The SN54LS390J is a dual 4-bit decade and binary counter integrated circuit component. It belongs to the family of SN54/74LS series, which are high-speed, low-power Schottky logic devices. This IC offers versatile counter functionality, making it widely used in digital circuits, arithmetic units, time delay circuits, and general-purpose counting applications. Here is an overview of its key features and capabilities:
1. Dual Counter: The SN54LS390J consists of two independent 4-bit counters, making it suitable for applications requiring two separate counting operations within a single IC.
2. Decade and Binary Counting Modes: The counters can be configured to operate in either decade mode (0 to 9) or binary mode (0 to 15). This dual functionality allows flexibility in designing circuits based on different counting requirements.
3. Cascading Capability: The outputs of one counter can be used as inputs for cascading multiple SN54LS390J ICs, enabling the formation of larger counting circuits or increased bit depth for more extensive counting ranges.
4. Asynchronous Operation: The counters operate asynchronously, meaning that each counter can be clocked individually. This characteristic enables independent control and synchronization of multiple counters.
5. Output Enable Control: An output enable pin is provided for each counter, allowing the user to enable or disable the output independently. This feature facilitates efficient power management and simplifies circuit design for applications that require specific output timing and control
