The SN74LS697N is a high-speed complementary metal-oxide-semiconductor (CMOS) integrated circuit (IC) component widely used in digital electronics. This device is a 4-bit synchronous up/down binary counter that incorporates an asynchronous clear function.
Key Features:
1. Counter Function: The SN74LS697N acts as a 4-bit binary counter, meaning it can count in binary from 0 to 15 (2^4 - 1). It can increment or decrement its count by one in response to an external clock signal.
2. Up/Down Control: This IC offers control over the direction of counting. It has an up/down (U/D) input pin, which, when set HIGH, makes it count upwards, and when set LOW, makes it count downwards.
3. Synchronous Operation: The counter is synchronous, indicating that the count changes occur precisely on the rising edge of the clock signal. This ensures that all the internal flip-flops change their states simultaneously, avoiding any glitches or errors.
4. Asynchronous Clear: The IC has a dedicated asynchronous clear (CLR) input pin. When this pin is activated (LOW), it instantly forces the counter to reset to zero, regardless of the clock or U/D inputs.
5. Carry Output: The SN74LS697N provides a terminal called CARRY OUT, which generates a HIGH output signal whenever a count overflow or underflow occurs
