ST6200C/ST6201C/ST6203C
CLOCK AND TIMING CHARACTERISTICS (Cont’d)
11.5.4 RC Oscillator
The ST6 internal clock can be supplied with an ex-
ternal RC oscillator.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
MHz
KΩ
R
R
R
R
R
=22KΩ
=47KΩ
=100KΩ
=220KΩ
=470KΩ
7.2
5.1
3.2
1.8
0.9
8.6
5.7
3.4
1.9
0.95
10
6.5
3.8
2
NET
NET
NET
NET
NET
1.1
1)
f
RC oscillator frequency
OSC
R
R
R
R
R
=22KΩ
=47KΩ
=100KΩ
=220KΩ
=470KΩ
3.7
2.8
1.8
1
4.3
3
1.9
1.1
0.55
4.9
3.3
2
1.2
0.6
NET
NET
NET
NET
NET
0.5
2)
R
RC Oscillator external resistor
see Figure 52 & Figure 53
22
870
NET
Notes:
1. Data based on characterization results, not tested in production. These measurements were done with the OSCin pin
unconnected (only soldered on the PCB).
2. R
must have a positive temperature coefficient (ppm/°C), carbon resistors should therefore not be used.
NET
Figure 51. Typical Application with RC oscillator
V
V
DD
DD
EXTERNAL RC
OSC
OUT
CURRENT COPY
R
NET
V
DD
f
OSC
OSC
NC
IN
C ~9pF DISCHARGE
EX
ST62XX
73/104
1
ETC [ ETC ]
