MC1489APG

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-232 Line Driver/Receiver
• Characteristics:
  • High-speed communication interface
  • Converts TTL/CMOS logic levels to RS-232 voltage levels
  • Suitable for long-distance data transmission
• Package: DIP-14 (Dual In-Line Package)
• Essence: The MC1489APG is a quad line driver/receiver IC designed for RS-232 communication.
• Packaging/Quantity: Available in tubes of 25 units.

Specifications

• Supply Voltage Range: +4.5V to +5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Rate: Up to 120 kbps
• Number of Channels: 4
• Input Logic Levels: TTL/CMOS compatible
• Output Voltage Swing: ±5V
• Input Resistance: 3 kΩ
• Output Resistance: 300 Ω
• Propagation Delay Time: 0.5 µs (typical)

Pin Configuration

The MC1489APG has a total of 14 pins, which are assigned as follows:

1. Channel 1 Input (A)
2. Channel 1 Output (Y)
3. Channel 1 Ground (GND)
4. Channel 2 Input (B)
5. Channel 2 Output (Z)
6. Channel 2 Ground (GND)
7. Channel 3 Input (C)
8. Channel 3 Output (AA)
9. Channel 3 Ground (GND)
10. Channel 4 Input (D)
11. Channel 4 Output (BB)
12. Channel 4 Ground (GND)
13. VCC (+5V Power Supply)
14. VEE (-5V Power Supply)

Functional Features

• Converts TTL/CMOS logic levels to RS-232 voltage levels for reliable long-distance communication.
• Provides four independent channels for simultaneous data transmission and reception.
• High-speed operation allows data rates of up to 120 kbps.
• Wide supply voltage range ensures compatibility with various systems.
• Robust design enables reliable performance in harsh environments.

Advantages and Disadvantages

Advantages: - Supports bidirectional communication. - Low power consumption. - Compact DIP-14 package for easy integration. - Suitable for industrial applications.

Disadvantages: - Requires external power supplies (+5V and -5V). - Limited number of channels (4).

Working Principles

The MC1489APG operates by converting TTL/CMOS logic levels to RS-232 voltage levels. It uses internal circuitry to generate the necessary voltage swings required for RS-232 communication. The IC provides four independent channels, each capable of transmitting and receiving data simultaneously. By converting the logic levels, it ensures reliable data transmission over long distances.

Detailed Application Field Plans

The MC1489APG is widely used in various applications that require RS-232 communication. Some common application fields include:

1. Industrial Automation: Used in PLCs (Programmable Logic Controllers), SCADA (Supervisory Control and Data Acquisition) systems, and other industrial control equipment.
2. Telecommunications: Employed in modems, routers, and other networking devices for serial communication.
3. Computer Peripherals: Integrated into printers, barcode scanners, and other peripherals that utilize RS-232 interfaces.
4. Test and Measurement Equipment: Utilized in oscilloscopes, data loggers, and other instruments requiring long-distance data transmission.

Detailed and Complete Alternative Models

1. MAX232: Another popular RS-232 line driver/receiver IC with similar functionality.
2. MAX3232: Provides RS-232 communication using a single +3.3V power supply.
3. SP3232: Low-power RS-232 transceiver with enhanced ESD protection.

These alternative models offer similar features and can be used as replacements for the MC1489APG in various applications.

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