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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:
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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, and supports watchdog timeout with 35s startup and 1.12s normal mode. It is used in multivoltage telecom power systems to ensure reliable µP boot and brownout recovery.
For engineers reviewing the MAX6719UTSHD3+T datasheet, MAX6719UTSHD3+T pinout, MAX6719UTSHD3+T application, or MAX6719UTSHD3+T equivalent, key selection criteria include dual-supply monitoring with factory-trimmed thresholds, RSTIN-based third-voltage supervision down to 0.62V, guaranteed reset validity at VCC1/VCC2 ≥ 0.8V, 14µA typical supply current, and compatibility with noisy industrial environments due to immunity to short VCC transients.
Technical Context
The MAX6719UTSHD3+T implements a dual-threshold voltage monitor (VCC1 = 4.625V, VCC2 = 3.075V) plus a high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap. Its reset logic combines asynchronous inputs - VCC1/VCC2 undervoltage, RSTIN undervoltage, and MR assertion - into a single open-drain RST output with programmable 210ms minimum timeout.
It integrates a dual-mode watchdog timer: 35s minimum initial timeout after reset for system initialization, then automatic transition to 1.12s minimum normal timeout upon first WDI edge detection. The device operates across -40°C to +85°C and guarantees correct reset state down to VCC1 or VCC2 = 0.8V, enabling robust operation during deep brownouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed, ±125mV tolerance); ensures reliable reset assertion when primary supply falls below safe µP operating level |
| VCC2 Reset Threshold | 3.075V (factory-trimmed, ±75mV tolerance); monitors secondary rail such as I/O or memory supply |
| RSTIN Reference Voltage | 626.5mV (internal bandgap, ±15.5mV); enables precise external resistor-divider setup for third-voltage monitoring |
| Reset Timeout Period | 210ms (minimum); holds reset asserted long enough to guarantee full µP and peripheral initialization |
| Supply Current | 14µA (typical at 3.6V); minimizes quiescent load on battery-backed or low-power rails |
| Operating Temperature | -40°C to +85°C; validated for industrial and telecom equipment deployment without derating |
| Reset Output Type | Open-drain active-low RST; allows wired-OR configuration and flexible pullup to any compatible voltage rail |
Pinout & Package
MAX6719UTSHD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix), with gull-wing leads optimized for automated PCB assembly and thermal performance in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts when VCC1/VCC2/RSTIN fall below thresholds or MR is pulled low |
| 2 | GND | Analog/digital ground reference; must be connected to system common ground plane for accurate threshold sensing |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); debounced by design; no external capacitor required |
| 4 | VCC2 | Secondary supply input; powers internal circuitry when > VCC1 and sets VCC2 reset threshold (3.075V) |
| 5 | VCC1 | Primary supply input; powers internal circuitry when > VCC2 and sets VCC1 reset threshold (4.625V) |
| 6 | RSTIN | Adjustable reset comparator input; high-impedance (±25nA); referenced to 626.5mV internal reference for third-voltage monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneous monitoring of VCC1 (4.625V), VCC2 (3.075V), and RSTIN (via 626.5mV reference) eliminates need for discrete comparators or multiple supervisors |
| Dual-mode watchdog timer | 35s startup timeout enables full system boot before entering 1.12s normal monitoring mode - prevents false resets during initialization |
| Guaranteed reset validity down to 0.8V | Ensures deterministic reset behavior even during severe brownout conditions where VCC1 or VCC2 dips near 0.8V |
| Immunity to short VCC transients | Withstands negative-going supply glitches ≤20µs (at 100mV overdrive), reducing susceptibility to noise-induced spurious resets |
| Low 14µA supply current | Enables use in always-on, battery-backed subsystems without compromising runtime or thermal budget |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring primary 4.8V DC-DC output and secondary 3.3V LDO rail in a remote radio unit, while using RSTIN to supervise backup battery voltage. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting open-drain RST to ARM Cortex-M7 processor and FPGA configuration logic during brownout or battery depletion. Use Value: Prevents corrupted firmware execution and FPGA bitstream loading by holding reset until all three rails stabilize above their respective thresholds for ≥210ms. | Use Scenario: Supervising 5V fieldbus interface supply, 3.3V microcontroller core rail, and 2.5V analog sensor reference in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: Dual-threshold supervisor with RSTIN used for auxiliary 2.5V rail; MR pin tied to front-panel reset button; watchdog monitors main µP activity. Use Value: Enables safe cold-start and brownout recovery while providing fail-safe watchdog coverage - critical for unattended operation in factory automation. |
| Network Router Board | Medical Diagnostic Handheld |
Use Scenario: Ensuring clean boot of multi-core SoC in enterprise router by monitoring 1.2V CPU core, 1.8V DDR PHY, and 3.3V management controller supplies. IC Role / Device Role / Timing Role: Triple-voltage supervisor with VCC1 = 3.3V (management rail), VCC2 = 1.8V (DDR), RSTIN configured for 1.2V via resistor divider. Use Value: Eliminates need for three separate supervisors, reducing BOM count and PCB area while maintaining independent reset timing per rail. | Use Scenario: Supervising 3.6V Li-ion battery rail, 3.3V MCU supply, and 1.8V imaging sensor interface in portable ultrasound device. IC Role / Device Role / Timing Role: Battery-aware supervisor using RSTIN to detect end-of-life voltage drop; MR enables clinician-initiated reset; low 14µA ICC extends battery life. Use Value: Guarantees deterministic shutdown before battery sag causes data corruption, meeting IEC 62304 safety requirements for Class B medical devices. |
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 | Identical triple-monitor architecture and pinout, but features push-pull (not open-drain) RST output referenced to VCC1 | Suitable where active-high drive capability or direct connection to µP reset pin without external pullup is required | Select MAX6720UTSHD3+T when system design mandates push-pull reset drive and no wired-OR is needed |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only), no RSTIN input, no watchdog, 200ms fixed timeout, SOT23-6 package | Limited to single-rail monitoring; lacks third-voltage capability and watchdog functionality of MAX6719UTSHD3+T | Use TPS3808G33DBVR only in cost-sensitive, single-rail applications where triple supervision is unnecessary |
Compared with MAX6720UTSHD3+T, the MAX6719UTSHD3+T provides open-drain flexibility for bus sharing and level translation, while TPS3808G33DBVR offers lower cost and simpler qualification but sacrifices RSTIN monitoring, watchdog, and dual-threshold capability essential for multivoltage systems.
Availability
MAX6719UTSHD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and portable medical equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multirail supervisory circuits targeting space-constrained, multivoltage systems where reliability under brownout and noise immunity are critical - especially in telecom, networking, and portable equipment.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6719UTSHD3+T?
The MAX6719UTSHD3+T has a factory-trimmed VCC1 reset threshold of 4.625V (minimum 4.500V, maximum 4.750V) with ±125mV tolerance. This value is encoded in the "SH" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is verified across -40°C to +85°C operating temperature.
Does the MAX6719UTSHD3+T support watchdog functionality?
Yes, the MAX6719UTSHD3+T includes a dual-mode watchdog timer: a 35s minimum startup timeout after power-up or reset, followed by automatic transition to a 1.12s minimum normal timeout upon first valid WDI edge. The WDI pin is present and functional on this variant.
What is the function of the RSTIN pin on the MAX6719UTSHD3+T?
The RSTIN pin on the MAX6719UTSHD3+T is a high-impedance (±25nA) input referenced to a 626.5mV internal bandgap voltage. It enables monitoring of a third system voltage via an external resistor divider, allowing customizable reset thresholds down to 0.62V - a feature not available on dual-supply-only variants like MAX6715/MAX6716.
Is the MAX6719UTSHD3+T pin-compatible with other parts in the MAX6715–MAX6729 family?
Yes, the MAX6719UTSHD3+T uses the standard 6-pin SOT23-6 footprint shared across MAX6715–MAX6722 variants. Pin 1 (RST), Pin 2 (GND), Pin 3 (MR), Pin 4 (VCC2), Pin 5 (VCC1), and Pin 6 (RSTIN) match the mechanical and electrical layout defined for this package group.
What does the "D3" suffix indicate in MAX6719UTSHD3+T?
The "D3" suffix in MAX6719UTSHD3+T specifies a minimum reset timeout period of 210ms, per Maxim's Reset Timeout Period Suffix Guide. This delay ensures sufficient hold time for complex µP and peripheral initialization sequences before release of the RST signal.
MAX6719UTSHD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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-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.
Note: Certain payment methods may incur a processing fee.
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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