MAX634CPA+ - English Editing Encyclopedia Entry

Product Overview

Category

MAX634CPA+ belongs to the category of integrated circuits (ICs).

Use

The MAX634CPA+ is primarily used as a voltage reference and supervisory circuit.

Characteristics

• Voltage reference accuracy: ±1%
• Supply voltage range: 3.6V to 16V
• Operating temperature range: -40°C to +85°C
• Low quiescent current: 15µA (typical)
• Adjustable reset threshold voltage
• Open-drain reset output
• Power-on reset delay time: 100ms (typical)

Package

The MAX634CPA+ is available in an 8-pin PDIP (Plastic Dual In-Line Package) package.

Essence

The essence of MAX634CPA+ lies in its ability to provide accurate voltage reference and supervisory functions, ensuring proper operation of electronic systems.

Packaging/Quantity

The MAX634CPA+ is typically packaged in tubes or reels, with a quantity of 25 pieces per tube/reel.

Specifications

• Reference Voltage: 2.5V
• Output Current: 10mA
• Quiescent Current: 15µA (typical)
• Reset Threshold Voltage Range: 1.2V to VREF
• Reset Timeout Period: 140ms (typical)
• Power Supply Rejection Ratio: 60dB (typical)
• Temperature Coefficient: 50ppm/°C (typical)

Detailed Pin Configuration

The MAX634CPA+ has the following pin configuration:

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

Functional Features

1. Voltage Reference: The MAX634CPA+ provides a stable and accurate 2.5V reference voltage.
2. Supervisory Circuit: It monitors the supply voltage and generates a reset signal when the voltage falls below a certain threshold.
3. Adjustable Reset Threshold: The reset threshold voltage can be adjusted using the TH pin.
4. Open-Drain Reset Output: The RESET pin provides an open-drain output for easy interfacing with other devices.
5. Power-On Reset Delay: The MAX634CPA+ ensures a delay of approximately 100ms before generating a reset signal during power-up.

Advantages and Disadvantages

Advantages

• Accurate voltage reference
• Low quiescent current consumption
• Adjustable reset threshold
• Open-drain reset output for compatibility
• Power-on reset delay for reliable operation

Disadvantages

• Limited output current capability (10mA)
• Restricted operating temperature range (-40°C to +85°C)

Working Principles

The MAX634CPA+ operates by comparing the supply voltage with a fixed reference voltage. When the supply voltage drops below the adjustable threshold voltage, the reset output is activated. This ensures that the connected system is properly reset and prevents erratic behavior due to insufficient voltage.

Detailed Application Field Plans

The MAX634CPA+ finds applications in various fields, including: 1. Power supply monitoring in industrial control systems 2. Microcontroller-based systems requiring reliable reset functionality 3. Battery-powered devices where low quiescent current is crucial 4. Automotive electronics for voltage supervision and reset generation 5. Embedded systems requiring accurate voltage references

Detailed and Complete Alternative Models

Some alternative models to the MAX634CPA+ include: 1. MAX635CPA+: Similar features but with a fixed reset threshold voltage of 4.63V. 2. MAX636CPA+: Provides adjustable reset threshold and additional watchdog timer functionality. 3. MAX638CPA+: Offers higher output current capability (50mA) and adjustable reset timeout period.

In conclusion, the MAX634CPA+ is a versatile integrated circuit that combines voltage reference and supervisory functions. Its accurate performance, low power consumption, and adjustable features make it suitable for various applications in different industries.