Datasheet

SN75LBC187
MULTICHANNEL EIA-232 DRIVER/RECEIVER
WITH CHARGE PUMP
SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
Output
(see Note B)
Input
V
OL
V
OH
10%
90%
–3 V
3 V
t
PHL
t
PLH
Output
I
O
V
CC
Input
V
IT,
V
I
V
O
5 kΩ
C
L
= 50 pF
(see Note A)
V
CC
1.5 kΩ
V
IH
V
IL
Figure 1. Receiver Test Circuit and Waveforms
–3 V
–3 V
3 V
3 V
t
r
t
f
0 V
3 V
50%50%
Output
Input
V
OH
t
PHL
t
PLH
Output
I
O
V
CC
Input
V
O
V
IT,
V
I
3 kΩ
V
OL
C
L
= 1200 pF
(see Note A)
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: t
w
= 8.33 µs, PRR = 60 kHz, t
r
= t
f
≤ 50 ns.
Figure 2. Driver Test Circuit and Waveforms