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Analog Devices Inc./Maxim Integrated MAX6723AUTRVD3+
- Part No.:
- MAX6723AUTRVD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723AUTRVD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,997
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Product details
Overview
MAX6723AUTRVD3+ from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit with factory-trimmed reset thresholds (VTH1 = 3.075 V, VTH2 = 1.388 V), 140 ms minimum reset timeout, and adjustable RSTIN input for third-voltage monitoring down to 0.626 V. It features open-drain active-low RST output, manual-reset input (MR), watchdog timer (WDI), and operates from -40°C to +125°C in a 6-pin SOT23 package. Used in multivoltage telecom power systems to ensure reliable μP reset during brownout conditions.
For engineers reviewing the MAX6723AUTRVD3+ datasheet, MAX6723AUTRVD3+ pinout, MAX6723AUTRVD3+ application, or MAX6723AUTRVD3+ equivalent, key selection criteria include dual-threshold voltage monitoring accuracy, guaranteed reset validity down to VCC = 0.8 V, 140 ms timeout timing precision, and compatibility with low-noise manual-reset and watchdog supervision in automotive-grade industrial designs.
Technical Context
The MAX6723AUTRVD3+ integrates two independent voltage comparators for primary (VCC1) and secondary (VCC2) supply monitoring, with factory-trimmed thresholds of 3.075 V (±0.075 V) and 1.388 V (±0.038 V), respectively. Its RSTIN input uses an internal 626 mV reference to support externally adjustable third-voltage supervision via resistor divider.
It implements a dual-mode watchdog timer: 35 s minimum startup period after reset, followed by 1.12 s minimum normal timeout on WDI transitions. The open-drain RST output asserts low when any monitored supply falls below threshold or MR is pulled low, and remains asserted for ≥140 ms after recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 3.075 V (typ), ±0.075 V tolerance - sets precise brownout detection point for main system rail |
| VCC2 Reset Threshold | 1.388 V (typ), ±0.038 V tolerance - enables accurate monitoring of low-voltage core or I/O supplies |
| RSTIN Threshold Voltage | 626 mV (typ), ±15.5 mV - internal reference enabling third-voltage supervision down to 0.62 V with external divider |
| Reset Timeout Period | 140 ms (min), 210 ms (typ), 280 ms (max) - ensures sufficient hold time for full μP initialization before release |
| Supply Current (ICC1) | 10 µA (typ) at 3.6 V - ultra-low quiescent current preserves battery life in portable equipment |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
| Reset Output Type | Open-drain, active-low RST - supports flexible pullup configuration and logic-level translation |
Pinout & Package
MAX6723AUTRVD3+ is housed in a 6-pin SOT23 package (2.9 mm × 1.6 mm × 1.1 mm), optimized for space-constrained PCB layouts. Pin functions are validated per Maxim's official pin description table for MAX6723A variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserts when VCC1/VCC2/RSTIN fall below threshold or MR is pulled low |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Active-low manual-reset input with 50 kΩ internal pullup to VCC1; forces reset on logic-low pulse ≥1 µs |
| 4 | VCC2 | Secondary supply input (0.8–5.5 V); powers internal circuitry when above VCC1 and defines VTH2 comparator reference |
| 5 | VCC1 | Primary supply input (0.8–5.5 V); powers device when above VCC2 and defines VTH1 comparator reference |
| 6 | RSTIN | Adjustable undervoltage monitor input; compares external divided voltage against 626 mV internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC1 (3.075 V) and VCC2 (1.388 V) with separate comparators and hysteresis |
| Externally adjustable third-voltage monitor | RSTIN input with 626 mV reference enables precise supervision of auxiliary rails (e.g., 1.2 V, 1.8 V, 2.5 V) using resistor dividers |
| Dual-mode watchdog timer | 35 s startup delay after reset + 1.12 s normal timeout - accommodates long boot sequences while ensuring rapid fault response |
| Guaranteed reset validity down to 0.8 V | Ensures correct RST logic state even during deep brownout, critical for fail-safe operation in automotive power domains |
| Immunity to short VCC transients | Rejects sub-20 µs negative glitches up to 100 mV overdrive - prevents spurious resets in noisy power environments |
Applications
| Telecom Power Management | Automotive Infotainment |
|---|---|
|
Use Scenario: Monitoring dual DC-DC outputs (5 V and 1.2 V) in base station line cards where brownout must trigger controlled μP reboot without data corruption. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting open-drain RST to hold μP in reset until both rails stabilize above 3.075 V and 1.388 V, with 140 ms timeout ensuring safe firmware reload. Use Value: Prevents execution from corrupted memory during partial power-up, reducing field failure rates in carrier-class equipment. |
Use Scenario: Supervising 3.3 V I/O and 1.1 V core supplies in head-unit SoC modules exposed to cold-crank voltage dips. IC Role / Device Role / Timing Role: Guarantees valid reset assertion down to VCC = 0.8 V, enabling fail-safe shutdown before logic instability occurs during 4.5 V cranking events. Use Value: Eliminates need for external brownout detectors, saving board space and BOM cost in AEC-Q100-aligned designs. |
| Industrial PLC Controllers | Portable Medical Devices |
|
Use Scenario: Ensuring deterministic reset behavior across 24 V DC input-derived 5 V and 3.3 V rails in programmable logic controllers operating in electrically noisy factory floors. IC Role / Device Role / Timing Role: Uses MR input for operator-initiated diagnostics reset and RSTIN to monitor isolated sensor supply, all coordinated through single 140 ms timeout window. Use Value: Enables unified reset sequencing across multiple subsystems, simplifying firmware validation and reducing test coverage gaps. |
Use Scenario: Managing power-on reset and low-battery warning in handheld ultrasound units powered by Li-ion batteries with variable discharge profiles. IC Role / Device Role / Timing Role: Leverages RSTIN to monitor battery voltage via resistor divider, triggering early warning interrupt (PFO) and hard reset (RST) at distinct thresholds. Use Value: Extends usable runtime by decoupling graceful shutdown (PFO) from forced reset (RST), improving clinical workflow continuity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724AUTRVD3+ | Push-pull RST output (vs. open-drain); identical thresholds, timeout, and pinout | Requires no external pullup; better suited for direct connection to μP reset pins with weak internal pullups | Select MAX6724AUTRVD3+ when driving reset inputs lacking strong external pullup or needing higher noise immunity |
| TPS3808G33DBVR | Single-supply (3.3 V only), fixed 3.08 V threshold, 200 ms timeout; no RSTIN or WDI | Lacks dual-voltage monitoring, adjustable third input, and watchdog - suitable only for simpler 3.3 V-only systems | Choose TPS3808G33DBVR only if design uses only one monitored rail and requires TI-qualified supply chain |
Compared with MAX6724AUTRVD3+, the MAX6723AUTRVD3+ offers open-drain flexibility for level-shifting and shared-bus reset arbitration; versus TPS3808G33DBVR, it delivers essential dual-rail supervision, third-voltage adjustability, and watchdog capability required for complex embedded systems.
Availability
MAX6723AUTRVD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, automotive infotainment, and industrial PLC applications requiring stable component supply, extended temperature operation, and AEC-Q100-aligned reliability.
Supply support for MAX6723AUTRVD3+ 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 demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail systems where precise, independent monitoring of primary and secondary supplies-plus optional third-rail supervision-is essential for system-level safety and reliability.
FAQ
What are the exact reset threshold voltages for MAX6723AUTRVD3+?
The MAX6723AUTRVD3+ has factory-trimmed reset thresholds of 3.075 V (VTH1, ±0.075 V) for VCC1 and 1.388 V (VTH2, ±0.038 V) for VCC2, as defined by the "RV" suffix in its ordering code. These values are guaranteed over -40°C to +125°C and enable precise brownout detection for 3.3 V and 1.2 V rails. The MAX6723AUTRVD3+ datasheet specifies these tolerances in the Electrical Characteristics table.
Does MAX6723AUTRVD3+ support watchdog functionality?
Yes, MAX6723AUTRVD3+ includes a dual-mode watchdog timer with a 35 s minimum startup period after reset and a 1.12 s minimum normal timeout period. The WDI pin monitors processor activity: if no edge transition occurs within the timeout, RST asserts for 140 ms. Watchdog is disabled by leaving WDI unconnected, and the MAX6723AUTRVD3+ uses a 200 nA internal current source for this detection.
What is the function of the RSTIN pin on MAX6723AUTRVD3+?
The RSTIN pin on MAX6723AUTRVD3+ serves as an adjustable undervoltage monitor input referenced to an internal 626 mV threshold. When used with an external resistor divider, it enables supervision of a third supply voltage (e.g., 1.8 V, 2.5 V) down to 0.62 V. The MAX6723AUTRVD3+ asserts RST low when RSTIN falls below 626 mV, providing flexible triple-rail monitoring without additional ICs.
Is MAX6723AUTRVD3+ compatible with 0.8 V supply operation?
Yes, MAX6723AUTRVD3+ guarantees valid reset output logic states when either VCC1 or VCC2 remains ≥0.8 V - a critical feature for automotive cold-crank scenarios. This specification is explicitly confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections of the MAX6723AUTRVD3+ datasheet, ensuring fail-safe behavior during deep brownout conditions.
What package type and pin count does MAX6723AUTRVD3+ use?
MAX6723AUTRVD3+ is supplied in a 6-pin SOT23 package (2.9 mm × 1.6 mm × 1.1 mm), with pinout matching the MAX6723A series: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1, Pin 6 = RSTIN. This compact RoHS-compliant package supports high-density PCB layouts in space-constrained applications like telecom modules and automotive ECUs.
MAX6723AUTRVD3+ 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:
- 1.575V, 2.625V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6723AUTRVD3+ FAQ
1.How can I place an order for MAX6723AUTRVD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723AUTRVD3+ 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 MAX6723AUTRVD3+ reliable?
The price and inventory of MAX6723AUTRVD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723AUTRVD3+ is usually 5 days.
3.What payment methods are accepted for MAX6723AUTRVD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723AUTRVD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723AUTRVD3+?
MAX6723AUTRVD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723AUTRVD3+ 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 MAX6723AUTRVD3+?
For technical support, including MAX6723AUTRVD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723AUTRVD3+ requirements.
6.How does Aetrix verify that MAX6723AUTRVD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6723AUTRVD3+ 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 MAX6723AUTRVD3+ meets industry standards.
7.What is the process for return or replacement of MAX6723AUTRVD3+?
All MAX6723AUTRVD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723AUTRVD3+, 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 MAX6723AUTRVD3+ part is unused and in its original packaging.
Return procedure for MAX6723AUTRVD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6723AUTRVD3+ Tags
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MIC826SYMT-TR
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