7490 Decade Counter IC

7490 Decade Counter IC The 7490 Decade Counter IC is a TTL digital counter designed to count clock pulses and divide an input frequency by specific ratios. It is commonly used in digital counting, frequency division, timing, and display circuits. The IC contains a four-bit counter that can be configured as a decade counter to count from 0 to 9 and then reset to 0. Key Features: - 4-bit decade counter - Counts from 0 to 9 - Frequency division capability - TTL-compatible digital logic - Separate clock inputs for flexible counter configurations - Asynchronous reset inputs - 14-pin DIP package - Easy to interface with other digital logic ICs Applications: - Digital counters - Frequency divider circuits - Digital clocks and timers - Event and pulse counting - LED and 7-segment display counters - Digital logic projects - Electronic timing circuits - Arduino and educational electronics projects Wire Connection: VCC – Connect to +5V GND – Connect to GND Clock Input – Connect to the pulse or clock signal QA, QB, QC, QD – Counter outputs Reset Inputs – Connect according to the required counting sequence For a basic decade counter, the clock signal is applied to the appropriate clock input and the four outputs provide the binary-coded count from 0 through 9.