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Analog Devices Inc./Maxim Integrated MAX6723AUTWGD3+T
- Part No.:
- MAX6723AUTWGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723AUTWGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6723AUTWGD3+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 1.388V (VTH2), 210ms minimum reset timeout, and RSTIN input for adjustable third-voltage monitoring down to 0.626V - used in telecom power management and industrial multivoltage systems.
For engineers reviewing the MAX6723AUTWGD3+T datasheet, MAX6723AUTWGD3+T pinout, MAX6723AUTWGD3+T application, or MAX6723AUTWGD3+T equivalent, this page delivers verified electrical specs, SOT23-6 terminal mapping, watchdog timing behavior, power-fail comparator interface details, and validated alternative parts for dual-rail voltage supervision in harsh-temperature embedded designs.
Technical Context
The MAX6723AUTWGD3+T implements dual independent voltage comparators with hysteresis (0.5% of threshold), guaranteed reset assertion when either VCC1 or VCC2 drops below its threshold, and internal reset timeout timer with 210ms minimum duration (D3 suffix). It supports active-low open-drain RST output referenced to VCC1 and includes RSTIN input with 626.5mV internal reference for external resistor-divider-based third-voltage monitoring.
Its watchdog function features dual-mode timing: 35s minimum startup period after reset, then 1.12s minimum normal timeout - triggered by WDI edge transitions. The device operates across –40°C to +125°C, draws only 10µA typical supply current at 3.6V, and maintains valid reset logic down to VCC1 or VCC2 = 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), factory-trimmed - ensures reliable reset assertion on primary 4.5–5.0V rail brownout |
| VCC2 Reset Threshold | 1.388V (typ), factory-trimmed - monitors secondary 1.2–1.5V core supply with ±25mV tolerance |
| Reset Timeout Period | 210ms (min), D3 suffix - provides sufficient hold time for complex processor initialization sequences |
| RSTIN Threshold Voltage | 626.5mV (typ), internal reference - enables precise third-voltage monitoring via external resistor divider |
| Supply Current | 10µA (typ) at VCC1 = 3.6V - minimizes quiescent load on battery-backed or low-power auxiliary rails |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and telecom base station environments |
| Reset Output Type | Active-low open-drain RST - requires external pullup; compatible with bidirectional μP reset I/O pins |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 1.1mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Open-drain output asserted low during VCC1/VCC2 undervoltage, MR activation, or RSTIN fault; requires external pullup to VCC1 |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output drivers; must be low-impedance connection |
| 3 - MR | Manual-reset input | Active-low input with 50kΩ internal pullup to VCC1; asserts reset when pulled ≤0.3×VCC1; debounced internally |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and RST2 logic; monitors 0.9–3.3V rail; threshold set to 1.388V (D suffix) |
| 5 - VCC1 | Primary supply input | Main power source and reference for RST output driver; powers core logic; threshold set to 4.625V (W suffix) |
| 6 - RSTIN | Adjustable monitor input | High-impedance input (±100nA) referenced to 626.5mV internal bandgap; enables third-voltage supervision via resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC1 (4.625V) and VCC2 (1.388V) with separate comparators and hysteresis - eliminates need for two discrete supervisors |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV precision reference enables monitoring of any rail ≥0.626V using two external resistors - supports custom thresholds without trimming |
| 210ms minimum reset timeout | D3-suffix timer ensures reset remains asserted long enough for full μP boot sequence, including PLL lock and memory initialization |
| Watchdog with dual-mode timing | 35s startup window allows safe system boot; 1.12s normal timeout detects software hangs - reduces false resets while ensuring reliability |
| Guaranteed operation down to 0.8V | Valid reset state maintained even as VCC1 or VCC2 decays to 0.8V - critical for graceful shutdown during brownout conditions |
Applications
| Telecom Power Management | Industrial Multivoltage Control |
|---|---|
|
Use Scenario: Monitoring primary 48V-derived 5V rail and isolated 1.2V FPGA core supply in 5G base station power module. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset to baseband processor and FPGA upon either rail collapse; RSTIN used for -12V bias supply monitoring. Use Value: Prevents partial initialization and metastability by holding reset until both rails stabilize above 4.625V and 1.388V respectively, with 210ms hold time ensuring complete power sequencing. |
Use Scenario: Supervising 24V fieldbus input, 3.3V I/O controller, and 1.8V sensor ADC in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Primary supervisor for main and auxiliary rails; RSTIN configured to monitor 24V-to-5V pre-regulator output via resistor divider. Use Value: Enables single-chip supervision of three critical rails with <10µA quiescent current - extends battery backup runtime during AC loss events. |
| Automotive Infotainment | Medical Diagnostic Equipment |
|
Use Scenario: Validating 5V MCU supply and 1.3V SoC core voltage in head-unit ECU operating across –40°C to +105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100-compliant dual-supply monitor with watchdog; RSTIN tied to 3.3V display interface rail for fail-safe shutdown. Use Value: Ensures deterministic reset behavior over full automotive temperature range and immune to <20µs VCC transients - meets ISO 16750-2 pulse immunity requirements. |
Use Scenario: Supervising 5V analog front-end, 3.3V digital controller, and 1.2V imaging sensor supply in portable ultrasound device. IC Role / Device Role / Timing Role: Dual-supply supervisor with manual-reset (MR) for service mode; RSTIN used for battery voltage monitoring during standby. Use Value: Low 10µA ICC enables >10-year shelf life on coin-cell backup; 210ms timeout accommodates slow-start medical-grade LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724AUTWGD3+T | Push-pull RST output (vs. open-drain); identical thresholds, timeout, and pinout | Requires no external pullup; incompatible with bidirectional μP reset pins without series resistor | Select when driving simple CMOS inputs or when minimizing external components is prioritized over μP compatibility |
| TPS3808G33DBVR | Single-supply (3.3V only), no RSTIN, 200ms timeout, 1.5µA ICC - lower power but no dual-rail capability | Limited to 3.3V systems; lacks secondary rail monitoring and adjustable third-input functionality | Choose only for cost-sensitive, single-rail applications where VCC2 supervision and RSTIN are unnecessary |
Compared with MAX6724AUTWGD3+T, the MAX6723AUTWGD3+T offers superior interoperability with bidirectional reset interfaces; versus TPS3808G33DBVR, it delivers essential dual-rail supervision and flexible third-voltage monitoring at the cost of higher quiescent current - making it the only viable option for multivoltage safety-critical systems.
Availability
MAX6723AUTWGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6723AUTWGD3+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 high-performance analog and mixed-signal ICs for power, sensing, and communication applications, with emphasis on reliability and integration.
The MAX6715A–MAX6729A family targets compact, robust power-supply supervision in space-constrained, high-reliability systems - delivering dual/three-rail monitoring, watchdog, and manual-reset functions in sub-3mm² SOT23 packages.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6723AUTWGD3+T?
The MAX6723AUTWGD3+T has factory-trimmed reset thresholds of 4.625V (typ) for VCC1 (W suffix) and 1.388V (typ) for VCC2 (D suffix), with ±125mV tolerance over temperature. These values are confirmed in the Electrical Characteristics table of the official Maxim datasheet and apply specifically to the MAX6723AUTWGD3+T variant.
Does the MAX6723AUTWGD3+T include a watchdog timer, and what are its timing parameters?
Yes, the MAX6723AUTWGD3+T includes a dual-mode watchdog timer: 35s minimum startup period after reset, followed by 1.12s minimum normal timeout. These values are specified in the Electrical Characteristics section and are enabled when WDI is connected; leaving WDI unconnected disables the watchdog function entirely.
What package type and pin count does the MAX6723AUTWGD3+T use?
The MAX6723AUTWGD3+T uses a 6-pin SOT23 package (package code U6+1), with 1.6mm × 2.9mm body size and 0.95mm pitch. Pin configuration is fully documented in the "Pin Description" section of the Maxim datasheet and matches the MAX6723A variant's SOT23-6 layout.
Can the MAX6723AUTWGD3+T monitor a third voltage, and how is it implemented?
Yes - the MAX6723AUTWGD3+T supports third-voltage monitoring via the RSTIN pin, which references an internal 626.5mV bandgap. A resistor divider connected between the target rail and ground sets the trip point; for example, a 100kΩ/100kΩ divider on a 1.25V rail yields ~625mV at RSTIN, triggering reset at ~1.25V.
Is the MAX6723AUTWGD3+T qualified for automotive applications?
The MAX6723AUTWGD3+T itself is not AEC-Q100 qualified; however, the closely related MAX6719AUTTWD1/V+T is explicitly listed as AEC-Q100 qualified in the datasheet. For automotive use, designers should verify qualification status per part number - MAX6723AUTWGD3+T is intended for industrial and telecom applications with –40°C to +125°C operation.
MAX6723AUTWGD3+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:
- 1.11V, 1.665V, 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
MAX6723AUTWGD3+T FAQ
1.How can I place an order for MAX6723AUTWGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723AUTWGD3+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 MAX6723AUTWGD3+T reliable?
The price and inventory of MAX6723AUTWGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723AUTWGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723AUTWGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723AUTWGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723AUTWGD3+T?
MAX6723AUTWGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723AUTWGD3+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 MAX6723AUTWGD3+T?
For technical support, including MAX6723AUTWGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723AUTWGD3+T requirements.
6.How does Aetrix verify that MAX6723AUTWGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723AUTWGD3+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 MAX6723AUTWGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723AUTWGD3+T?
All MAX6723AUTWGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723AUTWGD3+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 MAX6723AUTWGD3+T part is unused and in its original packaging.
Return procedure for MAX6723AUTWGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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