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Analog Devices Inc./Maxim Integrated MAX6719UTSYD5
- Part No.:
- MAX6719UTSYD5
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6719UTSYD5.pdf
- Description:
- IC SUPERVISOR UP SUP CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,940
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Product details
Overview
MAX6719UTSYD5 from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V and 3.075V, 210ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and multivoltage embedded systems.
For engineers reviewing the MAX6719UTSYD5 datasheet, MAX6719UTSYD5 pinout, MAX6719UTSYD5 application, or MAX6719UTSYD5 equivalent, this page delivers verified electrical specs, dual-supply threshold behavior, RSTIN-adjustable monitoring capability, watchdog timing architecture, and real-world design implications for brownout immunity and manual reset integration.
Technical Context
The MAX6719UTSYD5 implements dual independent voltage comparators for VCC1 and VCC2 plus a dedicated high-impedance RSTIN input referenced to a 626.5mV internal bandgap, enabling precise third-supply monitoring via external resistor divider. Its reset logic asserts active-low RST on any threshold violation and holds for a fixed 210ms (min) timeout after recovery.
This variant includes manual reset (MR) with 50kΩ internal pullup to VCC1, open-drain RST output referenced to VCC1, and no watchdog or power-fail functionality - confirmed by Selector Guide and Pin Configuration tables. It operates across -40°C to +85°C with 14µA typical supply current at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (typ), factory-trimmed - sets primary supply brownout detection point for 5V or 4.8V rails |
| VCC2 Threshold | 3.075V (typ), factory-trimmed - monitors secondary 3.3V rail with ±75mV hysteresis |
| RSTIN Threshold | 626.5mV (typ), internal reference - enables adjustable third-supply monitoring down to 0.62V via resistor divider |
| Reset Timeout | 210ms (min) - ensures µP reset pulse meets boot initialization timing requirements |
| Supply Current | 14µA (typ) at 3.6V - supports ultra-low-power battery-backed or always-on monitoring |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments |
| Package | SOT23-6 - surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
SOT23-6 package with 1.6mm × 2.9mm footprint, 0.95mm height, and gull-wing leads; RoHS-compliant lead-free option available (replace -T with +T).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserted when VCC1/VCC2/RSTIN drop below thresholds or MR pulled low |
| 2 | GND | Analog/digital ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual reset input; 50kΩ internal pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if enabled |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers device core and sets RST output reference |
| 6 | RSTIN | High-impedance adjustable monitor input; compares against 626.5mV reference; used for third-supply undervoltage detection |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | 4.625V (VCC1) and 3.075V (VCC2) with ±0.125V tolerance - eliminates external resistor calibration for standard rails |
| Adjustable third-supply monitoring | RSTIN input with 626.5mV internal reference and <25nA leakage - enables precision monitoring of sub-1V supplies using high-value dividers |
| Guaranteed reset validity at low VCC | Functional reset assertion guaranteed down to VCC1 or VCC2 = 0.8V - supports deep brownout detection before system collapse |
| Immunity to short VCC transients | No false reset for negative-going glitches ≤20µs at 100mV overdrive - prevents spurious resets during switching noise |
| Low quiescent current | 14µA typical at 3.6V - extends battery life in portable equipment and reduces thermal load in dense layouts |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring 48V-to-5V/3.3V DC/DC converter outputs in base station line cards where sequential power-up and brownout detection are critical. IC Role / Device Role / Timing Role: Dual-threshold supervisor ensuring VCC1 (5V) and VCC2 (3.3V) remain within spec before releasing µP reset; RSTIN monitors auxiliary 1.8V FPGA core rail. Use Value: Prevents firmware corruption during partial power loss by asserting reset within 20µs of threshold breach and holding for 210ms to guarantee clean boot. |
Use Scenario: Supervising isolated 24V field power, 5V logic, and 3.3V microcontroller rails in programmable logic controller backplanes exposed to EMI and voltage sags. IC Role / Device Role / Timing Role: Triple-voltage monitor detecting simultaneous failure of primary and secondary supplies while MR provides field-service reset capability. Use Value: Enables deterministic fail-safe state transition via open-drain RST driving optocoupler-isolated reset lines without level-shifting components. |
| Portable Medical Sensors | Set-Top Box Power Management |
Use Scenario: Battery-powered glucose meter with Li-ion (3.0–4.2V), LDO-regulated 3.3V, and buck-converted 1.8V rails requiring ultra-low-current supervision. IC Role / Device Role / Timing Role: Low-ICC (14µA) triple-supervisor validating all rails before enabling Bluetooth radio and sensor ADC. Use Value: Extends single-charge operation by >12 hours versus higher-current supervisors while maintaining 210ms reset hold for safe firmware initialization. |
Use Scenario: Consumer STB with multiple SoC domains (CPU, GPU, memory, tuner) powered by independent 1.2V, 1.8V, and 3.3V regulators subject to transient load drops. IC Role / Device Role / Timing Role: Centralized reset arbiter using RSTIN to monitor 1.2V core rail and MR for remote IR-triggered soft reset. Use Value: Eliminates need for discrete RC reset circuits and reduces BOM count by integrating three independent monitors into one 6-pin SOT23. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTSYD5 | Push-pull RST output instead of open-drain; identical thresholds, timeout, and RSTIN capability | Requires no external pullup resistor; incompatible with bidirectional µP reset pins without series resistor | Select MAX6720UTSYD5 when driving CMOS inputs directly or when board space prohibits pullup placement |
| TPS3808G33DBVR | Dual-supply only (no RSTIN); 3.3V fixed VDD threshold; 200ms timeout; 1.6µA ICC | Lacks third-supply monitoring; lower supply current but cannot replace MAX6719UTSYD5 in triple-rail designs | Choose TPS3808G33DBVR only for cost-sensitive dual-rail applications where RSTIN functionality is unused |
Compared with MAX6720UTSYD5 and TPS3808G33DBVR, the MAX6719UTSYD5 uniquely balances open-drain flexibility, triple-supply coverage, and industrial temperature range - making it irreplaceable in designs requiring RSTIN-based auxiliary rail monitoring without push-pull drive constraints.
Availability
MAX6719UTSYD5 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, portable medical devices, and set-top box power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6719UTSYD5 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 leadership in supervisory, PMIC, and data-converter technologies.
The MAX6715–MAX6729 family was engineered for multivoltage embedded systems needing compact, low-power, triple-rail supervision with factory-trimmed accuracy - targeting telecom, industrial, and portable equipment where reliability under brownout conditions is non-negotiable.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6719UTSYD5?
The MAX6719UTSYD5 has factory-trimmed reset thresholds of 4.625V (VCC1, suffix 'Y') and 3.075V (VCC2, suffix 'S'), with ±0.125V tolerance over temperature. These values are specified in the Reset Voltage Threshold Suffix Guide and confirmed in Electrical Characteristics tables - not adjustable or user-configurable. The MAX6719UTSYD5 uses these fixed thresholds to monitor primary and secondary supplies without external resistors.
Does the MAX6719UTSYD5 include watchdog timer functionality?
No, the MAX6719UTSYD5 does not include watchdog timer functionality. Per the Selector Guide and Pin Description table, MAX6719 variants lack WDI (Watchdog Input) pin assignment and internal watchdog circuitry. Watchdog capability is present only in MAX6721–MAX6729 parts. The MAX6719UTSYD5 relies solely on voltage monitoring and manual reset for system supervision.
What is the function of the RSTIN pin on the MAX6719UTSYD5, and how is it used?
The RSTIN pin on the MAX6719UTSYD5 is a high-impedance input referenced to a 626.5mV internal bandgap voltage, enabling external adjustment of a third-supply reset threshold via resistor divider. When RSTIN falls below 626.5mV, the RST output asserts. This allows monitoring of auxiliary rails (e.g., 1.2V, 1.8V) without adding discrete comparators - a key differentiator of the MAX6719UTSYD5 versus dual-supply-only supervisors.
Is the MAX6719UTSYD5 pin-compatible with other parts in the MAX6715–MAX6729 family?
The MAX6719UTSYD5 is pin-compatible with other 6-pin SOT23 variants in the family (e.g., MAX6716UTSYD5, MAX6720UTSYD5) sharing the same pinout: Pin 1=RST, Pin 2=GND, Pin 3=MR, Pin 4=VCC2, Pin 5=VCC1, Pin 6=RSTIN. However, functional differences exist - e.g., MAX6719UTSYD5 has open-drain RST and RSTIN, while MAX6720UTSYD5 has push-pull RST and same RSTIN - so direct substitution requires verification of output type and feature set.
What is the minimum supply voltage required for valid reset operation of the MAX6719UTSYD5?
The MAX6719UTSYD5 guarantees valid reset output logic state when either VCC1 or VCC2 remains greater than 0.8V - explicitly stated in the General Description and Absolute Maximum Ratings. Below 0.8V, reset behavior is not guaranteed. This specification enables reliable brownout detection in systems where supply collapse occurs gradually, and distinguishes the MAX6719UTSYD5 from supervisors requiring ≥1.0V or higher for reset assertion.
MAX6719UTSYD5 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:
- 2.188V, 2.925V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6719UTSYD5 FAQ
1.How can I place an order for MAX6719UTSYD5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTSYD5 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 MAX6719UTSYD5 reliable?
The price and inventory of MAX6719UTSYD5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTSYD5 is usually 5 days.
3.What payment methods are accepted for MAX6719UTSYD5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTSYD5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTSYD5?
MAX6719UTSYD5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTSYD5 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 MAX6719UTSYD5?
For technical support, including MAX6719UTSYD5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTSYD5 requirements.
6.How does Aetrix verify that MAX6719UTSYD5 is sourced from the original manufacturer or authorized distributors?
All MAX6719UTSYD5 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 MAX6719UTSYD5 meets industry standards.
7.What is the process for return or replacement of MAX6719UTSYD5?
All MAX6719UTSYD5 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTSYD5, 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 MAX6719UTSYD5 part is unused and in its original packaging.
Return procedure for MAX6719UTSYD5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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