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Analog Devices Inc./Maxim Integrated MAX6719UTMSD1+
- Part No.:
- MAX6719UTMSD1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6719UTMSD1+.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
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Inventory:2,825
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Product details
Overview
MAX6719UTMSD1+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary), VCC2 (secondary), and an externally adjustable RSTIN input down to 0.626V. It asserts active-low open-drain reset (RST) when any monitored supply falls below its threshold, with guaranteed reset validity down to VCC1 or VCC2 = 0.8V and 14µA typical supply current at 3.6V. It supports manual reset (MR), watchdog timer (WDI), and operates across –40°C to +85°C for embedded power integrity in portable and telecom systems.
For engineers reviewing the MAX6719UTMSD1+ datasheet, MAX6719UTMSD1+ pinout, MAX6719UTMSD1+ application, or MAX6719UTMSD1+ equivalent, key selection criteria include dual/third-supply monitoring capability, 0.626V internal RSTIN reference, 1.1ms–1120ms selectable reset timeout, open-drain RST output referenced to VCC1, and compatibility with low-voltage core/I/O rail supervision in space-constrained designs.
Technical Context
The MAX6719UTMSD1+ integrates three independent voltage comparators: one for VCC1 (factory-trimmed threshold), one for VCC2 (factory-trimmed threshold), and one for RSTIN (fixed 626mV internal reference). Its reset logic combines ORed fault detection across all three inputs and enforces a minimum timeout period after recovery before deasserting RST.
It features a dual-mode watchdog timer-35s minimum startup period followed by 1.12s minimum normal timeout-and includes internal 50kΩ MR pullup, 20nA max RSTIN input current, and immunity to VCC transients <20µs at 100mV overdrive. All outputs are open-drain, requiring external pullups, and reset assertion is guaranteed while either VCC1 or VCC2 ≥ 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 2.125V (typ), factory-trimmed falling threshold for primary supply monitoring |
| VCC2 Reset Threshold | 2.188V (typ), factory-trimmed falling threshold for secondary supply monitoring |
| RSTIN Threshold | 626.5mV (typ), fixed internal reference enabling third-supply monitoring via resistor divider |
| Reset Timeout Period | 1.65ms (typ), D1 suffix defines minimum 1.1ms timeout for fast system recovery |
| Supply Current | 14µA (typ at 3.6V), ultra-low quiescent current enabling battery-operated system use |
| Operating Temperature | –40°C to +85°C, industrial-grade thermal range suitable for telecom and embedded equipment |
| Reset Output Type | Active-low open-drain RST, requires external pullup and supports bidirectional µP reset pins |
Pinout & Package
MAX6719UTMSD1+ is housed in a 6-pin SOT23-6 package with gull-wing leads, 1.6mm × 2.9mm footprint, and 0.95mm height-optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output referenced to VCC1; asserted when VCC1, VCC2, or RSTIN drops below threshold, or MR is pulled low |
| 2 | GND | Ground reference for all internal comparators and logic; must be connected to system ground plane |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; pulse low ≥1µs to force reset |
| 4 | VCC2 | Secondary supply input powering comparator for VCC2 threshold detection; also supplies RST2 if present (not used in MAX6719) |
| 5 | WDI | Watchdog input; rising/falling edge resets dual-mode timer (35s startup → 1.12s normal mode) |
| 6 | VCC1 | Primary supply input powering device core and VCC1 comparator; determines RST output reference and pullup behavior |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous supervision of VCC1 (1.58–4.63V), VCC2 (0.79–3.08V), and RSTIN (0.62V min via divider), eliminating need for discrete supervisors |
| Guaranteed reset validity at low VCC | Reset output remains logically valid even when VCC1 or VCC2 drops to 0.8V-critical for brownout detection in deep-sleep states |
| Dual-mode watchdog timer | 35s minimum startup window allows full system boot before enforcing 1.12s watchdog timeout-prevents false resets during initialization |
| Low-power operation | 14µA typical ICC at 3.6V enables multi-year battery life in always-on IoT sensors and portable medical devices |
| High noise immunity | Immunity to VCC transients <20µs at 100mV overdrive and MR glitch rejection ≤100ns reduce spurious resets in electrically noisy environments |
Applications
| Telecom Power Sequencing | Portable Device Core/I/O Supervision |
|---|---|
Use Scenario: Monitoring 3.3V backplane, 1.8V FPGA core, and 1.2V DDR I/O rails in a small-form-factor base station module. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting RST until all three rails stabilize post-power-up, with D1 timeout ensuring rapid release after sequencing. Use Value: Eliminates discrete RC timing networks and reduces BOM count by consolidating three independent reset functions into one 6-pin IC. |
Use Scenario: Ensuring reliable boot in a handheld diagnostic instrument powered by single-cell Li-ion (3.0–4.2V) with buck-boost converted 1.8V core and 3.3V interface rails. IC Role / Device Role / Timing Role: Supervises main rail (VCC1), regulated core (VCC2), and auxiliary sensor supply (via RSTIN divider); MR enables field-service reset without power cycle. Use Value: 14µA supply current extends battery runtime; open-drain RST interfaces directly to bidirectional µP reset pin without contention. |
| Industrial PLC I/O Module | Set-Top Box Power Management |
Use Scenario: Detecting undervoltage on 24V DC input, isolated 5V logic supply, and 3.3V MCU rail in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Uses RSTIN to monitor scaled-down 24V input via resistor divider; VCC1/VCC2 supervise downstream regulators; WDI monitors firmware health. Use Value: Dual-mode watchdog prevents lockup during firmware updates; guaranteed reset down to 0.8V ensures fail-safe behavior during input sag. |
Use Scenario: Coordinating power-up of SoC (1.1V), memory (1.35V), and HDMI PHY (3.3V) in consumer set-top box with standby-to-wake transition. IC Role / Device Role / Timing Role: VCC1 monitors main 3.3V rail, VCC2 tracks 1.35V memory supply, RSTIN watches 1.1V SoC core via precision divider; D1 timeout enables sub-2ms reset release. Use Value: Factory-trimmed thresholds eliminate calibration; SOT23-6 footprint fits tight layout constraints near SoC power delivery network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTMSD1+ | Same triple-monitor architecture and SOT23-6 package, but features push-pull RST output instead of open-drain | Requires no external pullup; incompatible with bidirectional µP reset pins unless series resistor added | Select MAX6720UTMSD1+ only if system uses unidirectional reset and board layout lacks space for pullup resistor |
| TPS3808G33DBVR | Dual-supply monitor (VDD, VDDIO) only; no RSTIN input; fixed 3.3V threshold on VDD, adjustable on VDDIO; 300ms default timeout (non-D1) | Lacks third-supply monitoring capability; requires external circuitry to add auxiliary voltage supervision | Choose TPS3808G33DBVR only when only two rails require supervision and design can accommodate separate RSTIN solution |
Compared with MAX6719UTMSD1+, MAX6720UTMSD1+ offers push-pull drive but loses bidirectional µP compatibility, while TPS3808G33DBVR reduces feature set to dual monitoring and eliminates RSTIN flexibility-making MAX6719UTMSD1+ the sole choice for compact, three-rail, open-drain–compatible supervision.
Availability
MAX6719UTMSD1+ is available at Aetrix Electronics and suitable for telecom power sequencing, portable device core/I/O supervision, industrial PLC I/O modules, and set-top box power management requiring stable component supply and long-term lifecycle support.
Supply support for MAX6719UTMSD1+ 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6715–MAX6729 family was designed specifically for ultra-low-voltage, multi-rail microprocessor supervision in space-constrained, battery-sensitive applications-emphasizing low ICC, guaranteed reset validity at sub-1V supplies, and flexible monitoring of primary, secondary, and auxiliary voltages.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6719UTMSD1+?
The MAX6719UTMSD1+ has a factory-trimmed VCC1 reset threshold of 2.125V (typical), with a guaranteed range of 2.088V to 2.188V at +25°C. This value corresponds to the 'M' suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide and is specified under falling conditions with ±20ppm/°C tempco.
Does the MAX6719UTMSD1+ support watchdog functionality, and how is it configured?
Yes, the MAX6719UTMSD1+ includes a dual-mode watchdog timer accessible via the WDI pin. After power-up or reset, it enters a 35s minimum startup mode, then transitions to a 1.12s minimum normal timeout upon first WDI edge. No external components or configuration registers are needed-the behavior is hardwired and fully defined in the MAX6719UTMSD1+ datasheet.
Can the MAX6719UTMSD1+ monitor a 1.0V supply using the RSTIN pin?
Yes, the MAX6719UTMSD1+ can monitor a 1.0V supply via RSTIN by using a resistor divider that scales the 1.0V input down to its internal 626.5mV reference. For example, a 1.0V rail would require R1/R2 ≈ 0.595 to produce 626.5mV at RSTIN-enabling precise, adjustable third-supply supervision without additional ICs.
What is the function of Pin 3 (MR) on the MAX6719UTMSD1+, and does it require external pullup?
Pin 3 (MR) is an active-low manual reset input with an internal 50kΩ pullup resistor to VCC1, so no external pullup is required. Driving MR low for ≥1µs forces reset assertion for the full timeout period (1.65ms typ). Leaving MR unconnected defaults it to high, disabling manual reset-making it field-service ready with minimal external components.
Is the MAX6719UTMSD1+ pin-compatible with other devices in the MAX6715–MAX6729 family?
No-while the MAX6719UTMSD1+ shares the SOT23-6 package with MAX6715/16/21/22/23/24, pin assignments differ across variants. Specifically, MAX6719UTMSD1+ places WDI on Pin 5 and VCC2 on Pin 4, whereas MAX6715 uses Pin 5 for GND and MAX6721 places PFI there. PCB layout must match the MAX6719UTMSD1+ specific pinout shown in its datasheet.
MAX6719UTMSD1+ 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:
- -
MAX6719UTMSD1+ FAQ
1.How can I place an order for MAX6719UTMSD1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTMSD1+ 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 MAX6719UTMSD1+ reliable?
The price and inventory of MAX6719UTMSD1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTMSD1+ is usually 5 days.
3.What payment methods are accepted for MAX6719UTMSD1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTMSD1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTMSD1+?
MAX6719UTMSD1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTMSD1+ 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 MAX6719UTMSD1+?
For technical support, including MAX6719UTMSD1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTMSD1+ requirements.
6.How does Aetrix verify that MAX6719UTMSD1+ is sourced from the original manufacturer or authorized distributors?
All MAX6719UTMSD1+ 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 MAX6719UTMSD1+ meets industry standards.
7.What is the process for return or replacement of MAX6719UTMSD1+?
All MAX6719UTMSD1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTMSD1+, 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 MAX6719UTMSD1+ part is unused and in its original packaging.
Return procedure for MAX6719UTMSD1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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