Datasheet

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PARAMETER MEASUREMENT INFORMATION
I
OS(L)
−I
OS(H)
V
I
V
O
V
DD
or GND
V
SS
or GND
R
L
= 3 kΩ
−I
IL
I
IH
V
I
V
I
Pulse
Generator
(see Note B)
C
L
(see Note A)
R
L
3 V
0 V
1.5 V
1.5 V
Input
t
PHL
t
PLH
90%
50%
10%
50%
10%
90%
t
THL
t
TLH
V
OH
V
OL
TEST CIRCUIT VOLTAGE WAVEFORMS
Input
Output
Output
V
I
V
T
,
V
I
I
OL
V
OH
−I
OH
V
OL
SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS181D–DECEMBER 1994 – REVISED JANUARY 2006
Figure 1. Driver Test Circuit for V
OH
,V
OL
,I
OS(H)
,andI
OS(L)
Figure 2. Driver Test Circuit for I
IH
and I
IL
A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: t
w
=25μs, PRR = 20 kHz, Z
O
=50Ω,t
r
=t
f
<50ns.
Figure 3. Driver Test Circuit and Voltage Waveforms
Figure 4. Receiver Test Circuit for I
OS
Figure 5. Receiver Test Circuit for V
T
,V
OH
,andV
OL
8