STM811RW16F

Product Overview

• Category: Integrated Circuit
• Use: Reset Supervisor
• Characteristics: Low-power, voltage monitor, manual reset input, watchdog timer, adjustable reset threshold
• Package: SOT-23-3
• Essence: Ensures reliable system startup and operation by monitoring the power supply voltage
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Options: 2.63V, 2.93V, 3.08V, 4.38V
• Reset Timeout Period: 140ms, 560ms, 1120ms, 2240ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The STM811RW16F has a simple three-pin configuration:

• Pin 1 (VDD): Connects to the positive supply voltage (1.6V to 5.5V)
• Pin 2 (GND): Connects to the ground reference
• Pin 3 (MR): Manual Reset Input. When pulled low, it forces a reset condition.

Functional Features

1. Voltage Monitoring: The STM811RW16F continuously monitors the supply voltage and asserts a reset signal when it falls below the specified threshold.
2. Manual Reset Input: The device provides a manual reset input pin that allows an external signal to force a reset condition.
3. Watchdog Timer: It includes a built-in watchdog timer that can be used to detect software or hardware failures and initiate a system reset if necessary.
4. Adjustable Reset Threshold: The reset threshold voltage can be adjusted to suit different system requirements.

Advantages and Disadvantages

Advantages: - Ensures reliable system startup and operation - Low-power consumption - Adjustable reset threshold for flexibility - Built-in watchdog timer for enhanced system reliability

Disadvantages: - Limited reset timeout options - Only available in SOT-23-3 package

Working Principles

The STM811RW16F operates by continuously monitoring the supply voltage. When the voltage falls below the set threshold, it asserts a reset signal to initiate a system reset. The device also includes a watchdog timer that can be used to detect software or hardware failures. If a failure is detected, the watchdog timer triggers a system reset to ensure proper operation.

Detailed Application Field Plans

The STM811RW16F is commonly used in various applications where reliable system operation is critical. Some of the typical application fields include:

1. Embedded Systems: Used in microcontroller-based systems to ensure proper initialization and reliable operation.
2. Industrial Automation: Employed in industrial control systems to monitor power supply voltage and prevent erratic behavior.
3. Consumer Electronics: Integrated into electronic devices like smartphones, tablets, and gaming consoles to enhance system reliability.
4. Automotive Electronics: Utilized in automotive applications to monitor critical voltages and ensure safe operation of vehicle systems.

Detailed and Complete Alternative Models

1. MAX811: Manufactured by Maxim Integrated, offers similar functionality with adjustable reset thresholds and watchdog timer.
2. TC54: Produced by Microchip Technology, provides voltage monitoring and manual reset input in a compact SOT-23 package.
3. XC6120: Developed by Torex Semiconductor, features ultra-low power consumption and adjustable reset threshold options.

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