KK74HC257A Datasheet, PDF (4/6 Pages) KODENSHI KOREA CORP. – Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS

KK74HC257A
AC ELECTRICAL CHARACTERISTICS (C_L=50pF,Input t_r=t_f=6.0 ns)
Symbol
Parameter
t_PLH, t_PHL Maximum Propagation Delay, Nibble A or B to
Output Y (Figures 1and 4)
t_PLH, t_PHL Maximum Propagation Delay , Select to
Output Y (Figures 2 and 4)
t_PLZ, t_PHZ Maximum Propagation Delay , Output Enable to
Output Y (Figures 3 and 5)
t_PZL, t_PZH Maximum Propagation Delay , Output Enable to
Output Y (Figures 3 and 5)
t_TLH, t_THL Maximum Output Transition Time, Any Output
(Figures 1 and 4)
C_IN
C_OUT
Maximum Input Capacitance
Maximum Three-State Output Capacitance
(Output in High-Impedance State)
V_CC
Guaranteed Limit
V 25 °C ≤85°C ≤125°C Unit
to
-55°C
2.0 100
125
150
ns
4.5 20
25
30
6.0 17
21
26
2.0 100
125
150
ns
4.5 20
25
30
6.0 17
21
26
2.0 150
190
225
ns
4.5 30
38
45
6.0 26
33
38
2.0 150
190
225
ns
4.5 30
38
45
6.0 26
33
38
2.0 60
75
90
ns
4.5 12
15
18
6.0 10
13
15
-
10
10
10
pF
-
15
15
15
pF
Power Dissipation Capacitance (Per Package)
C_PD Used to determine the no-load dynamic power
consumption:
P_D=C_PDV_CC2f+I_CCV_CC
Typical @25°C,V_CC=5.0 V
39
pF
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
4