5-V DUAL RS-232 LINE DRIVER/RECEIVER
WITH
±15-kV
ESD PROTECTION
SLLS576E – JULY 2003 – REVISED APRIL 2007
www.ti.com
PARAMETER MEASUREMENT INFORMATION
Input
Generator
(see Note B)
RS-232
Output
50
W
R
L
C
L
(see Note A)
Output
TEST CIRCUIT
SR(tf) =
t
PHL (D)
3V
–3 V
6V
t
PHL(D
)
or t
PLH(D)
VOLTAGE WAVEFORMS
3V
–3 V
3V
1.5 V
1.5 V
0V
t
PLH (D)
V
OH
V
OL
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 120 kbit/s, Z
O
= 50
W
, 50% duty cycle, t
r
£
10 ns, t
f
£
10 ns.
Figure 1. Driver Slew Rate
3V
Generator
(see Note B)
RS-232
Output
50
W
R
L
C
L
(see Note A)
Output
TEST CIRCUIT
Input
1.5 V
t
PHL (D)
50%
VOLTAGE WAVEFORMS
1.5 V
0V
t
PLH (D)
V
OH
50%
V
OL
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 120 kbit/s, Z
O
= 50
W
, 50% duty cycle, t
r
£
10 ns, t
f
£
10 ns.
Figure 2. Driver Pulse Skew
3V
1.5 V
1.5 V
–3 V
t
PHL (R)
Output
TEST CIRCUIT
50%
VOLTAGE WAVEFORMS
t
PLH (R)
V
OH
50%
V
OL
Input
Generator
(see Note B)
Output
50
W
C
L
(see Note A)
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: Z
O
= 50
W
, 50% duty cycle, t
r
£
10 ns, t
f
£
10 ns.
Figure 3. Receiver Propagation Delay Times
6
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