DS1818R-10

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DS1818R-10

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Supervisory Circuits

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概述

Description

The DS1818R-10 is a microprocessor supervisory circuit designed by Dallas Semiconductor (now part of Maxim Integrated) to monitor power supply levels in electronic systems. This component is crucial in applications that require reliable microprocessor operation by ensuring that systems remain in a reset state during power-up, power-down, or when the power supply voltage levels fall below acceptable limits.
Key features of the DS1818R-10 include:
1. Reset Functionality: It provides an active-low reset output that remains asserted when the power supply voltage is below a specified threshold, ensuring the microprocessor does not execute faulty code.
2. Voltage Monitoring: It monitors the power supply voltage and triggers a reset when the voltage falls below 4.375V (for the DS1818R-10 variant).
3. Manual Reset Input: Allows external control to force a reset condition.
4. Small Footprint: Available in a compact 3-pin TO-92 or SOT-23 package, making it easy to integrate into space-constrained designs.
5. Low Power Consumption: Designed for energy efficiency, making it suitable for battery-powered applications.
Overall, the DS1818R-10 ensures system reliability by preventing erratic microprocessor operation during power fluctuations.

Equivalent

The DS1818R-10 is a 3.3V voltage supervisor IC with a push-pull active-low reset output. Equivalent products may include the MAX811/812 from Maxim Integrated, the MCP130 series from Microchip Technology, and the TLV809 from Texas Instruments. These alternatives provide similar functions of monitoring voltage levels and generating reset signals, but it's important to compare specific parameters such as threshold voltage, reset timeout, and packaging to ensure compatibility with your application.

Features

The DS1818R-10 is a precision battery monitor IC designed by Dallas Semiconductor, now Maxim Integrated. Key features include:
1. Battery Monitoring: It provides accurate monitoring of battery voltage, ensuring reliable performance in battery-powered systems.
2. Reset Functionality: The IC has a built-in reset function that can detect low battery conditions and generate a reset signal to protect the system.
3. Low Power Consumption: Designed for efficiency, it consumes minimal power, making it suitable for long-term battery applications.
4. Temperature Compensation: The device includes temperature compensation features to provide accurate monitoring across varying temperature ranges.
5. Small Form Factor: The DS1818R-10 is compact, allowing for integration into various electronic devices without taking up much space.
6. Wide Operating Voltage Range: It supports a broad range of input voltages, enhancing its versatility across different applications.
7. Ease of Use: The IC is straightforward to implement, with minimal external components required for operation.
These features make the DS1818R-10 ideal for applications requiring reliable battery monitoring and system reset functions.

Pinout

The DS1818R-10 is a 3-pin microprocessor reset chip. It is designed to monitor the supply voltage of a microprocessor (µP) and reset the µP when the voltage falls below a specified threshold. The DS1818R-10 ensures the microprocessor is in a known state when power is applied, preventing unpredictable behavior during power-up, power-down, or brownout conditions.
Here are the pin functions:
1. GND (Pin 1): Ground reference for the device.
2. RST (Pin 2): Active-low reset output. This pin goes low when the monitored voltage drops below the threshold and remains low for a specified time interval after the voltage returns above the threshold, ensuring the microprocessor restarts in a controlled manner.
3. VCC (Pin 3): Supply voltage input monitored by the DS1818R-10.
The DS1818R-10 typically operates with a reset threshold voltage of 4.4V, suitable for systems with a nominal 5V supply.

Manufacturer

The DS1818R-10 is manufactured by Analog Devices, which is a multinational semiconductor company. Analog Devices specializes in designing and manufacturing a wide range of semiconductor products, including analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company serves various industries, such as industrial, automotive, communications, healthcare, and consumer electronics. Known for its high-performance products, Analog Devices focuses on delivering solutions that enhance signal processing, data conversion, and power management in electronic devices.

Application

The DS1818R-10 is a microprocessor supervisory circuit designed to monitor power supplies in electronic systems. Its primary application areas include:
1. Embedded Systems: Ensures reliable operation by monitoring voltage levels and providing reset control.
2. Consumer Electronics: Protects devices like televisions, gaming consoles, and home automation systems from power fluctuations.
3. Industrial Equipment: Used in control systems and machinery to maintain stable operation.
4. Networking Devices: In routers and switches, it helps prevent unexpected shutdowns.
5. Automotive Electronics: Monitors power in ECUs and infotainment systems to ensure consistent performance.
These applications leverage its ability to reset microprocessors during power irregularities.

Package

The DS1818R-10 is a microprocessor supervisory circuit with a reset function. It typically comes in a small-outline package, such as the 3-pin TO-92, which is commonly used for such components.