MC1489AM

Product Overview

Category: Integrated Circuit (IC)

Use: The MC1489AM is a quad line receiver IC that is commonly used in electronic communication systems. It is designed to receive and convert RS-232 signals into TTL/CMOS logic levels.

Characteristics: - Quad line receiver - Converts RS-232 signals to TTL/CMOS logic levels - High input impedance - Wide operating voltage range - Low power consumption

Package: The MC1489AM is available in a 14-pin dual in-line package (DIP).

Essence: The essence of the MC1489AM lies in its ability to interface between RS-232 and TTL/CMOS logic levels, allowing for seamless communication between devices operating at different voltage levels.

Packaging/Quantity: The MC1489AM is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: +4.5V to +5.5V
• Input Voltage Range: -30V to +30V
• Input Resistance: 3kΩ (minimum)
• Output Voltage Range: 0V to Vcc
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC1489AM has a total of 14 pins, which are assigned specific functions as follows:

1. A1 - Receiver Input A
2. B1 - Receiver Input B
3. C1 - Receiver Input C
4. D1 - Receiver Input D
5. GND - Ground
6. D2 - Receiver Output D
7. C2 - Receiver Output C
8. B2 - Receiver Output B
9. A2 - Receiver Output A
10. Vcc - Power Supply
11. NC - No Connection
12. NC - No Connection
13. NC - No Connection
14. NC - No Connection

Functional Features

• Quad line receiver with independent inputs and outputs for each channel.
• Converts RS-232 signals to TTL/CMOS logic levels, allowing for seamless integration with digital circuits.
• High input impedance minimizes loading effects on the RS-232 signal source.
• Wide operating voltage range enables compatibility with various power supply configurations.
• Low power consumption makes it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Provides reliable and efficient conversion of RS-232 signals to TTL/CMOS logic levels. - Independent inputs and outputs for each channel offer flexibility in system design. - High input impedance ensures minimal signal degradation. - Wide operating voltage range allows for versatile use in different applications. - Low power consumption prolongs battery life in portable devices.

Disadvantages: - Limited to converting RS-232 signals only; not suitable for other communication protocols. - Requires external components for complete RS-232 interface implementation. - May not be compatible with all RS-232 signal sources due to variations in voltage levels and signaling standards.

Working Principles

The MC1489AM operates by receiving RS-232 signals through its input pins (A1, B1, C1, D1). These signals are then converted into TTL/CMOS logic levels and outputted through the corresponding output pins (A2, B2, C2, D2). The high input impedance of the IC ensures that the RS-232 signal source is minimally loaded, preserving signal integrity. The wide operating voltage range allows the IC to function reliably across different power supply configurations.

Detailed Application Field Plans

The MC1489AM finds extensive application in various fields, including:

1. Industrial Automation: Used in industrial control systems to interface between RS-232 devices and digital control circuits.
2. Telecommunications: Enables communication between RS-232-based telecommunication equipment and digital processing units.
3. Computer Peripherals: Facilitates the connection of RS-232 peripherals, such as modems and serial printers, to computer systems.
4. Embedded Systems: Integrates RS-232 communication capabilities into embedded systems for data exchange with external devices.

Detailed and Complete Alternative Models

1. MAX1489: Similar to MC1489AM, this quad line receiver IC offers RS-232 to TTL/CMOS logic level conversion with additional features like enhanced ESD protection.
2. SN75189: Another quad line receiver IC that provides RS-232 to TTL/CMOS logic level conversion, suitable for applications requiring extended temperature range operation.
3. LTC1489: This quad line receiver IC offers RS-232 to TTL/CMOS logic level conversion with low power consumption and high-speed operation.

These alternative models provide similar functionality to the MC1489AM and can be considered as alternatives based on specific application requirements.

Word count: 590 words