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TEST CIRCUIT
VOLTAGE WAVEFORMS
50 Ω
Generator
(see Note B)
3 V or 0 V
Output
V
OL
V
OH
t
PZH
(S1 at GND)
t
PLZ
(S1 at V
CC
)
t
PHZ
(S1 at GND)
t
PZL
(S1 at V
CC
)
1.5 V1.5 V
3 V
0 V
50%
0.3 V
Output
Input
50%
0.3 V
EN
R
L
S1
V
CC
GND
C
L
(see Note A)
Output
TRS3223E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ± 15-kV ESD PROTECTION
SLLS794 – JUNE 2007
PARAMETER MEASUREMENT INFORMATION (continued)
A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: Z
O
= 50 Ω , 50% duty cycle, t
r
≤ 10 ns, t
f
≤ 10 ns.
Figure 4. Receiver Enable and Disable Times
9
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