GD75232
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS206C – MAY 1995 – REVISED JULY 1998
PARAMETER MEASUREMENT INFORMATION
IOS(L)
VDD
VCC
– IOS(H)
VSS or GND
VI
VO
RL = 3 kΩ
VDD or GND
VSS
Figure 1. Driver Test Circuit for V
OH
, V
OL
, I
OS(H)
, and I
OS(L)
VDD
VCC
IIH
VI
– IIL
VI
VSS
Figure 2. Driver Test Circuit for I
IH
and I
IL
3V
VDD
Input V
CC
Pulse
Generator
See Note A
VSS
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A.
B.
The pulse generator has the following characteristics: tw = 25
µs,
PRR = 20 kHz, ZO = 50
Ω,
tr = tf < 50 ns.
CL includes probe and jig capacitance.
RL
Input
1.5 V
1.5 V
0V
t PHL
CL
(see Note B)
Output
t THL
90%
t PLH
90%
VOH
VOL
t TLH
50%
10%
50%
10%
Figure 3. Driver Test Circuit and Voltage Waveforms
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
7
TI [ TEXAS INSTRUMENTS ]
