SN74LVCH245APW

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The SN74LVCH245APW is a part of the LVCH family of logic-buffers, drivers, receivers, transceivers. It is a non-inverting octal bus transceiver which operates at high speed and supports 8-bit data transmission. The chip comes in a 20-pin SOIC package and is designed to meet the lowest power dissipation and highest-speed requirements of portable, battery-powered applications.

The device has two separate buses, A and B, each with four data lines and two separate control signals—sole, enable A, and enable B. The SN74LVCH245APW is used for bus switching with bidirectional data flow capability. The output enable (OE) on each of the output ports can be used to drive the low-level inputs and the high-level inputs in either direction. This allows multiple traditional I/O ports to be connected as bidirectional buses.

The SN74LVCH245APW features increased switching speed over similar octal bus transceivers due to its dedicated internal output enable logic that speeds up the output enable and disable time. The device operates with up to five volt supply, so it compatible with all 5V applications. The input and output levels are compatible with both CMOS and TTL voltage levels and guarantees excellent noise in performance.

The SN74LVCH245APW exchanges four bits, A0 to A3, and B0 to B3, bidirectionally. When enable A is low, data from the A bus flows from the inputs A0 to A3 onto the outputs B0 to B3. When enable B is low, the data from the B bus flows from the outputs B0 to B3 back onto the A bus. The enable B and enable A inputs also enable the direction control and data flow of the four I/Os.

The SN74LVCH245APW is designed to meet very low power dissipation requirements of up to 1.54 mW at 3.3 V. This makes it ideal for power-sensitive portable, battery-powered applications such as personal digital assistants (PDAs) and games consoles. It can also be used in other applications, such as digital communications, audio/video systems, telecom and datacom equipment, automotive applications, and consumer electronics.

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