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Analog Devices Inc./Maxim Integrated MAX6722UTTGD3+
- Part No.:
- MAX6722UTTGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6722UTTGD3+.pdf
- Description:
- MAX6722 DUAL/TRIPLE, ULTRA-LOW-V
- Quantity:
- Payment:
- Shipping:
Inventory:1,180
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Product details
Overview
MAX6722UTTGD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (4.625V threshold) and VCC2 (3.075V threshold) with 210ms reset timeout, push-pull active-low RST output, manual reset input, and watchdog timer. It ensures reliable system boot and brownout recovery in low-power embedded controllers.
For engineers reviewing the MAX6722UTTGD3+ datasheet, MAX6722UTTGD3+ pinout, MAX6722UTTGD3+ application, or MAX6722UTTGD3+ equivalent, key selection criteria include guaranteed reset validity down to VCC = 0.8V, 14µA typical supply current at 3.6V, immunity to short VCC transients, and dual-supply monitoring with factory-trimmed thresholds.
Technical Context
The MAX6722UTTGD3+ integrates two independent voltage comparators with precision internal references (±1.5% threshold accuracy), a programmable reset timeout timer, and a dual-mode watchdog (35s startup / 1.12s normal mode). Its push-pull RST output is referenced to VCC1 and sinks up to 3.2mA at 4.5V.
It features an internal 50kΩ pullup on MR, supports TTL/CMOS-compatible manual reset triggering, and guarantees correct reset logic state when either VCC1 or VCC2 ≥ 0.8V - enabling operation during deep brownout conditions without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, ±1.5% tolerance; monitors primary supply such as 5V or 4.8V rail) |
| VCC2 Reset Threshold | 3.075V (factory-trimmed, ±1.5% tolerance; monitors secondary supply such as 3.3V I/O rail) |
| Reset Timeout Period | 210ms (minimum; ensures µP completes power-on initialization before release) |
| Supply Current | 14µA typical at 3.6V (enables >10-year battery life in always-on monitoring applications) |
| Watchdog Timeout | 1.12s min normal mode (detects firmware hangs within real-time response window) |
| Operating Temperature | -40°C to +85°C (qualified for industrial-grade embedded systems) |
| Reset Output Type | Push-pull active-low RST (no external pullup required; drives directly into µP reset pin) |
Pinout & Package
MAX6722UTTGD3+ uses a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, lead-free (+ suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when VCC1/VCC2 drop below thresholds or MR is pulled low |
| 2 | GND | Ground reference for all internal comparators, timer, and output drivers |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; triggers reset on falling edge |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers core logic, sets RST output reference, and enables reset assertion |
| 6 | WDI | Watchdog input; rising/falling edge resets 1.12s timeout counter; long initial 35s mode allows full system boot |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage monitoring | VCC1 = 4.625V ±1.5%, VCC2 = 3.075V ±1.5% - eliminates external resistor dividers and calibration |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset behavior during deep brownout; no external pull-down needed for RST |
| Dual-mode watchdog timer | 35s startup window (for BIOS/Bootloader execution) + 1.12s runtime timeout (for application-level hang detection) |
| Immunity to short VCC transients | Rejects <20µs glitches at 100mV overdrive - prevents spurious resets in noisy power environments |
| Low quiescent current | 14µA typical at 3.6V - extends battery life in portable and remote sensor nodes |
Applications
| Industrial PLC Controller | Network Router Power Management |
|---|---|
|
Use Scenario: Monitors 5V main rail and 3.3V I/O rail in DIN-rail mounted programmable logic controller with isolated CAN/RS-485 interfaces. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring deterministic reset during AC line sags or DC-DC converter faults. Use Value: Prevents firmware corruption by holding µP in reset until both rails stabilize above 4.625V and 3.075V for ≥210ms. |
Use Scenario: Embedded in multi-rail PoE-powered router monitoring primary 12V-to-5V conversion and secondary 5V-to-3.3V LDO output. IC Role / Device Role / Timing Role: Brownout detector and watchdog enforcer for ARM-based network processor with boot-time watchdog window. Use Value: 35s initial watchdog period accommodates Linux kernel boot; 1.12s runtime timeout detects stuck packet forwarding threads. |
| Medical Infusion Pump | Smart Energy Meter |
|
Use Scenario: Battery-backed safety-critical infusion pump with dual Li-ion cell (8.4V) and regulated 3.3V MCU supply. IC Role / Device Role / Timing Role: Fail-safe supervisor asserting reset if main DC-DC drops below 4.625V or 3.3V LDO falls below 3.075V. Use Value: 14µA supply current minimizes standby drain; guaranteed reset at VCC ≥ 0.8V enables last-gasp fault logging before shutdown. |
Use Scenario: ANSI C12.20-certified electricity meter with isolated 3.3V metrology SoC and 5V communication module. IC Role / Device Role / Timing Role: Dual-rail monitor coordinating reset of metrology and comms subsystems during grid voltage dips. Use Value: Factory-trimmed thresholds eliminate BOM variance; 210ms timeout aligns with IEC 61000-4-11 immunity test hold times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6722UTTGD2+ | 140ms reset timeout (vs. 210ms); identical thresholds, package, and features | Suitable where shorter reset hold time is acceptable (e.g., faster-boot µPs) | Select MAX6722UTTGD2+ only if system timing budget requires <210ms reset assertion. |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no VCC2 input, no WDI, open-drain RST, 200ms timeout | Lacks dual-rail capability and watchdog; requires external pullup and separate VCC2 supervision | Use TPS3808G33DBVR only for single-rail 3.3V systems without watchdog needs. |
Compared with MAX6722UTTGD2+, the MAX6722UTTGD3+ provides longer reset assertion for robust boot sequencing; compared with TPS3808G33DBVR, it delivers integrated dual-rail monitoring and watchdog functionality in one SOT23-6 device - reducing board area and BOM count.
Availability
MAX6722UTTGD3+ is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6722UTTGD3+ 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 industrial, automotive, and communications markets, with emphasis on reliability, low power, and integration.
The MAX6715–MAX6729 family delivers ultra-low-voltage dual/triple supervisory circuits targeting space-constrained, battery-sensitive, and high-reliability embedded systems requiring deterministic reset behavior under brownout conditions.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6722UTTGD3+?
The MAX6722UTTGD3+ has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with ±1.5% tolerance over -40°C to +85°C. These values are encoded in the "TT" suffix per Maxim's Reset Voltage Threshold Suffix Guide and are verified in the Electrical Characteristics table of the official datasheet.
Does MAX6722UTTGD3+ support watchdog functionality, and what are its timing modes?
Yes, MAX6722UTTGD3+ includes a dual-mode watchdog timer: a 35s minimum startup period after any reset event (power-up, MR, or watchdog timeout), followed by a 1.12s minimum normal-mode timeout. The first valid WDI transition switches from startup to normal mode, enabling safe boot and responsive hang detection.
What is the reset timeout period of MAX6722UTTGD3+, and how is it set?
The MAX6722UTTGD3+ has a 210ms minimum reset timeout period, indicated by the "D3" suffix in the part number. This value is factory-programmed and non-adjustable; it defines the minimum duration RST remains asserted after all monitored supplies recover above their thresholds.
Is MAX6722UTTGD3+ compatible with 1.8V systems?
No - MAX6722UTTGD3+ is not suitable for 1.8V-only systems. Its VCC1 threshold is fixed at 4.625V and VCC2 at 3.075V; neither rail can be monitored below 0.9V for VCC2 or 1.58V for VCC1. For 1.8V/1.2V dual-rail monitoring, consider MAX6720 or MAX6724 variants with appropriate suffixes.
What package type and pin count does MAX6722UTTGD3+ use?
MAX6722UTTGD3+ uses a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm body size) with gull-wing leads. Pinout is standardized per Maxim's Pin Configurations table: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1, Pin 6 = WDI.
MAX6722UTTGD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.11V, 3.075V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6722UTTGD3+ FAQ
1.How can I place an order for MAX6722UTTGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722UTTGD3+ 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 MAX6722UTTGD3+ reliable?
The price and inventory of MAX6722UTTGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722UTTGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6722UTTGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722UTTGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722UTTGD3+?
MAX6722UTTGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722UTTGD3+ 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 MAX6722UTTGD3+?
For technical support, including MAX6722UTTGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722UTTGD3+ requirements.
6.How does Aetrix verify that MAX6722UTTGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6722UTTGD3+ 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 MAX6722UTTGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6722UTTGD3+?
All MAX6722UTTGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722UTTGD3+, 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 MAX6722UTTGD3+ part is unused and in its original packaging.
Return procedure for MAX6722UTTGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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