TC74HC4017AP

The Toshiba TC74HC4017AP is a silicon monolithic CMOS digital integrated circuit featuring a 5-stage divided-by-10 Johnson counter with 10 decoded outputs (Q0-Q9) and a carry-out bit. Fabricated with silicon gate C2MOS technology, it achieves high-speed operation comparable to LSTTL while maintaining low CMOS power dissipation.

Key electrical characteristics include a maximum clock frequency (fmax) of 87 MHz at 5V, a low supply current (ICC) of 4 µA maximum at 25°C, and high noise immunity. The device operates over a wide voltage range of 2V to 6V. Its outputs can drive up to 10 LSTTL loads with symmetrical output impedance and balanced propagation delays.

Available in DIP and SOP packages, the TC74HC4017AP is pin and function compatible with the 4017B. All inputs are protected against static discharge or transient excess voltage. This counter is advanced on the positive edge of the clock signal when the clock enable (CE) is low, or on the negative edge of CE when the clock (CK) is high. Holding the CLR input high clears the counter to its zero state.

This component is well-suited for digital counting, sequencing, and control applications where high speed and low power consumption are critical. Its robust design and compatibility with standard logic families make it a versatile choice for embedded systems and digital circuit designs.