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74HC3GU04

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Product data sheet

Rev. 5 — 2 October 2013

10 of 17

Nexperia

74HC3GU04

Triple unbuffered inverter

Test data is given in Table 11 and Table 12.

C1 = 47 pF (typical).

C2 = 22 pF (typical).

R1 = 1 M

 to 10 M (typical).

R2 optimum value depends on the frequency and required stability against changes in VCC or average minimum ICC

(ICC =2mA at VCC = 3.0 V and f = 1 MHz)

Fig 14. Crystal oscillator application

mna053

U04

out

R2

R1

C1

C2

Table 11.

External components for resonator (f < 1 MHz)

Frequency

R1

R2

C1

C2

10 kHz to 15.9 kHz

2.2 M



220 k



56 pF

20 pF

16 kHz to 24.9 kHz

2.2 M



220 k



56 pF

10 pF

25 kHz to 54.9 kHz

2.2 M



100 k



56 pF

10 pF

55 kHz to 129.9 kHz

2.2 M



100 k



47 pF

5 pF

130 kHz to 199.9 kHz

2.2 M



47 k



47 pF

5 pF

200 kHz to 349.9 kHz

2.2 M



47 k



47 pF

5 pF

350 kHz to 600 kHz

2.2 M



47 k



47 pF

5 pF

Table 12.

Optimum value for R2

Frequency

R2

Optimum

3 kHz

2.0 k



minimum required ICC

8.0 k



minimum influence due to change in VCC

6 kHz

1.0 k



minimum required ICC

4.7 k



minimum influence by VCC

10 kHz

0.5 k



minimum required ICC

2.0 k



minimum influence by VCC

14 kHz

0.5 k



minimum required ICC

2.0 k



minimum influence by VCC

> 14 kHz

replace R2 by C3 = 35 pF (typical)