ꢀ ꢁ ꢂ ꢃꢄ ꢃ ꢅ ꢀ ꢁꢂ ꢃꢄ ꢃ ꢆ
ꢇ ꢈꢁꢉ ꢊꢆ ꢁ ꢋꢃ ꢄꢃ ꢇ ꢌꢆ ꢍ ꢊ ꢌꢎ ꢏꢌ ꢊ ꢐꢊ ꢆ ꢍꢊ ꢌ ꢎ
ꢑ
ꢑ
SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004
PARAMETER MEASUREMENT INFORMATION
T1IN or T2IN
T1OUT or T2OUT
Pulse
EIA-232 Output
Generator
(see Note A)
C
= 10 pF
L
R
L
(see Note B)
TEST CIRCUIT
≤10 ns
≤10 ns
3 V
0 V
90%
50%
90%
50%
Input
10%
10%
5 µs
t
PLH
90%
t
PHL
V
OH
90%
Output
10%
10%
V
OL
t
TLH
)
t
THL
0.8 (V
– V
)
0.8 (V
– V
OH
t
OL
OL
t
OH
SR +
or
TLH
THL
WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: Z = 50 Ω, duty cycle ≤ 50%.
O
B.
C includes probe and jig capacitance.
L
Figure 2. Driver Test Circuit and Waveforms for t
and t
Measurements (5-µs Input)
PHL
PLH
Pulse
Generator
(see Note A)
EIA-232 Output
3 kΩ
C
= 2.5 nF
L
TEST CIRCUIT
≤10 ns
≤10 ns
Input
90%
1.5 V
90%
1.5 V
10%
10%
20 µs
t
TLH
t
THL
3 V
V
V
OH
3 V
Output
−3 V
6 V
−3 V
OL
SR +
t
or t
THL
TLH
WAVEFORMS
NOTE A: The pulse generator has the following characteristics: Z = 50 Ω, duty cycle ≤ 50%.
O
Figure 3. Test Circuit and Waveforms for t
and t
Measurements (20-µs Input)
THL
TLH
6
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