Datasheet

SN75LBC187
MULTICHANNEL EIA-232 DRIVER/RECEIVER
WITH CHARGE PUMP
SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
CC
4.5 5 5.5 V
High level in
p
ut voltage V
IH
DA 2
V
High
-
le
v
el
inp
u
t
v
oltage
,
V
IH
RA, SHUTDOWN 2.4
V
Low-level input voltage, V
IL
RA, DA, SHUTDOWN 0.8 V
Receiver input voltage, V
I
–25 25 V
High-level output current, I
OH
RY –1 mA
Low-level output current, I
OL
RY 3.2 mA
Out
p
ut current I
O
V
DD
±10 µA
O
u
tp
u
t
c
u
rrent
,
I
O
V
SS
±10 µA
C1, C2, C3, C4 charge pump capacitors 0.1 0.47 µF
Operating free-air temperature, T
A
0 70 °C
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
OH
High level out
p
ut voltage
Receiver I
O
= –1 mA 3.5
V
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
Driver R
L
= 3 kΩ to GND 5 7
V
V
OL
Low level out
p
ut voltage
Receiver I
O
= 3.2 mA 0.4
V
V
OL
Lo
w-
le
v
el
o
u
tp
u
t
v
oltage
Driver R
L
= 3 kΩ to GND –7 –5
V
V
IT+
Receiver positive-going input voltage threshold 1.7 2.4 V
V
IT–
Receiver negative-going input voltage threshold 0.8 1.2 V
V
hys
Receiver input hysteresis voltage (V
IT+
– V
IT–
) 0.5 1 V
r
i
Receiver input resistance V
CC
= 5 V, T
A
= 25°C 3 5 7 kΩ
r
o
Driver output resistance V
CC
= 0, V
O
= ±2 V 300 Ω
I
I
Input current (DA, SHUTDOWN) V
I
= 0 to V
CC
±50 µA
I
OS
Driver output short-circuit current V
O
= 0 ±10 mA
I
CC
Su
pp
ly current
Normal operation All outputs open, SHUTDOWN at 2.4 V 15 30 mA
I
CC
S
u
ppl
y
c
u
rrent
Shutdown mode All outputs open, SHUTDOWN at 0.1 V 10 µA
†
All typical values are at V
CC
= 5 V and T
A
= 25°C.