TC232*
*Patented
DUAL RS-232 TRANSMITTER/RECEIVER AND POWER SUPPLY
FEATURES
GENERAL DESCRIPTION
■ Meets All RS-232 Specifications
■ Operates From Single 5V Power Supply
■ 2 Drivers and 2 Receivers
The TC232 is a dual RS-232 transmitter/receiver that
complies with EIA /TIA RS-232E guidelines and is ideal for
all RS-232 communication links. This device operates from
a 5V power supply and contains two charge pump voltage
converters that produce ±10V power supplies.
The TC232 has four level translators. Two are RS-232
transmitters that convert TTL/CMOS input levels to 9V
RS-232 outputs. The other two translators are RS-232
receivers that convert RS-232 inputs to 5V TTL/CMOS
output levels. The receivers have a nominal threshold of
1.3V, a typical hysteresis of 0.5V, and can operate with
inputs up to ±30V.
■ On-Board Voltage Quadrupler
■ Input Levels.......................................................±30V
■ Output Swing With +5V Supply .........................±9V
■ Low Supply Current ........................................ 5 mA
■ Does not require external ±12V supplies
APPLICATIONS
■ RS-232C Communication Links
■ Modems, peripherals, computers
■ Battery-powered systems
ORDERING INFORMATION
PIN CONFIGURATIONS (DIP and SOIC)
Part No.
Package
Temp. Range
+
+
C
C
1
2
3
4
5
6
7
8
16
V
1
2
3
4
5
6
7
8
16 V
CC
1
+
CC
1
+
V
15 GND
14 T1
V
15 GND
14 T1
TC232COE
TC232CPE
TC232EOE
TC232EPE
TC232IJE
16-Pin SOIC (Wide)
16-Pin Plastic DIP
16-Pin SOIC (Wide)
16-Pin Plastic DIP
16-Pin CerDIP
0°C to +70°C
0°C to +70°C
–
–
C
C
1
1
OUT
OUT
+
+
C
R1
C
R1
13
12 R1
13
12 R1
IN
IN
2
2
–
–
C
C
TC232CPE
TC232EPE
TC232IJE
TC232MJE
TC232COE
TC232EOE
– 40°C to +85°C
– 40°C to +85°C
– 25°C to +85°C
– 55°C to +125°C
2
2
OUT
IN
OUT
IN
–
–
V
T1
T2
V
T1
T2
11
10
9
11
10
9
T2
T2
OUT
R2
OUT
R2
IN
IN
IN
IN
R2
R2
OUT
OUT
TC232MJE
16-Pin CerDIP
TYPICAL APPLICATION
+5V INPUT
C3*
10 µF
+
+
10 µF
16
1
+
V
C
+
+
CC
2
1
–
C1
10 µF
+
+5V TO +10V
V
3
4
C
+10V
–10V
VOLTAGE DOUBLER
1
+
C3*
10 µF
+
2
–
2
C
C
C2
10 µF
–
+10V TO –10V
VOLTAGE INVERTER
V
5
6
C4
10 µF
+5V
+5V
+
400 kΩ
T1
T2
T1
OUT
14
11
IN
T1
RS-232
OUTPUTS
TTL/CMOS
INPUTS
400 kΩ
T2
OUT
7
10
12
9
IN
T2
R1
R2
R1
13
8
OUT
IN
IN
R1
R2
5 kΩ
5 kΩ
TTL/CMOS
OUTPUTS
RS-232
INPUTS
R2
OUT
GND
15
*NOTE: C3 can be connected between
V+ and V for convenience.
CC
© 2001 Microchip Technology Inc. DS21396A
TC232-6 10/21/96