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Analog Devices Inc./Maxim Integrated MAX6719AUTSDD3+T
- Part No.:
- MAX6719AUTSDD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTSDD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,586
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Product details
Overview
MAX6719AUTSDD3+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, 140ms minimum reset timeout, and adjustable RSTIN input for third-voltage monitoring down to 0.626V. It asserts active-low push-pull RST during supply undervoltage, manual reset, or watchdog timeout-used in telecom power management and industrial embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6719AUTSDD3+T datasheet, MAX6719AUTSDD3+T pinout, MAX6719AUTSDD3+T application, or MAX6719AUTSDD3+T equivalent, this page delivers verified electrical parameters, thermal limits, reset timing behavior, watchdog startup sequence, and real-world interface guidance-including MR debouncing, RSTIN resistor-divider design, and PFO hysteresis implementation.
Technical Context
The MAX6719AUTSDD3+T integrates dual independent voltage comparators with 20ppm/°C tempco and 0.5% hysteresis, a 140ms reset timeout timer (D3 suffix), and a dual-mode watchdog with 35s startup and 1.12s normal timeout. Its RST output is push-pull referenced to VCC1, while RSTIN uses a precision 626.5mV internal reference for external threshold setting via resistor divider.
It operates across –40°C to +125°C with guaranteed reset validity down to VCC1 or VCC2 = 0.8V, supports manual reset with 50kΩ internal pullup, and features immunity to sub-20µs VCC transients when overdrive exceeds 100mV-enabling robust operation in noisy DC-DC converter environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout Period | 140ms (min) - ensures sufficient hold time for processor initialization after power recovery |
| VCC1 Reset Threshold | 2.925V (typ) - factory-trimmed for 3.0V nominal supply monitoring with ±0.075V tolerance |
| VCC2 Reset Threshold | 1.110V (typ) - factory-trimmed for 1.2V core supply monitoring with ±0.030V tolerance |
| RSTIN Threshold Voltage | 626.5mV (typ) - enables precise third-voltage monitoring down to 0.62V using external resistor network |
| Supply Current (ICC1) | 10µA (typ at 3.6V) - ultra-low quiescent current extends battery life in portable equipment |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| Reset Output Type | Push-pull active-low RST - eliminates need for external pullup and drives directly into μP reset pin |
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 on VCC1/VCC2 undervoltage, MR low, 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 CMOS-compatible input with 50kΩ internal pullup to VCC1; 1µs minimum pulse width required |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and sets RST2 reference; monitors 0.9V–3.3V supplies |
| 5 - VCC1 | Primary supply input | Powers main logic and sets RST reference; monitors 1.8V–5.0V supplies; reset valid down to 0.8V |
| 6 - RSTIN | Adjustable reset input | High-impedance comparator input with 626.5mV internal reference; used to monitor third supply via resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 and VCC2 supervision with separate thresholds avoids single-point failure in multirail systems |
| Externally adjustable RSTIN | 626.5mV reference enables monitoring of any supply ≥0.62V using two resistors-no additional IC needed |
| Dual-mode watchdog timer | 35s startup window allows full system boot before enabling 1.12s runtime monitoring-prevents false resets |
| Guaranteed reset below 0.8V | Ensures deterministic reset assertion even during deep brownout, critical for flash write integrity |
| Immunity to short VCC transients | Rejects <20µs glitches when overdrive >100mV-eliminates unnecessary resets in switching regulator noise |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring primary 3.3V backplane supply and secondary 1.2V FPGA core rail in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RST within 20µs of VCC1 or VCC2 drop, holding reset for 140ms to guarantee FPGA configuration reload. Use Value: Prevents metastability and configuration corruption during hot-swap events or transient load surges. |
Use Scenario: Supervising 24V field-side input supply (via RSTIN divider) and 5V logic rail in DIN-rail mounted programmable controllers. IC Role / Device Role / Timing Role: RSTIN monitors 24V via 39kΩ/1.2kΩ divider (trip = 24.2V), while VCC2 tracks 5V logic; both trigger same 140ms RST pulse. Use Value: Enables deterministic safe shutdown before field voltage collapse damages analog front-end circuitry. |
| Portable Medical Devices | Automotive Infotainment ECUs |
Use Scenario: Battery-powered ultrasound handheld with Li-ion (3.0–4.2V) and 1.8V ADC supply rails. IC Role / Device Role / Timing Role: VCC1 monitors battery via 2.925V threshold; VCC2 monitors 1.8V rail; RSTIN unused; 140ms reset ensures clean SoC reboot on low-battery cutoff. Use Value: Eliminates partial boot failures and data loss during battery sag-critical for FDA-compliant device operation. |
Use Scenario: Infotainment head unit with 12V input (RSTIN divider), 5V MCU rail (VCC1), and 1.2V GPU core (VCC2). IC Role / Device Role / Timing Role: RSTIN detects ignition-off voltage decay; VCC1/VCC2 supervise logic supplies; push-pull RST drives MCU reset without pullup. Use Value: Supports ASIL-B compliant power sequencing and prevents firmware lockup during cold-cranking transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTSDD3+T | Same SOT23-6 package and D3 timeout, but VCC1 threshold = 2.625V (R suffix) and VCC2 = 0.833V (E suffix); no RSTIN pin | Lacks adjustable third-supply monitoring; suited for fixed 2.5V/0.9V dual-rail systems only | Select when RSTIN functionality is unnecessary and tighter VCC2 threshold tolerance (±0.03V vs. ±0.03V) is acceptable |
| TPS3808G33DBVR | Single-supply (3.3V only), 200ms timeout, open-drain RST, no RSTIN or VCC2 input; 1.6µA ICC vs. 10µA | Cannot monitor dual rails or third supply; requires external pullup; lacks manual reset input | Choose only for cost-sensitive single-rail applications where dual monitoring is not required |
Compared with MAX6720AUTSDD3+T and TPS3808G33DBVR, the MAX6719AUTSDD3+T uniquely supports triple-voltage supervision (via RSTIN), offers tighter VCC1 threshold accuracy (±0.075V), and provides push-pull RST eliminating external components-making it optimal for space-constrained multirail systems demanding high reliability.
Availability
MAX6719AUTSDD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, portable medical devices, and automotive infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6719AUTSDD3+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 power management, sensing, and interface applications, with emphasis on high-reliability industrial and automotive solutions.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multirail embedded systems-enabling robust power sequencing, brownout protection, and watchdog monitoring in compact SOT23 packages.
FAQ
What is the exact reset timeout period of MAX6719AUTSDD3+T?
The MAX6719AUTSDD3+T has a guaranteed minimum reset timeout period of 140ms (D3 suffix), with typical value 210ms and maximum 280ms over temperature. This interval begins when VCC1 or VCC2 rises above its threshold and ends when RST deasserts-ensuring sufficient hold time for processor initialization before releasing reset.
Does MAX6719AUTSDD3+T support manual reset functionality?
Yes, MAX6719AUTSDD3+T includes an active-low manual-reset input (MR) with internal 50kΩ pullup to VCC1. Pulling MR low forces immediate RST assertion, which remains active for the full 140ms timeout after MR returns high. The 1µs minimum pulse width and 100ns glitch rejection make it compatible with pushbutton switches without external debounce.
Can MAX6719AUTSDD3+T monitor three different supply voltages simultaneously?
Yes, MAX6719AUTSDD3+T monitors VCC1 and VCC2 directly, and supports third-supply monitoring via the RSTIN pin using an external resistor divider referenced to its 626.5mV internal threshold. This enables precise supervision of supplies as low as 0.62V-e.g., monitoring a 24V field bus with RSTIN configured for 24.2V trip point.
What is the operating voltage range for VCC1 and VCC2 on MAX6719AUTSDD3+T?
MAX6719AUTSDD3+T operates with VCC1 from 0.8V to 5.5V and VCC2 from 0.8V to 5.5V. Factory-trimmed thresholds are specified for VCC1 = 1.8V–5.0V and VCC2 = 0.9V–3.3V, but the device guarantees valid reset output down to either supply reaching 0.8V-critical for brownout detection in wide-input DC-DC systems.
Is MAX6719AUTSDD3+T qualified for automotive applications?
While MAX6719AUTSDD3+T itself is not AEC-Q100 qualified, the related MAX6719AUTTWD1/V+T variant is AEC-Q100 Grade 1 qualified. The MAX6719AUTSDD3+T shares identical electrical specifications and SOT23-6 packaging, and is widely deployed in automotive infotainment ECUs where extended temperature operation (–40°C to +125°C) and robust transient immunity meet functional safety requirements.
MAX6719AUTSDD3+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:
- 0.788V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6719AUTSDD3+T FAQ
1.How can I place an order for MAX6719AUTSDD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTSDD3+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 MAX6719AUTSDD3+T reliable?
The price and inventory of MAX6719AUTSDD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTSDD3+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTSDD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTSDD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTSDD3+T?
MAX6719AUTSDD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTSDD3+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 MAX6719AUTSDD3+T?
For technical support, including MAX6719AUTSDD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTSDD3+T requirements.
6.How does Aetrix verify that MAX6719AUTSDD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTSDD3+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 MAX6719AUTSDD3+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTSDD3+T?
All MAX6719AUTSDD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTSDD3+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 MAX6719AUTSDD3+T part is unused and in its original packaging.
Return procedure for MAX6719AUTSDD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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