74HC258DB,118

The 74HC258DB,118 is a widely used 3-state non-inverting octal bus transceiver and tri-state buffer. It belongs to the type of logic - signal switches, multiplexers and decoders.

The transceiver features a high-speed 3- to 8-line bidirectional universal bus transceiver and four tri-state buffers. It has been designed for easy expansion of the user’s logic system or the interface between two different buses.

It is fabricated using an advanced low-power CMOS technology to realize high speed and low power consumption operation.

The transceiver provides communication between buses. It also provides bus isolation and allows the user to control the direction of data flow through the control of an external input.

The 74HC258DB,118 is an octal tristate non-inverting buffer and has the following features:

• Diffused base bipolar transistors
• High current drive capability (max 4 mA per output)
• High noise immunity
• High speed (typ. 20 MHz)
• Low power consumption

The transceiver is an integral part of various electronic applications such as data bus repeaters, bus transceivers, interface barriers, I/O expanders and so on.

In addition, it provides current level conversions between TTL and MOS/CMOS buses. It also allows the user to control the direction of the data flow through the control of an external input.

Basically, this device can be used for bidirectional data exchange. The output enable input, which is OE, enables two different transceivers to share a common bus in each direction.

The 74HC258DB,118 is compatible with all common logic families. It is also compatible with TTL and CMOS logic.

Another useful application of this device is in the monitoring of bus contention and bus arbitration. It can be used to avoid any data collisions while accessing the system bus in multiple processors.

The working principle of the 74HC258DB,118 is simple. It features an 8-bit non-inverting register which is controlled by an enable pin.

The enable pin allows the user to control the function of the device. When the enable pin is in the low state, the device is disabled. On the other hand, when the enable pin is in the high state, the device works as an 8-bit non-inverting register.

The enable pin on the 74HC258DB,118 is used to control the data flow. When the enable pin is in the low state, the device is disabled and only the high impedance state is present.

When the enable pin goes to the high state, the device works as an 8-bit non-inverting register. The data present on the Data bus is then buffered at the outputs.

The 74HC258DB,118 is an easy to use, low power consuming and versatile device. It is a perfect choice for all kinds of applications especially those requiring bus communication and bus buffering.

It provides a high level of noise immunity, current level conversions and it allows for bidirectional data exchange. It is also compatible with all common logic families and its enable pin allows it to be easily and conveniently used in various applications.