Datasheet

74HC_HCT4051 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 7 — 19 July 2012 18 of 31
NXP Semiconductors
74HC4051; 74HCT4051
8-channel analog multiplexer/demultiplexer
[1] t
pd
is the same as t
PHL
and t
PLH
.
[2] t
on
is the same as t
PZH and
t
PZL
.
[3] t
off
is the same as t
PHZ
and t
PLZ
.
[4] C
PD
is used to determine the dynamic power dissipation (P
D
in W).
P
D
= C
PD
 V
CC
2
 f
i
 N + {(C
L
+C
sw
)  V
CC
2
 f
o
} where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
N = number of inputs switching;
{(C
L
+C
sw
)  V
CC
2
 f
o
} = sum of outputs;
C
L
= output load capacitance in pF;
C
sw
= switch capacitance in pF;
V
CC
= supply voltage in V.
t
off
turn-off time E to V
os
; R
L
=1 k; see Figure 14
[3]
V
CC
= 4.5 V; V
EE
=0 V --68ns
V
CC
= 4.5 V; V
EE
= 4.5 V - - 48 ns
Sn to V
os
; R
L
=1 k; see Figure 14
[3]
V
CC
= 4.5 V; V
EE
=0 V --68ns
V
CC
= 4.5 V; V
EE
= 4.5 V - - 48 ns
Table 10. Dynamic characteristics for 74HCT4051
…continued
GND = 0 V; t
r
=t
f
=6ns; C
L
= 50 pF; for test circuit see Figure 15.
V
is
is the input voltage at a Yn or Z terminal, whichever is assigned as an input.
V
os
is the output voltage at a Yn or Z terminal, whichever is assigned as an output.
Symbol Parameter Conditions Min Typ Max Unit
Fig 13. Input (V
is
) to output (V
os
) propagation delays
001aad555
t
PLH
t
PHL
50 %
50 %
V
is
input
V
os
output