Asia-Pacific
English
简体中文
繁體中文
한국어
日本語
Americas
English
Europe (EMEA)
English



Part Number Search

Cross Reference Search

About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

Keyword Search

Parametric Search

Stock Check & Purchase

Innovation Centre

At the Toshiba Innovation Centre we constantly strive to inspire you with our technologies and solutions. Discover how to place us at the heart of your innovations.

Combinational Logic: Bidirectional Bus Buffers

Example of application of a bidirectional bus buffer
Example of application of a bidirectional bus buffer

Bidirectional bus buffers (transceivers)
Example: 74VHC245

A bidirectional bus buffer (transceiver) is a type of logic circuit whose I/O pins can be configured as input and output to receive and transmit data.
Since a transceiver allows the signal direction to be changed via a control signal (DIR), it is used along a bus line through which data are transferred bidirectionally.
The following shows an example of application of a transceiver.
When using bus signals bi-directionally, connect both the bus input and bus output to VCC or GND via a pull-up resistor to prevent the input signal from becoming open (undefined) when the signal is switched by the control signal (DIR).
Please be careful not to short-circuit the output with the output of the bus line when switching signals.

Combinational Logic: Bidirectional bus buffers

The direction of the A and B pins can be changed easily by changing the value of DIR while /G is High.

Change the value of DIR and the direction of external data while /G is High.
During period #0, data are transferred from B to A.
During period #1, the A pin assumes the High-Z state. Therefore, output data are invalid.
During period #2, change the value of DIR and the direction of external data.
During period #3, enable the A and B pins. Then, output data stabilize at the beginning of period #4.
During period #4, data are transferred from A to B.

Chapter3 Basic CMOS Logic ICs

Basic CMOS Logic ICs
Combinational Logic: Inverters and Buffers
Combinational Logic: Schmitt-Trigger Devices
Combinational Logic: Decoders
Combinational Logic: Multiplexers
Combinational Logic: Analog Multiplexer/Demultiplexers
Combinational Logic: Analog Switches
Sequential Logic: Latches
Sequential Logic: Flip-Flops
Sequential Logic: Counters
Sequential Logic: Shift Registers

Products

Related information