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Analog Devices Inc./Maxim Integrated MAX6723UTTGD3+
- Part No.:
- MAX6723UTTGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTTGD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,975
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Product details
Overview
MAX6723UTTGD3+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 3.075V (VTH1) and 3.075V (VTH2), 210ms reset timeout, and open-drain active-low RST output. It ensures reliable system reset during brownout, power-up, or manual intervention in multivoltage embedded systems.
For engineers reviewing the MAX6723UTTGD3+ datasheet, MAX6723UTTGD3+ pinout, MAX6723UTTGD3+ application, or MAX6723UTTGD3+ equivalent, key selection criteria include dual/third-supply monitoring capability, guaranteed reset validity down to VCC = 0.8V, watchdog-free configuration, and compatibility with low-noise, battery-operated, or telecom-grade power sequencing requirements.
Technical Context
The MAX6723UTTGD3+ implements independent voltage comparators for VCC1 and VCC2 with ±1.5% threshold accuracy over temperature, plus a high-impedance RSTIN input referenced to a 626.5mV internal bandgap. Reset assertion occurs when any monitored supply falls below its threshold and remains asserted for a minimum 210ms timeout after all supplies recover.
No watchdog timer or power-fail comparator is integrated - this variant is configured specifically for triple-supply monitoring with manual reset (MR) support and open-drain RST output only. The device operates across -40°C to +85°C and draws just 14µA typical supply current at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V (typ), ±1.5% tolerance - sets primary supply brownout detection point for 3.3V rail monitoring |
| VCC2 Threshold | 3.075V (typ), ±1.5% tolerance - enables secondary supply supervision matching VCC1 in symmetric dual-rail systems |
| RSTIN Threshold | 626.5mV (typ), 25nA input leakage - allows external resistor divider to monitor third supply as low as 0.62V |
| Reset Timeout | 210ms (min), 280ms (max) - ensures µP reset pulse meets boot initialization timing requirements |
| Supply Current | 14µA (typ) at 3.6V - supports ultra-low-power operation in battery-backed or energy-constrained designs |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments without derating |
| Reset Output | Open-drain, active-low RST - requires external pullup; compatible with bidirectional µP reset pins and mixed-voltage I/O |
Pinout & Package
MAX6723UTTGD3+ uses a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free, RoHS-compliant. Pin 1 is marked with a dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserts low on VCC1/VCC2/RSTIN undervoltage or MR low; requires external pullup |
| 2 | GND | Analog/digital ground reference; must be connected to system common ground plane for stable threshold operation |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; 1µs minimum pulse width; immune to <100ns glitches |
| 4 | VCC2 | Secondary supply input; powers internal circuitry when > VCC1; sets VTH2 threshold reference and RST2 logic level if present |
| 5 | RSTIN | Adjustable third-supply monitor input; high-impedance node referenced to 626.5mV internal reference; connects to resistor divider |
| 6 | VCC1 | Primary supply input; powers device when > VCC2; sets VTH1 threshold reference and RST output logic level |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous supervision of VCC1 (3.075V), VCC2 (3.075V), and RSTIN (via 626.5mV reference) - eliminates need for discrete comparators in 3-rail systems |
| Guaranteed reset validity | Reset output remains valid down to VCC1 or VCC2 = 0.8V - ensures deterministic behavior during deep brownout conditions |
| Low quiescent current | 14µA typical ICC at 3.6V - extends battery life in portable equipment and reduces self-heating in sealed enclosures |
| Immunity to VCC transients | Withstands negative-going VCC glitches ≤20µs (at 100mV overdrive) - prevents spurious resets in noisy power environments |
| Manual reset integration | MR pin with internal 50kΩ pullup and 100ns glitch rejection - enables pushbutton reset without external components or debounce circuitry |
Applications
| Telecom Line Card Power Sequencing | Industrial PLC Dual-Rail Monitoring |
|---|---|
|
Use Scenario: Supervising 3.3V core, 3.3V I/O, and 1.2V auxiliary rails on a telecom line card with strict power-up order and brownout recovery. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting synchronized reset across all rails when any supply drops below 3.075V or 0.626V (RSTIN-derived), with 210ms hold time. Use Value: Prevents partial initialization and latch-up by ensuring all subsystems reset together - critical for SERDES and FPGA configuration integrity. |
Use Scenario: Monitoring redundant 24V DC-to-3.3V and 24V DC-to-5V converter outputs in an industrial programmable logic controller. IC Role / Device Role / Timing Role: Detecting simultaneous failure of both converters via VCC1/VCC2 inputs, while using RSTIN to monitor backup battery voltage (via divider). Use Value: Enables fail-safe shutdown before control logic corruption - leverages guaranteed reset down to 0.8V to catch marginal converter droop. |
| Medical Portable Ultrasound Battery Management | Set-Top Box Multivoltage SoC Initialization |
|
Use Scenario: Managing power-on reset for battery-powered ultrasound handheld with 3.3V main, 1.8V sensor, and 5V display rails. IC Role / Device Role / Timing Role: Using VCC1=3.3V, VCC2=1.8V, and RSTIN to monitor battery voltage (e.g., 3.0V cutoff via 4.7MΩ/1MΩ divider) - all three thresholds independently configurable. Use Value: Extends usable battery capacity by enabling precise low-voltage cutoff without additional ADC or firmware overhead. |
Use Scenario: Ensuring clean boot of a set-top box SoC requiring coordinated reset of 1.2V core, 3.3V I/O, and 5V tuner supplies. IC Role / Device Role / Timing Role: Configured with matched VTH1/VTH2 = 3.075V to supervise dual 3.3V rails (I/O + USB PHY), while RSTIN monitors 5V tuner supply. Use Value: Eliminates boot hangs caused by out-of-spec 5V rail - RSTIN's 626.5mV reference enables accurate 5V monitoring with <1% error using standard 1% resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTTGD3+ | Same pinout, identical thresholds and timeout, but features push-pull RST output instead of open-drain | Requires no external pullup; incompatible with bidirectional µP reset pins unless series resistor added | Select MAX6724UTTGD3+ when driving CMOS-only loads or when board space prohibits pullup resistor placement |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN); fixed 3.3V VDD threshold; 200ms timeout; 2.5µA IQ; SOT23-6 | Lacks third-supply monitoring capability; unsuitable for systems requiring auxiliary rail supervision | Choose TPS3808G33DBVR only for cost-sensitive dual-rail applications where RSTIN functionality is unnecessary |
Compared with MAX6723UTTGD3+, MAX6724UTTGD3+ simplifies BOM by removing the pullup resistor but sacrifices interface flexibility with bidirectional processors, while TPS3808G33DBVR reduces supply current by 85% but eliminates the critical third-monitoring channel required for complex multivoltage systems.
Availability
MAX6723UTTGD3+ is available at Aetrix Electronics and suitable for telecom line cards, industrial PLCs, medical portable devices, and set-top boxes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6723UTTGD3+ 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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6715–MAX6729 family was designed to replace discrete reset circuits in space-constrained multivoltage systems, delivering integrated dual/triple supervision with minimal footprint and guaranteed reset behavior under brownout conditions.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6723UTTGD3+?
The MAX6723UTTGD3+ has factory-trimmed reset thresholds of 3.075V (typical) for both VCC1 and VCC2, with ±1.5% tolerance over temperature. This corresponds to suffix "T" per the Reset Voltage Threshold Suffix Guide - confirmed in the Electrical Characteristics table where VTH1 and VTH2 both list 3.000V/3.075V/3.150V (min/typ/max). These values ensure reliable supervision of standard 3.3V rails.
Does the MAX6723UTTGD3+ include a watchdog timer or power-fail comparator?
No, the MAX6723UTTGD3+ does not include a watchdog timer or power-fail comparator. Per the Selector Guide, MAX6723 is marked with "√" under "MANUAL RESET" and "-" under "WATCHDOG INPUT" and "POWER-FAIL INPUT/OUTPUT". Its feature set is limited to triple-supply monitoring (VCC1, VCC2, RSTIN), manual reset (MR), and open-drain RST output - making it a streamlined option for systems that do not require those advanced functions.
What is the function of the RSTIN pin on the MAX6723UTTGD3+ and how is it used?
The RSTIN pin on the MAX6723UTTGD3+ is a high-impedance input referenced to an internal 626.5mV bandgap voltage, enabling supervision of a third supply voltage. To use it, connect an external resistor divider between the target supply and ground, with the midpoint feeding RSTIN. When the divided voltage falls below 626.5mV, RST asserts. Input leakage is only ±25nA, allowing use of high-value resistors to minimize power draw - a key design advantage for battery-powered systems.
What is the reset timeout period for the MAX6723UTTGD3+ and how is it set?
The MAX6723UTTGD3+ has a reset timeout period of 210ms (minimum), 280ms (maximum), as indicated by the "D3" suffix in the part number per the Reset Timeout Period Suffix Guide. This value is factory-programmed and non-adjustable. The timeout begins when reset is asserted and continues after all monitored supplies exceed their thresholds, ensuring sufficient hold time for microprocessor initialization - critical for reliable boot in FPGA- or ARM-based systems.
Can the MAX6723UTTGD3+ operate reliably during deep supply brownout conditions?
Yes, the MAX6723UTTGD3+ guarantees valid reset output logic state down to VCC1 or VCC2 = 0.8V, as explicitly stated in the General Description and Electrical Characteristics. This means the device continues to monitor and assert reset correctly even as supplies sag significantly - a critical capability for detecting marginal converter performance and preventing corrupted firmware execution in industrial or automotive environments.
MAX6723UTTGD3+ 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, 3.075V, 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
MAX6723UTTGD3+ FAQ
1.How can I place an order for MAX6723UTTGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTTGD3+ 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 MAX6723UTTGD3+ reliable?
The price and inventory of MAX6723UTTGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTTGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6723UTTGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTTGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTTGD3+?
MAX6723UTTGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTTGD3+ 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 MAX6723UTTGD3+?
For technical support, including MAX6723UTTGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTTGD3+ requirements.
6.How does Aetrix verify that MAX6723UTTGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6723UTTGD3+ 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 MAX6723UTTGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6723UTTGD3+?
All MAX6723UTTGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTTGD3+, 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 MAX6723UTTGD3+ part is unused and in its original packaging.
Return procedure for MAX6723UTTGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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