Encyclopedia Entry: 74ACTQ245SC

Product Overview

Category

The 74ACTQ245SC belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for bidirectional level shifting and voltage translation applications.

Characteristics

• The 74ACTQ245SC is a high-speed, low-power octal bus transceiver.
• It operates at a voltage range of 4.5V to 5.5V.
• This IC features eight bidirectional buffers with separate input and output ports.
• It offers non-inverting outputs for both send and receive functions.
• The device is designed to handle both TTL and CMOS voltage levels.

Package

The 74ACTQ245SC is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of this IC lies in its ability to facilitate bidirectional communication between two buses operating at different voltage levels.

Packaging/Quantity

The 74ACTQ245SC is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (max)
• Output Current: ±24mA

Detailed Pin Configuration

The 74ACTQ245SC has a total of 20 pins, which are assigned specific functions as follows:

1. OE (Output Enable)
2. A1 (Data Input/Output)
3. B1 (Data Input/Output)
4. A2 (Data Input/Output)
5. B2 (Data Input/Output)
6. A3 (Data Input/Output)
7. B3 (Data Input/Output)
8. A4 (Data Input/Output)
9. B4 (Data Input/Output)
10. GND (Ground)
11. B5 (Data Input/Output)
12. A5 (Data Input/Output)
13. B6 (Data Input/Output)
14. A6 (Data Input/Output)
15. B7 (Data Input/Output)
16. A7 (Data Input/Output)
17. B8 (Data Input/Output)
18. A8 (Data Input/Output)
19. VCC (Supply Voltage)
20. DIR (Direction Control)

Functional Features

• Bidirectional voltage translation between two buses operating at different voltage levels.
• Non-inverting outputs for both send and receive functions.
• High-speed operation with low propagation delay.
• Wide supply voltage range compatibility.
• TTL and CMOS voltage level compatibility.

Advantages and Disadvantages

Advantages

• Facilitates seamless communication between buses with different voltage levels.
• Provides non-inverting outputs, simplifying signal processing.
• Offers high-speed operation, reducing latency in data transmission.
• Compatible with a wide range of supply voltages.
• Supports both TTL and CMOS voltage levels.

Disadvantages

• May require additional external components for specific applications.
• Limited to bidirectional level shifting and voltage translation tasks.

Working Principles

The 74ACTQ245SC operates by receiving input signals from one bus and transmitting them to another bus, while ensuring compatibility between the voltage levels of the two buses. The direction of data flow is controlled by the DIR pin. When the DIR pin is set to logic HIGH, data flows from the A bus to the B bus, and when it is set to logic LOW, data flows from the B bus to the A bus.

Detailed Application Field Plans

The 74ACTQ245SC finds applications in various fields, including:

1. Microcontroller interfacing: It enables communication between microcontrollers operating at different voltage levels.
2. Industrial automation: Facilitates bidirectional data transfer between control systems and sensors/actuators.
3. Communication systems: Used for level shifting in serial communication interfaces like UART, SPI, and I2C.
4. Automotive electronics: Enables voltage translation between different subsystems within a vehicle.

Detailed and Complete Alternative Models

Some alternative models that provide similar functionality to the 74ACTQ245SC include:

1. SN74LVC245A: Low-voltage CMOS octal bus transceiver.
2. CD4050B: Hex non-inverting buffer/converter.
3. TXS0108EPWR: 8-bit bidirectional voltage-level translator.

These alternatives can be considered based on specific application requirements and compatibility with existing systems.

In conclusion, the 74ACTQ245SC is a versatile integrated circuit used for bidirectional level shifting and voltage translation tasks. Its high-speed operation, wide voltage range compatibility, and non-inverting outputs make it suitable for various applications in