SN54HC4060, SN74HC4060

14STAGE ASYNCHRONOUS BINARY COUNTERS AND OSCILLATORS

SCLS161D − DECEMBER 1982 − REVISED SEPTEMBER 2003

6

POST OFFICE BOX 655303

CONNECTING AN RC-OSCILLATOR CIRCUIT TO THE ’HC4060 DEVICES

The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator

configuration allows design of either RC- or crystal-oscillator circuits.

When an RC-oscillator circuit is implemented, two resistors and a capacitor are required. The components are

attached to the terminals as shown:

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

R2

R1

C

To determine the values of capacitance and resistance necessary to obtain a specific oscillator frequency (f), use

this formula:

f

+

1

2(R1)(C)

0.405 R2

R1

If R2 > > R1 (i.e., R2 = 10R1), the above formula simplifies to:

f

+ 0.455

RC