reliable?
The price and inventory of MAX6723UTYDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTYDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723UTYDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTYDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTYDD3+T?
MAX6723UTYDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTYDD3+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 MAX6723UTYDD3+T?
For technical support, including MAX6723UTYDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTYDD3+T requirements.
6.How does Aetrix verify that MAX6723UTYDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723UTYDD3+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 MAX6723UTYDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723UTYDD3+T?
All MAX6723UTYDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTYDD3+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 MAX6723UTYDD3+T part is unused and in its original packaging.
Return procedure for MAX6723UTYDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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