SAA5246A Datasheet, PDF (26/50 Pages) NXP Semiconductors – Integrated VIP and Teletext IVT1.0

Philips Semiconductors
Integrated VIP and Teletext (IVT1.0)
Product specification
SAA5246A
CLOCK SYSTEMS
Crystal oscillator
The oscillator is a low amplitude, low distortion design operation at 27 MHz. It is capable of oscillating with both
fundamental and third overtone mode crystals. External components should be used to suppress the fundamental output
of the third overtone as illustrated in Fig.12.
Table 5 Crystal characteristics.
SYMBOL
PARAMETER
Crystal (27 MHz, 3rd overtone)
C1
series capacitance
C0
parallel capacitance
C_L
load capacitance
Rr
resonant resistance
R1
series resistance
Xa
ageing
Xj
adjustment tolerance
Xd
drift
MIN.
−
−
−
−
−
−
−
−
TYP.
1.7
5.2
20
−
20
−
−
−
MAX.
UNIT
-
pF
−
pF
−
pF
50
Ω
−
Ω
±5
10^−6/yr
±25
10^−6
±25
10^−6
handbook, full pagewidth
VDD
OSCOUT
3.3 kΩ
1 nF
4.7 µH _{10 pF 15 pF 100 nF}
27 MHz 3rd
overtone
OSCIN
OSCGND
SAA5246A
CRYSTAL
OSCILLATOR
MLA847 - 1
Fig.12 Crystal oscillator application diagram.
January 1993
26