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Analog Devices Inc./Maxim Integrated MAX6723UTTGD3+T
- Part No.:
- MAX6723UTTGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTTGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6723UTTGD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and RSTIN (adjustable down to 0.626V) with 210ms reset timeout, push-pull active-low RST output, manual reset input, and watchdog timer - used in telecom power management and multivoltage embedded systems.
For engineers reviewing the MAX6723UTTGD3+T datasheet, MAX6723UTTGD3+T pinout, MAX6723UTTGD3+T application, or MAX6723UTTGD3+T equivalent, this page delivers verified functional identity, exact threshold values, watchdog timing behavior, reset output drive capability, and validated alternative options for dual/triple-supply supervision in industrial and networking equipment.
Technical Context
The MAX6723UTTGD3+T implements a triple-threshold supervision architecture: primary supply (VCC1) monitored at 4.625V ±125mV, secondary supply (VCC2) at 3.075V ±75mV, and auxiliary voltage via high-impedance RSTIN referenced to 626.5mV internal bandgap. It asserts an active-low push-pull RST output when any monitored voltage falls below its threshold and holds reset for 210ms (min) after recovery.
It integrates a dual-mode watchdog timer (35s startup / 1.12s normal timeout), manual reset input with 50kΩ internal pullup, and operates reliably down to VCC1 or VCC2 = 0.8V. No power-fail or PFO functionality is included - confirmed by Selector Guide and Pin Configuration tables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance) - sets precise brownout detection for 5V or 4.8V system rails |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance) - enables reliable monitoring of 3.3V I/O or auxiliary supplies |
| RSTIN Reference | 626.5mV internal reference - allows external resistor-divider to monitor third supply as low as 0.62V |
| Reset Timeout | 210ms (minimum) - ensures sufficient processor reset hold time across temperature and voltage variations |
| Supply Current | 14µA typical at 3.6V - supports ultra-low-power battery-backed or always-on supervision |
| Watchdog Timeout | 35s min startup / 1.12s min normal mode - accommodates long boot sequences then enforces tight software execution checks |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments |
Pinout & Package
MAX6723UTTGD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), lead-free, RoHS-compliant, with gull-wing leads and standard thermal pad layout per JEDEC MO-178AB.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; sinks 3.2mA at VCC1 ≥ 4.5V; no external pullup required |
| 2 | GND | Analog/digital ground reference for all internal comparators, timers, and output drivers |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width; immune to <100ns glitches |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and RST2 logic (not present on MAX6723) |
| 5 | RSTIN | High-impedance adjustable reset input (626.5mV reference); monitors third supply via external resistor divider; 25nA max input current |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core, VCC1 comparator, watchdog, and RST output driver |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneous monitoring of VCC1 (4.625V), VCC2 (3.075V), and RSTIN (0.626V ref) - eliminates need for three discrete supervisors |
| Dual-mode watchdog timer | 35s startup window enables full system initialization; 1.12s normal timeout detects stalled firmware without false triggers during boot |
| Push-pull RST output | Drives active-low reset directly into µP reset pin without external pullup; supports 3.2mA sink at 4.5V - simplifies BOM and layout |
| Guaranteed reset validity | Functional reset assertion guaranteed down to VCC1 or VCC2 = 0.8V - ensures reliability during deep brownout conditions |
| Low quiescent current | 14µA typical ICC1 at 3.6V - extends battery life in portable equipment and reduces self-heating in dense PCB layouts |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring 48V DC-DC converter output (5V rail), 3.3V FPGA I/O supply, and 1.2V core voltage in remote radio unit. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting synchronized reset to ARM Cortex-M7 and FPGA upon any rail undervoltage. Use Value: Prevents partial configuration and metastability by holding reset until all three rails stabilize above thresholds for ≥210ms. |
Use Scenario: Supervising 24V field bus interface, 5V logic supply, and 3.3V microcontroller core in DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Provides deterministic reset initiation and watchdog enforcement for real-time control loop integrity. Use Value: Dual-mode watchdog (35s boot / 1.12s runtime) ensures safe startup under variable load while catching firmware hangs during operation. |
| Network Switch ASIC Boot | Battery-Backed Data Logger |
Use Scenario: Validating 12V PoE midspan supply, 3.3V PHY interface, and 1.8V switch ASIC core before enabling PCIe link training. IC Role / Device Role / Timing Role: Acts as power-good arbiter and reset coordinator between PMIC and ASIC during cold start and hot-plug events. Use Value: Factory-trimmed 4.625V/3.075V thresholds match ASIC vendor's recommended power sequencing margins. |
Use Scenario: Monitoring main Li-ion (3.6V), backup coin cell (3.0V), and sensor analog supply (2.5V) in environmental data logger. IC Role / Device Role / Timing Role: Enables graceful shutdown and nonvolatile state save when main supply drops below 3.6V threshold. Use Value: RSTIN input configured for 2.5V rail via resistor divider provides third-point supervision without adding discrete components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTTGD3+T | Same pinout, same thresholds and timeout, but push-pull RST output replaced with open-drain RST - requires external pullup resistor | Suitable where µP reset pin is bidirectional or open-drain compatible; not ideal for direct-drive push-pull interfaces | Select MAX6724UTTGD3+T only if board already includes RST pullup or µP accepts open-drain reset signaling |
| TPS3808G33DBVR | Dual-supply monitor (no RSTIN), fixed 3.3V VDD threshold, 200ms timeout, 1.8µA ICC - lacks third-voltage monitoring and dual-mode watchdog | Limited to two-rail systems; no adjustable third input or long-startup watchdog - insufficient for complex boot sequences | Choose TPS3808G33DBVR only for cost-sensitive dual-rail designs where RSTIN and extended watchdog are unnecessary |
Compared with MAX6723UTTGD3+T, MAX6724UTTGD3+T trades push-pull drive for open-drain flexibility, while TPS3808G33DBVR reduces feature set to cut cost and current - neither matches the integrated triple-monitoring, programmable RSTIN, and dual-mode watchdog of the MAX6723UTTGD3+T.
Availability
MAX6723UTTGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and network switch designs requiring stable component supply, long-lifecycle support, and guaranteed factory-trimmed voltage thresholds.
Supply support for MAX6723UTTGD3+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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers compact, ultra-low-power supervisory solutions for multivoltage systems - engineered to replace discrete reset circuits and reduce board space in space-constrained embedded platforms.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6723UTTGD3+T?
The MAX6723UTTGD3+T has a factory-trimmed VCC1 reset threshold of 4.625V, with ±125mV tolerance over temperature and voltage. This value is encoded in the "TG" suffix per Maxim's Reset Voltage Threshold Suffix Guide and confirmed in the Electrical Characteristics table (VTH1 = 4.625V typical). The MAX6723UTTGD3+T uses this precise threshold to supervise 5V or 4.8V system rails without external calibration.
Does MAX6723UTTGD3+T support power-fail monitoring (PFI/PFO)?
No, MAX6723UTTGD3+T does not include power-fail input (PFI) or power-fail output (PFO) functionality. Per the Selector Guide and Pin Configuration tables, only MAX6728/MAX6729 variants support PFI/PFO. The MAX6723UTTGD3+T provides RSTIN for third-voltage monitoring but lacks dedicated power-fail comparator circuitry - confirmed by absence of PFI/PFO pins and related features in its ordering and functional diagrams.
What is the watchdog timeout behavior of MAX6723UTTGD3+T?
The MAX6723UTTGD3+T implements a dual-mode watchdog: 35s minimum initial timeout after any reset event (power-up, MR, or watchdog timeout), followed by 1.12s minimum normal timeout after the first valid WDI transition. This architecture ensures safe boot completion before enforcing strict firmware liveness checks. The MAX6723UTTGD3+T's WDI pin must receive a rising or falling edge within 1.12s during normal operation to prevent reset assertion.
Is MAX6723UTTGD3+T pin-compatible with other MAX67xx devices in SOT23-6?
Yes, MAX6723UTTGD3+T shares identical 6-pin SOT23-6 pinout with MAX6715–MAX6722 and MAX6724, including RST (pin 1), GND (pin 2), MR (pin 3), VCC2 (pin 4), RSTIN (pin 5), and VCC1 (pin 6). However, functional differences exist: MAX6723UTTGD3+T includes RSTIN but excludes PFI/PFO and RST2 - verified by Pin Description table and Selector Guide. Board-level compatibility requires matching feature requirements.
What is the maximum supply voltage the MAX6723UTTGD3+T can tolerate on VCC1 and VCC2?
The MAX6723UTTGD3+T supports VCC1 and VCC2 up to +5.5V absolute maximum, per Absolute Maximum Ratings. Operation is specified from 0.8V to 5.5V, with VCC1 monitoring range 1.8V–5.0V and VCC2 0.9V–3.3V. Exceeding 5.5V risks permanent damage; sustained operation above 5.0V on VCC1 or 3.3V on VCC2 violates functional specifications even if below absolute max - confirmed in both General Description and Electrical Characteristics sections.
MAX6723UTTGD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6723UTTGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTTGD3+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 MAX6723UTTGD3+T reliable?
The price and inventory of MAX6723UTTGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTTGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6723UTTGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTTGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTTGD3+T?
MAX6723UTTGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTTGD3+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 MAX6723UTTGD3+T?
For technical support, including MAX6723UTTGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTTGD3+T requirements.
6.How does Aetrix verify that MAX6723UTTGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6723UTTGD3+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 MAX6723UTTGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6723UTTGD3+T?
All MAX6723UTTGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTTGD3+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 MAX6723UTTGD3+T part is unused and in its original packaging.
Return procedure for MAX6723UTTGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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