Datasheet

V
OD(PP)
V
OD(RING)
V
OD(RING)
V
OD(SS)
0 V Differential
V
OD(SS)
50 Ω
C
L
=50pF
Signal
Generator
DE
D
0Vor3V
3 V if Testing A Output
0 V if Testing B Output
A
B
R
L
= 110 Ω
Output
S1
t
PZH
t
PHZ
0.5V
DE
Output
1.5V 1.5V
2.5V
3V
0V
V
OH
V
Off
0
50 Ω
C
L
=50pF
Signal
Generator
DE
D
0Vor3V
0 V if Testing A Output
3 V if Testing B Output
R
L
= 110 Ω
Output
S1
t
PZL
t
PLZ
0.5V
DE
Output
1.5V 1.5V
2.5V
3V
0V
5V
V
OL
5V
SN65HVD21A
SLLSE36 –DECEMBER 2010 www.ti.com
PARAMETER MEASUREMENT INFORMATION (continued)
NOTE: V
OD(RING)
is measured at four points on the output waveform, corresponding to overshoot and undershoot from the
V
OD(H)
and V
OD(L)
steady state values.
Figure 5. V
OD(RING)
Waveform and Definitions
Figure 6. Driver Enable/Disable Test, High Output
Figure 7. Driver Enable/Disable Test, Low Output
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