January 1995

6

Philips Semiconductors

Product specification

14-stage ripple-carry binary counter/divider

and oscillator

HEF4060B

MSI

Timing component limitations

The oscillator frequency is mainly determined by

of R2 is to minimize the influence of the forward voltage

across the input protection diodes on the frequency. The

stray capacitance C2 should be kept as small as possible.

LOCMOS ‘ON’ resistance in series with it, which typically

is 500

The recommended values for these components to

maintain agreement with the typical oscillation formula are:

10 k

Typical crystal oscillator circuit

In Fig.5, R2 is the power limiting resistor. For starting and

maintaining oscillation a minimum transconductance is

necessary.

Fig.5

External component connection for crystal

oscillator.

Fig.6

MR = LOW.