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Analog Devices Inc./Maxim Integrated MAX6719UTSHD3-T
- Part No.:
- MAX6719UTSHD3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTSHD3-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,754
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Product details
Overview
MAX6719UTSHD3-T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable RSTIN input (626.5mV reference). It asserts active-low open-drain reset for ≥210ms after any monitored supply 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 MAX6719UTSHD3-T datasheet, MAX6719UTSHD3-T pinout, MAX6719UTSHD3-T application, or MAX6719UTSHD3-T equivalent, this page delivers verified specifications, exact pin functions, real-world use cases in telecom and portable equipment, and two validated alternative parts with documented functional differences.
Technical Context
The MAX6719UTSHD3-T integrates dual factory-trimmed voltage comparators (VTH1 = 4.625V, VTH2 = 3.075V) and a high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap. Its reset timeout is fixed at 210ms (min), and it features an open-drain RST output with guaranteed valid logic down to VCC1 or VCC2 = 0.8V.
This device supports triple-supply monitoring via resistor-divider networks on RSTIN, includes manual reset (MR) with 50kΩ internal pullup to VCC1, and provides glitch-immune reset assertion with 20µs VCC-to-RST delay. It operates across -40°C to +85°C and draws only 14µA typical supply current at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, ±125mV tolerance); ensures reliable reset during 5V rail brownout |
| VCC2 Threshold | 3.075V (factory-trimmed, ±75mV tolerance); monitors 3.3V I/O or auxiliary supply |
| RSTIN Reference | 626.5mV internal reference; enables precise third-supply monitoring down to 0.62V via external divider |
| Reset Timeout | 210ms minimum; meets boot-time requirements for ARM Cortex-M and similar MCUs |
| Supply Current | 14µA typical at 3.6V; minimizes quiescent load in battery-backed systems |
| Operating Temp | -40°C to +85°C; qualified for industrial and telecom infrastructure environments |
| Reset Output | Active-low open-drain RST; requires external pullup, compatible with 1.8–5.5V logic domains |
Pinout & Package
MAX6719UTSHD3-T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free compliant. Pin 1 marked with dot; pins arranged in standard SOT23 layout with GND at Pin 2, VCC2 at Pin 4, VCC1 at Pin 6.
| Pin/Terminal | 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 |
| 2 | GND | Analog/digital ground reference; must be connected to system ground plane for stable threshold operation |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (0.9–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | RSTIN | Adjustable undervoltage monitor input; high-impedance (±25nA), referenced to 626.5mV internal reference |
| 6 | VCC1 | Primary supply input (1.8–5.0V range); powers device core and sets primary reset threshold and RST output reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed thresholds | VTH1 = 4.625V (±125mV), VTH2 = 3.075V (±75mV); eliminates external resistor calibration for main rails |
| Externally adjustable RSTIN | 626.5mV internal reference with <3mV hysteresis; supports third-rail monitoring from 0.62V using two resistors |
| Guaranteed reset validity | Operates correctly with VCC1 or VCC2 ≥ 0.8V; ensures robust reset assertion during deep brownout |
| Low supply current | 14µA typical at 3.6V; reduces standby power in always-on IoT nodes and portable devices |
| Glitch immunity | Immune to VCC transients ≤20µs (at 100mV overdrive); prevents spurious resets in noisy power environments |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitoring 48V-to-5V DC/DC primary output and isolated 3.3V I/O rail in remote radio unit power management. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting reset until both rails stabilize post-power-up and during AC line sag. Use Value: Prevents firmware execution on unstable supplies; 210ms timeout aligns with DC/DC soft-start and FPGA configuration time. |
Use Scenario: Ensuring safe startup of microcontroller and analog front-end in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Triple-supply monitor verifying 24V system rail, 5V logic rail, and 3.3V ADC reference before enabling outputs. Use Value: RSTIN enables precise 2.5V reference rail monitoring; open-drain RST interfaces directly with 3.3V MCU reset pin. |
| Portable Medical Monitor | Battery-Powered Edge Gateway |
|
Use Scenario: Managing power integrity in handheld ECG device with Li-ion battery, buck-boost converter (3.3V), and LDO (1.8V core). IC Role / Device Role / Timing Role: Supervises battery voltage (via RSTIN divider), 3.3V I/O, and 1.8V core rails; triggers graceful shutdown on low-battery event. Use Value: 14µA quiescent current extends battery life; 0.8V valid-reset guarantee ensures reset assertion even during deep discharge. |
Use Scenario: Securing boot sequence in cellular-connected edge node with dual SIM power rails and RF module supply. IC Role / Device Role / Timing Role: Monitors main 3.8V battery rail, 3.3V modem supply, and 1.2V RF synthesizer supply via RSTIN network. Use Value: Factory-trimmed thresholds eliminate calibration overhead; SOT23-6 footprint saves PCB area in space-constrained gateway design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTSHD3-T | Push-pull RST output (vs. open-drain); identical thresholds, timeout, and pinout | Requires no external pullup; incompatible with wired-OR reset buses or mixed-voltage reset domains | Select when driving single 3.3V or 5V MCU reset pin without bus sharing |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no RSTIN input; 200ms timeout; SOT23-6 | Lacks triple-monitoring capability; cannot replace RSTIN-based third-rail supervision | Use only for cost-sensitive 3.3V-only systems where auxiliary rail monitoring is handled separately |
Compared with MAX6719UTSHD3-T, MAX6720UTSHD3-T offers push-pull drive for simpler interface but sacrifices bus-sharing flexibility, while TPS3808G33DBVR reduces functionality to single-rail monitoring-neither is pin-compatible nor functionally equivalent without redesign.
Availability
MAX6719UTSHD3-T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed factory-trimmed voltage thresholds.
Supply support for MAX6719UTSHD3-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, sensing, and interface applications, with emphasis on reliability and integration.
The MAX6715–MAX6729 family delivers compact, ultra-low-power supervisory circuits for multivoltage embedded systems-specifically engineered to replace discrete reset solutions in space- and power-constrained designs.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6719UTSHD3-T?
The MAX6719UTSHD3-T has a factory-trimmed VCC1 reset threshold of 4.625V (minimum 4.500V, maximum 4.750V) with ±20ppm/°C tempco. This value is encoded in the "SH" suffix per Maxim's Reset Voltage Threshold Suffix Guide and applies across the full -40°C to +85°C operating range.
Does MAX6719UTSHD3-T support monitoring a third voltage, and how is it configured?
Yes, MAX6719UTSHD3-T supports third-voltage monitoring via the RSTIN pin, which references an internal 626.5mV bandgap. To monitor a custom voltage (e.g., 2.5V), connect a resistor divider between the target rail and GND, with the midpoint fed to RSTIN. The formula is VEXT_TH = 626.5mV × (R1 + R2)/R2.
What is the reset timeout period for MAX6719UTSHD3-T, and is it adjustable?
The MAX6719UTSHD3-T has a fixed reset timeout period of 210ms (minimum), specified by the "D3" suffix in its part number. This timeout is factory-set and not user-adjustable; it ensures sufficient hold time for microcontroller initialization after power stabilization.
What type of reset output does MAX6719UTSHD3-T provide, and what are its drive requirements?
MAX6719UTSHD3-T provides an active-low open-drain RST output. It requires an external pullup resistor (typically 4.7kΩ to 10kΩ) to the target logic rail (e.g., 3.3V or 5V). The output sinks ≥1.2mA at VCC ≥ 2.7V and VOL ≤ 0.3V, ensuring solid logic-low assertion across voltage domains.
Can MAX6719UTSHD3-T operate reliably when VCC1 drops below 1.0V?
Yes, MAX6719UTSHD3-T guarantees valid reset output logic state down to VCC1 or VCC2 = 0.8V. Below 0.8V, reset behavior is not specified-but for applications requiring reset assertion all the way to 0V, a 100kΩ pull-down resistor from RST to GND is recommended (per Maxim application note).
MAX6719UTSHD3-T 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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6719UTSHD3-T FAQ
1.How can I place an order for MAX6719UTSHD3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTSHD3-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 MAX6719UTSHD3-T reliable?
The price and inventory of MAX6719UTSHD3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTSHD3-T is usually 5 days.
3.What payment methods are accepted for MAX6719UTSHD3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTSHD3-T transactions.
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4.How is shipping managed for MAX6719UTSHD3-T?
MAX6719UTSHD3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTSHD3-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 MAX6719UTSHD3-T?
For technical support, including MAX6719UTSHD3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTSHD3-T requirements.
6.How does Aetrix verify that MAX6719UTSHD3-T is sourced from the original manufacturer or authorized distributors?
All MAX6719UTSHD3-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 MAX6719UTSHD3-T meets industry standards.
7.What is the process for return or replacement of MAX6719UTSHD3-T?
All MAX6719UTSHD3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTSHD3-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 MAX6719UTSHD3-T part is unused and in its original packaging.
Return procedure for MAX6719UTSHD3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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