74HC4060PW datasheet(12/12 Pages) PHILIPS

12 / 12 page

December 1990

Philips Semiconductors

Product speciﬁcation

14-stage binary ripple counter with oscillator

74HC/HCT4060

Fig.11 External components connection for a crystal oscillator.

TYPICAL CRYSTAL OSCILLATOR

In Fig.11, R2 is the power limiting resistor.

For starting and maintaining oscillation a minimum

transconductance is necessary, so R2 should not

be too large. A practical value for R2 is 2.2 k

Ω.

AC WAVEFORMS

Fig.12 Waveforms showing the clock (RS) to

output (Q3) propagation delays, the clock

pulse width, the output transition times and

the maximum clock frequency.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.13 Waveforms showing the master reset (MR)

pulse width, the master reset to output (Qn)

propagation delays and the master reset to

clock (RS) removal time.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

PACKAGE OUTLINES

See

“74HC/HCT/HCU/HCMOS Logic Package Outlines”.

Fig.14 Waveforms showing the output (Qn) to Qn+1 propagation delays.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

74HC4060PW Fiches technique(PDF) 12 Page - NXP Semiconductors