74AHC3GU04_4

© NXP B.V. 2010. All rights reserved.

Product data sheet

Rev. 04 — 7 January 2010

9 of 15

NXP Semiconductors

74AHC3GU04

Inverter

Table 11.

External components for resonator (f < 1 MHz)

All values given are typical and must be used as an initial set-up.

Frequency

R1

R2

C1

C2

10 kHz to 15.9 kHz

22 M

Ω

220 k

Ω

56 pF

20 pF

16 kHz to 24.9 kHz

22 M

Ω

220 k

Ω

56 pF

10 pF

25 kHz to 54.9 kHz

22 M

Ω

100 k

Ω

56 pF

10 pF

55 kHz to 129.9 kHz

22 M

Ω

100 k

Ω

47 pF

5 pF

130 kHz to 199.9 kHz

22 M

Ω

47 k

Ω

47 pF

5 pF

200 kHz to 349.9 kHz

22 M

Ω

47 k

Ω

47 pF

5 pF

350 kHz to 600 kHz

22 M

Ω

47 k

Ω

47 pF

5 pF

Table 12.

Optimum value for R2

Frequency

R2

Optimum for

3 kHz

2.0 k

Ω

8.0 k

Ω

6 kHz

1.0 k

Ω

4.7 k

Ω

10 kHz

0.5 k

Ω

2.0 k

Ω

14 kHz

0.5 k

Ω

1.0 k

Ω

>14 kHz

-

replace R2 by C3 with a typical value of 35 pF