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Analog Devices Inc./Maxim Integrated MAX6719UTYDD3
- Part No.:
- MAX6719UTYDD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTYDD3.pdf
- Description:
- IC SUPERVISOR UP SUP CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,409
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Product details
Overview
MAX6719UTYDD3 from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable third supply via RSTIN (626.5mV reference). It asserts active-low open-drain reset for ≥210ms after any monitored voltage drops below threshold or manual reset is triggered. Designed for multivoltage embedded systems requiring reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6719UTYDD3 datasheet, MAX6719UTYDD3 pinout, MAX6719UTYDD3 application, or MAX6719UTYDD3 equivalent, this page delivers verified electrical parameters, reset timing behavior, dual-supply monitoring logic, RSTIN-adjustable third-voltage capability, and validated alternative options for industrial and telecom power supervision designs.
Technical Context
The MAX6719UTYDD3 implements independent dual-threshold comparators for VCC1 and VCC2 with factory-trimmed thresholds (4.625V and 3.075V), plus a high-impedance RSTIN input referenced to a 626.5mV internal bandgap. Its reset timeout is fixed at 210ms (min), determined by the 'D3' suffix, and it features an open-drain RST output with guaranteed valid state down to VCC1 or VCC2 = 0.8V.
This device belongs to the MAX6715–MAX6729 family with BiCMOS process (1072 transistors), supports manual reset (MR) with 50kΩ internal pullup, and provides no watchdog or power-fail functions-confirmed by Selector Guide and Pin Description tables specific to MAX6719.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed falling threshold; ensures reset assertion when primary supply drops below nominal 4.63V rail) |
| VCC2 Threshold | 3.075V (factory-trimmed falling threshold; monitors secondary 3.3V-compatible rail with ±75mV hysteresis) |
| RSTIN Reference | 626.5mV (internal precision reference enabling external resistor-divider setup for third-voltage monitoring down to 0.62V) |
| Reset Timeout | 210ms (minimum guaranteed duration; prevents premature processor release during slow-rising or noisy power rails) |
| Supply Current | 14µA (typical at 3.6V; enables battery-backed or ultra-low-power system supervision without significant load) |
| Operating Temp | -40°C to +85°C (industrial-grade thermal range; validated across full specification limits, not just typical conditions) |
| Reset Output Type | Open-drain active-low RST (requires external pullup; compatible with bidirectional µP reset pins and mixed-voltage I/O domains) |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free compatible (per Ordering Information), footprint per JEDEC MO-178AB.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserted when VCC1/VCC2/RSTIN fall below thresholds or MR is pulled low; requires external pullup to VCC1 or system rail |
| 2 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing and noise immunity |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); reset remains active for full 210ms timeout after MR release |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used; not present on MAX6719 |
| 5 | RSTIN | Adjustable reset input; high-impedance node referenced to 626.5mV internal reference; used with resistor divider to monitor third voltage (e.g., 1.2V core) |
| 6 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core and sets primary reset threshold; minimum operating voltage 0.8V |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage monitoring | VCC1 = 4.625V and VCC2 = 3.075V thresholds eliminate external resistor networks and calibration for main/auxiliary rails |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5mV reference enables precise monitoring of arbitrary supply (e.g., 1.2V, 1.8V, 2.5V) using two standard resistors |
| Guaranteed reset validity down to 0.8V | Ensures correct reset assertion even during deep brownout or partial power loss-critical for fail-safe embedded boot sequences |
| 210ms minimum reset timeout | Prevents spurious release during slow-rising supplies or transient dips; matches typical FPGA/ASIC power-rail stabilization times |
| 14µA typical supply current | Minimizes quiescent load on battery or energy-harvested rails; enables always-on supervision in portable equipment |
Applications
| Industrial PLC Power Sequencing | Telecom Line Card Voltage Monitoring |
|---|---|
Use Scenario: Monitoring 48V-to-3.3V DC/DC converter output and isolated 1.2V FPGA core rail in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset until both 3.3V and 1.2V rails stabilize above 3.075V and 1.14V (via RSTIN divider), with 210ms hold time. Use Value: Prevents FPGA configuration corruption during hot-swap insertion by enforcing strict dual-rail power-good sequencing before release. |
Use Scenario: Supervising primary 5V and secondary 3.3V supplies in optical transceiver modules with tight thermal constraints. IC Role / Device Role / Timing Role: MAX6719UTYDD3 monitors VCC1=5V (4.625V threshold) and VCC2=3.3V (3.075V threshold), asserting open-drain RST to DSP and PHY ICs. Use Value: Eliminates need for discrete comparators and RC timers, reducing BOM count and PCB area in space-constrained SFP+ modules. |
| Medical Infusion Pump MCU Reset | POS Terminal Battery Backup Supervision |
Use Scenario: Ensuring safe MCU reset during AC/DC adapter failure or battery switchover in Class II medical devices. IC Role / Device Role / Timing Role: Uses RSTIN to monitor backup Li-ion cell voltage (via divider), triggering reset if drops below 3.0V while main 3.3V rail remains valid. Use Value: Enables deterministic fail-safe shutdown before battery depletion causes data loss or motor runaway-meeting IEC 62304 requirements. |
Use Scenario: Supervising 5V main and 3.3V logic rails in retail point-of-sale terminals with coin-cell backup for real-time clock. IC Role / Device Role / Timing Role: MAX6719UTYDD3 asserts RST if either rail falls below threshold; MR pin allows service-mode forced reset via front-panel button. Use Value: Guarantees clean restart after power interruption without firmware intervention, improving field reliability and reducing support calls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTYDD3 | Identical pinout, thresholds, and timeout-but push-pull RST output instead of open-drain | Requires no external pullup; incompatible with bidirectional µP reset pins or mixed-voltage I/O domains | Select MAX6720UTYDD3 only when driving CMOS inputs directly and no level-shifting or shared-bus reset is needed |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no RSTIN or VCC2 inputs; 200ms timeout; 1.6µA supply current | Lacks triple-monitoring capability; suitable only for single-rail systems where VCC1=3.3V and no auxiliary rail supervision is required | Choose TPS3808G33DBVR for cost-sensitive, single-rail designs where size and ultra-low current outweigh multi-rail flexibility |
Compared with MAX6719UTYDD3, MAX6720UTYDD3 offers push-pull drive but sacrifices open-drain compatibility, while TPS3808G33DBVR reduces cost and current but eliminates dual/third-voltage monitoring-making MAX6719UTYDD3 the only option for validated triple-rail supervision with flexible reset interface.
Availability
MAX6719UTYDD3 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical infusion pumps, POS terminals, and set-top boxes requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6719UTYDD3 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) is a semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX6715–MAX6729 family was designed specifically for compact, ultra-low-power microprocessor supervision in multivoltage embedded systems-emphasizing factory-trimmed accuracy, minimal external components, and guaranteed operation down to 0.8V.
FAQ
What is the exact reset timeout period of the MAX6719UTYDD3?
The MAX6719UTYDD3 has a minimum reset timeout period of 210ms, as specified by the 'D3' suffix in its part number. This value is guaranteed over the full -40°C to +85°C operating temperature range and is not typical or nominal-it is the shortest duration the RST output remains asserted after all monitored voltages exceed their thresholds. The actual timeout may extend slightly due to process variation but will never fall below 210ms.
Does the MAX6719UTYDD3 include a watchdog timer function?
No, the MAX6719UTYDD3 does not include a watchdog timer. According to the Selector Guide and Functional Diagram in the official datasheet, MAX6719 is explicitly listed without WDI (watchdog input) functionality. Only MAX6721 through MAX6729 variants support watchdog features. The MAX6719UTYDD3 provides triple-voltage monitoring (VCC1, VCC2, RSTIN), manual reset (MR), and open-drain RST output-but no watchdog capability.
Can the MAX6719UTYDD3 monitor a 1.2V supply using the RSTIN pin?
Yes, the MAX6719UTYDD3 can monitor a 1.2V supply using the RSTIN pin. With its internal 626.5mV reference, a simple resistor divider (e.g., R1 = 110kΩ, R2 = 120kΩ) scales 1.2V down to ~626mV at RSTIN. The device's 25nA max input current ensures minimal loading, and the 3mV hysteresis provides noise immunity. This configuration is confirmed in Figure 1 of the datasheet and enables precise undervoltage detection for core rails.
What is the maximum supply voltage the MAX6719UTYDD3 can tolerate on VCC1 and VCC2 pins?
The MAX6719UTYDD3 supports absolute maximum supply voltages of +6V on both VCC1 and VCC2 pins, as stated in the Absolute Maximum Ratings table. However, functional operation is guaranteed only within 0.8V to 5.5V per the Electrical Characteristics section. Operating above 5.5V risks permanent damage and invalidates all parametric guarantees-even briefly-so design must limit VCC1/VCC2 to ≤5.5V under all conditions including transients.
Is the MAX6719UTYDD3 pin-compatible with other devices in the MAX6715–MAX6729 family?
The MAX6719UTYDD3 is pin-compatible with other 6-pin SOT23 variants in the family-including MAX6715, MAX6716, MAX6719, MAX6720, MAX6721, and MAX6722-as confirmed by identical Pin Configurations tables and shared pin numbering. However, functional compatibility depends on feature selection: MAX6719 and MAX6720 share the same pinout but differ in RST output type (open-drain vs. push-pull), while MAX6721 adds WDI on pin 5, making it non-drop-in despite identical packaging.
MAX6719UTYDD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 788mV, 2.188V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6719UTYDD3 FAQ
1.How can I place an order for MAX6719UTYDD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTYDD3 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 MAX6719UTYDD3 reliable?
The price and inventory of MAX6719UTYDD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTYDD3 is usually 5 days.
3.What payment methods are accepted for MAX6719UTYDD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTYDD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTYDD3?
MAX6719UTYDD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTYDD3 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 MAX6719UTYDD3?
For technical support, including MAX6719UTYDD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTYDD3 requirements.
6.How does Aetrix verify that MAX6719UTYDD3 is sourced from the original manufacturer or authorized distributors?
All MAX6719UTYDD3 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 MAX6719UTYDD3 meets industry standards.
7.What is the process for return or replacement of MAX6719UTYDD3?
All MAX6719UTYDD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTYDD3, 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 MAX6719UTYDD3 part is unused and in its original packaging.
Return procedure for MAX6719UTYDD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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