74ACT257M STMICROELECTRONICS [STMicroelectronics], 74ACT257M Datasheet - Page 5

• Manufacturer Part Number: 74ACT257M
• Description: QUAD 2 CHANNEL MULTIPLEXER 3-STATE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

AC ELECTRICAL CHARACTERISTICS (C
(*) Voltage range is 5V 0.5V
CAPACITIVE CHARACTERISTICS
1) C
Test Circuit). Average operating current can be obtained by the following equation. I
TEST CIRCUIT
C
R
R
Symbol
Symbol
t
t
t
PLH
PZL
PZH
L
L
T
C
= 50 pF or equivalent (includes jig and probe capacitance)
= R
=Z
t
t
t
t
t
t
C
t
t
PD
C
PLH
PHL
PLH
PHL
PZL
PZH
PLZ
PHZ
OUT
, t
, t
, t
PD
IN
1
OUT
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to
PLZ
= 500 or equivalent
PHL
PHZ
of pulse generator (typically 50 )
Propagation Delay Time
A, B to Y
Propagation Delay Time
SEL to Y
Output Enable Time
Output Disable Time
Input Capacitance
Input Capacitance
Power Dissipation
Capacitance (note 1)
Parameter
Parameter
TEST
5.0
5.0
5.0
5.0
V
V
5.0
5.0
(V)
(V)
5.0
CC
CC
(*)
(*)
(*)
(*)
Test Con dition s
T est Cond ition
L
= 50 pF, R
L
CC
= 500 , Input t
(opr) = C
Min.
Min.
PD
V
T
T
CC
A
A
Typ.
Typ.
f
= 25
= 25
IN
5.0
6.0
5.0
6.0
31
4
8
+ I
r
= t
CC
/n (per circuit)
o
o
f
C
C
Value
Value
Max.
Max.
=3 ns)
7.0
9.0
8.0
9.0
SWITCH
-40 to 85
-40 to 85
Min .
Min .
Open
Open
2V
CC
Max.
Max.
10.0
10.0
8.0
9.0
74ACT257
o
o
C
C
Unit
Unit
pF
pF
pF
ns
ns
ns
ns
5/10