Àû²©¡¤(¼¯ÍÅ)ÓÐÏÞ¹«Ë¾¹ÙÍø

General Description

The CD4017BC is a 5-stage divide-by-10 Johnson counter

with 10 decoded outputs and a carry out bit.

The CD4022BC is a 4-stage divide-by-8 Johnson counter

with 8 decoded outputs and a carry-out bit.

These counters are cleared to their zero count by a logical

¡°1¡± on their reset line. These counters are advanced on the

positive edge of the clock signal when the clock enable signal

is in the logical ¡°0¡± state.

The configuration of the CD4017BC and CD4022BC permits

medium speed operation and assures a hazard free

counting sequence. The 10/8 decoded outputs are normally

in the logical ¡°0¡± state and go to the logical ¡°1¡± state

only at their respective time slot. Each decoded output

remains high for 1 full clock cycle. The carry-out signal

completes a full cycle for every 10/8 clock input cycles and

is used as a ripple carry signal to any succeeding stages.

Features

Wide supply voltage range: 3.0V to 15V

High noise immunity: 0.45 VDD (typ.)

Low power Fan out of 2 driving 74L

TTL compatibility: or 1 driving 74LS

Medium speed operation: 5.0 MHz (typ.)

with 10V VDD

Low power: 10 ¦ÌW (typ.)

Fully static operation

Applications

? Automotive

? Instrumentation

? Medical electronics

? Alarm systems

? Industrial electronics

? Remote metering