SAA5244A Datasheet, PDF (23/32 Pages) NXP Semiconductors – Integrated VIP and teletext decoder IVT1.1

Philips Semiconductors
Integrated VIP and teletext decoder
(IVT1.1)
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
Product specification
SAA5244A
MIN.
TYP.
MAX.
UNIT
−
1.7
−
pF
−
5.2
−
pF
−
20
−
pF
−
−
50
Ω
−
20
−
Ω
−
−
±5
10^−6/yr
−
−
±25
10^−6
−
−
±25
10^−6
handbook, full pagewidth
1
2
1 nF _{4.7 µH} 15 p 10 p 100 nF ₃
3.3 kΩ
27 MHz
4
SAA5244A
CRYSTAL
OSCILLATOR
MLA036 - 5
Fig.11 Crystal oscillator application diagram.
CLOCK SYSTEMS
Crystal oscillator
The crystal is a conventional 2-pin design operating 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 shown in Fig.11. The crystal
characteristics are given in Table 5.
March 1992
23