DS26C31M, DS26C31T
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SNLS375B –JUNE 1998–REVISED APRIL 2013
Switching Characteristics (continued)
VCC = 5V ±10%, tr ≤ 6 ns, tf ≤ 6 ns (Figure 3, Figure 4, Figure 5, Figure 6)(1)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DS26C31T
CS26C31M
tPHZ
tPLZ
CPD
CIN
Output Disable Time(3)
Output Disable Time(3)
Power Dissipation Capacitance(4)
Input Capacitance
S1 Closed
S1 Closed
5
7
9
12
14
ns
ns
pF
pF
11
50
6
(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) CPD determines the no load dynamic power consumption, PD = CPD VCC2 f + ICC VCC, and the no load dynamic current consumption, IS
= CPD VCC f + ICC
.
Comparison Table of Switching Characteristics into “LS-Type” Load
(1)
VCC = 5V, TA = 25°C, tr ≤ 6 ns, tf ≤ 6 ns (Figure 4, Figure 6, Figure 7, Figure 8)
DS26C31T
DS26LS31C
Symbol
tPLH, tPHL
Parameter
Conditions
Units
Typ
Max
Typ
Max
Propagation Delays Input to Output CL = 30 pF
S1 Closed
S2 Closed
6
8
10
15
ns
Skew
tTHL, tTLH
tPLZ
See(2)
CL = 30 pF
S1 Closed
S2 Closed
CL = 30 pF
S1 Closed
S2 Closed
CL = 10 pF
S1 Closed
S2 Open
0.5
4
1.0
6
2.0
6.0
ns
ns
ns
ns
ns
ns
Differential Output Rise and Fall
Times
Output Disable Time(3)
Output Disable Time(3)
Output Enable Time
Output Enable Time
6
9
15
15
20
20
35
25
30
30
tPHZ
CL = 10 pF
S1 Open
4
7
S2 Closed
CL = 30 pF
S1 Closed
S2 Open
tPZL
14
11
20
17
tPZH
CL = 30 pF
S1 Open
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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