SAA5290A Philips Semiconductors, SAA5290A Datasheet - Page 48
SAA5290A
Manufacturer Part Number
SAA5290A
Description
Economy teletext and TV microcontrollers
Manufacturer
Philips Semiconductors
Datasheet
1.SAA5290A.pdf
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Philips Semiconductors
9.23
The oscillator circuit is a single-stage inverting amplifier in a Pierce oscillator configuration. The circuitry between OSCIN
and OSCOUT is basically an inverter biased to the transfer point. A crystal must be used as the feedback element to
complete the oscillator circuitry. It is operated in parallel resonance. OSCIN is the high gain amplifier input and OSCOUT
is the output. To drive the device externally OSCIN is driven from an external source and OSCOUT is left open-circuit.
1997 Jul 07
handbook, halfpage
Economy teletext and TV microcontrollers
(1) The values of C1 and C2 depend on the crystal specification:
C1 = C2 = 2C
Clock generator
Fig.17 Oscillator circuit.
L
.
V SS
C1
C2
(1)
(1)
OSCGND
OSCOUT
OSCIN
MLC110
48
handbook, halfpage
Fig.18 Oscillator circuit driven from external source.
external clock
not connected
V SS
OSCGND
OSCOUT
OSCIN
SAA5x9x family
Preliminary specification
MLC111
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