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HEF4060B

14-stage ripple-carry binary counter/divider and oscillator

NXP Semiconductors. 

NXP Semiconductors

HEF4060B

14-stage ripple-carry binary counter/divider and oscillator

The recommended values for these components to maintain agreement with the typical

oscillation formula are:

Ct  100 pF, up to any practical value,

10 k  Rt  1 M.

12.2 Typical crystal oscillator circuit

In Figure 7, R2 is the power limiting resistor. For starting and maintaining oscillation a

minimum transconductance is necessary.

MR (from logic) HEF4060B

11 RS

Rbias

REXT

10

100 kΩ to

1 MΩ R2 2.2 kΩ

22 pF to

C3

37 pF

C2 100 pF

001aae656

Fig 7. External component connection for

crystal oscillator

Rbias

560 kΩ

VDD

0.47 μF

100 μF

Vi

input

(f = 1 kHz)

output

A io

VSS

001aae657

Fig 8.

gfs = dio/dvi at vo is constant (see also Figure 9);

MR = LOW.

Test setup for measuring forward

transconductance (gfs)

HEF4060B

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 7 — 16 November 2011

© NXP B.V. 2011. All rights reserved.

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