LM8502TME/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision, Low Power Consumption
• Package: SOT-23-5
• Essence: Monitors and controls voltage levels in electronic systems
• Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 6.0V
• Threshold Voltage Options: 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
• Reset Timeout Period: Adjustable from 1ms to 10s
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 1.5µA typical
• Output Type: Active-Low Open Drain

Pin Configuration

The LM8502TME/NOPB is a 5-pin device with the following pin configuration:

1. GND: Ground connection
2. RESET: Active-low reset output
3. VDD: Positive supply voltage input
4. MR: Manual reset input
5. TH: Threshold voltage selection input

Functional Features

• Monitors the supply voltage and generates a reset signal when it falls below a specified threshold.
• Provides an adjustable reset timeout period to allow for different system requirements.
• Offers a manual reset input for immediate system reset.
• Active-low open drain output allows easy interfacing with other devices.

Advantages and Disadvantages

Advantages: - High precision voltage monitoring ensures reliable system operation. - Low quiescent current minimizes power consumption. - Adjustable reset timeout period provides flexibility. - Small package size enables space-saving designs.

Disadvantages: - Limited threshold voltage options may not suit all applications. - Active-low open drain output requires external pull-up resistor.

Working Principles

The LM8502TME/NOPB operates by comparing the supply voltage with a user-defined threshold voltage. When the supply voltage drops below the threshold, the reset output is activated, indicating a power failure or an out-of-range condition. The reset signal remains active until the supply voltage rises above the threshold and the reset timeout period elapses.

Application Field Plans

The LM8502TME/NOPB finds application in various electronic systems where reliable voltage monitoring is critical. Some potential fields of use include:

1. Battery-powered devices: Ensures proper shutdown or system reset when battery voltage drops too low.
2. Industrial control systems: Monitors power supply integrity to prevent damage to sensitive equipment.
3. Automotive electronics: Protects against voltage fluctuations that could affect vehicle performance.
4. Home automation: Provides voltage supervision for smart home devices to maintain stable operation.

Alternative Models

For users seeking alternative options, the following ICs can be considered:

1. MAX823: Voltage supervisor with adjustable threshold and reset timeout.
2. LTC2910: Precision voltage monitor with programmable threshold levels.
3. TPS3808: Ultra-low quiescent current supervisor with fixed threshold options.

These alternatives offer similar functionality and can be evaluated based on specific application requirements.

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