Typical application circuit

STCL132K

6/20

2

Typical application circuit

Figure 2.

Microprocessor (MCU, microcontroller unit) clock – replacement of a 32 KHz crystal

1.

For reliable operation and to further improve immunity to harsh environment, the minimum 0.1 µF decoupling capacitor is

block should then be placed near the microprocessor clock input.

2.

Internal 150 k

Ω pull-down resistor is implemented on the CE input. If the chip enable feature is not used, in active mode

port of the clocked microprocessor, for successful startup of the microprocessor at power-on, initial logic high level needs to

be secured on the CE pin to ensure clocking occurs during the power-on reset until the microprocessor program starts and

the controlling I/O port takes over the CE control.

AI12659a

GND

GND

VCC

VCC

CE (2)

NC

FOUT

1

2

3

5

4

MCU

I/O

Xtal1

(OSC1,

OSCin)

Xtal2

(OSC2,

OSCout)

NC

STCL132K

0.1 µF (1)