Datasheet

DS36954
SNLS077C –JULY 1998–REVISED APRIL 2013 www.ti.com
Switching Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
DRIVER SINGLE-ENDED CHARACTERISTICS
t
PZH
Output Enable Time to High Level R
L
= 110Ω (Figure 6 ) 35 40 ns
t
PZL
Output Enable Time to Low Level (Figure 8 ) 25 40 ns
t
PHZ
Output Disable Time to High Level (Figure 6 ) 15 25 ns
t
PLZ
Output Disable Time to Low Level (Figure 8 ) 35 40 ns
DRIVER DIFFERENTIAL CHARACTERISTICS
t
r
, t
f
Rise and Fall Time R
L
= 54Ω 13 16 ns
C
L
= 50 pF
t
PLHD
Differential Propagation 9 15 19 ns
C
D
= 15 pF
t
PHLD
Delays
(2)
9 12 19 ns
(Figure 3 Figure 4
(1)
)
t
SKD
|t
PLHD
− t
PHLD
| Diff. Skew 3 6 ns
RECEIVER CHARACTERISTICS
t
PLHD
Differential Propagation Delays C
L
= 15 pF 9 14 19 ns
V
CM
= 2.0V
t
PHLD
9 13 19 ns
(Figure 10 )
t
SKD
|t
PLHD
− t
PHLD
| Diff. Receiver Skew 1 3 ns
t
PZH
Output Enable Time to High Level C
L
= 15 pF 15 22 ns
(Figure 15 )
t
PZL
Output Enable Time to Low Level 20 30 ns
t
PHZ
Output Disable Time from High Level 20 30 ns
t
PLZ
Output Disable Time from Low Level 17 25 ns
(1) Propagation Delay Timing for Calculations of Driver Differential Propagation Delays
(2) Differential propagation delays are calculated from single-ended propagation delays measured from driver input to the 20% and 80%
levels on the driver outputs (Figure 16) .
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