3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH
±15-kV
IEC ESD PROTECTION
SLLS664A – AUGUST 2005 – REVISED APRIL 2007
www.ti.com
PARAMETER MEASUREMENT INFORMATION
Input
Generator
(see Note B)
RS-232
Output
50
Ω
R
L
C
L
(see Note A)
Output
TEST CIRCUIT
t
THL
3V
−3 V
SR(tr) +
6V
or t
VOLTAGE WAVEFORMS
TLH
3V
−3 V
3V
1.5 V
1.5 V
0V
t
TLH
V
OH
V
OL
t
THL
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z
O
= 50
Ω,
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
Ω
R
L
C
L
(see Note A)
Output
TEST CIRCUIT
Input
t
PHL
50%
VOLTAGE WAVEFORMS
1.5 V
1.5 V
0V
t
PLH
V
OH
50%
V
OL
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z
O
= 50 Ω, 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
50%
VOLTAGE WAVEFORMS
t
PLH
V
OH
Output
TEST CIRCUIT
50%
V
OL
Input
Output
Generator
(see Note B)
50
Ω
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
Ω,
50% duty cycle, t
r
≤
10 ns, t
f
≤
10 ns.
Figure 3. Receiver Propagation Delay Times
6
TI [ TEXAS INSTRUMENTS ]
