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Analog Devices Inc./Maxim Integrated MAX6723AUTVHD3+T
- Part No.:
- MAX6723AUTVHD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723AUTVHD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6723AUTVHD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 140ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V. It supports triple-voltage monitoring via RSTIN (626.5mV internal reference), and is used in telecom power systems requiring reliable brownout detection and orderly shutdown.
For engineers reviewing the MAX6723AUTVHD3+T datasheet, MAX6723AUTVHD3+T pinout, MAX6723AUTVHD3+T application, or MAX6723AUTVHD3+T equivalent, key selection considerations include dual-supply threshold accuracy (±1.5% over temperature), RSTIN-adjustable third-voltage monitoring capability, push-pull active-low RST output referenced to VCC1, and AEC-Q100-qualified variants for automotive-grade reliability validation.
Technical Context
The MAX6723AUTVHD3+T integrates two independent voltage comparators with hysteresis (0.5% of VTH), a programmable reset timeout timer (140ms min), and an adjustable RSTIN input with 626.5mV internal reference. Its architecture guarantees valid reset assertion even when either VCC1 or VCC2 drops to 0.8V - critical for low-power brownout recovery in battery-backed systems.
It features push-pull RST output referenced to VCC1, manual-reset input (MR) with 50kΩ internal pullup, and immunity to sub-20µs VCC transients. The device operates across -40°C to +125°C and draws only 14µA typical supply current at 3.6V, enabling use in always-on industrial monitoring nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), ±1.5% over -40°C to +125°C - ensures precise primary supply monitoring without external calibration |
| VCC2 Reset Threshold | 3.075V (typ), ±1.5% over temperature - enables accurate secondary rail supervision for I/O or core logic domains |
| Reset Timeout Period | 140ms (min), D3 suffix - provides sufficient hold time for full μP initialization after power recovery |
| RSTIN Threshold Voltage | 626.5mV (typ), 3mV hysteresis - allows externally adjustable third-voltage monitoring down to 0.62V via resistor divider |
| Supply Current | 14µA (typ) at 3.6V - minimizes quiescent load in battery-powered or energy-harvesting applications |
| Operating Temperature | -40°C to +125°C - supports deployment in under-hood automotive, industrial PLC, and telecom base station environments |
| Reset Output Type | Push-pull, active-low RST referenced to VCC1 - eliminates need for external pullup and ensures clean logic-level drive |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when VCC1/VCC2/RSTIN fall below threshold or MR is pulled low |
| 2 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual-reset input with 50kΩ internal pullup to VCC1; resets system on logic-low pulse ≥1µs |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and sets RST2 reference if enabled |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers device core, sets RST output reference, and enables VCC1 comparator |
| 6 | RSTIN | Adjustable undervoltage monitor input; compares external divided voltage against 626.5mV internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (4.625V) and VCC2 (3.075V) supervision with separate comparators and hysteresis |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV precision reference enables monitoring of auxiliary rails (e.g., 1.2V, 1.8V, 2.5V) using resistor dividers |
| Guaranteed reset validity at low VCC | Reset logic remains valid down to VCC1 or VCC2 = 0.8V - essential for brownout recovery in deep-sleep states |
| Immunity to short VCC transients | No false reset for negative-going VCC glitches <20µs (at 100mV overdrive), reducing susceptibility to switching noise |
| Low-quiescent-current operation | 14µA typical ICC at 3.6V enables >10-year battery life in always-on supervisory functions |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring primary 4.8V DC-DC output and secondary 3.3V logic rail in carrier-grade Ethernet switch power subsystem. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset during brownout or startup sequencing failure; RSTIN monitors backup battery voltage. Use Value: Prevents firmware corruption by holding μP in reset until both rails stabilize within ±2% tolerance for ≥140ms. |
Use Scenario: Supervising 24V field bus supply (via resistor divider) and 5V controller rail in DIN-rail mounted PLC I/O module. IC Role / Device Role / Timing Role: VCC1 monitors 5V controller rail; RSTIN monitors scaled 24V field supply; MR enables field-service reset. Use Value: Enables deterministic fail-safe behavior: loss of field power triggers immediate watchdog-free reset without software intervention. |
| Automotive Body Control Module | Medical Infusion Pump Controller |
|
Use Scenario: Monitoring 5V MCU supply and 3.3V CAN transceiver rail in BCM with cold-cranking support (down to 6V battery). IC Role / Device Role / Timing Role: Ensures reset remains asserted during cranking-induced dips below 4.6V on VCC1 and below 3.0V on VCC2. Use Value: Guarantees μP stays in reset until both supplies exceed thresholds and remain stable for 140ms - meeting ISO 16750-2 pulse 4 requirements. |
Use Scenario: Supervising main 3.3V processor rail and backup 1.8V real-time clock supply in battery-operated infusion pump. IC Role / Device Role / Timing Role: VCC1 = 3.3V rail; VCC2 = 1.8V RTC rail; RSTIN monitors Li-ion cell voltage via divider for end-of-life warning. Use Value: Provides dual-failure detection: loss of main rail triggers immediate reset; low battery detected via RSTIN initiates graceful shutdown before data loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724AUTVHD3+T | Same SOT23-6 package, identical pinout, but VCC1 threshold = 4.375V (M suffix) and VCC2 = 2.925V (S suffix) | Lower thresholds suit systems with tighter 4.3V/2.9V supply tolerances; not drop-in for 4.625V/3.075V designs | Select when design requires marginally lower trip points without changing layout or firmware |
| TLV809E33DBVR | Single-supply 3.3V supervisor (SOT23-3), no VCC2 or RSTIN inputs, 200ms reset timeout, 3.08V threshold | Lacks dual-rail monitoring and adjustable third-input; suitable only for single-rail applications with relaxed timing | Use only if system has only one critical rail and no requirement for auxiliary voltage monitoring or manual reset |
Compared with MAX6723AUTVHD3+T, MAX6724AUTVHD3+T offers matched form-factor and function with adjusted thresholds for tighter-tolerance rails, while TLV809E33DBVR reduces cost and size at the expense of dual-supply capability and design flexibility.
Availability
MAX6723AUTVHD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body control modules requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned qualification evidence.
Supply support for MAX6723AUTVHD3+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 high-reliability applications, with expertise in power management, sensing, and interface solutions.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail systems where simultaneous monitoring of primary, secondary, and auxiliary supplies is required for functional safety and boot integrity.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6723AUTVHD3+T?
The MAX6723AUTVHD3+T has a VCC1 reset threshold of 4.625V (typical, falling edge) and a VCC2 reset threshold of 3.075V (typical, falling edge), both factory-trimmed with ±1.5% tolerance over -40°C to +125°C. These values correspond to the 'T' and 'S' suffix codes in the Reset Voltage Threshold Suffix Guide and are confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX6723AUTVHD3+T support manual reset functionality?
Yes, the MAX6723AUTVHD3+T includes an active-low manual-reset input (MR) on Pin 3, featuring a 50kΩ internal pullup to VCC1. A logic-low pulse ≥1µs on MR forces the RST output low for the full 140ms reset timeout period, enabling field service, test mode entry, or emergency recovery - no external components required.
Can the MAX6723AUTVHD3+T monitor a third voltage rail, and how is it configured?
Yes, the MAX6723AUTVHD3+T supports triple-voltage monitoring via its RSTIN pin (Pin 6), which compares an external divided voltage against a 626.5mV internal reference. To monitor a third rail (e.g., 1.2V), connect a resistor divider such that VEXT × R2/(R1+R2) = 626.5mV; the device then asserts RST when the divided voltage falls below threshold.
What is the operating temperature range and supply voltage range for the MAX6723AUTVHD3+T?
The MAX6723AUTVHD3+T operates from -40°C to +125°C and accepts VCC1 and VCC2 supply voltages from 0.8V to 5.5V each. It guarantees correct reset output logic state as long as either VCC1 or VCC2 remains ≥0.8V - a key specification enabling robust operation during deep brownout conditions.
Is the MAX6723AUTVHD3+T pin-compatible with other devices in the MAX6715A–MAX6729A family?
Yes, the MAX6723AUTVHD3+T uses the SOT23-6 package (U6+1) and shares identical pinout with all MAX6723A/MAX6724A variants. However, threshold voltages, reset timeout, and feature enablement (e.g., WDI, PFI) vary by suffix - always verify electrical compatibility using the Selector Guide before substitution.
MAX6723AUTVHD3+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:
- 1.313V, 1.575V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6723AUTVHD3+T FAQ
1.How can I place an order for MAX6723AUTVHD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723AUTVHD3+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 MAX6723AUTVHD3+T reliable?
The price and inventory of MAX6723AUTVHD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723AUTVHD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723AUTVHD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723AUTVHD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723AUTVHD3+T?
MAX6723AUTVHD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723AUTVHD3+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 MAX6723AUTVHD3+T?
For technical support, including MAX6723AUTVHD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723AUTVHD3+T requirements.
6.How does Aetrix verify that MAX6723AUTVHD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723AUTVHD3+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 MAX6723AUTVHD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723AUTVHD3+T?
All MAX6723AUTVHD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723AUTVHD3+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 MAX6723AUTVHD3+T part is unused and in its original packaging.
Return procedure for MAX6723AUTVHD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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