SLLS350L − APRIL 1999 − REVISED MARCH 2004
MAX3243
3 V TO 5.5 V MULTICHANNEL RS 232 LINE DRIVER/RECEIVER
WITH
±15
kV ESD (HBM) PROTECTION
PARAMETER MEASUREMENT INFORMATION
3V
RS-232
Output
50
Ω
RL
3V
FORCEOFF
TEST CIRCUIT
CL
(see Note A)
Output
Input
1.5 V
1.5 V
0V
tPHL
50%
tPLH
VOH
50%
VOL
VOLTAGE WAVEFORMS
Generator
(see Note B)
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50
Ω,
50% duty cycle, tr
≤
10 ns, tf
≤
10 ns.
Figure 2. Driver Pulse Skew
3 V or 0 V
FORCEON
Output
Generator
(see Note B)
50
Ω
3V
FORCEOFF
CL
(see Note A)
Output
tPHL
tPLH
VOH
50%
50%
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
3V
1.5 V
1.5 V
−3 V
Input
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: ZO = 50
Ω,
50% duty cycle, tr
≤
10 ns, tf
≤
10 ns.
Figure 3. Receiver Propagation Delay Times
3V
Input
3 V or 0 V
FORCEON
VCC
S1
GND
tPHZ
(S1 at GND)
Output
Output
FORCEOFF
Generator
(see Note B)
50
Ω
CL
(see Note A)
0.3 V
tPLZ
(S1 at VCC)
0.3 V
Output
50%
VOL
TEST CIRCUIT
NOTES: A.
B.
C.
D.
VOLTAGE WAVEFORMS
tPZL
(S1 at VCC)
50%
1.5 V
1.5 V
0V
tPZH
(S1 at GND)
VOH
RL
3 V or 0 V
CL includes probe and jig capacitance.
The pulse generator has the following characteristics: ZO = 50
Ω,
50% duty cycle, tr
≤
10 ns, tf
≤
10 ns.
tPLZ and tPHZ are the same as tdis.
tPZL and tPZH are the same as ten.
Figure 4. Receiver Enable and Disable Times
8
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
