The 74LS245 is a part of the 74XXYY IC series. The SN54/74LS245 is an Octal Bus Transmitter/Receiver designed for 8-line asynchronous 2-way data communication between data buses. Direction Input (DR) controls the transmission of Data from bus A to bus B or bus B to bus A depending upon its logic level. The Enable input (E) can be used to isolate the buses.

• Hysteresis Inputs to Improve Noise Immunity
• 2-Way Asynchronous Data Bus Communication
• Input Diodes Limit High-Speed Termination Effects
• ESD > 3500 Volts

What is a Bus Transceiver?

Bus transceivers are electronic tri-state bi-directional devices that allow the flow of data between two points making them compatible with bus-oriented systems or the bi-directional (input or output) control of interface circuitry. A Bus transceiver can be inverting or non-inverting, common examples are 74LS243 & LS242 IC series. Bus transceivers are designed for asynchronous two-way communication between two data buses or input/output devices. The transceiver allows for the transmission of data from the terminals A to terminals B or the reverse depending on the logic level at the direction-control input.

74LS245 Pinout:

74LS245 Pin Configuration

74LS245 Features & Specifications

• Technology Family: LS
• VCC (Min): 4.75V
• VCC (Max): 5.25V
• Bits (#): 8
• Voltage at nominal operation: 5V
• Frequency at normal voltage (Max): 35MHz
• ICC at normal voltage (Max): 0.09mA
• Propagation delay (Max): 8ns – 12ns
• 3-State Outputs to Drive Bus Lines Directly
• PNP Inputs Reduce DC Loading on Bus Lines
• Hysteresis at Bus Inputs Improves Noise Margins
• IOL (Max): 24mA
• IOH (Max): -15mA Rating: Catalog
• Operating temperature range: 0°C to 70°C

Applications

• Building Automation
• Electronic Point of Sale
• Factory Automation and Control
• Test and Measurement protocols

You can download this datasheet for 74LS245 Octal Bus Transceivers IC from here