Datasheet
ST202
3/10
ELECTRICAL CHARACTERISTICS
(C
1
- C
4
= 0.1µF, V
CC
= 5V ± 10%, T
A
= -40 to 85°C, unless otherwise specified.
Typical values are referred to T
A
= 25°C)
TRANSMITTER ELECTRICAL CHARACTERISTICS
(C
1
- C
4
= 0.1µF, V
CC
= 5V ± 10%, T
A
= -40 to 85°C, unless otherwise specified.
Typical values are referred to T
A
= 25°C)
Note 1: Measured from 3V to -3V or from -3V to 3V.
Note2: One trasmitter output is loaded with R
L
= 3KΩ to 7KΩ, C
L
= 50 to 1000pF
RECEIVER ELECTRICAL CHARACTERISTICS
(C
1
- C
4
= 0.1µF, V
CC
= 5V ± 10%, T
A
= -40 to 85°C, unless otherwise specified.
Typical values are referred to T
A
= 25°C)
Note 1: RS-232 IN to TTL-CMOS OUT (from 50% to 50%)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
SUPPLY
V
CC
Power Supply Current No Load 1.5 4 mA
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
TOUT
Output Voltage Swing All Transmitter outputs are loaded with
3KΩ to GND
± 5 ± 9V
I
TIL
Logic Pull-Up Current T
IN
= 0V 5 40 µA
V
TIL
Input Logic Threshold Low 0.8 1.4 V
V
TIH
Input Logic Threshold High 1.4 2 V
SR
T
Transition Slew Rate T
A
= 25°C, V
CC
= 5V
R
L
= 3 to 7KΩ,C
L
= 50 to 2500pF
(Note1)
61230V/µs
D
R
Data Rate (Note 2) 200 400 Kbits/s
R
TOUT
Transmitter Output
Resistance
V
CC
= V+ = V- = 0V V
OUT
= ± 2V 300 Ω
I
SC
Transmitter Output Short
Circuit Current
one T
XOUT
to GND ± 7 ± 22 mA
t
dT
Propagation Delay Time TTL-CMOS IN to RS-232 OUT
C
L
= 150pF (50% to 50%)
1.3 3.5 µs
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
RIN
Receiver Input Voltage
Operating Range
-30 30 V
R
RIN
RS-232 Input Resistance T
A
= 25°C 3 5 7 KΩ
V
RIL
RS-232 Input Threshold
Low
0.8 1.3 V
V
RIH
RS-232 Input Threshold
High
1.8 2.4 V
V
RIHYS
RS-232 Input Hysteresis V
CC
= 5V 0.2 0.5 1 V
V
ROL
TTL/CMOS Output Voltage
Low
I
OUT
= 3.2mA (to V
CC
) 0.2 0.4 V
V
ROH
TTL/CMOS Output Voltage
High
I
OUT
= 1mA (to GND) 3.5 V
CC
-0.2 V
I
SCR
Receiver Output Short
Circuit Current
to GND
to V
CC
2
10
10
30
mA
mA
t
dR
Propagation Delay Time C
L
= 150pF (Note 1) 0.1 0.5 µs