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Analog Devices Inc./Maxim Integrated MAX6723UTSYD3+T
- Part No.:
- MAX6723UTSYD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTSYD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,233
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Product details
Overview
MAX6723UTSYD3+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 RSTIN (adjustable down to 0.626V) with 210ms min reset timeout, push-pull active-low RST output, and manual reset input - used in multivoltage telecom power systems to ensure reliable µP boot and brownout recovery.
For engineers reviewing the MAX6723UTSYD3+T datasheet, MAX6723UTSYD3+T pinout, MAX6723UTSYD3+T application, or MAX6723UTSYD3+T equivalent, this page delivers verified electrical specs, exact pin functions, dual-supply reset behavior, watchdog-free operation, and validated alternative options for industrial embedded designs requiring guaranteed reset validity down to 0.8V.
Technical Context
The MAX6723UTSYD3+T implements independent dual-threshold comparators for VCC1 and VCC2, plus a high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap, enabling precise third-voltage monitoring via external resistor divider. Reset assertion occurs on any monitored supply drop below its factory-trimmed threshold, with hysteresis of 0.5% and tempco of 20ppm/°C.
It features a manual reset input (MR) with 50kΩ internal pullup to VCC1, 200ns MR-to-reset delay, and glitch rejection of 100ns; reset output is push-pull active-low referenced to VCC1, guaranteed functional down to VCC1 or VCC2 = 0.8V, with VOL ≤ 0.4V at 3.2mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance) - sets primary supply reset point for 5V-rail monitoring |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance) - enables secondary 3.3V rail supervision with guaranteed reset down to 0.8V |
| RSTIN Threshold | 626.5mV (internal reference) - allows external resistor-divider to monitor auxiliary supplies as low as 0.62V |
| Reset Timeout | 210ms (minimum) - ensures µP remains held in reset long enough for stable power-up sequencing |
| Supply Current | 14µA typical at 3.6V - supports ultra-low-power battery-backed systems without compromising supervision accuracy |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded equipment including telecom line cards and network switches |
| Package | SOT23-6 - surface-mount footprint compatible with automated PCB assembly and space-constrained applications |
Pinout & Package
MAX6723UTSYD3+T uses a 6-pin SOT23-6 package with gull-wing leads, 0.95mm pitch, and 2.9mm × 1.6mm body size. Pin 1 is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low during fault and holds for 210ms min after recovery |
| 2 | GND | System 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 for reset initiation |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if enabled |
| 5 | RSTIN | Adjustable undervoltage monitor input; compares external divided voltage against 626.5mV reference |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, sets RST output reference, and enables VCC1 comparator |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | VCC1 = 4.625V ±125mV and VCC2 = 3.075V ±75mV - eliminates external resistor networks for standard rail supervision |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV internal reference and 25nA max input current - enables precision monitoring of sub-1V rails using high-value resistors |
| Guaranteed reset validity down to 0.8V | Functional reset assertion even when VCC1 or VCC2 drops to 0.8V - ensures fail-safe behavior during deep brownout conditions |
| Push-pull active-low RST output | VOH ≥ 0.8×VCC1 at 800µA source, VOL ≤ 0.4V at 3.2mA sink - drives µP reset pins directly without external pullup |
| Immunity to short VCC transients | Resists glitches <20µs duration at 100mV overdrive - prevents spurious resets during switching noise or load transients |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring 5V primary, 3.3V secondary, and 1.2V FPGA core rails in a carrier-grade line card with strict power-up timing requirements. IC Role / Device Role / Timing Role: Triple-voltage supervisor enforcing correct power sequencing order and holding µP in reset until all rails stabilize above thresholds. Use Value: Prevents configuration corruption during partial power-up by asserting reset until VCC1 ≥ 4.625V, VCC2 ≥ 3.075V, and RSTIN ≥ 626.5mV (via 1.2V divider). |
Use Scenario: Supervising isolated 24V DC input, 5V system rail, and 3.3V microcontroller core in an industrial programmable logic controller with extended temperature operation. IC Role / Device Role / Timing Role: Dual-supply monitor with manual reset override for field service, ensuring deterministic restart after brownout or firmware crash. Use Value: Guarantees valid reset state down to VCC1 = 0.8V, enabling safe shutdown before complete power collapse in harsh environments. |
| Network Switch ASIC Boot | Battery-Powered Edge Gateway |
Use Scenario: Validating 12V PoE input, 5V intermediate rail, and 1.8V switch ASIC core during cold start in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Triple-voltage supervisor with RSTIN configured for 1.8V ASIC core, providing 210ms reset hold time for complex initialization sequences. Use Value: Eliminates need for discrete RC reset circuits while supporting ASIC-specific timing windows and brownout detection margins. |
Use Scenario: Managing Li-ion battery voltage decay across 4.2V full, 3.3V nominal, and 2.8V cutoff thresholds in a cellular-connected IoT gateway. IC Role / Device Role / Timing Role: Adjustable RSTIN input monitors battery voltage via resistor divider, triggering graceful shutdown before critical undervoltage lockout. Use Value: 14µA quiescent current extends battery life; 626.5mV reference enables accurate low-VDD monitoring without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTSYD3+T | Same SOT23-6 package, identical VCC1/VCC2 thresholds and 210ms timeout, but push-pull RST output replaced with open-drain RST | Requires external pullup resistor; suitable where level-shifting or wired-OR reset bus is needed | Select MAX6724UTSYD3+T only if open-drain output compatibility is required - otherwise MAX6723UTSYD3+T provides direct drive capability |
| TPS3808G33DBVR | Single-supply (3.3V only), no RSTIN input, fixed 3.08V threshold, 200ms timeout, 2.5µA IQ - lacks dual/third-voltage monitoring | Applicable only for single-rail 3.3V systems; cannot replace triple-monitoring function | Use TPS3808G33DBVR only in simplified designs where only one supply requires supervision - not a functional substitute for MAX6723UTSYD3+T |
Compared with MAX6724UTSYD3+T, MAX6723UTSYD3+T eliminates external pullup components and simplifies layout; versus TPS3808G33DBVR, it delivers essential triple-rail coverage and adjustable auxiliary monitoring - making it the only option meeting full specification requirements for multivoltage industrial control.
Availability
MAX6723UTSYD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and battery-powered edge gateways requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6723UTSYD3+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, and communications markets, with expertise in power management and system-level reliability.
The MAX6715–MAX6729 family delivers ultra-low-voltage supervisory circuits optimized for multirail embedded systems - specifically engineered to replace discrete reset solutions with integrated dual/triple monitoring, manual reset, and robust transient immunity.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6723UTSYD3+T?
The MAX6723UTSYD3+T has a factory-trimmed VCC1 reset threshold of 4.625V, with a guaranteed tolerance of ±125mV across -40°C to +85°C. This value is encoded in the "SY" suffix per Maxim's Reset Voltage Threshold Suffix Guide and applies specifically to the MAX6723UTSYD3+T, not the broader MAX6723 family.
Does the MAX6723UTSYD3+T include a watchdog timer function?
No, the MAX6723UTSYD3+T does not include a watchdog timer. Per Maxim's Selector Guide, MAX6723 devices are designated for triple-voltage supervision with manual reset and RSTIN input, but exclude WDI functionality - unlike MAX6721/MAX6722/MAX6729 variants which explicitly list "√" under Watchdog Input.
What is the function of the RSTIN pin on the MAX6723UTSYD3+T?
The RSTIN pin on the MAX6723UTSYD3+T is a high-impedance input (max ±25nA leakage) referenced to a 626.5mV internal bandgap voltage; it enables monitoring of a third supply via external resistor divider. When the divided voltage falls below 626.5mV, RST asserts low for the full 210ms timeout period.
Can the MAX6723UTSYD3+T operate with VCC1 below 1.8V?
Yes - the MAX6723UTSYD3+T guarantees correct reset output logic state down to VCC1 = 0.8V, per Absolute Maximum Ratings and Detailed Description sections. However, VCC1 must remain ≥0.8V for reset validity; operation below that level is outside specification and may result in undefined output behavior.
What package type and pin count does the MAX6723UTSYD3+T use?
The MAX6723UTSYD3+T uses a 6-pin SOT23-6 package with gull-wing leads, 0.95mm pitch, and JEDEC MO-178AC outline. This matches the ordering information entry "MAX6723UT_ _D_ -T" specifying "6 SOT23-6", and is confirmed by Pin Configurations in the datasheet.
MAX6723UTSYD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.188V, 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
MAX6723UTSYD3+T FAQ
1.How can I place an order for MAX6723UTSYD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTSYD3+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 MAX6723UTSYD3+T reliable?
The price and inventory of MAX6723UTSYD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTSYD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723UTSYD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTSYD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTSYD3+T?
MAX6723UTSYD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTSYD3+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 MAX6723UTSYD3+T?
For technical support, including MAX6723UTSYD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTSYD3+T requirements.
6.How does Aetrix verify that MAX6723UTSYD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723UTSYD3+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 MAX6723UTSYD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723UTSYD3+T?
All MAX6723UTSYD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTSYD3+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 MAX6723UTSYD3+T part is unused and in its original packaging.
Return procedure for MAX6723UTSYD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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