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Analog Devices Inc./Maxim Integrated MAX6719UTTED3+T
- Part No.:
- MAX6719UTTED3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6719UTTED3+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,079
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Product details
Overview
MAX6719UTTED3+T 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 reset timeout, and open-drain active-low RST output. It ensures reliable system reset during brownout, power-up, or manual intervention in battery-powered and multivoltage embedded systems.
For engineers reviewing the MAX6719UTTED3+T datasheet, MAX6719UTTED3+T pinout, MAX6719UTTED3+T application, or MAX6719UTTED3+T equivalent, key selection factors include dual-supply monitoring range (1.58–4.63V / 0.79–3.08V), 626mV RSTIN reference for auxiliary voltage tracking, 14µA typical supply current at 3.6V, guaranteed reset validity down to VCC = 0.8V, and compatibility with manual reset, watchdog, and power-fail signaling functions.
Technical Context
The MAX6719UTTED3+T implements a dual-threshold comparator architecture: one for VCC1 (4.625V ±125mV), one for VCC2 (3.075V ±75mV), and a high-impedance RSTIN input referenced to an internal 626.5mV bandgap. Reset assertion occurs when any monitored voltage falls below its threshold and remains asserted for a minimum 210ms timeout after recovery.
It features an open-drain RST output referenced to VCC1, internal 50kΩ MR pullup, and no integrated watchdog or PFI/PFO-confirmed by Selector Guide and Pin Description tables. The device operates across -40°C to +85°C and draws only 14µA typical supply current at 3.6V, enabling ultra-low-power system supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (±125mV) - sets primary supply brownout detection point for 5V/4.8V rails |
| VCC2 Threshold | 3.075V (±75mV) - enables reliable monitoring of 3.3V I/O or core supplies |
| RSTIN Reference | 626.5mV - allows external resistor-divider to monitor third supply as low as 0.62V |
| Reset Timeout | 210ms (min) - ensures sufficient hold time for µP initialization and peripheral stabilization |
| Supply Current | 14µA (typ @ 3.6V) - supports multi-year battery life in portable equipment |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom environments without derating |
| Reset Output Type | Open-drain active-low RST - compatible with bidirectional µP reset pins and level-shifting interfaces |
Pinout & Package
MAX6719UTTED3+T is housed in a 6-pin SOT23-6 package with gull-wing leads, 1.6mm × 2.9mm footprint, and 0.95mm height-optimized for space-constrained PCB layouts in portable and networking gear.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts when VCC1/VCC2/RSTIN drop below threshold or MR is pulled low |
| 2 | GND | Analog/digital ground reference for all comparators and internal logic |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); initiates reset on falling edge and holds for full timeout period |
| 4 | VCC2 | Secondary supply input (0.9–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8–5.0V range); powers device core, sets RST reference, and sources internal pullups |
| 6 | RSTIN | High-impedance adjustable monitor input; referenced to 626.5mV internal reference; enables third-supply supervision via resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | 4.625V (VCC1) and 3.075V (VCC2) with ±0.5% hysteresis - eliminates external resistor calibration for standard rail supervision |
| Adjustable third-supply monitoring | RSTIN input with 626.5mV internal reference - supports monitoring of sub-1V supplies (e.g., 1.2V, 1.0V, 0.9V) using two external resistors |
| Guaranteed reset validity down to 0.8V | Functional reset assertion even when VCC1 or VCC2 drops to 0.8V - ensures fail-safe behavior during deep brownout conditions |
| Ultra-low quiescent current | 14µA typical at 3.6V - reduces standby power in always-on battery-backed systems by >50% vs. legacy supervisors |
| Immunity to short VCC transients | Withstands <20µs negative glitches ≥100mV below threshold - prevents spurious resets in noisy power environments |
Applications
| Industrial PLC Controller | 5G Small Cell Baseband Unit |
|---|---|
|
Use Scenario: Supervises dual-rail power (5V analog, 3.3V digital) and FPGA core voltage (1.2V) during cold start and brownout events. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting open-drain RST to hold FPGA and MCU in reset until all rails stabilize above 4.625V, 3.075V, and 1.2V×(R1+R2)/R2 respectively. Use Value: Prevents configuration corruption by enforcing 210ms minimum reset hold time after VCC1/VCC2/RSTIN recovery-matching FPGA bitstream load timing requirements. |
Use Scenario: Monitors 48V-to-12V DC/DC primary output, 12V system rail, and 1.8V RFIC bias supply in thermally constrained outdoor enclosure. IC Role / Device Role / Timing Role: Detects undervoltage on 12V rail (VCC2 = 3.075V threshold) and 1.8V bias (via RSTIN divider), triggering coordinated shutdown before RFIC latch-up. Use Value: 14µA supply current minimizes self-heating in sealed enclosure; 0.8V reset validity ensures supervision remains active during 12V sag to 0.9V under peak transmit load. |
| Medical Point-of-Care Monitor | Smart Energy Meter |
|
Use Scenario: Ensures safe boot sequence for ARM Cortex-M4 host and ADC/DAC subsystems powered from Li-ion battery (3.0–4.2V) and LDO-regulated 1.8V/3.3V rails. IC Role / Device Role / Timing Role: Uses VCC1 = 3.075V (for battery rail), VCC2 = 1.8V (core), and RSTIN for 3.3V I/O - all monitored simultaneously with single IC. Use Value: Eliminates three discrete supervisors, reducing BOM count and PCB area by 65%; open-drain RST interfaces directly to bidirectional reset pin of medical-grade MCU. |
Use Scenario: Supervises isolated 3.3V microcontroller supply, 5V metrology ADC supply, and backup supercapacitor voltage (0.9V) in ANSI C12.20-compliant meter. IC Role / Device Role / Timing Role: RSTIN monitors supercap voltage via 0.626V reference to initiate graceful shutdown before energy depletion; MR enables field technician reset. Use Value: 210ms timeout aligns with ANSI C12.22 firmware restart window; 626.5mV RSTIN reference enables accurate 0.9V trip point with <1% resistor tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTTED3+T | Push-pull RST output instead of open-drain; identical thresholds, timeout, and pinout | Requires no external pullup; incompatible with bidirectional µP reset pins without series resistor | Select MAX6720UTTED3+T when driving CMOS inputs directly or when board layout prohibits external pullup routing |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no RSTIN or VCC2 inputs; 200ms timeout; 2.5µA supply current | Lacks triple-monitoring capability; cannot replace MAX6719UTTED3+T in multirail systems without redesign | Consider only for simplified 3.3V-only designs where cost and ultra-low current outweigh supervision flexibility |
Compared with MAX6719UTTED3+T, MAX6720UTTED3+T offers push-pull drive for lower BOM count but sacrifices µP interface flexibility, while TPS3808G33DBVR reduces current consumption by 82% but abandons dual/third-supply monitoring entirely-making it unsuitable for systems requiring coordinated rail validation.
Availability
MAX6719UTTED3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, 5G small cell baseband units, medical point-of-care monitors, smart energy meters, and telecom line cards requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6719UTTED3+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) is a semiconductor leader 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 space- and power-constrained multivoltage systems needing reliable, low-cost, single-chip supervision of primary, secondary, and auxiliary supplies-replacing discrete solutions with guaranteed timing and factory-trimmed accuracy.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6719UTTED3+T?
The MAX6719UTTED3+T has factory-trimmed reset thresholds of 4.625V (±125mV) for VCC1 and 3.075V (±75mV) for VCC2, as defined by the "TT" suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide. These values are measured at TA = +25°C and exhibit ±20ppm/°C tempco over -40°C to +85°C.
Does the MAX6719UTTED3+T include a watchdog timer or power-fail functionality?
No, the MAX6719UTTED3+T does not include watchdog timer or power-fail input/output functionality. Per the Selector Guide and Pin Description, it supports only dual-supply monitoring (VCC1/VCC2), adjustable third-supply monitoring (RSTIN), manual reset (MR), and open-drain RST output-distinguishing it from MAX6721–MAX6729 variants that add WDI or PFI/PFO.
How is the 210ms reset timeout period implemented in the MAX6719UTTED3+T?
The 210ms minimum reset timeout in the MAX6719UTTED3+T is set by the "D3" suffix and implemented via an internal RC oscillator and counter circuit. It begins timing when all monitored voltages (VCC1, VCC2, RSTIN) rise above their respective thresholds-or when MR transitions high-and holds RST low for ≥210ms regardless of subsequent voltage fluctuations within that window.
Can the MAX6719UTTED3+T monitor a 1.2V supply using the RSTIN pin?
Yes, the MAX6719UTTED3+T can monitor a 1.2V supply using RSTIN by connecting a resistor divider (e.g., R1 = 1.02MΩ, R2 = 200kΩ) between the 1.2V rail and GND, with RSTIN tied to the node. Since the internal RSTIN reference is 626.5mV, this configuration triggers reset when the 1.2V rail drops to 1.2V × (626.5mV / (626.5mV + R2/(R1+R2))) ≈ 1.02V.
What is the maximum supply voltage the MAX6719UTTED3+T can tolerate on VCC1 and VCC2 pins?
The MAX6719UTTED3+T supports absolute maximum supply voltages of +6V on both VCC1 and VCC2 pins, as specified in the Absolute Maximum Ratings table. However, functional operation is guaranteed only from 0.8V to 5.5V per Electrical Characteristics-so sustained operation above 5.5V risks permanent damage despite the 6V rating.
MAX6719UTTED3+T 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:
- -
MAX6719UTTED3+T FAQ
1.How can I place an order for MAX6719UTTED3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6719UTTED3+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 MAX6719UTTED3+T reliable?
The price and inventory of MAX6719UTTED3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6719UTTED3+T is usually 5 days.
3.What payment methods are accepted for MAX6719UTTED3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6719UTTED3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6719UTTED3+T?
MAX6719UTTED3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6719UTTED3+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 MAX6719UTTED3+T?
For technical support, including MAX6719UTTED3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6719UTTED3+T requirements.
6.How does Aetrix verify that MAX6719UTTED3+T is sourced from the original manufacturer or authorized distributors?
All MAX6719UTTED3+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 MAX6719UTTED3+T meets industry standards.
7.What is the process for return or replacement of MAX6719UTTED3+T?
All MAX6719UTTED3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6719UTTED3+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 MAX6719UTTED3+T part is unused and in its original packaging.
Return procedure for MAX6719UTTED3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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