saa5261 NXP Semiconductors, saa5261 Datasheet - Page 22

• Manufacturer Part Number: saa5261
• Description: Saa5261; Saa5262; Saa5263 10-page Intelligent Teletext Decoders
• Manufacturer: NXP Semiconductors

Philips Semiconductors
CLOCK GENERATOR
The oscillator circuit is a single-stage inverting amplifier in a Pierce oscillator configuration. The circuitry between pins
XTALI and XTALO 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. XTALI is the high gain amplifier input and XTALO
is the output.
To drive the device externally XTALI is driven from an external source and XTALO is left open-circuit.
1998 Apr 22
handbook, halfpage
10-page intelligent teletext decoders
(1) The values of C1 and C2 depend on the crystal specification:
C1 = C2 = 2C
Fig.14 Oscillator circuit.
L
.
C1
C2
(1)
(1)
OSCGND
XTALO
XTALI
40
41
42
MGL415
22
handbook, halfpage
Fig.15 Oscillator circuit driven from external
SAA5261; SAA5262; SAA5263
source.
not connected
external clock
not connected
OSCGND
XTALO
XTALI
Product specification
40
41
42
MGL416