The MM74HC259N is an integrated circuit (IC) component that belongs to the 74HC family of high-speed CMOS logic. It is a 8-bit addressable latch and also incorporates a 3-state buffer. Here are some key features and functions of the MM74HC259N:
1. 8-Bit Addressable Latch: The MM74HC259N can store 8 bits of digital information. It has a separate input and output line for each bit, making it addressable.
2. Latch and Buffer Combination: It combines the functionality of a latch and a buffer in a single IC. This means it can hold the data in its latch until it is needed, and then buffers the output when required.
3. 3-State Outputs: The MM74HC259N has 3-state outputs, which means that the outputs can be in one of three states: high (logic 1), low (logic 0), or high impedance. This allows multiple devices to share a common bus without interfering with each other.
4. Common Clock and Enable Inputs: The IC has a clock input (CP) which latches the data into the internal register based on the rising edge of the clock signal. It also has an enable input (OE) which activates the outputs and allows the latched data to be accessed.
5. Cascadable: The MM74HC259N can be cascaded with other similar devices to create larger registers
