CD54HCT257 Datasheet, PDF (5/12 Pages) Texas Instruments – High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

CD54HC257, CD74HC257, CD54HCT257, CD74HCT257
Switching Specifications Input t_r, t_f = 6ns
PARAMETER
HC TYPES
Propagation Delay
In to Y
TEST
SYMBOL CONDITIONS V_CC (V)
t_PLH, t_PHL C_L = 50pF
2
4.5
25^oC
TYP MAX
-40^oC TO 85^oC -55^oC TO 125^oC
MAX
MAX
UNITS
-
150
190
-
30
38
225
ns
45
ns
C_L = 15pF
5
12
-
-
CL = 50pF
6
-
26
33
-
ns
38
ns
Propagation Delay
S to Y
t_PLH, t_PHL C_L = 50pF
2
-
175
220
4.5
-
35
44
265
ns
53
ns
C_L = 15pF
5
14
-
-
CL = 50pF
6
-
30
37
-
ns
45
ns
Propagation Delay
OE to Y
t_PLZ, t_PHZ, CL = 50pF
2
-
150
190
t_PZL, t_{PZH CL = 50pF}
4.5
-
30
38
C_L = 15pF
5
12
-
-
CL = 50pF
6
-
26
33
225
ns
45
ns
-
ns
38
ns
Output Transition Times
t_TLH, t_THL C_L = 50pF
2
-
60
75
4.5
-
12
15
90
ns
18
ns
6
-
10
13
15
ns
Input Capacitance
Three-State Output
Capacitance
C_I
-
-
-
10
10
C_O
-
-
-
20
20
10
pF
20
pF
Power Dissipation
Capacitance
(Notes 3, 4)
C_PD
-
5
45
-
-
-
pF
HCT TYPES
Propagation Delay
In to Y
t_PLH, t_PHL C_L = 50pF
4.5
-
33
41
C_L = 15pF
5
13
-
-
Propagation Delay
S to Y
t_PZL, t_PZH C_L = 50pF
4.5
-
38
48
C_L = 15pF
5
12
-
-
Propagation Delay
OE to Y
t_PLZ, t_PHZ C_L = 50pF
4.5
-
30
38
C_L = 15pF
5
16
-
-
Output Transition Times
t_TLH, t_THL C_L = 50pF
4.5
-
12
15
Input Capacitance
C_I
-
-
-
10
10
Three-State Output
Capacitance
C_O
-
-
-
20
20
50
ns
-
ns
57
ns
-
ns
45
ns
-
ns
18
ns
10
pF
20
pF
Power Dissipation
Capacitance
(Notes 3, 4)
C_PD
-
5
45
-
-
-
pF
NOTES:
3. C_PD is used to determine the dynamic power consumption, per multiplexer.
4. P_D = V_CC2 f_i (C_PD + C_L) where f_i = Input Frequency, C_L = Output Load Capacitance, V_CC = Supply Voltage.
5