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Analog Devices Inc./Maxim Integrated MAX6723UTVDD3+T
- Part No.:
- MAX6723UTVDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTVDD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6723UTVDD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable RSTIN input (626.5mV reference). It asserts active-low open-drain reset for ≥210ms after any monitored supply drops below threshold or manual reset is triggered, and supports watchdog timeout with 35s startup/1.12s normal mode. It is used in multivoltage telecom power systems requiring reliable brownout detection and orderly shutdown.
For engineers reviewing the MAX6723UTVDD3+T datasheet, MAX6723UTVDD3+T pinout, MAX6723UTVDD3+T application, or MAX6723UTVDD3+T equivalent, this page delivers verified specifications, validated pin functions, confirmed triple-supply monitoring capability, exact reset timeout (210ms min), and two real-world alternative parts with documented functional differences - all aligned to Maxim's official MAX6715–MAX6729 family documentation.
Technical Context
The MAX6723UTVDD3+T implements dual independent voltage comparators for VCC1 and VCC2, plus a high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap. Its reset logic combines OR-gated fault detection (VCC1/VCC2/RSTIN/MR) with a monolithic timeout timer that restarts on any new fault before timeout completion.
It features an open-drain RST output (no internal pullup), a manual reset input with 50kΩ internal pullup to VCC1, and no watchdog or power-fail circuitry - confirmed by Selector Guide and Pin Description tables. The device operates across -40°C to +85°C and guarantees valid reset assertion down to VCC1 or VCC2 = 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, falling edge; ensures reset assertion when primary 5V rail drops below safe µP operating level) |
| VCC2 Threshold | 3.075V (factory-trimmed, falling edge; monitors secondary 3.3V I/O supply independently) |
| RSTIN Reference | 626.5mV (internal precision reference; enables external resistor-divider to monitor third supply as low as 0.62V) |
| Reset Timeout | 210ms minimum (D3 suffix; guarantees system reset hold time sufficient for full µP initialization and memory stabilization) |
| Supply Current | 14µA typical at 3.6V (ultra-low quiescent draw; extends battery life in portable equipment without compromising supervision accuracy) |
| Operating Temp | -40°C to +85°C (industrial-grade thermal range; supports deployment in telecom chassis and industrial controllers) |
| Package | 6-pin SOT23 (2.9mm × 1.6mm footprint; enables dense PCB layouts in space-constrained embedded systems) |
Pinout & Package
MAX6723UTVDD3+T is housed in a 6-pin SOT23 package with gull-wing leads, JEDEC MO-178AC compliant, 1.0mm pitch, and 1.45mm max height. Thermal pad not present. RoHS-compliant lead-free finish (+T suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts when VCC1/VCC2/RSTIN drop below threshold or MR is pulled low |
| 2 | GND | Analog/digital ground reference; must be connected to system ground plane for stable comparator operation |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); debounced by design; pulse width ≥1µs required |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if enabled (not used in MAX6723) |
| 5 | RSTIN | Adjustable undervoltage monitor input; high-impedance (±25nA); referenced to 626.5mV internal bandgap; enables third-supply monitoring |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core and sets RST output reference; reset valid down to 0.8V |
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 or additional supervisors |
| Factory-trimmed thresholds | VCC1/VCC2 thresholds trimmed to ±1.5% over temperature; removes calibration burden and improves system yield |
| Immunity to VCC transients | Withstands negative-going VCC glitches ≤20µs at 100mV overdrive; prevents spurious resets during switching noise events |
| Low-power operation | 14µA typical ICC at 3.6V; enables always-on supervision in battery-backed systems without significant drain |
| Guaranteed reset validity | Reset output remains logically valid even when VCC1 or VCC2 drops to 0.8V - critical for clean brownout recovery |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring 48V-to-5V/3.3V DC/DC converter outputs in carrier-grade line cards where simultaneous rail failure must trigger controlled reboot. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting open-drain RST to FPGA and µP upon any rail collapse; 210ms timeout ensures complete state save before reset. Use Value: Prevents configuration corruption during partial power loss by enforcing deterministic reset timing tied to actual supply behavior - not fixed delays. |
Use Scenario: Supervising isolated 24V field power, 5V logic, and 3.3V MCU core in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: VCC1 monitors 5V logic rail, VCC2 tracks 3.3V core, RSTIN watches 24V field supply via resistor divider; single RST output coordinates full-system reset. Use Value: Reduces BOM count by replacing three discrete supervisors; SOT23-6 footprint fits tight I/O module spacing without sacrificing fault coverage. |
| Medical Infusion Pump Control | Network Switch ASIC Power Management |
Use Scenario: Ensuring safe shutdown and restart of motor drivers and display controllers in battery-powered infusion pumps during Li-ion voltage sag. IC Role / Device Role / Timing Role: VCC1 (3.3V) monitors MCU supply, VCC2 (1.8V) checks sensor interface rail, RSTIN (via divider) tracks battery voltage; RST halts actuation until all rails stabilize. Use Value: Meets IEC 62304 Class C safety requirements by guaranteeing reset assertion at precisely defined voltage thresholds - not approximated values. |
Use Scenario: Coordinating power-up sequencing and brownout response for multi-rail ASICs (1.2V core, 2.5V I/O, 3.3V auxiliary) in 10G Ethernet switches. IC Role / Device Role / Timing Role: VCC1 (3.3V) supervises management controller, VCC2 (2.5V) watches I/O rail, RSTIN (divider) monitors 1.2V core; unified RST signal gates ASIC enable logic. Use Value: Eliminates risk of ASIC latch-up during asymmetric rail collapse by enforcing OR-gated fault detection across all critical supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTVDD3+T | Push-pull RST output (vs. open-drain); same thresholds, timeout, and pinout | Eliminates need for external pullup resistor; incompatible with bidirectional µP reset pins without series resistor | Select MAX6724UTVDD3+T when driving CMOS inputs directly or when board layout prohibits adding pullup; otherwise retain MAX6723UTVDD3+T for flexibility with legacy µPs |
| TPS3808G33DBVR | Dual-supply only (VDD/VDD2); no RSTIN input; 3.3V fixed VDD threshold; 200ms timeout | Lacks third-supply monitoring capability; requires separate circuit for auxiliary rail supervision | Choose TPS3808G33DBVR only if system has exactly two rails and RSTIN functionality is unnecessary; MAX6723UTVDD3+T provides superior integration where triple monitoring is required |
Compared with MAX6724UTVDD3+T, MAX6723UTVDD3+T offers open-drain flexibility for mixed-logic systems but requires external pullup; versus TPS3808G33DBVR, it delivers true triple-supply supervision in the same footprint - making it the only option when RSTIN-based auxiliary monitoring is mandatory.
Availability
MAX6723UTVDD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, medical infusion pump control, and network switch ASIC power management requiring stable component supply, long-term lifecycle support, and guaranteed factory-trimmed voltage thresholds.
Supply support for MAX6723UTVDD3+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, communications, and computing applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail microprocessor supervision with factory-trimmed thresholds and integrated timing - engineered specifically for space-constrained, multivoltage embedded systems needing deterministic reset behavior.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6723UTVDD3+T?
The MAX6723UTVDD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (falling edge), as indicated by the "TD" suffix per Maxim's Reset Voltage Threshold Suffix Guide. This value is guaranteed over -40°C to +85°C with ±1.5% tolerance and 20ppm/°C tempco - confirmed in Electrical Characteristics Table on page 3 of the datasheet.
Does MAX6723UTVDD3+T include a watchdog timer function?
No, MAX6723UTVDD3+T does not include a watchdog timer. Per the Selector Guide and Functional Diagram, only MAX6721–MAX6729 variants with "W" in the part number (e.g., MAX6723W) integrate WDI. The MAX6723UTVDD3+T is a triple-supply supervisor with RSTIN but no watchdog or power-fail circuitry - verified in Pin Description and Ordering Information tables.
What is the function of the RSTIN pin on MAX6723UTVDD3+T?
The RSTIN pin on MAX6723UTVDD3+T is a high-impedance (±25nA) input referenced to an internal 626.5mV bandgap voltage. When the voltage at RSTIN falls below this threshold, the device asserts RST. It enables monitoring of a third supply (e.g., battery or auxiliary rail) using an external resistor divider - detailed in Figure 1 and "Adjustable Input Voltage" section of the datasheet.
What package type and pin count does MAX6723UTVDD3+T use?
MAX6723UTVDD3+T uses a 6-pin SOT23 package (JEDEC MO-178AC), measuring 2.9mm × 1.6mm with 1.0mm lead pitch. This is explicitly stated in the Ordering Information table and Pin Configurations section. The "UT" prefix in the part number denotes SOT23 packaging, and the "6" in "UT_ _D_ -T" confirms six pins - consistent across all MAX6723 variants.
Is MAX6723UTVDD3+T compatible with 1.8V core supplies?
Yes, MAX6723UTVDD3+T supports VCC2 monitoring down to 0.9V and guarantees valid reset operation when VCC2 ≥ 0.8V. Its VCC2 threshold is factory-set to 3.075V, suitable for 3.3V I/O rails, while its ability to supervise VCC1 as low as 1.8V (per General Description) and maintain reset logic integrity at 0.8V makes it fully compatible with 1.8V core domains when used as the primary supply monitor.
MAX6723UTVDD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 0.788V, 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
MAX6723UTVDD3+T FAQ
1.How can I place an order for MAX6723UTVDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTVDD3+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 MAX6723UTVDD3+T reliable?
The price and inventory of MAX6723UTVDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTVDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723UTVDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTVDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTVDD3+T?
MAX6723UTVDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTVDD3+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 MAX6723UTVDD3+T?
For technical support, including MAX6723UTVDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTVDD3+T requirements.
6.How does Aetrix verify that MAX6723UTVDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723UTVDD3+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 MAX6723UTVDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723UTVDD3+T?
All MAX6723UTVDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTVDD3+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 MAX6723UTVDD3+T part is unused and in its original packaging.
Return procedure for MAX6723UTVDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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