Datasheet

ST6200C/ST6201C/ST6203C
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CLOCK AND TIMING CHARACTERISTICS (Cont’d)
10.5.3 Crystal and Ceramic Resonator Oscillators
The ST6 internal clock can be supplied with sever-
al different Crystal/Ceramic resonator oscillators.
Only parallel resonant crystals can be used. All the
information given in this paragraph are based on
characterization results with specified typical ex-
ternal components. Refer to the crystal/ceramic
resonator manufacturer for more details (frequen-
cy, package, accuracy...).
Notes:
1. Resonator characteristics given by the crystal/ceramic resonator manufacturer.
2. t
SU(OSC)
is the typical oscillator start-up time measured between V
DD
=2.8V and the fetch of the first instruction (with a
quick V
DD
ramp-up from 0 to 5V (<50
µ
s).
3. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small R
S
value.
Refer to crystal/ceramic resonator manufacturer for more details.
Figure 44. Typical Application with a Crystal or Ceramic Resonator
Symbol Parameter Conditions Typ Unit
R
F
Feedback resistor 3 M
Ω
C
L1
C
L2
Recommended load capacitances versus equiva-
lent crystal or ceramic resonator frequency
f
OSC
=32 kHz,
f
OSC
=1 MHz
f
OSC
=2 MHz
f
OSC
=4 MHz
f
OSC
=8 MHz
120
47
33
33
22
pF
Oscillator
Typical Crystal or Ceramic Resonators
C
L1
[pF]
C
L2
[pF]
t
SU(osc)
[ms]
1)
Reference Freq. Characteristic
1)
Ceramic
MURATA
CSB455E
455KHz
∆
f
OSC
=[±0.5KHz
tolerance
,±0.3%
∆
Ta
,
±0.5%
aging
] 220 220
CSB1000J
1MHz
∆
f
OSC
=[±0.5KHz
tolerance
,±0.3%
∆
Ta
,
±0.5%
aging
] 100 100
CSTCC2.00MG0H6
2MHz
∆
f
OSC
=[±0.5%
tolerance
,±0.5%
∆
Ta
,
±0.3%
aging
]4747
CSTCC4.00MG0H6
4MHz
∆
f
OSC
=[±0.5%
tolerance
,±0.3%
∆
Ta
,
±0.3%
aging
]4747
CSTCC8.00MG
8MHz
∆
f
OSC
=[±0.5%
tolerance
,±0.3%
∆
Ta
,
±0.3%
aging
]1515
OSC
OUT
OSC
IN
C
L1
C
L2
R
F
ST62XX
RESONATOR
V
DD
F
OSC
1