MC68HC912D60A MOTOROLA [Motorola, Inc], MC68HC912D60A Datasheet - Page 191

• Manufacturer Part Number: MC68HC912D60A
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

12.4.4 MC68HC912D60C DC Blocking Capacitor Guidelines
MC68HC912D60A — Rev 3.0
MOTOROLA
Due to the placement of the resonator from EXTAL to VSS and the
nature of the microcontroller’s inputs, there will be a DC bias voltage of
approximately (VDD–2V) across the pins of the resonator. For some
resonators, this can have long-term reliability issues. To remedy this
situation, a DC-blocking capacitor can be placed in series with the
crystal, as shown in
The value of the DC-blocking capacitor should be between 0.1 and
10nF, with a preferred value of 1nF. This capacitor must be connected
as shown in
specifications and guidelines continue to apply.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Figure
12-3. If connected thus, all other oscillator
Oscillator
Figure
12-3.
MC68HC912D60C Colpitts Oscillator Specification
Technical Data
Oscillator
191