Datasheet

6
Propagation Delay,
OE to Y
AC/ACT257
t
PLZ
, t
PHZ
,
t
PZL
, t
PZH
5 4.1 - 14.6 4 - 16.1 ns
Propagation Delay,
In to Y
’AC/CD74ACT258
t
PLH
, t
PHL
5 2.4 - 8.5 2.3 - 9.3 ns
Propagation Delay,
S to Y
’AC/CD74ACT258
t
PLH
, t
PHL
5 4 - 14 3.9 - 15.4 ns
Propagation Delay,
OE to Y
’AC/CD74ACT258
t
PLZ
, t
PHZ
,
t
PZL
, t
PZH
5 4.1 - 14.6 4 - 16.1 ns
Three-State Output
Capacitance
C
O
- - -15- -15pF
Input Capacitance C
I
- - -10- -10pF
Power Dissipation Capacitance C
PD
(Note 11)
- - 130 - - 130 - pF
NOTES:
8. Limits tested 100%.
9. 3.3V Min is at 3.6V, Max is at 3V.
10. 5V Min is at 5.5V, Max is at 4.5V.
11. C
PD
is used to determine the dynamic power consumption per multiplexer.
AC: P
D
= C
PD
V
CC
2
f
i
+ ∑ (C
L
V
CC
2
f
o
)
ACT: P
D
=C
PD
V
CC
2
f
i
+ ∑ (C
L
V
CC
2
f
o
)+V
CC
∆I
CC
where f
i
= input frequency, f
o
= output frequency, C
L
= output load capacitance,
V
CC
= supply voltage.
FIGURE 1. THREE-STATE PROPAGATION DELAY TIMES AND TEST CIRCUIT
Switching Specifications Input t
r
, t
f
= 3ns, C
L
= 50pF (Worst Case) (Continued)
PARAMETER SYMBOL V
CC
(V)
-40
o
C TO 85
o
C -55
o
C TO 125
o
C
UNITSMIN TYP MAX MIN TYP MAX
DUT
WITH
THREE-
STATE
OUTPUT
INPUT LEVEL
90%
V
S
10%
GND
t
f
= 3ns
t
PZL
t
PZH
t
PLZ
t
PHZ
OUTPUTS
ENABLED
OUTPUTS
DISABLED
OUTPUT: LOW
TO OFF TO LOW
OUTPUT: HIGH
TO OFF TO HIGH
OTHER
INPUTS
(TIED HIGH
OR LOW)
OUTPUT
DISABLE
C
L
50pF
500
Ω
†
R
L
500
Ω
†
R
L
OUT
V
S
0.2V
CC
V
OL
(≠GND)
V
OH
(≠V
CC
)
0.8 V
CC
V
S
GND (t
PHZ,
t
PZH
)
OUTPUTS
ENABLED
OPEN (t
PHL,
t
PLH
)
2 V
CC
(t
PLZ,
t
PZL
)
(OPEN DRAIN)
t
r
= 3ns
OUTPUT
DISABLE
†FOR AC SERIES ONLY: WHEN V
CC
= 1.5V, R
L
= 1kΩ
CD54/74AC257, CD54/74ACT257, CD74ACT258