STM6718SFWY6F

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High efficiency, low power consumption
• Package: Surface Mount Technology (SMT)
• Essence: Voltage Supervisor with Watchdog Timer
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timeout Period: Adjustable from 6.4ms to 51.2s
• Reset Threshold Voltage Options: 2.63V, 3.08V, 4.38V, or adjustable
• Power-On Reset Delay: Fixed 100ms delay
• Quiescent Current: 1.5µA typical
• Output Type: Active-Low Push-Pull or Open-Drain

Detailed Pin Configuration

The STM6718SFWY6F IC has the following pin configuration:

1. VDD: Supply voltage input
2. GND: Ground reference
3. MR: Manual reset input
4. WDI: Watchdog timer input
5. RESET: Active-low reset output

Functional Features

• Monitors supply voltage and asserts reset when it falls below the specified threshold.
• Provides a watchdog timer to detect system malfunctions and initiate a reset if necessary.
• Offers an adjustable watchdog timeout period to suit different application requirements.
• Allows manual reset through the MR pin for system debugging or recovery.
• Provides an active-low reset output to reset other devices in the system.

Advantages and Disadvantages

Advantages: - High efficiency power management solution. - Low power consumption extends battery life. - Flexible reset threshold voltage options. - Adjustable watchdog timeout period for customization. - Small form factor and surface mount package for space-saving designs.

Disadvantages: - Limited to a maximum supply voltage of 5.5V. - Fixed power-on reset delay may not suit all applications. - Requires external components for proper operation.

Working Principles

The STM6718SFWY6F is a voltage supervisor IC that continuously monitors the supply voltage. When the voltage falls below the specified threshold, it asserts the reset output, initiating a system reset. Additionally, it incorporates a watchdog timer that requires periodic input pulses (WDI) to prevent system lock-up. If the watchdog timer does not receive the expected pulses within the set timeout period, it triggers a reset as well.

Detailed Application Field Plans

The STM6718SFWY6F is widely used in various applications where reliable power management and system monitoring are crucial. Some potential application fields include:

1. Battery-powered devices: Portable electronics, IoT sensors, wearable devices.
2. Industrial control systems: PLCs, motor control units, robotics.
3. Automotive electronics: Engine control units, infotainment systems, advanced driver-assistance systems (ADAS).
4. Medical equipment: Patient monitoring devices, diagnostic instruments, implantable devices.
5. Home automation: Smart thermostats, security systems, lighting control.

Detailed and Complete Alternative Models

1. STM6717SFWY6F: Similar to STM6718SFWY6F but with fixed reset threshold voltage options.
2. MAX6718SFWY6F: Voltage supervisor IC from Maxim Integrated with comparable features.
3. MIC6718SFWY6F: Voltage supervisor IC from Microchip Technology offering similar functionality.

These alternative models provide similar voltage supervision and watchdog timer capabilities, allowing designers to choose the most suitable option for their specific application requirements.

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