SN74HC373N

SN74HC373N: High-Speed CMOS Octal D-Type Latch with Tri-State Outputs

The SN74HC373N is a high-performance CMOS integrated circuit that functions as an octal D-type latch with tri-state outputs. It is manufactured by Texas Instruments and is widely used in digital systems for data buffering, latching, and driving bus lines.

The SN74HC373N contains eight independent D-type latches, each with a dedicated D input, a latch enable (LE) input, and an output (Q). When the LE input is HIGH, the latches are in the transparent mode, meaning that the outputs follow the changes in the corresponding D inputs in real-time. This allows for the transmission of data as it arrives. When the LE input is LOW, the latches hold the data present at their inputs at the time the LE input fell, and the outputs remain unchanged until the LE input is again asserted HIGH. This feature enables the storage and retention of data.

Additionally, the SN74HC373N includes an output enable (OE) input that controls the output state of the latches. When the OE input is HIGH, the outputs are placed in a high-impedance (tri-state) mode, which allows the latches to be connected to bus lines without interfering with other devices on the bus when not actively driving the bus. This feature is particularly useful in multiplexed systems.

The SN74HC373N operates with a supply voltage (VCC) ranging from 2V to 6V, providing flexibility for use in a variety of applications with different power supply requirements. It offers fast propagation delays, making it suitable for use in high-frequency digital circuits. The IC also consumes very little power, especially in standby mode when the OE input is HIGH.

The SN74HC373N is packaged in a PDIP-20 or other similar packages, making it easy to integrate into existing circuits. It includes input clamp diodes for overvoltage protection, ensuring reliable operation in harsh environments.

In summary, the SN74HC373N is a versatile, high-speed CMOS octal D-type latch with tri-state outputs that offers low power consumption, wide operating voltage range, and input protection. Its compact package and high-performance capabilities make it an ideal choice for use in a wide range of digital systems and applications.