Maxim Integrated
La imagen puede ser una representación.
Consulte las especificaciones para obtener detalles del producto.
MAX844ISA+T
Ver Detalle Hojas de datos

MAX844ISA+T

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Supervisor
  • Characteristics: Low-power, precision voltage monitor
  • Package: 8-pin SOIC (Small Outline Integrated Circuit)
  • Essence: Provides accurate monitoring and reset generation for microprocessors and other digital systems
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 1.2V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Threshold Voltage Options: 2.5V, 3.0V, 3.3V, 5.0V
  • Reset Timeout Period: Adjustable or Fixed (140ms, 280ms, 560ms, 1120ms)
  • Quiescent Current: 7µA (typical)

Pin Configuration

The MAX844ISA+T has the following pin configuration:

  1. GND (Ground)
  2. RESET (Reset Output)
  3. MR (Manual Reset Input)
  4. VCC (Supply Voltage)
  5. TH (Threshold Voltage Selection)
  6. CT (Reset Timeout Selection)
  7. NC (No Connection)
  8. RESET (Reset Output)

Functional Features

  • Accurate voltage monitoring with adjustable or fixed threshold options
  • Manual reset input for immediate system reset
  • Reset timeout period selection for customized system behavior
  • Low quiescent current for power-sensitive applications
  • Open-drain reset output for easy interfacing with microcontrollers

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems - Precise voltage monitoring ensures reliable system operation - Adjustable/reset timeout period offers flexibility in system design - Low quiescent current minimizes power consumption

Disadvantages: - Limited number of threshold voltage options - No internal pull-up resistor on the manual reset input

Working Principles

The MAX844ISA+T is designed to monitor the supply voltage of a digital system. It compares the monitored voltage with a user-defined threshold voltage. If the supply voltage falls below the threshold, the reset output is asserted, indicating a power failure or an out-of-range condition. The reset output remains active until the supply voltage rises above the threshold and the reset timeout period elapses.

Detailed Application Field Plans

The MAX844ISA+T can be used in various applications, including: 1. Microprocessor-based systems 2. Embedded systems 3. Industrial control systems 4. Battery-powered devices 5. Portable electronics 6. Automotive electronics

Detailed and Complete Alternative Models

  1. MAX809: Voltage supervisor with fixed threshold options and adjustable/reset timeout period.
  2. MAX811: Voltage supervisor with fixed threshold options and fixed reset timeout period.
  3. MAX803: Voltage supervisor with fixed threshold options and push-pull reset output.

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

Word count: 275 words

Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de MAX844ISA+T en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of MAX844ISA+T in technical solutions:

  1. Q: What is the MAX844ISA+T? A: The MAX844ISA+T is a voltage detector IC manufactured by Maxim Integrated. It is commonly used for monitoring power supply voltages in various electronic systems.

  2. Q: What is the operating voltage range of MAX844ISA+T? A: The operating voltage range of MAX844ISA+T is typically between 1.8V and 5.5V.

  3. Q: How does the MAX844ISA+T detect voltage levels? A: The MAX844ISA+T uses an internal voltage reference and a comparator to compare the input voltage with a preset threshold. When the input voltage crosses this threshold, the output of the IC changes state.

  4. Q: Can the MAX844ISA+T be used to monitor multiple voltage levels simultaneously? A: Yes, the MAX844ISA+T has multiple voltage detection inputs, allowing it to monitor multiple voltage levels independently.

  5. Q: What is the typical accuracy of voltage detection provided by MAX844ISA+T? A: The typical accuracy of voltage detection provided by MAX844ISA+T is around ±1.5%.

  6. Q: Can the MAX844ISA+T generate an interrupt signal upon voltage detection? A: Yes, the MAX844ISA+T has an open-drain output that can be configured to generate an interrupt signal when the voltage crosses the detection threshold.

  7. Q: Is the MAX844ISA+T suitable for battery-powered applications? A: Yes, the MAX844ISA+T is designed to operate in low-power applications and is well-suited for battery-powered devices.

  8. Q: What is the typical response time of the MAX844ISA+T? A: The typical response time of the MAX844ISA+T is around 20µs, allowing for fast detection of voltage changes.

  9. Q: Can the MAX844ISA+T be used in automotive applications? A: Yes, the MAX844ISA+T is automotive-grade and can be used in various automotive applications that require voltage monitoring.

  10. Q: Are there any specific precautions to consider when using the MAX844ISA+T? A: It is important to ensure proper decoupling and filtering of the power supply inputs to minimize noise interference. Additionally, attention should be given to the maximum input voltage rating specified in the datasheet to prevent damage to the IC.

Please note that these answers are general and may vary depending on the specific application and requirements. Always refer to the datasheet and consult with the manufacturer for accurate information.