The CD74HC109M is a digital Flip Flop type circuit from Texas Instruments. It is a 2-element JK type device, with a single bit of positive edge. The device is designed in a small form factor with a dimension of 0.154" x 3.90mm, and is available in a 16-pin small outline integrated circuit (SOIC) package.The circuit has two mounting pins, J and K, a clock (CLK) input pin, and a reset (RES) input pin. The J and K pins can each be used to transfer data into the circuit, while the CLK pin is used to latch the data at every positive edge that is applied. The reset pin acts as a reset on the circuit, allowing the data to be cleared and the Flip Flop to be reset.The CD74HC109M is a high speed device, with a propagation delay of 6.7ns and can operate from a 3.15V to 5.5V power supply. The circuit is designed to consume minimal power, and the package offers over-temperature protection. It is ideal for applications that require a reliable yet energy efficient Flip Flop circuit, such as process control latch circuits.