41
42
IC306 : BU1924F / RDS
560p
CMP
V
SS3
comparator
8th Switched
capacitor filter
anti-aliasing
filter
100k
Ω
120k
Ω
100k
Ω
270p
MUX
Vref
2.2
µ
F
V
DD1
∗
1
Analog
Power supply
V
SS1
∗
1
V
DD2
∗
2
Digital
Power supply
V
SS2
XI
XO
4.332MH
Z
33pF
∗
3
33pF
∗
3
PLL
57kH
Z
RDS/ARI
PLL
1187.5Hz
Bi-phase
decoder
Measurement
circuit
Differential
decoder
T1
T2
RDATA
QUAL
RCLK
∗
1 : V
DD1
and V
DD2
are separated within the IC.
∗
2 : Have V
DD2
(digital power supply) of a sufficiently low impedance.
∗
3 : Match the capacitor constants with the crystal manufacturer.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
RCLK
(N.C.)
XO
XI
V
DD2
V
SS2
T1
T2
QUAL
RDATA
Vref
MUX
V
DD1
V
SS1
V
SS3
CMP
Reference
clock
(4)
(3)
(5)
(6)
(12)
(11)
(13)
(14)
(10)
(7)
(8)
(16)
(2)
(9)
(1)
Pin No.
Pin name
Symbol
Functions
Input/Output type
1
QUAL
Demodulator quality
Type C
Good data : High, bad data : Low
Refer to output data timing
6
V
SS1
7
8
2
RDATA
Demodulator data
9
T2
Test input
Type B
Open or connected to ground
10
T1
3
Vref
Reference voltage
4
MUX
Input
Type E
Type D
1/2 V
DD1
(refer to input/output circuits)
Composite signal input (refer to input/output circuits)
11
V
DD2
Digital power supply 4.5V to 5.5V
12
V
SS2
13
XI
Crystal oscillator
Type A
Connects to 4.332MHz oscillator
(refer to input/output circuits)
14
XO
15
(N.C.)
−
−
Type C
16
RCLK
Demodulator clock 1187.5Hz clock (refer to the timing diagram)
5
V
DD1
Analog power supply 4.5V to 5.5V
CMP
Comparator input
Type D
C-junction (refer to input/output circuits )
−
−
V
SS3
GND
−
−
−
−
Type A
Type B
Type D
10M
Ω
Type C
Type E
+
−
+
IC305 : ST232CDR
APPLICATION CIRCUITS
(note 1, note 2)
C4
+
C1
+
C1+
C1-
3
C2
+
C2+
C2-
4
5
11
10
12
9
TTL / CMOS OUTPUTS
TTL / CMOS INPUTS
V- 6
C5
+
+
C3
+5V INPUT
1
16
Vcc
V+
2
+10V
-10V
RS 232 OUTPUTS
RS 232 INPUTS
14
7
13
8
15
GND
5K
5K
+5V TO +10V
VOLTAGE
DOUBLER
+10V TO -10V
VOLTAGE
INVERTER
+5V
400K
T1
OUT
T1
IN
+5V
400K
T2
IN
T2
OUT
T1
T2
R2
IN
R1
IN
R2
OUT
R1
OUT
R1
R2
Capacitance Value (
µ
F)
C1
C2
C3
C4
C5
0.1
0.1
0.1
0.1
0.1
Note 1: C
1-4
capacitors can even be 1
µ
F ones.
Note 2: C
1-4
canbe common or biased capacitors.
ST232
4/11
PIN CONFIGURATION
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND F UNCTION
1
C
1
+
Positive Terminal for the first Charge Pump Capacitor
2
V+
Doubled Voltage Terminal
3
C
1
-
Negative Terminal for the first Charge Pump Capacitor
4
C
2
+
Positive Terminal for the second Charge Pump Capacitor
5
C
2
-
Negative Terminal for the second Charge Pump Capacitor
6
V-
Inverted Voltage Terminal
7
T2
OUT
Second Transmitter Output Voltage
8
R2
IN
Second Receiver Input Voltage
9
R2
OUT
Second Receiver Output Voltage
10
T2
IN
Second Transmitter Input Voltage
11
T1
IN
First Transmitter Input Voltage
12
R1
OUT
First Receiver Output Voltage
13
R1
IN
First Receiver Input Voltage
14
T1
OUT
First Transmitter Output Voltage
15
GND
Ground
16
V
CC
Supply Voltage
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
-0.3 to 6
V
T
IN
Transmitter Input Voltage Range
-0.3 to (V
CC
+ 0.3)
V
R
IN
Receiver Input Voltage Range
±
30
V
T
OUT
Transmitter Output Voltage Range
(V+ + 0.3) to (V- - 0.3)
V
R
OUT
Receiver Output Voltage Range
-0.3 to (V
CC
+ 0.3)
V
T
SCTOUT
Short Circuit Duration on T
OUT
infinite
T
stg
Storage Temperature Range
-65 to +150
o
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
Note1: No external supply can be applied toV+ terminal and V- terminal.
ST232
2/11
Summary of Contents for ST-15S1/N1G
Page 6: ...4 Click Yes Click Next Yes Next...
Page 7: ...5 Check Complete and click Next Click Install Complete Next Install...
Page 8: ...6 The status bar appears Click Finish Finish...
Page 12: ...10 Click Full Operation D E B P Click OK Click OK Full Operation D E B P OK OK...
Page 19: ...17 Choose Erase in Operation Click Execute Operation Erase Execute...
Page 22: ...20 Personal notes...