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Analog Devices Inc./Maxim Integrated MAX6719AUTSHD3+T
- Part No.:
- MAX6719AUTSHD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719AUTSHD3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6719AUTSHD3+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 guarantees valid reset output with either supply ≥0.8V and supports push-pull or open-drain active-low RST/RST2 outputs - used in telecom power management and industrial multivoltage systems.
For engineers reviewing the MAX6719AUTSHD3+T datasheet, MAX6719AUTSHD3+T pinout, MAX6719AUTSHD3+T application, or MAX6719AUTSHD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% typical), watchdog disable capability via unconnected WDI, immunity to sub-20µs VCC transients, and guaranteed operation over –40°C to +125°C for automotive-grade embedded control.
Technical Context
The MAX6719AUTSHD3+T implements independent voltage comparators for VCC1 and VCC2, each referenced to precision internal bandgap references, with 0.5% hysteresis and 20ppm/°C tempco. Its reset logic asserts RST/RST2 low when either supply falls below its trimmed threshold or RSTIN drops below 626.5mV, holding reset for a fixed 140ms (min) after all monitored voltages recover.
It integrates a dual-mode watchdog timer: 35s (min) startup period after reset, followed by 1.12s (min) normal timeout on WDI edge transitions. The manual-reset input (MR) features a 50kΩ internal pullup to VCC1 and 200ns MR-to-RST delay, while RSTIN and PFI share identical 626.5mV reference and ±100nA input leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (typ), factory-trimmed 'H' suffix - ensures reliable reset assertion before 4.5V core supply brownout. |
| VCC2 Reset Threshold | 3.075V (typ), factory-trimmed 'T' suffix - matches common 3.3V I/O rail tolerance for coordinated system reset. |
| Reset Timeout Period | 140ms (min), 'D3' suffix - provides sufficient hold time for FPGA configuration or boot ROM initialization. |
| RSTIN Threshold Voltage | 626.5mV (typ), internally referenced - enables precise third-voltage monitoring (e.g., 1.2V core) using external resistor divider. |
| Supply Current | 14µA (typ) at 3.6V - minimizes quiescent load on battery-backed or energy-constrained rails. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
| Reset Output Type | Push-pull active-low RST and RST2 - eliminates need for external pullup resistors in space-constrained designs. |
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 reset output | Push-pull, referenced to VCC1; asserts low on VCC1/VCC2/RSTIN fault or MR low; holds for 140ms after recovery. |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and output drivers; must be low-impedance connection. |
| 3 - MR | Active-low manual-reset input | Internally pulled up to VCC1 (50kΩ); 1µs minimum pulse width; resets system on logic-low assertion. |
| 4 - VCC2 | Secondary supply input | Powers internal VCC2 comparator and RST2 driver; monitors 0.9V–3.3V rails; sets RST2 output reference. |
| 5 - VCC1 | Primary supply input | Powers core logic, VCC1 comparator, RST driver, and watchdog; accepts 1.8V–5.0V; defines RST output reference. |
| 6 - RSTIN | Adjustable reset comparator input | High-impedance (±100nA), 626.5mV threshold; monitors third voltage (e.g., 1.2V core) via external resistor divider. |
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 and hysteresis - eliminates need for two discrete supervisors. |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV internal reference enables precise monitoring of auxiliary rails (e.g., 1.2V, 1.8V) using only two external resistors - reduces BOM count and layout area. |
| Dual-mode watchdog timer | 35s startup window allows full system boot before watchdog enforcement; 1.12s normal timeout detects software hangs without requiring complex firmware coordination. |
| Guaranteed reset validity down to 0.8V | Ensures correct RST/RST2 logic state even during deep brownout - critical for fail-safe shutdown in automotive and industrial applications. |
| Immunity to short VCC transients | Withstands ≤20µs negative-going glitches (per 75mV overdrive), preventing spurious resets in noisy power environments without added filtering. |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring primary 3.3V backplane and secondary 2.5V FPGA I/O supply in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized RST and RST2 to hold FPGA and ASIC in reset until both rails stabilize within 140ms. Use Value: Prevents partial configuration and metastability by enforcing strict voltage sequencing - eliminates field failures due to out-of-spec power-up timing. |
Use Scenario: Supervising 24V DC input-derived 5V logic rail and isolated 3.3V microcontroller supply in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: RSTIN monitors auxiliary 1.2V core supply via resistor divider; combined with VCC1/VCC2 monitoring, triggers full-system reset on any rail fault. Use Value: Enables single-chip triple-rail supervision in space-constrained enclosures - reduces PCB area vs. discrete solutions by >40%. |
| Automotive ADAS Camera ECU | Medical Portable Imaging Device |
Use Scenario: Validating 5V camera sensor supply and 1.8V image processor core rail in AEC-Q100-compliant vision modules. IC Role / Device Role / Timing Role: Push-pull RST output drives reset line directly; MR input enables hardware-triggered diagnostic reset during field service. Use Value: Meets ASIL-B functional safety requirements through guaranteed reset behavior down to 0.8V and –40°C to +125°C operation. |
Use Scenario: Managing battery-backed 3.3V MCU supply and 1.2V DSP core in handheld ultrasound units with strict power budget. IC Role / Device Role / Timing Role: 14µA typical supply current extends battery life; RSTIN monitors backup coin-cell voltage to initiate graceful shutdown before depletion. Use Value: Extends operational runtime by minimizing supervisory overhead while ensuring deterministic low-power shutdown sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTSHD3+T | Identical pinout and electrical specs, but uses open-drain RST output instead of push-pull - requires external pullup resistor. | Suitable where level-shifting or wired-OR reset bus is required; not ideal for direct MCU reset pin drive without pullup. | Select MAX6720AUTSHD3+T only if open-drain topology is explicitly needed for bus sharing or voltage translation. |
| TPS3808G33DBVR | Single-supply (3.3V only), no VCC2 or RSTIN inputs; 200ms reset timeout; 1.6µA supply current. | Limited to single-rail systems; lacks dual/third-voltage monitoring capability - cannot replace MAX6719AUTSHD3+T in multivoltage designs. | Choose TPS3808G33DBVR only for cost-sensitive, single-supply applications where dual monitoring is unnecessary. |
Compared with MAX6720AUTSHD3+T and TPS3808G33DBVR, the MAX6719AUTSHD3+T uniquely delivers push-pull dual-supply supervision with adjustable third-rail monitoring in SOT23-6 - enabling compact, high-reliability reset architecture without external components or layout compromises.
Availability
MAX6719AUTSHD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive ADAS ECUs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6719AUTSHD3+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 high integration.
The MAX6715A–MAX6729A family delivers compact, ultra-low-voltage supervisory circuits targeting multirail embedded systems where space, power, and robustness are critical - especially in automotive and industrial control.
FAQ
What is the reset timeout period for MAX6719AUTSHD3+T?
The MAX6719AUTSHD3+T has a fixed minimum reset timeout period of 140ms, denoted by the 'D3' suffix in its part number. This duration is guaranteed over the full –40°C to +125°C operating range and ensures sufficient hold time for microprocessor initialization, FPGA configuration, or boot ROM execution before release. The timeout begins after all monitored supplies (VCC1, VCC2, RSTIN) exceed their respective thresholds.
Does MAX6719AUTSHD3+T support monitoring a third voltage supply?
Yes, MAX6719AUTSHD3+T supports third-voltage monitoring via its RSTIN pin, which features a precise 626.5mV internal reference. By connecting an external resistor divider between the target supply and ground, designers can set custom reset thresholds - for example, monitoring a 1.2V core rail with ~1% accuracy. This eliminates the need for a separate supervisor IC in triple-rail systems.
What is the function of the MR pin on MAX6719AUTSHD3+T?
The MR (Manual Reset) pin on MAX6719AUTSHD3+T is an active-low input with an internal 50kΩ pullup to VCC1. Pulling MR low forces an immediate reset assertion on RST and RST2 outputs, holding them low for the full 140ms timeout period after MR returns high. It enables hardware-initiated resets for diagnostics, field service, or emergency shutdown - and may be left unconnected if unused.
Can the watchdog timer in MAX6719AUTSHD3+T be disabled?
Yes, the watchdog timer in MAX6719AUTSHD3+T is disabled by leaving the WDI pin unconnected. An internal 200nA current source detects the floating state and disables watchdog functionality. If WDI is driven, it must not source more than 50nA; otherwise, false triggering may occur. This hardware-based disable method avoids firmware dependencies and ensures deterministic behavior at power-up.
What package type and footprint does MAX6719AUTSHD3+T use?
MAX6719AUTSHD3+T uses the SOT23-6 package (package code U6+1), measuring 1.6mm × 2.9mm with 0.95mm maximum height. It follows JEDEC MO-178AC outline and requires land pattern 90-0175. This compact, surface-mount package supports high-density PCB layouts and is compatible with standard reflow soldering processes - ideal for space-constrained telecom and automotive modules.
MAX6719AUTSHD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.313V, 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
MAX6719AUTSHD3+T FAQ
1.How can I place an order for MAX6719AUTSHD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719AUTSHD3+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 MAX6719AUTSHD3+T reliable?
The price and inventory of MAX6719AUTSHD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719AUTSHD3+T is usually 5 days.
3.What payment methods are accepted for MAX6719AUTSHD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719AUTSHD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719AUTSHD3+T?
MAX6719AUTSHD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719AUTSHD3+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 MAX6719AUTSHD3+T?
For technical support, including MAX6719AUTSHD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719AUTSHD3+T requirements.
6.How does Aetrix verify that MAX6719AUTSHD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719AUTSHD3+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 MAX6719AUTSHD3+T meets industry standards.
7.What is the process for return or replacement of MAX6719AUTSHD3+T?
All MAX6719AUTSHD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719AUTSHD3+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 MAX6719AUTSHD3+T part is unused and in its original packaging.
Return procedure for MAX6719AUTSHD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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