SN74LVT245BPWRE4

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Logic - Buffers, Drivers, Receivers, Transceivers

The SN74LVT245BPWRE4 is a Popular 8-bit transceiver. It is frequently used in data and address bus applications. The devices have low-voltage high-current outputs to meet the requirements of bus-oriented systems. The outputs are designed to sink up to 24 mA from the VCC supply and can source up to 24 mA from ground.

The SN74LVT245BPWRE4 is a non-inverting transceiver with direction control for both A and B buses. The device simplifies bidirectional data communication schemes, bidirectional data transmission over a single pair of wires and any other data transmission applications where direction control, data latching and handshaking are all required.

The SN74LVT245BPWRE4 provides a direction control signal which allows friendly, efficient interface between components. It also has support for 3-state in which the A and B output pins can be in the high-impedance mode thereby allowing multiple transceivers to be connected to the same bidirectional bus.

The SN74LVT245BPWRE4 has an output enable (OE )pin that controls the flow of data. When OE is high, the A outputs (and B outputs if the direction control is also high) are in the high –impedance state. When OE is low, the A outputs (and B outputs if the direction control is also low) reflect the data stored in the A register.

The A and B buses are connected in a multiplexed fashion, the A byte output being multiplexed onto the B byte pins and vice versa. Care should be taken to ensure that the B byte does not contain any strongly driven signals if the direction control signal for A is low.

The SN74LVT245BPWRE4 also provides support for handshake protocols by means of the busy signal, which indicates when the transceiver is busy transferring data. A busy indication is provided when an internal pipeline register is totally or partially full.

To sum it up, the SN74LVT245BPWRE4 is an 8-bit transceiver which is used for data and address bus applications. The device simplifies bidirectional data communication schemes, and also provides support for handshaking protocols by means of the busy signal. The OE pin also allows the device to be put into a high-impedance state, allowing multiple transceivers on the same bus.

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