Datasheet
DS26C31M, DS26C31T
www.ti.com
SNLS375B –JUNE 1998–REVISED APRIL 2013
Switching Characteristics (continued)
V
CC
= 5V ±10%, t
r
≤ 6 ns, t
f
≤ 6 ns (Figure 3, Figure 4, Figure 5, Figure 6)
(1)
Symbol Parameter Conditions Min Typ Max Units
DS26C31T CS26C31M
t
PHZ
Output Disable Time
(3)
S1 Closed 5 9 12 ns
t
PLZ
Output Disable Time
(3)
S1 Closed 7 11 14 ns
C
PD
Power Dissipation Capacitance
(4)
50 pF
C
IN
Input Capacitance 6 pF
(3) Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off. The actual disable times
are less than indicated due to the delay added by the RC time constant of the load.
(4) C
PD
determines the no load dynamic power consumption, P
D
= C
PD
V
CC
2 f + I
CC
V
CC
, and the no load dynamic current consumption, I
S
= C
PD
V
CC
f + I
CC
.
Comparison Table of Switching Characteristics into “LS-Type” Load
V
CC
= 5V, T
A
= 25°C, t
r
≤ 6 ns, t
f
≤ 6 ns (Figure 4, Figure 6, Figure 7, Figure 8)
(1)
DS26C31T DS26LS31C
Symbol Parameter Conditions Units
Typ Max Typ Max
t
PLH
, t
PHL
Propagation Delays Input to Output C
L
= 30 pF
S1 Closed 6 8 10 15 ns
S2 Closed
Skew See
(2)
C
L
= 30 pF
S1 Closed 0.5 1.0 2.0 6.0 ns
S2 Closed
t
THL
, t
TLH
Differential Output Rise and Fall C
L
= 30 pF
Times
S1 Closed 4 6 ns
S2 Closed
t
PLZ
Output Disable Time
(3)
C
L
= 10 pF
S1 Closed 6 9 15 35 ns
S2 Open
t
PHZ
Output Disable Time
(3)
C
L
= 10 pF
S1 Open 4 7 15 25 ns
S2 Closed
t
PZL
Output Enable Time C
L
= 30 pF
S1 Closed 14 20 20 30 ns
S2 Open
t
PZH
Output Enable Time C
L
= 30 pF
S1 Open 11 17 20 30 ns
S2 Closed
(1) This table is provided for comparison purposes only. The values in this table for the DS26C31 reflect the performance of the device but
are not tested or verified.
(2) Skew is defined as the difference in propagation delays between complementary outputs at the 50% point.
(3) Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off. The actual disable times
are less than indicated due to the delay added by the RC time constant of the load.
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