8409901RX Datasheet, PDF (6/7 Pages) Texas Instruments – 14-STAGE ASYNCHRONOUS BINARY COUNTER AND OSCILLATOR

SN74HC4060ĆQ1
14ĆSTAGE ASYNCHRONOUS BINARY COUNTER AND OSCILLATOR
SCLS599 − NOVEMBER 2004
CONNECTING AN RC-OSCILLATOR CIRCUIT TO THE SN74HC4060 DEVICE
The SN74HC4060 device consists 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
16
2
15
3
14
4
13
5
12
R2
6
11
7
10
R1
8
9
C
To determine the values of capacitance and resistance necessary to obtain a specific oscillator frequency (f), use
this formula:
f
+
1
ǒ _2(R1)(C)
0.405 R2
R1)R2
)
0.693^Ǔ
If R2 > > R1 (i.e., R2 = 10R1), the above formula simplifies to:
f
+
0.455
RC
6
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