Datasheet

Electrical characteristics ST202B - ST202C
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Table 6. Receiver electrical characteristics
(C
1
- C
4
= 0.1 µF, V
CC
= 5 V ± 10 %, T
A
= -40 to 85 °C, unless otherwise specified. Typical
values are referred to T
A
= 25 °C).
Symbol Parameter Test condition 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
)0.20.4V
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 2 10
mA
to V
CC
10 30
t
DR
Propagation delay time C
L
= 150pF
(1)
0.1 0.5 µs
1. RS-232 in to TTL-CMOS out (from 50% to 50%)