The 74C923 is a 4-digit counter with multiplexed 7-segment output drivers manufactured by Fairchild/ON Semiconductor. This integrated circuit is designed to count events and display the count on a 7-segment LED display. The multiplexed output reduces the number of pins required for the display interface, making it suitable for applications with limited I/O resources.

Applications:

• Digital counters
• Frequency counters
• Event counters
• Timers
• Instrumentation displays

Features:

• 4-digit counter
• Multiplexed 7-segment output drivers
• BCD outputs for each digit
• Reset input
• Count enable input
• Latch enable input

Benefits:

• Simplified display interface due to multiplexed outputs, reducing the number of required connections.
• Easy to integrate into digital systems due to the BCD outputs, enabling further processing or data logging.
• Flexible control over counting through the count enable and reset inputs.
• Stable display with the latch enable input, allowing the counter to continue counting while the display remains static.

Additional Details:

The 74C923 operates with a supply voltage range of 3V to 15V. The multiplexing frequency is determined by an external oscillator, allowing for adjustment of the display brightness and flicker. The IC also includes a carry-out signal, enabling cascading of multiple 74C923 devices to create counters with more than four digits. It comes in a DIP package. Proper debouncing of input signals is crucial for reliable operation. Input pins are CMOS compatible, offering high input impedance and low power consumption.