FX803 Datasheet, PDF (4/17 Pages) Sanyo Semicon Device – DC-DC Converter

External Components
V_DD
C₆
XTAL
1
SEE INSET
BELOW
XTAL/CLOCK
2
V_DD
24
23
SERIAL CLOCK
V_SS
R₈
REPLY DATA
3
CS
4
22
SWITCHED SUM OUT
R₆
21
*
COMMAND DATA
5
LOGIC INPUT
6
IRQ
7
8
SUM OUT
20
*
FX803J ^{SUM IN}
R₃
19
CAL/CUES OUT
18
TONE 2 OUT
R₄
17
*
C₅
TONE LEVEL
and
GAIN
COMPONENTS
9
AUDIO SWITCH IN
10
AUDIO SWITCH OUT
*
11
R₇
V_SS
12
TONE 1 OUT
16
*
15
V_BIAS
R₅
SIGNAL BIAS
R₂
14
(Rx) AUDIO IN
13
C₁
C₂
V_SS
INSET
XTAL ₁
Component
R
=
1
X
R
1
1
FX803J
R₂
*R
3
*R₄
2
XTAL/CLOCK
C4
C₃
V
SS
*R
5
*R₆
*R
7
Fig.2 Recommended External Components
R₈
Value
1.0MΩ
2.0MΩ
100kΩ
82.0kΩ
122kΩ
100kΩ
100kΩ
22.0kΩ
C=
1
0.1µF
C
2
1.0µF
C₃
33.0pF
C
33.0pF
4
C₅
22.0pF
C
6
1.0µF
X₁
f_XTAL 4.00MHz
Tolerance: R = ± 10% C = ± 20%
Notes
1. Xtal/clock circuitry components shown INSET are
recommended in accordance with CML Application
Note D/XT/1 April 1986. The DBS 800 System Support
Document contains additional notes on the use of Xtal/
clock frequencies (f ).
XTAL
2. It is recommended that, to improve screening and
reduce noise levels around the FX803, Pins 8, 9 and 22
are connected to V .
SS
3. Resistors marked with an asterisk (*) are System
Components, calculated to operate in a system with
other DBS 800 microcircuits. Figure 3 shows in detail,
these components used in the System signal paths.
R , R , R , C – Tone mixing components to provide a
3455
3dB tone-differential (twist) when used in a DTMF
configuration. Single tone output levels are set
independently or by the FX806 Modulator Drivers.
R – Modulation level and matching for inputs to the
7
FX806.
Part of FX803
TONE 2 OUT
17
16
TONE 1 OUT
AUDIO SWITCH IN
10
FROM FX806
“MAIN PROCESS OUT”
11 ^{AUDIO SWITCH OUT}
TO FX806
“SUM IN”
SUM IN
CAL
CUES
18 CAL/CUES OUT
TO FX806
“CALIBRATION IN”
21
BIAS
+
19
–
SUMMING
AMPLIFIER
SWITCHED SUM OUT
20 ^{SUM OUT}
Fig.3 Output Signal Switching
4