Electrical characteristics
ST202B - ST202C
Table 6.
Receiver electrical characteristics
(C
1
- C
4
= 0.1碌F, V
CC
= 5V 鹵 10%, T
A
= -40 to 85擄C, unless otherwise specified. Typical
values are referred to T
A
= 25擄C).
Parameter
Receiver input voltage
operating range
RS-232 Input resistance
RS-232 Input threshold low
RS-232 Input threshold high
RS-232 Input hysteresis
TTL/CMOS Output voltage low
V
CC
= 5V
I
OUT
= 3.2mA (to V
CC
)
3.5
2
10
0.2
T
A
= 25擄C
Test condition
Min.
-30
3
0.8
5
1.3
1.8
0.5
0.2
V
CC
-0.2
10
mA
to V
CC
C
L
= 150pF
(1)
30
0.1
0.5
渭s
2.4
1
0.4
Typ.
Max.
30
7
Unit
V
K惟
V
V
V
V
V
Symbol
V
RIN
R
RIN
V
RIL
V
RIH
V
RIHYS
V
ROL
V
ROH
I
SCR
t
DR
TTL/CMOS Output voltage high I
OUT
= 1mA (to GND)
Receiver output short circuit
current
Propagation delay time
to GND
1. RS-232 in to TTL-CMOS out (from 50% to 50%)
6/18