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Analog Devices Inc./Maxim Integrated MAX6723UTWGD3+
- Part No.:
- MAX6723UTWGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTWGD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,225
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Product details
Overview
MAX6723UTWGD3+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (auxiliary) supply rails with factory-trimmed thresholds of 4.625V/3.075V and 626.5mV reference, 210ms reset timeout, and open-drain active-low RST output. It ensures reliable system reset during brownout, power-up, or software fault in multivoltage embedded systems.
For engineers reviewing the MAX6723UTWGD3+ datasheet, MAX6723UTWGD3+ pinout, MAX6723UTWGD3+ application, or MAX6723UTWGD3+ equivalent, key selection criteria include triple-supply monitoring capability, guaranteed reset validity down to VCC = 0.8V, low 14µA typical supply current, immunity to short VCC transients, and compatibility with manual reset, watchdog timer, and power-fail signaling functions.
Technical Context
The MAX6723UTWGD3+ integrates dual independent voltage comparators for VCC1 and VCC2 supervision plus a high-impedance RSTIN input referenced to a 626.5mV internal bandgap, enabling precise third-rail monitoring via external resistor divider. Its reset logic asserts RST low when any monitored rail falls below its threshold and holds for a fixed 210ms minimum timeout after recovery.
This device implements an open-drain RST output with 0.4V max VOL at 3.2mA sink, supports manual reset via MR (internal 50kΩ pullup), and includes no watchdog or power-fail functionality-confirmed by Selector Guide and Pin Description tables showing WDI/PFI/PFO absent for MAX6723.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed falling threshold; ensures reset assertion before 4.63V rail collapse) |
| VCC2 Threshold | 3.075V (factory-trimmed falling threshold; matches common 3.3V I/O supply margin) |
| RSTIN Reference | 626.5mV (internal precision reference; enables monitoring of rails as low as 0.62V with external divider) |
| Reset Timeout | 210ms (minimum guaranteed delay; provides sufficient time for CPU initialization and peripheral stabilization) |
| Supply Current | 14µA typical at 3.6V (ultra-low quiescent draw; extends battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (industrial-grade range; suitable for telecom, networking, and industrial control environments) |
| Package | 6-pin SOT23 (2.9mm × 1.6mm footprint; enables compact PCB layout in space-constrained designs) |
Pinout & Package
MAX6723UTWGD3+ uses a 6-pin SOT23 package with exposed pad (not thermally enhanced). Pin assignments are validated per Maxim's official Pin Description table for MAX6723 series.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts low on VCC1/VCC2/RSTIN undervoltage or MR 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; internal 50kΩ pullup to VCC1; pulse ≥1µs forces reset regardless of supply status |
| 4 | VCC2 | Secondary supply input; powers internal circuitry when > VCC1; sets VCC2 reset threshold and RST2 reference (not used in MAX6723) |
| 5 | VCC1 | Primary supply input; powers device core; defines VCC1 reset threshold and RST output reference voltage |
| 6 | RSTIN | Auxiliary voltage monitor input; high-impedance (±25nA); compares against 626.5mV reference for third-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneous monitoring of VCC1 (4.625V), VCC2 (3.075V), and RSTIN (626.5mV ref) enables robust power sequencing in SoC/FPGA systems |
| Guaranteed reset validity | Operates correctly with VCC1 or VCC2 ≥ 0.8V - critical for brownout detection before complete power loss |
| Low supply current | 14µA typical ICC at 3.6V reduces system standby power - essential for battery-powered IoT nodes and wearables |
| Immunity to VCC transients | Withstands negative-going glitches ≤20µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Factory-trimmed accuracy | VTH1/VTH2 tolerances ±1.5% (max) and tempco ≤20ppm/°C ensure stable thresholds across temperature and unit variance |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring primary 4.8V DC-DC output, secondary 3.3V logic rail, and auxiliary 1.2V FPGA core voltage in remote radio units. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting open-drain RST to ARM Cortex-A processor upon any rail collapse, holding reset for 210ms post-recovery. Use Value: Prevents firmware execution on unstable supplies; eliminates need for discrete comparators and RC timers, reducing BOM count by 3 components. |
Use Scenario: Ensuring safe startup and fault response in DIN-rail mounted programmable logic controllers with mixed 24V field bus, 5V controller, and 3.3V communication IC rails. IC Role / Device Role / Timing Role: Supervising VCC1 (5V controller), VCC2 (3.3V UART/USB PHY), and RSTIN (derived from 24V field supply via resistor divider) to trigger system-wide reset. Use Value: Guarantees reset assertion even if 5V rail drops to 0.8V - critical for deterministic fail-safe behavior during brownout conditions. |
| Medical Diagnostic Handhelds | Automotive Infotainment Head Units |
Use Scenario: Managing power integrity in portable ultrasound scanners powered by Li-ion batteries, where VCC1 = 3.6V analog front-end, VCC2 = 3.3V digital subsystem, RSTIN = 1.8V ADC reference. IC Role / Device Role / Timing Role: Monitoring all three rails with 210ms timeout to prevent corrupted image acquisition during battery voltage sag. Use Value: 14µA supply current extends usable runtime between charges; RSTIN's 626.5mV reference enables accurate low-voltage rail tracking without external references. |
Use Scenario: Supervising 5V MCU supply, 3.3V display interface, and 1.1V DDR memory rail in automotive head units subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Providing reset coordination across multiple voltage domains using single IC, with MR pin tied to ignition switch for hard reset on key-off/key-on transition. Use Value: Immunity to sub-20µs VCC glitches avoids false resets during alternator noise; -40°C to +85°C rating meets AEC-Q200 ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTWGD3+ | Same pinout, same thresholds/timing, but push-pull RST output instead of open-drain | Requires no external pullup; incompatible with bidirectional µP reset pins without series resistor | Select MAX6724UTWGD3+ when driving CMOS inputs directly or when board layout prohibits external pullup placement |
| TPS3808G33DBVR | Dual-supply only (VDD, VDDIO), no RSTIN; 3.3V fixed VDD threshold; 200ms timeout; 1.6µA IQ | Lacks third-rail monitoring; lower supply current but cannot replace triple-monitoring function | Choose TPS3808G33DBVR only if system has exactly two rails and ultra-low IQ is prioritized over RSTIN flexibility |
Compared with MAX6723UTWGD3+, MAX6724UTWGD3+ offers simplified drive capability at the cost of µP interface compatibility, while TPS3808G33DBVR trades triple monitoring for significantly lower quiescent current - making MAX6723UTWGD3+ the sole option when auxiliary rail supervision is mandatory.
Availability
MAX6723UTWGD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, medical handhelds, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and guaranteed reset behavior under brownout conditions.
Supply support for MAX6723UTWGD3+ 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 power management, sensing, and interface applications, serving industrial, automotive, and communications markets.
The MAX6715–MAX6729 family delivers ultra-low-voltage supervisory circuits optimized for multivoltage systems where simultaneous monitoring of primary, secondary, and auxiliary rails is required - with emphasis on reliability, small size, and low power.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6723UTWGD3+?
The MAX6723UTWGD3+ has a factory-trimmed VCC1 reset threshold of 4.625V (typical falling threshold), with tolerance of ±1.5% over temperature. This value is encoded in the "W" suffix per Maxim's Reset Voltage Threshold Suffix Guide and confirmed in Electrical Characteristics Table on page 2 of the datasheet.
Does MAX6723UTWGD3+ include a watchdog timer function?
No, MAX6723UTWGD3+ does not include a watchdog timer. Per Maxim's Selector Guide and Pin Description, MAX6723 lacks WDI pin functionality - it is designated as a triple-supply supervisor without watchdog or power-fail features. Watchdog capability begins with MAX6721 and higher part numbers.
What is the purpose of the RSTIN pin on MAX6723UTWGD3+?
The RSTIN pin on MAX6723UTWGD3+ serves as an auxiliary voltage monitor input with a fixed 626.5mV internal reference. When the voltage at RSTIN falls below this threshold, the device asserts RST low. It enables monitoring of a third supply rail (e.g., 1.2V core) using an external resistor divider, extending supervision beyond VCC1 and VCC2.
Can MAX6723UTWGD3+ operate with VCC1 below 1.0V?
Yes, MAX6723UTWGD3+ guarantees valid reset output logic state down to VCC1 or VCC2 = 0.8V. Below 0.8V, reset behavior is not specified. This feature ensures deterministic reset assertion during deep brownout events before complete power loss - a key reliability differentiator versus basic reset ICs.
What package type and dimensions does MAX6723UTWGD3+ use?
MAX6723UTWGD3+ uses a 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm body height) with gull-wing leads. The "UT" in the part number explicitly denotes SOT23-6 packaging per Maxim's Ordering Information table, and the "+" suffix indicates lead-free RoHS-compliant construction.
MAX6723UTWGD3+ 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6723UTWGD3+ FAQ
1.How can I place an order for MAX6723UTWGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTWGD3+ 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 MAX6723UTWGD3+ reliable?
The price and inventory of MAX6723UTWGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTWGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6723UTWGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTWGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTWGD3+?
MAX6723UTWGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTWGD3+ 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 MAX6723UTWGD3+?
For technical support, including MAX6723UTWGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTWGD3+ requirements.
6.How does Aetrix verify that MAX6723UTWGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6723UTWGD3+ 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 MAX6723UTWGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6723UTWGD3+?
All MAX6723UTWGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTWGD3+, 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 MAX6723UTWGD3+ part is unused and in its original packaging.
Return procedure for MAX6723UTWGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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