MC1489DR2

Overview

Category: Integrated Circuit (IC)

Use: RS-232 Line Driver/Receiver

Characteristics: - High-speed, low-power device - Designed for balanced transmission lines - Operates from a single 5V power supply - Compatible with EIA Standard RS-232C and CCITT V.28

Package: SOIC-14

Essence: The MC1489DR2 is a line driver/receiver IC used for converting TTL/CMOS logic levels to RS-232 voltage levels and vice versa. It provides the necessary electrical interface between data terminal equipment (DTE) and data communication equipment (DCE) in serial communication systems.

Packaging/Quantity: The MC1489DR2 is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 4.5V to 5.5V
• Data Rate: Up to 120 kbps
• Operating Temperature Range: -40°C to +85°C
• Input/Output Logic Levels: TTL/CMOS compatible
• Number of Channels: 4

Pin Configuration

The MC1489DR2 has a total of 14 pins arranged as follows:

```

---

| | --|1 14|-- VCC --|2 13|-- Channel 4 Output --|3 12|-- Channel 4 Input --|4 11|-- Channel 3 Output --|5 10|-- Channel 3 Input --|6 9|-- Channel 2 Output --|7 8|-- Channel 2 Input |_________| ```

Functional Features

• Converts TTL/CMOS logic levels to RS-232 voltage levels and vice versa
• Provides balanced transmission line interface
• Supports full-duplex communication
• Built-in protection against electrostatic discharge (ESD)
• Low power consumption

Advantages and Disadvantages

Advantages: - High-speed operation - Wide operating temperature range - Small form factor - Easy to integrate into existing systems - Reliable performance

Disadvantages: - Limited number of channels (4) - Requires external components for complete RS-232 interface implementation

Working Principles

The MC1489DR2 operates by converting TTL/CMOS logic levels to RS-232 voltage levels using internal circuitry. It provides a balanced transmission line interface, ensuring reliable data transmission over long distances. The IC also incorporates protection against ESD, safeguarding the device from potential damage.

Application Field Plans

The MC1489DR2 is commonly used in various applications, including: 1. Serial communication interfaces in computer systems 2. Industrial automation and control systems 3. Telecommunication equipment 4. Data acquisition systems 5. Embedded systems

Alternative Models

Some alternative models that can be considered as alternatives to the MC1489DR2 are: 1. MAX232 - Dual RS-232 Driver/Receiver 2. SN75176 - RS-485/RS-422 Transceiver 3. LTC2874 - Quad RS-485/RS-422 Transceiver 4. ADM3251E - Isolated RS-232 Line Driver/Receiver

These alternative models offer similar functionality and can be used as replacements depending on specific requirements.

In conclusion, the MC1489DR2 is a versatile RS-232 line driver/receiver IC with high-speed operation, low power consumption, and compatibility with industry standards. Its compact size and wide operating temperature range make it suitable for various applications in the field of serial communication.