The SN74145N is an integrated circuit (IC) component primarily used as a BCD-to-decimal decoder/driver. It is designed to convert binary-coded decimal (BCD) inputs into corresponding decimal outputs, making it ideal for various applications such as display systems, data encoding, and multiplexing. This IC is manufactured by different semiconductor companies like Texas Instruments.
Key features:
1. BCD-to-decimal conversion: The main purpose of the SN74145N is to convert a BCD input into its equivalent decimal output. It can process inputs from 0000 (0 in decimal) to 1001 (9 in decimal). Each BCD input is decoded into a unique output that can drive common anode, 7-segment displays or other output devices.
2. Active LOW outputs: This decoder/driver uses active LOW logic, meaning that when a particular input combination is applied, the corresponding output will be activated by pulling it to a low voltage level (typically 0V or ground).
3. Open collector outputs: The outputs of the SN74145N are open collector outputs. This means that the output will either be pulled down to ground when activated or left floating when deactivated. To drive common anode displays, external pull-up resistors are required to pull the outputs up to the desired voltage level.
4. Cascadable: The IC has an additional enable (ENABLE IN) input that allows cascading multiple SN74145N devices
