參數(shù)資料
型號(hào)： 74HC4051
廠商： Texas Instruments, Inc.
英文描述： High Speed CMOS Logic Analog Multiplexers/Demultiplexers
中文描述： 高速CMOS邏輯模擬多路復(fù)用器/解復(fù)用器
文件頁(yè)數(shù)： 2/16頁(yè)
文件大?。?/td> 126K
代理商： 74HC4051
December 1990
2
Philips Semiconductors
Product specification
8-channel analog
multiplexer/demultiplexer
74HC/HCT4051
FEATURES
Wide analog input voltage range:
±
5 V.
Low “ON” resistance:
80
(typ.) at V
CC
V
EE
= 4.5 V
70
(typ.) at V
CC
V
EE
= 6.0 V
60
(typ.) at V
CC
V
EE
= 9.0 V
Logic level translation:
to enable 5 V logic to communicate with
±
5 V analog
signals
Typical “break before make” built in
Output capability: non-standard
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT4051 are high-speed Si-gate CMOS
devices and are pin compatible with the “4051” of the
“4000B” series. They are specified in compliance with
JEDEC standard no. 7A.
The 74HC/HCT4051 are 8-channel analog
multiplexers/demultiplexers with three digital select inputs
(S
0
to S
2
), an active LOW enable input (E), eight
independent inputs/outputs (Y
0
to Y
7
) and a common
input/output (Z).
With E LOW, one of the eight switches is selected (low
impedance ON-state) by S
0
to S
2
. With E HIGH, all
switches are in the high impedance OFF-state,
independent of S
0
to S
2
.
V
CC
and GND are the supply voltage pins for the digital
control inputs (S
0
to S
2
, and E). The V
CC
to GND ranges
are 2.0 to 10.0 V for HC and 4.5 to 5.5 V for HCT. The
analog inputs/outputs (Y
0
to Y
7
, and Z) can swing between
V
CC
as a positive limit and V
EE
as a negative limit.
V
CC
V
EE
may not exceed 10.0 V.
For operation as a digital multiplexer/demultiplexer, V
EE
is
connected to GND (typically ground).
QUICK REFERENCE DATA
V
EE
= GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W):
P
D
= C
PD
×
V
CC2
×
f
i
+
∑ {
(C
L
+ C
S
) ×
V
CC2
×
f
o
} where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
∑
{ (C
L
+ C
S
) ×
V
CC2
×
f
o
} = sum of outputs
C
L
= output load capacitance in pF
C
S
= max. switch capacitance in pF
V
CC
= supply voltage in V
For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
1.5 V
2.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PZH
/ t
PZL
turn “ON” time
E to V
os
S
n
to V
os
turn “OFF” time
E to V
os
S
n
to V
os
input capacitance
power dissipation capacitance per switch
max. switch capacitance
independent (Y)
common
(Z)
C
L
= 15 pF; R
L
= 1 k
;
V
CC
= 5 V
22
20
22
24
ns
ns
t
PHZ
/ t
PLZ
18
19
3.5
25
16
20
3.5
25
ns
ns
pF
pF
C
I
C
PD
C
S
notes 1 and 2
5
25
5
25
pF
pF
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