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Analog Devices Inc./Maxim Integrated MAX6722AUTTGD2+T
- Part No.:
- MAX6722AUTTGD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6722AUTTGD2+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,071
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Product details
Overview
MAX6722AUTTGD2+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 8.8ms minimum reset timeout, and push-pull active-low RST output. It ensures reliable system reset during power-up, brownout, or undervoltage events in multivoltage embedded systems.
For engineers reviewing the MAX6722AUTTGD2+T datasheet, MAX6722AUTTGD2+T pinout, MAX6722AUTTGD2+T application, or MAX6722AUTTGD2+T equivalent, key selection criteria include dual-rail voltage monitoring capability, guaranteed reset validity down to VCC = 0.8V, watchdog disable support via unconnected WDI, and AEC-Q100-compatibility context for industrial reliability validation.
Technical Context
The MAX6722AUTTGD2+T integrates two independent voltage comparators with hysteresis (0.5% typical), a precision internal reference (626.5mV for RSTIN/PFI), and a programmable reset timeout timer. Its dual-supply architecture allows simultaneous monitoring of primary (VCC1) and secondary (VCC2) rails without external components.
It features a push-pull RST output referenced to VCC1, manual-reset input (MR) with 50kΩ internal pullup, and watchdog input (WDI) supporting dual-mode timing: 35s startup period followed by 1.12s normal timeout. The device operates across -40°C to +125°C and draws only 15µA typical supply current at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, ±125mV tolerance); ensures reliable reset assertion when primary supply drops below nominal 4.63V rail |
| VCC2 Reset Threshold | 3.075V (factory-trimmed, ±75mV tolerance); monitors secondary 3.3V rail with tight margin against dropout |
| Reset Timeout Period | 8.8ms (min); provides sufficient hold time for processor initialization after power stabilization |
| Supply Current | 15µA typical at 3.6V; enables long battery life in portable equipment without compromising supervision accuracy |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| Reset Output Type | Push-pull active-low RST; eliminates need for external pullup resistor and ensures fast, low-impedance reset signaling |
| Watchdog Startup Period | 35s minimum; accommodates complex boot sequences before entering normal 1.12s watchdog monitoring mode |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; asserts low during VCC1/VCC2 undervoltage, MR activation, or watchdog timeout |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output drivers |
| 3 - MR | Manual-reset input | Active-low input with 50kΩ internal pullup to VCC1; initiates reset when pulled low, holds reset for full timeout after release |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when VCC2 > VCC1; input to secondary voltage comparator (VTH2 = 3.075V) |
| 5 - VCC1 | Primary supply input | Main power source and input to primary comparator (VTH1 = 4.625V); defines RST output logic high level |
| 6 - WDI | Watchdog input | Edge-sensitive input; unconnected state disables watchdog; rising/falling edges reset internal 1.12s timer after 35s startup |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC1 (4.625V) and VCC2 (3.075V) with separate comparators and hysteresis, eliminating need for discrete supervisors |
| Guaranteed reset validity down to 0.8V | Ensures correct RST logic state even during deep brownout conditions where VCC1 or VCC2 drops to 0.8V - critical for fail-safe shutdown |
| Watchdog with dual-mode timing | 35s initial startup window prevents false resets during boot, then switches to 1.12s monitoring interval for rapid fault detection during runtime |
| Immunity to short VCC transients | Withstands negative-going glitches ≤20µs at 100mV overdrive without asserting reset - reduces spurious reboots in noisy power environments |
| Low quiescent current | 15µA typical ICC1 at 3.6V enables integration into always-on subsystems without impacting battery lifetime |
Applications
| Industrial PLC Control | Automotive Body Controller |
|---|---|
Use Scenario: Supervises dual-rail power (5V MCU core + 3.3V I/O) in programmable logic controllers exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Dual-supply voltage monitor and reset generator with guaranteed operation down to 0.8V VCC, ensuring deterministic reset during brownout recovery. Use Value: Prevents firmware corruption by holding reset until both rails stabilize above 4.625V and 3.075V respectively, with 8.8ms timeout aligned to PLC boot sequence. |
Use Scenario: Monitors battery-backed 5V domain and 3.3V CAN interface supply in vehicle body control modules operating from -40°C to +125°C. IC Role / Device Role / Timing Role: AEC-Q100-aligned supervisory IC providing fail-safe reset assertion during cold-crank or load-dump events. Use Value: Push-pull RST output drives microcontroller reset pin directly without pullup; 35s watchdog startup avoids false triggers during engine start-up transient. |
| Network Router Power Management | Medical Diagnostic Handheld |
Use Scenario: Ensures clean boot of dual-core SoC (1.2V core + 3.3V PHY) in enterprise routers with redundant DC-DC supplies. IC Role / Device Role / Timing Role: Dual-threshold supervisor with manual reset (MR) for field service recovery and watchdog (WDI) for software hang detection. Use Value: MR input supports hardware-initiated reboot via front-panel button; WDI edge sensitivity detects stalled firmware without requiring dedicated GPIO toggling. |
Use Scenario: Guarantees safe power-on reset for ARM-based diagnostic handheld running from single-cell Li-ion (3.0–4.2V) with regulated 3.3V and 1.8V rails. IC Role / Device Role / Timing Role: Ultra-low-current (15µA) supervisor enabling multi-week standby while maintaining precise 4.625V/3.075V threshold detection. Use Value: 8.8ms reset timeout matches bootloader execution window; low ICC extends battery life without sacrificing supervision fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTTGD2+T | Open-drain RST output instead of push-pull; requires external pullup resistor | Suitable for bidirectional reset interfaces or level-shifting scenarios where active-high reset is needed | Select when interfacing with μPs requiring open-drain reset or when sharing reset bus with other devices |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no VCC2 input or dual-threshold capability | Limited to single-rail systems; lacks manual reset, watchdog, and auxiliary monitoring inputs | Choose only for cost-sensitive, single-voltage applications where dual-rail supervision is unnecessary |
Compared with MAX6720AUTTGD2+T and TPS3808G33DBVR, the MAX6722AUTTGD2+T uniquely delivers dual-rail monitoring with push-pull reset, integrated watchdog, and MR functionality in one SOT23-6 package - making it optimal for space-constrained multivoltage systems requiring robust, self-contained supervision.
Availability
MAX6722AUTTGD2+T is available at Aetrix Electronics and suitable for industrial PLC control, automotive body electronics, network infrastructure, medical handheld diagnostics, and telecom base station power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6722AUTTGD2+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 high-performance analog and mixed-signal ICs for power, sensing, connectivity, and security applications in industrial, automotive, and communications markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, dual/triple-supply supervisory circuits optimized for reliability-critical embedded systems where precise voltage monitoring, guaranteed reset behavior, and compact packaging are essential.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6722AUTTGD2+T?
The MAX6722AUTTGD2+T has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with a tolerance of ±125mV (4.500V to 4.750V). This value is fixed per the "GD" suffix in the part number and is specified in the Electrical Characteristics table under VTH1 (L suffix = 4.625V). The threshold remains stable across temperature with a tempco of 20ppm/°C.
Does the MAX6722AUTTGD2+T support monitoring a third voltage rail?
No, the MAX6722AUTTGD2+T does not support third-rail monitoring. It is a dual-supply supervisor with dedicated VCC1 and VCC2 inputs only. Models like MAX6723A–MAX6727A include RSTIN for adjustable third-rail monitoring, but MAX6722AUTTGD2+T omits this pin and functionality per its pinout and datasheet configuration.
What is the function of Pin 6 (WDI) on the MAX6722AUTTGD2+T, and how is it disabled?
Pin 6 is the Watchdog Input (WDI). It monitors microprocessor activity and triggers a reset if no edge transition occurs within 1.12s (after initial 35s startup). To disable the watchdog, leave WDI unconnected - the internal 200nA current source detects the floating state and disables timing. Do not tie WDI to any node sourcing >50nA.
Is the MAX6722AUTTGD2+T AEC-Q100 qualified?
The MAX6722AUTTGD2+T itself is not explicitly AEC-Q100 qualified per the datasheet; however, the related MAX6719AUTTWD1/V+T variant is listed as AEC-Q100 qualified. The MAX6722AUTTGD2+T shares the same SOT23-6 package, -40°C to +125°C operating range, and process technology, but qualification status must be verified per individual part number with Maxim/Analog Devices documentation.
What is the reset timeout period for the MAX6722AUTTGD2+T, and how is it set?
The MAX6722AUTTGD2+T has a fixed minimum reset timeout period of 8.8ms, indicated by the "D2" suffix in the part number. This value is factory-programmed and non-adjustable. The timeout begins when VCC1 or VCC2 falls below its respective threshold and continues for ≥8.8ms after both supplies rise above their thresholds, ensuring sufficient hold time for processor initialization.
MAX6722AUTTGD2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.11V, 3.075V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 8.8ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6722AUTTGD2+T FAQ
1.How can I place an order for MAX6722AUTTGD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6722AUTTGD2+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 MAX6722AUTTGD2+T reliable?
The price and inventory of MAX6722AUTTGD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6722AUTTGD2+T is usually 5 days.
3.What payment methods are accepted for MAX6722AUTTGD2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6722AUTTGD2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6722AUTTGD2+T?
MAX6722AUTTGD2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6722AUTTGD2+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 MAX6722AUTTGD2+T?
For technical support, including MAX6722AUTTGD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6722AUTTGD2+T requirements.
6.How does Aetrix verify that MAX6722AUTTGD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6722AUTTGD2+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 MAX6722AUTTGD2+T meets industry standards.
7.What is the process for return or replacement of MAX6722AUTTGD2+T?
All MAX6722AUTTGD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6722AUTTGD2+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 MAX6722AUTTGD2+T part is unused and in its original packaging.
Return procedure for MAX6722AUTTGD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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