The Rochester Electronics 74ACTQ245QSC-G is a high-speed, low-power octal transceiver designed for use in various digital applications. This device is part of the 74ACT family of logic devices, which are known for their advanced CMOS technology, providing high-speed operation while maintaining low power consumption. The 74ACTQ245QSC-G is particularly useful in applications requiring bidirectional data transfer between two buses.

## Overview

The 74ACTQ245QSC-G is an octal transceiver with 3-state outputs, meaning it can drive data onto a bus or receive data from a bus. It features a dual supply voltage capability, allowing it to interface with different logic levels. This makes it suitable for interfacing between 5V and 3.3V systems, which is common in modern electronic designs.

## Key Features

1. Bidirectional Data Transfer: The device supports bidirectional data flow, allowing data to be transmitted and received on the same pins, which is essential for many communication protocols.

2. 3-State Outputs: The outputs can be placed in a high-impedance state, allowing multiple devices to share the same bus without interference.

3. Wide Supply Voltage Range: The 74ACTQ245QSC-G operates with a supply voltage range of 4.5V to 5.5V, making it compatible with various logic levels.

4. High-Speed Operation: With a maximum propagation delay of 5 ns at 5V, the device is suitable for high-speed applications, ensuring quick data transfer.

5. Low Power Consumption: The device is designed to consume minimal power, making it ideal for battery-operated devices and energy-efficient applications.

6. TTL Compatible: The 74ACT series is compatible with TTL (Transistor-Transistor Logic) levels, allowing it to interface seamlessly with other TTL devices.

## Specifications

Here are the detailed specifications for the Rochester Electronics 74ACTQ245QSC-G:

- Part Number: 74ACTQ245QSC-G
- Type: Octal Transceiver
- Package: SOIC-20 (Small Outline Integrated Circuit)
- Number of Channels: 8
- Supply Voltage (V_CC): 4.5V to 5.5V
- Input Voltage Levels:
- V_IL (Maximum Input Low Voltage): 0.8V
- V_IH (Minimum Input High Voltage): 2.0V
- Output Voltage Levels:
- V_OL (Maximum Output Low Voltage): 0.4V at 24mA
- V_OH (Minimum Output High Voltage): 4.2V at -24mA
- Propagation Delay (t_PD):
- 5 ns (typical) at V_CC = 5V
- Power Dissipation:
- 0.5 mA (maximum) at V_CC = 5V
- Operating Temperature Range: -40°C to +85°C
- Input Capacitance: 5 pF (typical)
- Output Capacitance: 10 pF (typical)

## Applications

The 74ACTQ245QSC-G is suitable for a wide range of applications, including:

- Data Bus Interfaces: It can be used to connect different data buses in a system, facilitating communication between various components.
- Level Shifting: The device can be employed to shift voltage levels between different logic families, making it ideal for mixed-voltage systems.
- Microcontroller Interfaces: It is commonly used to interface microcontrollers with peripheral devices, ensuring reliable data transfer.
- Communication Systems: The transceiver is suitable for use in communication protocols where bidirectional data flow is required.

## Conclusion

The Rochester Electronics 74ACTQ245QSC-G is a highly versatile octal transceiver that offers excellent performance in a compact package. Its ability to support bidirectional data transfer, combined with its high-speed operation and low power consumption, makes it an ideal choice for a variety of digital applications. Whether used in data bus interfaces, level shifting, or microcontroller communication, the 74ACTQ245QSC-G is a reliable component that meets the demands of modern electronic designs.