PI74FCT245CTQE

PI74FCT245CTQE is a type of logic buffer/line driver. It provides very fast switching and low propagation delay, making it ideal for use in high performance applications such as microprocessor systems, clock and system timing, bus bridges, I/O expanders and multiplexers.

The PI74FCT245CTQE is a 3.3V supply, non-inverting octal buffer/line driver that interfaces between an 8-bit parallel bus and 8 bit latches. The Buffer is capable of driving 15 low-capacitance loads and (with a load of 15pF at 3V supply level) has a propagation delay of 8ns.

The PI74FCT245CTQE has two input control pins, A0, A1, and two output enable pins, OEx, OENx. A0 and A1 control the direction of data flow. In their active-high state, A0 and A1 control the flow of data into the Buffers, allowing for conventional 3-state operation with TTL levels. A1=High and A0=Low produces an output phase that is one half- clock-cycle earlier than when both A1 and A0 are high. OEx and OENx are both active low pins used to put the outputs into the high-impedance state, independently of the data on the inputs.

The PI74FCT245CTQE is characterized for operation over the temperature range of –40C to +85C, and is available in a 20-pin Plastic PLL package.

The PI74FCT245CTQE serves a variety of applications such as providing the level translation between buses, providing extra-input buffers for increasing system throughput, and providing high-speed low-skew multiplexers for generating clocks or data. It can also be used as a latch and for bidirectional buffer control applications.

The PI74FCT245CTQE working principle is based on transistor-transistor logic (TTL) circuitry. It allows for the TTL logic to be interfaced with higher voltage logic devices, such as those used in low power logic systems. It is important to note that the PI74FCT245CTQE is not capable of operating in high voltage operating conditions, as the supply voltage range of the device is limited to a maximum of 3.3 V.

In conclusion, the PI74FCT245CTQE is mainly used for line/bus-driving applications, due to its fast switching and low propagation delay. It is used in a variety of applications, such as providing the level translation between buses, increasing system throughput, and providing multiplexers for generating clocks or data. Its working principle is based on transistor-transistor logic circuitry, and is limited to operating under 3.3 V supply voltage conditions.