MC100EP35D

The MC100EP35D is a flip-flop digital logic circuit in the MC100 family of devices from ON Semiconductor. It is a 3-state output register comprised of four D flip-flops with two separate clock inputs. This device also features two buffered common clock inputs which can be used to reduce clock loading. The MC100EP35D features two separate active-high output enable pins, one for each of its two banks, that can be used to enable or disable output data.

The main application field for this device is to provide multi-state memory storage or to provide temporary storage of data in synchronous systems. When used as storage, this device allows for the data to be retained after the clocking signal has been removed, allowing for the data to be available throughout the system. The logic circuit time delay allows for propagation of data from the flip-flops to the outputs without the need for multiple clock cycles.

The logic circuit can also be used for timing control with asynchronous control. This is because the device has edge-triggered D flip flops which respond to the active clock edge. This functionality allows for a certain time delay to be implemented in the device’s response by the combination of clock polarity and setup/hold times. This can be used to control the sequence of events that result from logic input.

The logic circuit is constructed with four D flip-flops, each with its own asynchronous active-low reset input. The active-low reset enables the data stored in the flip-flops to be reset taking into account the setup/hold times. The device can also be used with combinational logic circuits, allowing for multiplexers or decoders to control data storage for variable lengths. This device is also characterized for operation from −4.2 V to 3.6 V.

In order to understand the function of the device in more detail, it is important to understand the working principle of a D flip-flop logic circuit. A D flip-flop is a sequential logic circuit which captures data on the active edge of the clock signal, which in this case is Low-to-High (LH) or High-to-Low (HL) depending on the state of the Clock Polarity Control (CPC) input. The two data inputs, Data A and Data B, are latched on the active clock edge and stored in the device’s internal registers. The data stored in these registers, referred to as Q A and Q B, is buffered and available to the outputs concurrently.

The outputs are three-state buffers that can be controlled by the two separate output enable pins, OE A and OE B. When either or both of the output enable pins are in the active-high state, the data stored at the internal registers is presented at the outputs and when both OE A and OE B are in the active-low state, the outputs will be set in the high impedance state.

The MC100EP35D device is suitable for a variety of applications such as counter operations, pattern recognition, automotive and medical applications that require multi-state memory storage or temporal storage of data in synchronous systems. The device provides a convenient, robust, and cost effective solution for these type of applications.