74HCT4351 [NXP]
8-channel analog multiplexer/demultiplexer with latch; 8通道模拟多路复用器/多路分解器与锁存
| 型号： | 74HCT4351 |
| 厂家： | 
NXP |
| 描述： | 8-channel analog multiplexer/demultiplexer with latch |
| 文件： | 总17页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT4351
8-channel analog
multiplexer/demultiplexer with latch
December 1990
Product specification
File under Integrated Circuits, IC06
Philips Semiconductors
Product specification
8-channel analog
multiplexer/demultiplexer with latch
74HC/HCT4351
The 74HC/HCT4351 are 8-channel analog
FEATURES
multiplexers/demultiplexers with three select inputs (S0 to
S2), two enable inputs (E1 and E2), a latch enable input
(LE), eight independent inputs/outputs (Y0 to Y7) and a
common input/output (Z).
• Wide analog input voltage range:
± 5 V
• Low “ON” resistance:
80 Ω (typ.) at VCC − VEE = 4.5 V
70 Ω (typ.) at VCC − VEE = 6.0 V
60 Ω (typ.) at VCC − VEE = 9.0 V
With E1 LOW and E2 is HIGH, one of the eight switches is
selected (low impedance ON-state) by S0 to S2. The data
at the select inputs may be latched by using the active
LOW latch enable input (LE). When LE is HIGH the latch
is transparent. When either of the two enable inputs,
E1 (active LOW) and E2 (active HIGH), is inactive, all 8
analog switches are turned off.
• Logic level translation: to enable 5 V logic to
communicate with ± 5 V analog signals
• Typical “break before make” built in
• Address latches provided
• Output capability: non-standard
• ICC category: MSI
VCC and GND are the supply voltage pins for the digital
control inputs (S0 to S2, LE, E1 and E2). The VCC 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 (Y0 to Y7, and Z) can swing
between VCC as a positive limit and VEE as a negative
limit.
GENERAL DESCRIPTION
The 74HC/HCT4351 are high-speed Si-gate CMOS
devices. They are specified in compliance with JEDEC
standard no. 7A.
V
CC − VEE may not exceed 10.0 V.
For operation as a digital multiplexer/demultiplexer, VEE is
connected to GND (typically ground).
QUICK REFERENCE DATA
VEE = GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
TYPICAL
SYMBOL
PARAMETER
CONDITIONS
UNIT
HC
27
HCT
35
tPZH / tPZL
turn “ON” time E1, E2 or Sn to Vos
turn “OFF” time E1, E2 or Sn to Vos
input capacitance
CL = 15 pF; RL = 1 kΩ; VCC = 5 V
ns
ns
pF
pF
t
PHZ / tPLZ
21
23
CI
3.5
25
3.5
25
CPD
CS
power dissipation capacitance per switch notes 1 and 2
max. switch capacitance
independent (Y)
common (Z)
5
5
pF
pF
25
25
Notes
2. For HC the condition is VI = GND to VCC
1. CPD is used to determine the dynamic power
For HCT the condition is VI = GND to VCC − 1.5 V
dissipation (PD in µW):
PD = CPD × VCC2 × fi +∑ {(CL+ CS) × VCC2 × fo}
where:
ORDERING INFORMATION
fi = input frequency in MHz
See “74HC/HCT/HCU/HCMOS Logic Package
Information”.
fo = output frequency in MHz
CL = output load capacitance in pF
CS = max. switch capacitance in pF
∑ {(CL+ CS) × VCC2 × fo} = sum of outputs
VCC = supply voltage in V
December 1990
2
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
PIN DESCRIPTION
PIN NO.
SYMBOL
Z
NAME AND FUNCTION
common
4
3, 14
n.c.
not connected
7
E1
enable input (active LOW)
enable input (active HIGH)
negative supply voltage
ground (0 V)
8
E2
9
VEE
10
GND
LE
11
latch enable input (active LOW)
select inputs
15, 13, 12
S0 to S2
Y0 to Y7
VCC
17, 18, 19, 16, 1, 6, 2, 5
20
independent inputs/outputs
positive supply voltage
Fig.1 Pin configuration.
Fig.2
Fig.3 IEC logic symbol.
December 1990
3
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
FUNCTION TABLE
INPUTS
CHANNEL
ON
E1
E2
LE
S2
S1
S0
H
X
X
L
X
X
X
X
X
X
X
X
none
none
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
L
H
L
Y0
Y1
Y2
Y3
H
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
L
H
L
Y4
Y5
Y6
Y7
(1)
H
L
X
H
X
L
↓
X
X
X
X
X
X
(2)
Notes
1. Last selected channel “ON”.
2. Selected channels latched.
3. H = HIGH voltage level
L = LOW voltage level
X = don’t care
↓ = HIGH-to-LOW LE transition
APPLICATIONS
• Analog multiplexing and demultiplexing
• Digital multiplexing and demultiplexing
• Signal gating
Fig.4 Functional diagram.
Fig.5 Schematic diagram (one switch).
December 1990
4
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Voltages are referenced to VEE = GND (ground = 0 V)
SYMBOL
PARAMETER
MIN. MAX. UNIT CONDITIONS
VCC
±IIK
±ISK
±IS
DC supply voltage
DC digital input diode current
DC switch diode current
DC switch current
−0.5 +11.0
V
20
20
25
20
50
mA
mA
mA
mA
mA
for VI < −0.5 V or VI > VCC + 0.5 V
for VS < −0.5 V or VS > VCC + 0.5 V
for −0.5 V < VS < VCC + 0.5 V
±IEE
DC VEE current
±ICC; ±IGND DC VCC or GND current
Tstg
Ptot
storage temperature range
−65 +150 °C
power dissipation per package
for temperature range: −40 to +125 °C
74HC/HCT
plastic DIL
750
500
100
mW
above +70 °C: derate linearly with 12 mW/K
above +70 °C: derate linearly with 8 mW/K
plastic mini-pack (SO)
power dissipation per switch
mW
mW
PS
Note to ratings
1. To avoid drawing VCC current out of terminal Z, when switch current flows in terminals Yn, the voltage drop across
the bidirectional switch must not exceed 0.4 V. If the switch current flows into terminal Z, no VCC current will flow out
of terminals Yn. In this case there is no limit for the voltage drop across the switch, but the voltages at Yn and Z may
not exceed VCC or VEE
.
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER
74HC
74HCT
UNIT CONDITIONS
min. typ. max. min. typ. max.
VCC
VCC
VI
DC supply voltage VCC−GND
DC supply voltage VCC−VEE
DC input voltage range
2.0
5.0 10.0 4.5
5.0 10.0 2.0
VCC GND
VCC VEE
+85 −40
+125 −40
1000
5.0 5.5
5.0 10.0
VCC
V
V
V
V
see Figs 6 and 7
see Figs 6 and 7
2.0
GND
VEE
VS
DC switch voltage range
VCC
Tamb
Tamb
tr, tf
operating ambient temperature range −40
operating ambient temperature range −40
input rise and fall times
+85 °C
+125 °C
see DC and AC
CHARACTERISTICS
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
VCC = 10.0 V
500
400
6.0
6.0 500
ns
250
December 1990
5
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
MBA334
10
handbook, halfpage
V
- GND
CC
(V)
8
6
4
operating area
2
0
0
2
4
6
8
10
V
- V (V)
CC EE
Fig.6 Guaranteed operating area as a function
of the supply voltages for 74HC4351.
Fig.7 Guaranteed operating area as a function of
the supply voltages for 74HCT4351.
DC CHARACTERISTICS FOR 74HC/HCT
For 74HC: VCC − GND or VCC − VEE = 2.0, 4.5, 6.0 and 9.0 V
For 74HCT: VCC − GND = 4.5 and 5.5 V; VCC − VEE = 2.0, 4.5, 6.0 and 9.0 V
Tamb (°C)
TEST CONDITIONS
74HC/HCT
SYMBOL
RON
PARAMETER
UNIT
−40 to
+125
VCC VEE
(V) (V)
IS
(µA)
+25
−40 to +85
Vis
VI
min. typ. max. min. max. min. max.
ON resistance
(rail)
−
−
−
−
Ω
Ω
Ω
Ω
2.0
0
0
0
100
VCC VIN
or
1000 VEE VIL
100 180
90
70
225
200
165
270
240
195
4.5
6.0
4.5
1000 to
160
130
−4.5 1000
RON
ON resistance
(rail)
150
80
70
−
−
−
Ω
Ω
Ω
Ω
2.0
4.5
6.0
4.5
0
0
0
100
1000
1000
VEE VIH
140
120
105
175
150
130
210
180
160
or
VIL
60
−4.5 1000
RON
ON resistance
(rail)
150
90
80
−
−
−
Ω
Ω
Ω
Ω
2.0
4.5
6.0
4.5
0
0
0
100
1000
1000
VCC VIH
160
140
120
200
175
150
240
210
180
or
VIL
65
−4.5 1000
∆RON
maximum ∆ ON
resistance
between any two
channels
−
9
8
6
Ω
Ω
Ω
Ω
2.0
4.5
6.0
4.5
0
0
0
−4.5
VCC VIH
to
or
VEE VIL
Notes to DC characteristics
1. At supply voltages (VCC − VEE) approaching 2.0 V, the analog switch ON-resistance becomes extremely non-linear.
There it is recommended that these devices be used to transmit digital signals only, when using these supply
voltages.
2. For test circuit measuring RON see Fig.8.
December 1990
6
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
DC CHARACTERISTICS FOR 74HC
Voltages are referenced to GND (ground = 0 V)
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL
PARAMETER
UNIT
VCC VEE
+25
−40 to +85 −40 to +125
VI
OTHER
(V)
(V)
min. typ. max. min. max. min. max.
VIH
HIGH level input
voltage
1.5 1.2
3.15 2.4
4.2 3.2
6.3 4.7
1.5
3.15
4.2
6.3
1.5
3.15
4.2
6.3
V
2.0
4.5
6.0
9.0
VIL
LOW level input
voltage
0.8 0.5
0.5
1.35
1.8
2.7
0.5
1.35
1.8
2.7
V
2.0
4.5
6.0
9.0
2.1 1.35
2.8 1.8
4.3 2.7
±II
input leakage
current
0.1
0.2
1.0
2.0
1.0
2.0
µA
µA
µA
µA
6.0
10.0 0
0
VCC
or
GND
±IS
±IS
±IS
ICC
analog switch
OFF-state current
per channel
0.1
0.4
0.4
1.0
4.0
4.0
1.0
4.0
4.0
10.0 0
VIH
or
VIL
VS
=
V
CC − VEE
(see Fig.10)
VS
CC − VEE
(see Fig.10)
VS
CC − VEE
(see Fig.11)
analog switch
OFF-state current
all channels
10.0 0
10.0 0
VIH
or
VIL
=
V
analog switch
ON-state current
VIH
or
VIL
=
V
quiescent supply
current
8.0
16.0
80.0
160.0
160.0 µA
320.0
6.0
10.0 0
0
VCC Vis = VEE
or or VCC
;
GND Vos = VCC
or VEE
December 1990
7
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL
PARAMETER
UNIT
VCC VEE
OTHER
+25
−40 to +85 −40 to +125
(V) (V)
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
Vis to Vos
14
5
4
60
12
10
8
75
15
13
10
90
18
15
12
ns
2.0
4.5
6.0
0
0
0
RL = ∞;
CL = 50 pF
(see Fig.17)
4
4.5 −4.5
t
t
t
PZH/ tPZL turn “ON” time
E1 to Vos
85
31
25
28
300
60
51
375
75
64
450
90
77
ns
ns
ns
ns
ns
ns
ns
ns
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
55
69
83
4.5 −4.5
PZH/ tPZL turn “ON” time
E2 to Vos
85
31
25
25
300
60
51
375
75
64
450
90
77
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
55
69
83
4.5 −4.5
PZH/ tPZL turn “ON” time
LE to Vos
91
33
26
27
300
60
51
375
75
64
450
90
77
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
55
69
83
4.5 −4.5
tPZH/ tPZL turn “ON” time
Sn to Vos
88
32
26
25
300
60
51
375
75
64
450
90
77
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
50
63
75
4.5 −4.5
tPHZ/ tPLZ turn “OFF” time
E1 to Vos
69
25
20
20
250
50
43
315
63
54
375
75
64
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
40
50
60
4.5 −4.5
t
t
t
PHZ/ tPLZ turn “OFF” time
E2 to Vos
72
26
21
19
250
50
43
315
63
54
375
75
64
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
40
50
60
4.5 −4.5
PHZ/ tPLZ turn “OFF” time
LE to Vos
83
30
24
26
275
55
47
345
69
59
415
83
71
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
45
56
68
4.5 −4.5
PHZ/ tPLZ turn “OFF” time
Sn to Vos
80
29
23
24
275
55
47
345
69
59
415
83
71
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.18)
48
60
72
4.5 −4.5
December 1990
8
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL
PARAMETER
UNIT
VCC VEE
OTHER
+25
−40 to +85 −40 to +125
(V) (V)
min. typ. max. min. max. min. max.
tsu
set-up time
Sn to LE
60
12
10
18
17
6
5
75
15
13
23
90
18
15
27
ns
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.19)
9
4.5 −4.5
th
hold time
Sn to LE
5
5
5
5
−8
−3
−2
−4
5
5
5
5
5
5
5
5
ns
ns
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.19)
4.5 −4.5
tW
LE minimum pulse
width
HIGH
100 11
125
25
21
150
30
26
2.0
4.5
6.0
0
0
0
RL = 1 kΩ;
CL = 50 pF
(see Fig.19)
20
17
25
1
3
7
31
38
4.5 −4.5
December 1990
9
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
DC CHARACTERISTICS FOR 74HCT
Voltages are referenced to GND (ground = 0)
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL PARAMETER
UNIT
VCC VEE
(V) (V)
+25
−40 to +85 −40 to +125
VI
OTHER
min. typ. max. min. max. min. max.
VIH
VIL
±II
HIGH level input
voltage
2.0
1.6
2.0
2.0
V
4.5
to
5.5
LOW level input
voltage
1.2 0.8
0.1
0.8
1.0
1.0
0.8
1.0
1.0
V
4.5
to
5.5
input leakage
current
µA
µA
5.5
0
0
VCC
or
GND
±IS
analog switch
OFF-state current
per channel
0.1
10.0
VIH
or
VIL
VS
=
VCC − VEE
(see
Fig.10)
±IS
analog switch
OFF-state current
all channels
0.4
0.4
4.0
4.0
4.0
4.0
µA
µA
10.0
0
VIH
or
VIL
VS
=
VCC − VEE
(see
Fig.10)
±IS
analog switch
ON-state current
10.0 0
VIH
or
VS
VCC − VEE
=
VIL
(see
Fig.11)
ICC
quiescent supply
current
8.0
16.0
80.0
160.0
160.0 µA
320.0
5.5
0
VCC
Vis = VEE
5.0 −5.0 or
GND
or VCC
;
Vos = VCC
or VEE
∆ICC
additional
100 360
450
490
µA
4.5
to
5.5
0
VCC
−2.1 V inputs
other
quiescent supply
current per input
pin for unit load
coefficient is 1
(note 1)
at VCC or
GND
Note to HCT types
1. The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given here.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
E1, E2
Sn
LE
0.50
0.50
1.5
December 1990
10
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL
PARAMETER
UNIT
VCC VEE
OTHER
+25
−40 to +85 −40 to +125
(V) (V)
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
Vis to Vos
6
4
12
8
15
10
18
12
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4.5
0
RL = ∞;
4.5 −4.5 CL = 50 pF
(see Fig.17)
tPZH/ tPZL turn “ON” time
E1 to Vos
40
31
75
60
94
75
113
90
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
t
t
t
t
t
PZH/ tPZL turn “ON” time
E2 to Vos
35
26
70
50
88
63
105
75
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
PZH/ tPZL turn “ON” time
LE to Vos
42
37
75
60
94
75
113
90
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
PZH/ tPZL turn “ON” time
Sn to Vos
39
30
75
60
94
75
113
90
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
PHZ/ tPLZ turn “OFF” time
E1 to Vos
27
20
55
40
69
50
83
60
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
PHZ/ tPLZ turn “OFF” time
E2 to Vos
32
26
60
50
75
63
90
75
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
tPHZ/ tPLZ turn “OFF” time
LE to Vos
33
30
60
55
75
69
90
83
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
tPHZ/ tPLZ turn “OFF” time
Sn to Vos
33
29
65
55
81
69
98
83
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.18)
tsu
set-up time
Sn to LE
12
14
6
7
15
18
18
21
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.19)
th
hold time
Sn to LE
5
5
−1
−2
5
5
5
5
4.5
0
RL = 1 kΩ;
4.5 −4.5 CL = 50 pF
(see Fig.19)
tW
LE minimum
25
25
13
13
31
31
38
38
4.5
0
RL = 1 kΩ;
pulse width HIGH
4.5 −4.5 CL = 50 pF
(see Fig.19)
December 1990
11
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
Fig.8 Test circuit for measuring RON
.
Fig.9 Typical RON as a function of input voltage
Vis for Vis = 0 to VCC − VEE
.
Fig.10 Test circuit for measuring OFF-state current.
Fig.11 Test circuit for measuring ON-state current.
12
December 1990
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
ADDITIONAL AC CHARACTERISTICS FOR 74HC/HCT
Recommended conditions and typical values
GND = 0 V; Tamb = 25 °C
VCC
(V)
VEE
(V)
Vis(p−p)
(V)
SYMBOL
PARAMETER
typ. UNIT
CONDITIONS
sine-wave distortion
f = 1 kHz
0.04
0.02
%
%
2.25
4.5
−2.25
−4.5
4.0
8.0
RL = 10 kΩ; CL = 50 pF
(see Fig.14)
sine-wave distortion
f = 10 kHz
0.12
0.06
%
%
2.25
4.5
−2.25
−4.5
4.0
8.0
RL = 10 kΩ; CL = 50 pF
(see Fig.14)
switch “OFF” signal
feed-through
−50
−50
dB
dB
2.25
4.5
−2.25
−4.5
note 1
RL = 600 Ω; CL = 50 pF
(see Figs 12 and 15)
V(p−p)
crosstalk voltage between
control and any switch
(peak-to-peak value)
120
220
mV
mV
4.5
4.5
0
−4.5
RL = 600 Ω; CL = 50 pF;
f = 1 MHz (E1, E2 or Sn,
square-wave between VCC
and GND, tr = tf = 6 ns)
(see Fig.16)
fmax
CS
minimum frequency response
(−3dB)
160
170
MHz
MHz
2.25
4.5
−2.25
−4.5
note 2
RL = 50 Ω; CL = 10 pF
(see Figs 13 and 14)
maximum switch capacitance
independent (Y)
5
25
pF
pF
common
(Z)
Notes to AC characteristics
1. Adjust input voltage Vis to 0 dBm level (0 dBm = 1 mW into 600 Ω).
2. Adjust input voltage Vis to 0 dBm level at Vos for 1 MHz (0 dBm = 1 mW into 50 Ω).
Vis is the input voltage at a Yn or Z terminal, whichever is assigned as an input.
Vos is the output voltage at a Yn or Z terminal, whichever is assigned as an output.
Test conditions:
VCC = 4.5 V; GND = 0 V; VEE = −4.5 V;
RL = 50 Ω; Rsource = 1 kΩ.
Fig.12 Typical switch “OFF” signal feed-through as a function of frequency.
December 1990
13
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
Test conditions:
VCC = 4.5 V; GND = 0 V; VEE = −4.5 V;
RL = 50 Ω; Rsource = 1 kΩ.
Fig.13 Typical frequency response.
Fig.14 Test circuit for measuring sine-wave
distortion and minimum frequency response.
Fig.15 Test circuit for measuring switch “OFF”
signal feed-through.
The crosstalk is defined as follows
(oscilloscope output):
Fig.16 Test circuit for measuring crosstalk between control and any switch.
December 1990
14
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
AC WAVEFORMS
HC : VM = 50%; VI = GND to VCC
.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.18 Waveforms showing the turn-ON and
turn-OFF times.
Fig.17 Waveforms showing the input (Vis) to output
(Vos) propagation delays.
HC : VM = 50%; VI = GND to VCC
.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.19 Waveforms showing the set-up and hold
times from Sn inputs to LE input, and
minimum pulse width of LE.
December 1990
15
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
TEST CIRCUIT AND WAVEFORMS
Conditions
TEST
SWITCH
VEE
Vis
tr; tf
tPZH
tPZL
tPHZ
tPLZ
VCC
VEE
VCC
VEE
FAMILY AMPLITUDE VM
VCC
VEE
VCC
fmax
PULSE WIDTH
;
OTHER
74HC
VCC
< 2 ns
6 ns
6 ns
50%
others open
pulse
74HCT 3.0 V
1.3 V < 2 ns
CL
RT
tr
=
=
=
load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values).
termination resistance should be equal to the output impedance ZO of the pulse generator.
tf = 6 ns; when measuring fmax, there is no constraint on tr, tf with 50% duty factor.
Fig.20 Test circuit for measuring AC performance.
Conditions
TEST
SWITCH
Vis
tPZH
tPZL
tPHZ
tPLZ
VEE
VCC
VCC
VEE
VCC
VEE
tr; tf
FAMILY AMPLITUDE VM
fmax
;
OTHER
VEE
VCC
PULSE WIDTH
74HC
VCC
< 2 ns
6 ns
6 ns
50%
others open
pulse
74HCT 3.0 V
1.3 V < 2 ns
CL
RT
tr
=
=
=
load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values).
termination resistance should be equal to the output impedance ZO of the pulse generator.
tf = 6 ns; when measuring fmax, there is no constraint on tr, tf with 50% duty factor.
Fig.21 Input pulse definitions.
December 1990
16
Philips Semiconductors
Product specification
8-channel analog multiplexer/demultiplexer
with latch
74HC/HCT4351
PACKAGE OUTLINES
See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
December 1990
17
相关型号：
74HCT4352D
IC 4-CHANNEL, DIFFERENTIAL MULTIPLEXER, PDSO20, PLASTIC, SO-20, Multiplexer or Switch
NXP
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