CD74HCT74ME4

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Flip-flop is a type of logic circuit whose output remains in one state either high or low until instructed to change the state. Such a circuit is called a bi-stable circuit. A bistable circuit has two stable states, which means that there is more than one output in the circuit. A flip-flop is essentially a specialized bistable circuit. The CD74HCT74ME4 is a dual D Flip-Flop IC that combines two single D-type flip-flops with Clock (CP) and Clear (CLR) in a single package. This device is designed for 2-phase clock operation, and offers a high-performance and low-power alternative to standard MSI Bilateral Switch ICs.

The CD74HCT74ME4 is an ideal device for the two-phase clocking applications of dynamic address calculations in microprocessors, counters and general delay purposes. The device has two individual data inputs (D1 and D2), two clock pulses (Clock 1 and Clock 2) and two active-low resets (Reset 1 and Reset 2). When the clock pulse triggers (on each of the two phases), the data available on the respective data inputs (D1 and D2) are transferred to the output. The control lines CLR1 and CLR2 reset the flip-flop to zero on each of the two phases.

The CD74HCT74ME4 is also characterized by its low current consumption making it ideal for portable devices, as well as its low power-up clear time, ideal for applications in which a fast initialization is required. It is available in a small form factor making it suitable for a wide range of applications including logic level conversions, multiplexers and clock frequency dividers. It is also able to withstand a wide range of temperatures, making it a suitable choice for a variety of environments.

The clock logic level present on the CPL/CPH pins of the CD74HCT74ME4 determines whether the flip-flop should be operated in single-phase or dual phase mode. In normal mode, for the flip-flop to change state, both of the clock logic levels must be in high state. In dual phase mode, the device can be operated in inverted phase and then the clock logic levels must be in the opposite state for the flip-flop to change state.

When the clock pulse triggers, the data present at the input pins of the CD74HCT74ME4 are transferred to the output. If both the CPL and CPH are high, the data at the D1 is transferred to the Q1 and the data at the D2 is transferred to the Q2. If CPL is low and CPH is high, the data at the D1 is transferred to the Q2 and the data at the D2 is transferred to the Q1. Similarly, if CPL and CPH are high in opposite states (CPL is low, CPH is high) the data will be transferred from D1 to Q2, and from D2 to Q1.

The CD74HCT74ME4 is also characterized by its high speed and low-power consumption. It has a fast switching speed of up to 360MHz, so it can handle fast data rates without compromising performance or power consumption. The maximum low power consumption of the CD74HCT74ME4 is typically only 10µA at 5V making it a viable option for low power applications.

The CD74HCT74ME4 is replaceable with other dual D-type flip-flops, but provides a more advanced feature set. Its small size, low current consumption and fast response rate make it suitable for a wide range of applications. Its dual-phase operation is also a great advantage for applications in which a higher level of control is needed.

In summary, CD74HCT74ME4 is a dual D type flip-flop IC offering a high performance and low power alternative to standard MSI BQ Switch ICs. It is characterized by its low current consumption and fast switching speed, making it an ideal choice for two-phase clock applications and dynamic address calculations, particularly in microprocessors, counters and general delay purposes. The CD74HCT74ME4 is suitable for a wide range of applications including logic level conversions, multiplexers and clock frequency dividers and is also able to withstand a wide range of temperatures.

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