ST232BD

Product Overview

Category

ST232BD belongs to the category of integrated circuits (ICs) used for serial communication.

Use

It is primarily used for converting signals between RS-232 and TTL voltage levels, enabling communication between devices operating at different voltage levels.

Characteristics

• Converts RS-232 voltage levels (-15V to +15V) to TTL voltage levels (0V to 5V)
• Supports data rates up to 120 kbps
• Operates with a single power supply in the range of 3V to 5.5V
• Provides two bidirectional channels for full-duplex communication
• Offers protection against electrostatic discharge (ESD)

Package

ST232BD is available in a standard 16-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of ST232BD lies in its ability to facilitate communication between devices using different voltage levels, ensuring compatibility and seamless data transfer.

Packaging/Quantity

ST232BD is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 3V to 5.5V
• Data Rate: Up to 120 kbps
• Number of Channels: 2
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-16

Detailed Pin Configuration

1. VCC - Power supply voltage
2. GND - Ground reference
3. T1IN - Channel 1 TTL input
4. T1OUT - Channel 1 TTL output
5. R1OUT - Channel 1 RS-232 output
6. R1IN - Channel 1 RS-232 input
7. R2IN - Channel 2 RS-232 input
8. R2OUT - Channel 2 RS-232 output
9. T2OUT - Channel 2 TTL output
10. T2IN - Channel 2 TTL input
11. C1+ - Capacitor connection for channel 1
12. C1- - Capacitor connection for channel 1
13. C2- - Capacitor connection for channel 2
14. C2+ - Capacitor connection for channel 2
15. VCC - Power supply voltage
16. GND - Ground reference

Functional Features

• Bi-directional signal conversion between RS-232 and TTL voltage levels
• Automatic power-down mode for reduced power consumption
• Enhanced ESD protection for reliable operation in harsh environments
• Wide operating voltage range for compatibility with various systems
• Low power consumption for energy-efficient applications

Advantages and Disadvantages

Advantages

• Easy integration into existing systems due to its standard package and pin configuration
• High data rate support enables fast and efficient communication
• Robust ESD protection ensures reliability in challenging conditions
• Versatile voltage level conversion facilitates compatibility across different devices

Disadvantages

• Limited to two channels, which may not be sufficient for complex communication setups
• Requires external capacitors for proper functioning, adding to the overall component count and cost

Working Principles

ST232BD operates by utilizing internal circuitry to convert the voltage levels of incoming and outgoing signals. It employs a combination of transistors, resistors, and capacitors to achieve the desired signal conversion. The integrated design allows for seamless bidirectional communication between RS-232 and TTL devices.

Detailed Application Field Plans

ST232BD finds application in various fields where communication between devices operating at different voltage levels is required. Some common application areas include:

1. Industrial Automation: Used for connecting PLCs (Programmable Logic Controllers) to computer systems or other devices.
2. Embedded Systems: Enables communication between microcontrollers and external devices, such as sensors or displays.
3. Networking Equipment: Facilitates serial communication between routers, switches, and other network devices.
4. Test and Measurement Instruments: Allows for data exchange between instruments and computers for analysis and control.

Detailed and Complete Alternative Models

1. MAX232 - Manufactured by Maxim Integrated, it offers similar functionality to ST232BD.
2. LTC2320 - Produced by Linear Technology, it provides RS-232 to TTL voltage level conversion with enhanced features.
3. SP3232 - Offered by Exar Corporation, it is a popular alternative with robust ESD protection and high-speed capabilities.

These alternative models can be considered based on specific requirements and availability in the market.

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