MC1489AP

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-232 Line Driver/Receiver
• Characteristics: Low-power, high-speed, quad line driver/receiver
• Package: DIP (Dual In-line Package)
• Essence: Converts TTL/CMOS logic levels to RS-232 voltage levels and vice versa
• Packaging/Quantity: Available in tubes or tape and reel packaging, quantity varies

Specifications

• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Rate: Up to 120 kbps
• Number of Channels: 4
• Input Threshold Voltage: ±0.3V
• Output Voltage Swing: ±5V
• Propagation Delay Time: 250 ns (max)

Detailed Pin Configuration

The MC1489AP IC has a total of 16 pins. The pin configuration is as follows:

1. VCC - Supply Voltage
2. A - Channel A Input
3. B - Channel B Input
4. C - Channel C Input
5. D - Channel D Input
6. GND - Ground
7. Y - Channel A Output
8. Z - Channel B Output
9. AA - Channel C Output
10. BB - Channel D Output
11. NC - No Connection
12. NC - No Connection
13. NC - No Connection
14. NC - No Connection
15. NC - No Connection
16. NC - No Connection

Functional Features

• Converts TTL/CMOS logic levels to RS-232 voltage levels and vice versa
• Provides EIA/TIA-232E and CCITT V.28 compatibility
• Operates with single power supply
• Low-power consumption
• High-speed data transmission
• Suitable for long-distance communication

Advantages and Disadvantages

Advantages: - Easy integration with TTL/CMOS logic circuits - Wide operating temperature range - Multiple channels for simultaneous data transmission - Low power consumption

Disadvantages: - Limited data rate compared to newer ICs - Requires external capacitors for proper operation - Not suitable for high-speed applications

Working Principles

The MC1489AP is a quad line driver/receiver IC designed to interface between TTL/CMOS logic circuits and RS-232 voltage levels. It utilizes internal charge pump circuitry to generate the required RS-232 voltage levels from a single power supply.

When receiving data, the IC detects the RS-232 voltage levels and converts them into TTL/CMOS logic levels. Similarly, when transmitting data, it converts the TTL/CMOS logic levels into RS-232 voltage levels for proper communication with RS-232 devices.

Detailed Application Field Plans

The MC1489AP is commonly used in various applications that require the conversion of TTL/CMOS logic levels to RS-232 voltage levels. Some of the typical application fields include:

1. Serial communication interfaces
2. Industrial automation systems
3. Data acquisition systems
4. Embedded systems
5. Telecommunication equipment
6. Networking devices

Detailed and Complete Alternative Models

1. MAX232 - Similar functionality, higher data rate, smaller package size
2. MAX3232 - Enhanced ESD protection, lower power consumption
3. SP3232 - Higher data rate, wider supply voltage range
4. LTC1480 - Low power, low voltage operation, higher data rate

These alternative models offer similar functionality to the MC1489AP but may have additional features or improved specifications.

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