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Analog Devices Inc./Maxim Integrated MAX6719AUTZWD1+T
- Part No.:
- MAX6719AUTZWD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTZWD1+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,072
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Product details
Overview
MAX6719AUTZWD1+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 1.1ms minimum reset timeout, and integrated watchdog timer (35s startup / 1.12s normal mode). It asserts active-low push-pull RST when either supply drops below threshold and maintains reset for the full timeout period - used in telecom power management and battery-operated embedded systems.
For engineers reviewing the MAX6719AUTZWD1+T datasheet, MAX6719AUTZWD1+T pinout, MAX6719AUTZWD1+T application, or MAX6719AUTZWD1+T equivalent, key selection criteria include dual-supply voltage monitoring range (VCC1/VCC2), guaranteed reset validity down to 0.8V, low 14µA typical supply current at 3.6V, watchdog disable capability via open WDI, and AEC-Q100 qualification relevance for automotive-grade designs.
Technical Context
The MAX6719AUTZWD1+T implements independent dual-voltage comparators with internal 0.8V reference for reset assertion logic, coupled to a programmable reset timeout timer and a dual-mode watchdog (35s initial boot window + 1.12s runtime timeout). Its RST output is push-pull referenced to VCC1, and it includes MR input with 50kΩ internal pullup and glitch rejection of 100ns.
It supports externally adjustable third-voltage monitoring via RSTIN (626.5mV internal reference), enabling auxiliary rail supervision down to 0.62V using resistor dividers. The device operates across –40°C to +125°C and guarantees valid reset state as long as VCC1 or VCC2 ≥ 0.8V - critical for brownout resilience in industrial and automotive power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCC1 = 0.8V to 5.5V; VCC2 = 0.8V to 5.5V - ensures operation during deep brownout and compatibility with 1.2V/1.8V/3.3V/5V system rails. |
| Reset Threshold Accuracy | VTH1 = 4.625V (typ), VTH2 = 3.075V (typ) - factory-trimmed for ±1.5% tolerance, eliminating external calibration in precision power sequencing. |
| Reset Timeout Period | 1.1ms (min) - fixed D1 suffix timing enables fast recovery after transient dips without compromising system stability. |
| Watchdog Timeout | 35s (min) startup + 1.12s (min) normal mode - accommodates lengthy firmware initialization while providing rapid fault detection during runtime. |
| Supply Current | 14µA (typ) at 3.6V - ultra-low quiescent current extends battery life in portable equipment and always-on subsystems. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and telecom infrastructure environments. |
| Reset Output Type | Push-pull active-low RST referenced to VCC1 - eliminates need for external pullup and ensures clean, rail-to-rail reset signaling. |
Pinout & Package
SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 115°C/W (multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Asserted low when VCC1/VCC2 drop below threshold or MR pulled low; remains low for full 1.1ms timeout; referenced to VCC1. |
| 2 - GND | Ground reference | Common return path for all internal comparators, timers, and output drivers; must be low-impedance connection. |
| 3 - MR | Active-low manual-reset input | Pulled high internally by 50kΩ to VCC1; 1µs minimum pulse width required; provides hardware-initiated reset independent of supply status. |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when VCC2 > VCC1; monitored for secondary reset threshold (0.9V–3.3V range); defines RST2 reference if present. |
| 5 - VCC1 | Primary supply input | Main power source and primary reset monitor (1.8V–5.0V range); supplies RST output driver and internal logic; determines VOH level. |
| 6 - WDI | Watchdog input | Unconnected = watchdog disabled; rising/falling edge resets 1.12s watchdog timer; 200nA unconnected-state detector prevents false triggers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | Simultaneous VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) supervision with separate thresholds - enables reliable power sequencing in multirail SoC/FPGA systems. |
| Guaranteed reset validity down to 0.8V | Ensures correct RST logic state even during severe brownout - critical for fail-safe shutdown in automotive and industrial applications. |
| Watchdog with long startup + short runtime timeout | 35s minimum initial window allows full bootloader execution; 1.12s runtime timeout detects software hangs without requiring complex firmware coordination. |
| Low 14µA supply current (typ) | Minimizes standby power draw in battery-backed or energy-harvesting systems - supports >10-year shelf life in IoT sensor nodes. |
| Immunity to short VCC transients | Withstands ≤20µs negative glitches at 100mV overdrive - eliminates spurious resets caused by switching noise or ESD events. |
Applications
| Telecom Power Sequencing | Automotive Infotainment |
|---|---|
Use Scenario: Monitoring primary 3.3V I/O rail and secondary 1.2V core rail in base station FPGA modules during cold start and hot-swap events. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset to FPGA and associated SerDes PHYs within 1.1ms of undervoltage detection. Use Value: Prevents metastability and configuration corruption by enforcing strict power-rail ordering and hold-time compliance per Xilinx/Intel FPGA specs. |
Use Scenario: Supervising 5V MCU supply and 3.3V display controller rail in head-unit systems exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: AEC-Q100-qualified supervisor delivering guaranteed reset assertion at VCC1 ≥ 0.8V and supporting watchdog-triggered safe state entry. Use Value: Enables ISO 26262 ASIL-B compliant fail-safe behavior by maintaining deterministic reset state during battery voltage collapse. |
| Industrial PLC I/O Modules | Portable Medical Devices |
Use Scenario: Ensuring clean startup of ARM Cortex-M7-based controller and isolated analog front-end in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Dual-rail supervisor with MR input enabling field-service reset and watchdog guarding main application loop. Use Value: Eliminates need for discrete RC reset circuits and reduces BOM count while meeting IEC 61000-4-2/4-4 immunity requirements. |
Use Scenario: Managing power-up sequence of 1.8V BLE SoC and 3.0V sensor interface in handheld glucose meters with coin-cell battery. IC Role / Device Role / Timing Role: Ultra-low-current (14µA typ) supervisor extending battery life while ensuring reliable reset during low-battery brownout. Use Value: Achieves >2-year operational lifetime on CR2032 cell without compromising safety-critical reset integrity per IEC 62304. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTZWD1+T | Same SOT23-6 package and pinout; identical VCC1/VCC2 monitoring ranges but uses D2 timeout (8.8ms min) instead of D1 (1.1ms min). | Preferred where longer reset hold time is needed to accommodate slower power supplies or legacy µP reset timing requirements. | Select MAX6720AUTZWD1+T only if system design requires ≥8ms reset assertion - not a drop-in replacement due to timeout mismatch. |
| TPS3808G33DBVR | Single-supply (VDD only), no VCC2 input; fixed 3.3V threshold; 200ms timeout; no watchdog; SOT23-6 package. | Limited to single-rail systems; lacks dual-monitoring, adjustable timeout, and watchdog - suitable only for basic reset needs. | Choose TPS3808G33DBVR only for cost-sensitive, single-voltage applications where dual monitoring and watchdog are unnecessary. |
Compared with MAX6720AUTZWD1+T and TPS3808G33DBVR, the MAX6719AUTZWD1+T uniquely delivers 1.1ms reset timeout, dual-supply monitoring with independent thresholds, and integrated dual-mode watchdog - making it the only option for compact, high-reliability multivoltage systems requiring fast, intelligent reset control.
Availability
MAX6719AUTZWD1+T is available at Aetrix Electronics and suitable for telecom infrastructure, automotive infotainment, and industrial PLC applications requiring stable component supply, extended temperature operation, and AEC-Q100-compliant reliability.
Supply support for MAX6719AUTZWD1+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 and mixed-signal ICs for demanding industrial, automotive, and communications applications - emphasizing reliability, low power, and integration.
The MAX6715A–MAX6729A/MAX6797A family was developed specifically for multivoltage microprocessor supervision in space-constrained, high-temperature environments - targeting systems where simultaneous VCC1/VCC2 monitoring, watchdog safety, and guaranteed sub-1V reset validity are mandatory.
FAQ
What is the reset timeout period for MAX6719AUTZWD1+T?
The MAX6719AUTZWD1+T has a fixed minimum reset timeout period of 1.1ms (D1 suffix), guaranteed across –40°C to +125°C. This value is factory-trimmed and does not require external components. The timeout begins when VCC1 or VCC2 falls below its respective threshold and ends after the full period elapses - even if supply voltages recover earlier. This timing is integral to the MAX6719AUTZWD1+T's function as a deterministic power supervisor.
Does MAX6719AUTZWD1+T support monitoring a third voltage rail?
Yes, the MAX6719AUTZWD1+T includes an RSTIN pin with a 626.5mV internal reference, enabling external resistor-divider-based monitoring of a third supply down to 0.62V. When the divided voltage at RSTIN falls below this threshold, the device asserts RST. This feature is confirmed in the MAX6719AUTZWD1+T datasheet Pin Description table and Electrical Characteristics section - making the MAX6719AUTZWD1+T a true triple-voltage supervisor despite its dual-input labeling.
Is MAX6719AUTZWD1+T AEC-Q100 qualified?
No - the MAX6719AUTZWD1+T is not AEC-Q100 qualified. Only the MAX6719AUTTWD1/V+T variant (note "AEC-Q100 Qualified" in Features section) carries that qualification. The MAX6719AUTZWD1+T shares the same silicon and SOT23-6 package but is screened and tested to commercial/industrial specifications only. Engineers requiring automotive qualification must specify the /V+T suffix version, not the /ZWD1+T variant.
What is the function of the WDI pin on MAX6719AUTZWD1+T?
The WDI (Watchdog Input) pin on MAX6719AUTZWD1+T monitors microprocessor activity: if WDI remains static (high or low) beyond 1.12s (normal mode) or 35s (startup mode), the device asserts RST for the full 1.1ms timeout. Leaving WDI unconnected disables the watchdog - verified by the internal 200nA current source detecting open-circuit state. This behavior is explicitly defined in the MAX6719AUTZWD1+T Pin Description and Detailed Description sections.
Can MAX6719AUTZWD1+T operate with VCC1 = 1.8V and VCC2 = 1.2V?
Yes - the MAX6719AUTZWD1+T is fully specified to operate with VCC1 as low as 0.8V and VCC2 as low as 0.8V, and both rails are independently monitored across their full ranges (VCC1: 1.8V–5.0V; VCC2: 0.9V–3.3V). At VCC1 = 1.8V and VCC2 = 1.2V, the device maintains guaranteed reset output logic state, draws ≤28µA total supply current (ICC1 + ICC2), and asserts RST within 20µs of threshold violation - all confirmed in the Electrical Characteristics table of the MAX6719AUTZWD1+T datasheet.
MAX6719AUTZWD1+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:
- 1.665V, 2.313V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719AUTZWD1+T FAQ
1.How can I place an order for MAX6719AUTZWD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTZWD1+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 MAX6719AUTZWD1+T reliable?
The price and inventory of MAX6719AUTZWD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTZWD1+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTZWD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTZWD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTZWD1+T?
MAX6719AUTZWD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTZWD1+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 MAX6719AUTZWD1+T?
For technical support, including MAX6719AUTZWD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTZWD1+T requirements.
6.How does Aetrix verify that MAX6719AUTZWD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTZWD1+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 MAX6719AUTZWD1+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTZWD1+T?
All MAX6719AUTZWD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTZWD1+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 MAX6719AUTZWD1+T part is unused and in its original packaging.
Return procedure for MAX6719AUTZWD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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