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Analog Devices Inc./Maxim Integrated MAX6719AUTTWD3+
- Part No.:
- MAX6719AUTTWD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6719AUTTWD3+.pdf
- Description:
- MAX6719AUTTWD3+
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Product details
Overview
MAX6719AUTTWD3+ from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory IC monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V), with externally adjustable RSTIN threshold (626mV reference), 140ms minimum reset timeout, and push-pull active-low RST output. It guarantees valid reset logic down to VCC1 or VCC2 = 0.8V and operates across –40°C to +125°C for industrial power-rail monitoring in multivoltage embedded systems.
For engineers reviewing the MAX6719AUTTWD3+ datasheet, MAX6719AUTTWD3+ pinout, MAX6719AUTTWD3+ application, or MAX6719AUTTWD3+ equivalent, key selection considerations include its factory-trimmed dual-threshold architecture, 140ms reset timeout (D3 suffix), RSTIN-adjustable third-voltage monitoring capability, watchdog disable-by-open WDI, and SOT23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6719AUTTWD3+ integrates two independent voltage comparators with hysteresis (0.5% of VTH), a reset timeout timer (140ms min), and an adjustable RSTIN input referenced to a 626mV internal bandgap. Its reset assertion logic combines VCC1/VCC2 undervoltage detection, manual-reset (MR) pull-down, and optional watchdog timeout - all coordinated through a single reset state machine.
It supports push-pull RST output referenced to VCC1, with guaranteed VOL ≤ 0.3V at ISINK = 500µA (VCC ≥ 1.8V), and features immunity to sub-20µs VCC transients when overdrive exceeds 100mV. The device draws only 10µA typical supply current at 3.6V, enabling use in battery-operated equipment requiring long-term supervision without significant quiescent load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout Period | 140ms (min) - ensures sufficient hold time for full μP initialization after power-up or brownout recovery |
| VCC1 Reset Threshold | 2.925V (typ) - factory-trimmed for 3.0V nominal supply monitoring with ±1.25% tolerance |
| VCC2 Reset Threshold | 1.110V (typ) - factory-trimmed for 1.2V core rail supervision with ±1.25% tolerance |
| RSTIN Threshold Voltage | 626.5mV (typ) - internal reference enabling precise external resistor-divider setup for third-voltage monitoring down to 0.62V |
| Supply Current (ICC) | 10µA (typ at 3.6V) - ultra-low quiescent draw suitable for always-on supervision in portable/battery systems |
| 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; VOH ≥ 0.8×VCC1, VOL ≤ 0.3V at 500µA sink |
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 referenced to VCC1; asserts when VCC1/VCC2/RSTIN fall below thresholds or MR pulled low |
| 2 | GND | System 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 required for reliable assertion |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal circuitry when > VCC1 and sets VCC2 comparator reference |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers device when > VCC2 and sets primary reset threshold and RST output reference |
| 6 | RSTIN | Adjustable undervoltage monitor input; high-impedance node referenced to 626.5mV internal bandgap for third-rail monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneous monitoring of VCC1 (1.8–5.0V) and VCC2 (0.9–3.3V) with separate factory-trimmed thresholds avoids cascaded failure propagation |
| Externally adjustable RSTIN input | 626.5mV internal reference enables precise third-rail monitoring (e.g., 1.0V, 1.8V, 2.5V) using standard resistor dividers without external references |
| 140ms minimum reset timeout | Guaranteed deassertion hold time prevents premature μP release during slow-ramping supplies or cold-start conditions |
| Push-pull RST output | Eliminates external pullup resistor, reduces BOM count, and ensures clean logic levels across full VCC1 operating range (0.8–5.5V) |
| Valid reset operation down to 0.8V | Enables supervision of deeply brownout-prone rails (e.g., Li-ion battery discharge) while maintaining deterministic reset state |
Applications
| Industrial PLC Power Management | Automotive ADAS Camera Module |
|---|---|
Use Scenario: Supervises dual-rail power (5V system + 1.2V FPGA core) in programmable logic controllers exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset on either rail collapse, with 140ms timeout ensuring FPGA configuration stability before boot. Use Value: Prevents lockup from partial rail failure; push-pull RST eliminates pullup resistor drift concerns in high-temp enclosures. |
Use Scenario: Monitors 3.3V image sensor supply and 1.1V ISP core voltage in automotive surround-view cameras operating at –40°C to +105°C. IC Role / Device Role / Timing Role: Primary/secondary voltage supervisor with RSTIN used to track auxiliary 1.8V I/O rail, guaranteeing reset validity even during cold cranking dips. Use Value: Factory-trimmed thresholds eliminate calibration overhead; 0.8V reset validity supports operation during battery sag events. |
| Medical Infusion Pump Controller | 5G Small Cell Baseband Unit |
Use Scenario: Ensures safe shutdown and restart of motor control MCU and analog front-end in battery-powered infusion pumps with strict safety-critical timing. IC Role / Device Role / Timing Role: Dual-supply supervisor with MR input for emergency reset and RSTIN for battery voltage monitoring, coordinating fail-safe sequencing. Use Value: 140ms timeout aligns with pump motor coast-down time; ultra-low 10µA ICC extends battery life between calibrations. |
Use Scenario: Supervises 12V DC-DC converted rails (5V, 3.3V, 1.0V) in compact 5G small cell units where layout area and thermal dissipation are constrained. IC Role / Device Role / Timing Role: Compact SOT23-6 dual supervisor replacing discrete solutions; RSTIN monitors critical 1.0V LDO output for early fault detection. Use Value: Reduces component count by 60% vs. discrete comparators + timer; 115°C/W θJA enables placement near hot FPGAs without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTTWD3+ | Identical pinout, same D3 timeout, but VCC1/VCC2 thresholds differ (VTH1 = 2.625V typ, VTH2 = 0.833V typ); no RSTIN pin - fixed dual-monitor only | Lacks RSTIN adjustability; suitable only for systems requiring only two-rail supervision without auxiliary voltage tracking | Select when third-rail monitoring is unnecessary and tighter VCC2 threshold (0.83V) better matches 0.9V LDO tolerance |
| TPS3808G33DBVR | Single-supply (VDD only), 3.3V fixed threshold, 200ms timeout, open-drain RST; no VCC2 or RSTIN inputs; 1.8–6.5V VDD range | Cannot supervise dual rails or third voltages; requires external pullup; lacks manual reset and watchdog disable | Choose only for simple single-rail systems where cost and footprint are prioritized over multi-rail flexibility |
Compared with MAX6720AUTTWD3+, the MAX6719AUTTWD3+ adds RSTIN for third-rail adaptability at identical timeout and package; versus TPS3808G33DBVR, it provides true dual-rail supervision, push-pull output, and manual reset - making it essential for complex multivoltage systems where reliability and design margin outweigh minimal BOM cost.
Availability
MAX6719AUTTWD3+ is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6719AUTTWD3+ 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 family delivers ultra-low-voltage dual/triple supervisory functions in miniature SOT23 packages, targeting space- and power-constrained embedded systems needing robust power-rail monitoring and fail-safe reset coordination.
FAQ
What is the reset timeout period for MAX6719AUTTWD3+?
The MAX6719AUTTWD3+ has a guaranteed minimum reset timeout period of 140ms (D3 suffix). This ensures the reset signal remains asserted long enough for microprocessors and FPGAs to complete full initialization after power-up or brownout recovery, preventing premature execution of unstable firmware.
Does MAX6719AUTTWD3+ support monitoring a third voltage rail?
Yes, MAX6719AUTTWD3+ supports third-rail monitoring via its RSTIN pin, which features a precise 626.5mV internal reference. By connecting an external resistor divider, designers can configure custom reset thresholds for auxiliary supplies such as 1.0V, 1.8V, or 2.5V rails without adding external components.
What is the operating voltage range for VCC1 and VCC2 on MAX6719AUTTWD3+?
MAX6719AUTTWD3+ supports VCC1 from 0.8V to 5.5V and VCC2 from 0.8V to 5.5V. Its dual-supply architecture allows independent monitoring of primary (e.g., 3.3V) and secondary (e.g., 1.2V) rails, with guaranteed reset validity even when either supply drops to 0.8V - critical for battery-discharge scenarios.
Is the RST output of MAX6719AUTTWD3+ push-pull or open-drain?
The RST output of MAX6719AUTTWD3+ is push-pull active-low, eliminating the need for an external pullup resistor. It delivers VOH ≥ 0.8×VCC1 and VOL ≤ 0.3V at 500µA sink, ensuring robust logic levels across its full 0.8V–5.5V VCC1 operating range - simplifying layout and improving noise immunity.
How does the manual reset (MR) input function on MAX6719AUTTWD3+?
The MR input on MAX6719AUTTWD3+ is active-low with a 50kΩ internal pullup to VCC1. Pulling MR low forces an immediate reset assertion, which remains active for the full 140ms timeout after MR returns high. It accepts CMOS-level signals and requires only a 1µs minimum pulse width, supporting both hardware buttons and software-controlled reset initiation.
MAX6719AUTTWD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6719AUTTWD3+ FAQ
1.How can I place an order for MAX6719AUTTWD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTTWD3+ 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 MAX6719AUTTWD3+ reliable?
The price and inventory of MAX6719AUTTWD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTTWD3+ is usually 5 days.
3.What payment methods are accepted for MAX6719AUTTWD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTTWD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTTWD3+?
MAX6719AUTTWD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTTWD3+ 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 MAX6719AUTTWD3+?
For technical support, including MAX6719AUTTWD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTTWD3+ requirements.
6.How does Aetrix verify that MAX6719AUTTWD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTTWD3+ 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 MAX6719AUTTWD3+ meets industry standards.
7.What is the process for return or replacement of MAX6719AUTTWD3+?
All MAX6719AUTTWD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTTWD3+, 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 MAX6719AUTTWD3+ part is unused and in its original packaging.
Return procedure for MAX6719AUTTWD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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