DS1811-5

Product Overview

Category: Integrated Circuits (ICs)

Use: The DS1811-5 is a voltage supervisor IC primarily used for monitoring power supply voltages in electronic systems. It ensures proper system operation by generating a reset signal when the monitored voltage falls below a predefined threshold.

Characteristics: - Low-power consumption - Wide operating voltage range - Adjustable reset threshold - Small form factor - High accuracy

Package: The DS1811-5 is available in a compact 8-pin SOIC package, which provides ease of integration into various electronic designs.

Essence: The essence of the DS1811-5 lies in its ability to monitor and control power supply voltages, ensuring stable and reliable operation of electronic systems.

Packaging/Quantity: The DS1811-5 is typically sold in reels containing 250 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Reset Threshold Voltage: Adjustable from 1.6V to VCC - 0.2V
• Reset Timeout Period: Fixed at 140ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)
• Output Type: Active-Low Push-Pull

Detailed Pin Configuration

The DS1811-5 features the following pin configuration:

1. GND: Ground connection
2. RESET: Active-low reset output
3. MR: Manual reset input
4. VCC: Positive supply voltage
5. GND: Ground connection
6. GND: Ground connection
7. TH: Threshold adjust input
8. NC: No connect

Functional Features

• Voltage Monitoring: The DS1811-5 continuously monitors the input voltage and compares it with the user-adjustable threshold voltage.
• Reset Generation: When the monitored voltage falls below the threshold, the DS1811-5 generates an active-low reset signal to initiate system reset or shutdown.
• Manual Reset: The MR pin allows for manual reset control, enabling immediate system restart if required.
• Adjustable Threshold: The TH pin provides the ability to adjust the reset threshold voltage according to specific system requirements.

Advantages and Disadvantages

Advantages: - Low power consumption ensures minimal impact on overall system energy efficiency. - Wide operating voltage range allows compatibility with various power supply configurations. - Adjustable reset threshold offers flexibility in adapting to different voltage levels. - Small form factor facilitates space-constrained designs. - High accuracy ensures reliable voltage monitoring.

Disadvantages: - Fixed reset timeout period may not be suitable for all applications requiring longer or shorter timeouts. - Lack of additional features such as hysteresis adjustment limits customization options.

Working Principles

The DS1811-5 operates by comparing the input voltage with the user-defined threshold voltage. If the input voltage drops below the threshold, the IC triggers a reset signal. This signal can be used to initiate system reset or shutdown, ensuring proper operation even under abnormal voltage conditions.

Detailed Application Field Plans

The DS1811-5 finds application in various electronic systems where voltage monitoring and reset functionality are critical. Some potential application fields include: - Microcontrollers and microprocessors - Embedded systems - Power management units - Industrial automation - Automotive electronics

Detailed and Complete Alternative Models

1. DS1811R-5: Similar to DS1811-5 but with an active-high reset output.
2. MAX811: Voltage supervisor IC with adjustable reset threshold and various package options.
3. TPS3808: Precision voltage supervisor with programmable delay time and wide supply voltage range.

These alternative models offer similar functionality and can be considered based on specific design requirements.

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