STCL1100 Datasheet, PDF (6/17 Pages) STMicroelectronics – High frequency silicon oscillator family

Typical application circuit
2
Typical application circuit
STCL1100 STCL1120 STCL1160
Figure 2. Microprocessor (MCU, microcontroller unit) clock example
- replacement of a crystal or ceramic resonator
MCU
I/O
Xtal1
(OSC1,
OSCin)
Xtal2
(OSC2,
OSCout)
CE ⁽²⁾
1
VCC
5
NC 2 STCL1xx0
FOUT
3
GND
4
NC or GND
(see datasheet of
the specific MCU)
0.1 µF(1)
VCC
5V
GND
AI12657c
1. For reliable operation and to further improve immunity to harsh environment, the minimum 0.1 µF decoupling capacitor is
recommended to be placed as close as possible to the V_CC and GND pins of the oscillator device. The whole oscillator
block should then be placed near the microprocessor clock input.
2. To minimize standby current, no internal pull-up resistor to V_CC is implemented on the CE input, thus the input level must
be permanently defined by the controlling signal. If the chip enable feature is not used, in active mode connect the CE pin
to V_CC. In applications utilizing standby mode and where the CE pin is connected to the controlling I/O port of the clocked
microprocessor, for successful start-up of the microprocessor at power-on, initial logic high level needs to be secured on
the CE pin to provide clock already during the power-on reset until the microprocessor program starts and the controlling
I/O port takes over the CE control.
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