ICL232 Datasheet, PDF (3/5 Pages) Intersil Corporation – +5V Powered, Dual RS-232 Transmitter/Receiver

ICL232
Test Circuits
1µF ^-
C3 _{+ 1 C1+}
1µF ⁺
C1 -
2 V+
3 C1-
1µF ⁺
4 C2+
C2 _-
5 C2-
1µF C4
6 V-
3kΩ
T2 OUTPUT
7 ^T2OUT
RS-232
±30V INPUT
8 R2_IN
+4.5V TO
+5.5V INPUT
V_CC 16
GND 15
T1_{OUT 14}
R1_IN 13
R1_OUT 12
T1_IN 11
T2_IN 10
R2_OUT 9
3kΩ
T1 OUTPUT
RS-232
±30V INPUT
TTL/CMOS
OUTPUT
TTL/CMOS
INPUT
TTL/CMOS
INPUT
TTL/CMOS
OUTPUT
FIGURE 1. GENERAL TEST CIRCUIT
Typical Performance Curves
1 C1+
2 V+
3 C1-
4 C2+
5 C2-
6 V-
7 ^T2OUT
8 R2_IN
V_CC 16
GND 15
T1_OUT 14
R1_IN 13
R1_OUT 12
T1_IN 11
T2_IN 10
R2_OUT 9
R_OUT = V_IN/I
V_IN = ±2V
A
T2_OUT
T1_OUT
FIGURE 2. POWER-OFF SOURCE RESISTANCE
CONFIGURATION
550
10
500
450 ^TA ^{= 25oC}
EXTERNAL SUPPLY LOAD
400 1kΩ BETWEEN V+ + GND
OR V- + GND
350 _{TRANSMITTER OUTPUT}
OPEN CIRCUIT
300
250
V+ SUPPLY
200
V- SUPPLY
GUARANTEED
OPERATING
RANGE
150
3
4
5
6
INPUT SUPPLY VOLTAGE V_CC (V)
FIGURE 3. V+, V- OUTPUT IMPEDANCES vs V_CC
9
V+ (V_CC = 5V)
8
V+ (V_CC = 4.5V)
7
6
V- (V_CC = 4.5V)
V- (V_CC = 5V)
5
4 ^{TA = 25oC}
TRANSMITTER OUTPUTS
OPEN CIRCUIT
3
0 1 2 3 4 5 6 7 8 9 10
|I_LOAD| (mA)
FIGURE 4. V+, V- OUTPUT VOLTAGES vs LOAD CURRENT
Pin Descriptions
PDIP, CERDIP
1
2
3
4
5
6
7
8
9
10
11
SOIC
1
2
3
4
5
6
7
8
9
10
11
PIN NAME
C1+
V+
C1-
C2+
C2-
V-
T2_OUT
R2_IN
R2out
T2_IN
T1_IN
DESCRIPTION
External capacitor “+” for internal voltage doubler.
Internally generated +10V (typical) supply.
External capacitor “-” for internal voltage doubler.
External capacitor “+” internal voltage inverter.
External capacitor “-” internal voltage inverter.
Internally generated -10V (typical) supply.
RS-232 Transmitter 2 output ±10V (typical).
RS-232 Receiver 2 input, with internal 5K pulldown resistor to GND.
Receiver 2 TTL/CMOS output.
Transmitter 2 TTL/CMOS input, with internal 400K pullup resistor to V_CC.
Transmitter 1 TTL/CMOS input, with internal 400K pullup resistor to V_CC.
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