Datasheet

ST202E/ST232E
4/14
RECEIVER ELECTRICAL CHARACTERISTICS
(C
1
-C
4
=0.1µF for ST202E, C
1
-C
4
=1µF for ST232E, V
CC
=5V± 10%, T
A
= -40 to 125°C,
unless otherwise specified. Typical values are referred to T
A
= 25°C)
APPLICATION CIRCUITS (note1,note2)
Note 1: C
1-4
capacitors can even be 1µFones.
Note 2: C
1-4
canbecommonorbiasedcapacitors.
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, V
CC
=5V 3 5 7 KΩ
V
RIL
RS-232 Input Logic
Threshold Low
T
A
= 25°C, V
CC
= 5 V 0.8 1.2 V
V
RIH
RS-232 Input Logic
Threshold High
T
A
= 25°C, V
CC
= 5 V 1.7 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 0.4 V
V
ROH
TTL/CMOS Output Voltage
High
I
OUT
= -1mA 3.5 V
CC
-0.4 V
t
DR
Receiver Propagation Delay C
L
= 150pF 0.5 10 µs