74FCT2245CTSOG8

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The 74FCT2245CTSOG8 is a high-speed CMOS logic buffer amplifier which is designed for bi-directional signal buffering roles in high speed systems applications. The device is rated at 8-bit and capable of performing operation at frequencies of up to 200 Mhz. It is especially ideal for applications which require a low noise level and/or low crosstalk performance.

The 74FCT2245CTSOG8 employs double-rail signal path with complementary outputs; meaning the complementary input and output pins are connected to the same signal path. This configuration provides superior performance, making the device an ideal choice for applications in which signal integrity is paramount. The device is built using high speed CMOS logic and is rated to operate at a supply voltage of 3.3V or 5V.

The device is further developed with a Schmitt trigger input which ensures a high degree of noise immunity by hysteresis. Hysteresis is the positive feedback system, in which the output responds to the change in the input level and the input responds to the change in the output level. This configuration allows for an excellent signal integrity, performance, and allows for lower power requirements.

The working principle of the device is based on its high speed CMOS logic. The input signal is passed through a transistor array that is configured in a push-pull high speed amplifier. The clock period is tuned to match maximum performance of the output. The transistor array is configured with two stages, the first stage is an inverting Schmitt trigger, and the second stage is a current-mirror emitter-follower output stage.

The Schmitt trigger stage is designed to reject noise, by introducing positive feedback for hysteresis. Hysteresis ensures a clean transition from logical HIGH to logical LOW and vice versa. This configuration ensures that the logical HIGH will always remain at the same level regardless of the input swing and vice versa.

The transistor mirror array is designed for high speed linear operation, allowing for fast switching of the output signals. The current-mirror is designed to minimize power consumption, by providing a constant current source for the output which allows for higher switching speeds and lower power consumption.

In summary, the 74FCT2245CTSOG8 is a high speed CMOS logic buffer amplifier specifically designed for bi-directional signal buffering roles in high speed systems applications. The device is capable of performing operations at frequencies of up to 200Mhz and is rated at 8-bit. It features double rail signal paths with complementary outputs, a Schmitt trigger input for noise immunity, and a current-mirror emitter-follower output stage. The device is built using low power high speed CMOS logic and is rated to operate at a supply voltage of 3.3V or 5V.

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