MAX232, MAX232I
DUAL EIA-232 DRIVER/RECEIVER
SLLS047G – FEBRUARY 1989 – REVISED AUGUST 1998
PARAMETER MEASUREMENT INFORMATION
VCC
Pulse
Generator
(see Note A)
R1IN
or
R2IN
R1OUT
or
R2OUT
RL = 1.3 kΩ
See Note C
CL = 50 pF
(see Note B)
TEST CIRCUIT
≤
10 ns
90%
50%
90%
50%
≤
10 ns
3V
10%
tPLH
VOH
Output
1.5 V
1.5 V
WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: ZO = 50
Ω,
duty cycle
≤
50%.
B. CL includes probe and jig capacitance.
C. All diodes are 1N3064 or equivalent.
VOL
0V
Input
10%
500 ns
tPHL
Figure 1. Receiver Test Circuit and Waveforms for t
PHL
and t
PLH
Measurements
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265