Datasheet 74HCT4351U, 74HCT4351N, 74HCT4351DB, 74HCT4351D, 74HC4351N Datasheet (Philips)

DATA SH EET

Product specification
File under Integrated Circuits, IC06

December 1990

INTEGRATED CIRCUITS

74HC/HCT4351

8-channel analog
multiplexer/demultiplexer with latch

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

December 1990 2

Philips Semiconductors Product specification

8-channel analog
multiplexer/demultiplexer with latch

74HC/HCT4351

FEATURES

• 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

• 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

GENERAL DESCRIPTION

The 74HC/HCT4351 are high-speed Si-gate CMOS
devices. They are specified in compliance with JEDEC
standard no. 7A.

The 74HC/HCT4351 are 8-channel analog
multiplexers/demultiplexers with three select inputs (S

0

to
S2), two enable inputs (E1and E2), a latch enable input
(LE), eight independent inputs/outputs (Y0to Y7) and a
common input/output (Z).

With E1LOW and E2is HIGH, one of the eight switches is
selected (low impedance ON-state) by S0to 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.

VCCand GND are the supply voltage pins for the digital
control inputs (S0to S2, LE, E1and E2). The VCCto GND
ranges are 2.0 to 10.0 V for HC and 4.5 to 5.5 V for HCT.
The analog inputs/outputs (Y0to Y7, and Z) can swing
between VCCas a positive limit and VEEas a negative
limit.

VCC− VEEmay not exceed 10.0 V.
For operation as a digital multiplexer/demultiplexer, VEEis

connected to GND (typically ground).

QUICK REFERENCE DATA

VEE= GND = 0 V; T

amb

=25°C; tr=tf= 6 ns

SYMBOL PARAMETER CONDITIONS

TYPICAL

UNIT

HC HCT

t

PZH

/ t

PZL

turn “ON” time E1, E2or Snto V

os

CL= 15 pF; RL=1 kΩ; VCC=5 V2735ns

t

PHZ

/ t

PLZ

turn “OFF” time E1, E2or Snto V

os

21 23 ns

C

I

input capacitance 3.5 3.5 pF

C

PD

power dissipation capacitance per switch notes 1 and 2 25 25 pF

C

S

max. switch capacitance

independent (Y) 5 5 pF
common (Z) 25 25 pF

Notes

1. CPD is used to determine the dynamic power
dissipation (PD in µW):

PD=CPD× V

CC

2

× fi+∑ {(CL+ C

S

)

× V

CC

2

× fo}

where:
fi= input frequency in MHz
fo= output frequency in MHz
CL= output load capacitance in pF
CS= max. switch capacitance in pF
∑ {(CL+ C

S

)

× V

CC

2

× fo} = sum of outputs

VCC= supply voltage in V

2. For HC the condition is VI= GND to V

CC

For HCT the condition is VI= GND to VCC− 1.5 V

ORDERING INFORMATION

See

“74HC/HCT/HCU/HCMOS Logic Package

Information”

.

December 1990 3

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

PIN DESCRIPTION

PIN NO. SYMBOL NAME AND FUNCTION

4 Z common
3, 14 n.c. not connected
7

E

1

enable input (active LOW)

8E

2

enable input (active HIGH)

9V

EE

negative supply voltage
10 GND ground (0 V)
11

LE latch enable input (active LOW)

15, 13, 12 S

0

to S

2

select inputs
17, 18, 19, 16, 1, 6, 2, 5 Y

0

to Y

7

independent inputs/outputs
20 V

CC

positive supply voltage

Fig.1 Pin configuration. Fig.2 Fig.3 IEC logic symbol.

December 1990 4

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

FUNCTION TABLE

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

INPUTS

CHANNEL

ON

E

1

E

2

LE S

2

S

1

S

0

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
H

Y

0

Y

1

Y

2

Y

3

L
L
L
L

H
H
H
H

H
H
H
H

H
H
H
H

L
L
H
H

L
H
L
H

Y

4

Y

5

Y

6

Y

7

L
X

H
X

L

↓

X
X

X
X

X
X

(1)
(2)

Fig.4 Functional diagram.

Fig.5 Schematic diagram (one switch).

December 1990 5

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)

Note to ratings

1. To avoid drawing V

CC

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 VCCcurrent 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 VCCor VEE.

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER MIN. MAX. UNIT CONDITIONS

V

CC

DC supply voltage −0.5 +11.0 V

±I

IK

DC digital input diode current 20 mA for VI<−0.5 V or VI> VCC+ 0.5 V

±I

SK

DC switch diode current 20 mA for VS<−0.5 V or VS> VCC+ 0.5 V

±I

S

DC switch current 25 mA for −0.5 V < VS< VCC+ 0.5 V

±I

EE

DC VEE current 20 mA

±I

CC;±IGND

DC VCCor GND current 50 mA

T

stg

storage temperature range −65 +150 °C

P

tot

power dissipation per package for temperature range: −40 to +125 °C

74HC/HCT
plastic DIL 750 mW above +70 °C: derate linearly with 12 mW/K
plastic mini-pack (SO) 500 mW above +70 °C: derate linearly with 8 mW/K

P

S

power dissipation per switch 100 mW

SYMBOL PARAMETER

74HC 74HCT

UNIT CONDITIONS

min. typ. max. min. typ. max.

V

CC

DC supply voltage VCC−GND 2.0 5.0 10.0 4.5 5.0 5.5 V see Figs 6 and 7

V

CC

DC supply voltage VCC−V

EE

2.0 5.0 10.0 2.0 5.0 10.0 V see Figs 6 and 7

V

I

DC input voltage range GND V

CC

GND V

CC

V

V

S

DC switch voltage range V

EE

V

CCVEE

V

CC

V

T

amb

operating ambient temperature range −40 +85 −40 +85 °C see DC and AC

CHARACTERISTICS

T

amb

operating ambient temperature range −40 +125 −40 +125 °C

t

r

, t

f

input rise and fall times

6.0

1000
500
400
250

6.0 500 ns

VCC= 2.0 V
VCC= 4.5 V
VCC= 6.0 V
VCC= 10.0 V

December 1990 6

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

Fig.6 Guaranteed operating area as a function

of the supply voltages for 74HC4351.

handbook, halfpage

10

8

6

4

2

0

0246810

VCC- VEE(V)

VCC- GND

(V)

MBA334

operating area

Fig.7 Guaranteed operating area as a function of

the supply voltages for 74HCT4351.

DC CHARACTERISTICS FOR 74HC/HCT

For 74HC: V

CC

− GND or VCC− VEE= 2.0, 4.5, 6.0 and 9.0 V

For 74HCT: V

CC

− GND = 4.5 and 5.5 V; VCC− VEE= 2.0, 4.5, 6.0 and 9.0 V

Notes to DC characteristics

1. At supply voltages (V

CC

− 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 RONsee Fig.8.

SYMBOL PARAMETER

T

amb

(°C)

UNIT

TEST CONDITIONS

74HC/HCT

V

CC

(V)

V

EE

(V)

I

S

(µA)

V

is

V

I

+25 −40 to +85

−40 to

+125

min. typ. max. min. max. min. max.

R

ON

ON resistance
(rail)

−

100
90
70

−

180
160
130

−

225
200
165

−

270
240
195

Ω
Ω
Ω
Ω

2.0

4.5

6.0

4.5

0
0
0

−4.5

100
1000
1000
1000

V

CC

to
V

EE

V

IN

or
V

IL

R

ON

ON resistance
(rail)

150
80
70
60

−

140
120
105

−

175
150
130

−

210
180
160

Ω
Ω
Ω
Ω

2.0

4.5

6.0

4.5

0
0
0

−4.5

100
1000
1000
1000

V

EEVIH

or
V

IL

R

ON

ON resistance
(rail)

150
90
80
65

−

160
140
120

−

200
175
150

−

240
210
180

Ω
Ω
Ω
Ω

2.0

4.5

6.0

4.5

0
0
0

−4.5

100
1000
1000
1000

V

CCVIH

or
V

IL

∆R

ON

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

V

CC

to
V

EE

V

IH

or
V

IL

December 1990 7

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)

SYMBOL PARAMETER

T

amb

(°C)

UNIT

TEST CONDITIONS

74HC

V

CC

(V)

V

EE

(V)

V

I

OTHER+25 −40 to +85 −40 to +125

min. typ. max. min. max. min. max.

V

IH

HIGH level input
voltage

1.5

3.15

4.2

6.3

1.2

2.4

3.2

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

V

IL

LOW level input
voltage

0.8

2.1

2.8

4.3

0.5

1.35

1.8

2.7

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

±I

I

input leakage
current

0.1

0.2

1.0

2.0

1.0

2.0

µA 6.0

10.0

0
0

V

CC

or
GND

±I

S

analog switch
OFF-state current
per channel

0.1 1.0 1.0 µA 10.0 0V

IH

or
V

IL

VS =
V

CC

− V

EE

(see Fig.10)

±I

S

analog switch
OFF-state current
all channels

0.4 4.0 4.0 µA 10.0 0V

IH

or
V

IL

VS =
V

CC

− V

EE

(see Fig.10)

±I

S

analog switch
ON-state current

0.4 4.0 4.0 µA 10.0 0V

IH

or
V

IL

VS =
V

CC

− V

EE

(see Fig.11)

I

CC

quiescent supply
current

8.0

16.0

80.0

160.0

160.0

320.0

µA 6.0

10.0

0
0

V

CC

or
GND

V

is=VEE

or VCC;
V

os=VCC

or V

EE

December 1990 8

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

AC CHARACTERISTICS FOR 74HC

GND = 0 V; t

r=tf

= 6 ns; CL= 50 pF

SYMBOL PARAMETER

T

amb

(°C)

UNIT

TEST CONDITIONS

74HC

V

CC

(V)

V

EE

(V)

OTHER+25 −40 to +85 −40 to +125

min. typ. max. min. max. min. max.

t

PHL

/ t

PLH

propagation delay

Visto V

os

14
5
4
4

60
12
10
8

75
15
13
10

90
18
15
12

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL= ∞;
CL= 50 pF
(see Fig.17)

t

PZH

/ t

PZL

turn “ON” time

E1to V

os

85
31
25
28

300
60
51
55

375
75
64
69

450
90
77
83

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PZH

/ t

PZL

turn “ON” time

E2to V

os

85
31
25
25

300
60
51
55

375
75
64
69

450
90
77
83

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PZH

/ t

PZL

turn “ON” time

LE to V

os

91
33
26
27

300
60
51
55

375
75
64
69

450
90
77
83

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PZH

/ t

PZL

turn “ON” time

Snto V

os

88
32
26
25

300
60
51
50

375
75
64
63

450
90
77
75

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

E1 to V

os

69
25
20
20

250
50
43
40

315
63
54
50

375
75
64
60

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

E2 to V

os

72
26
21
19

250
50
43
40

315
63
54
50

375
75
64
60

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

LE to V

os

83
30
24
26

275
55
47
45

345
69
59
56

415
83
71
68

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

Sn to V

os

80
29
23
24

275
55
47
48

345
69
59
60

415
83
71
72

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

December 1990 9

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

t

su

set-up time

Snto LE

60
12
10
18

17
6
5
9

75
15
13
23

90
18
15
27

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.19)

t

h

hold time

Snto LE

5
5
5
5

−8

−3

−2

−4

5
5
5
5

5
5
5
5

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.19)

t

W

LE minimum pulse
width

HIGH

100
20
17
25

11
1
3
7

125
25
21
31

150
30
26
38

ns 2.0

4.5

6.0

4.5

0
0
0

−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.19)

SYMBOL PARAMETER

T

amb

(°C)

UNIT

TEST CONDITIONS

74HC

V

CC

(V)

V

EE

(V)

OTHER+25 −40 to +85 −40 to +125

min. typ. max. min. max. min. max.

December 1990 10

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

DC CHARACTERISTICS FOR 74HCT

Voltages are referenced to GND (ground = 0)

Note to HCT types

1. The value of additional quiescent supply current (∆I

CC

) 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.

SYMBOL PARAMETER

T

amb

(°C)

UNIT

TEST CONDITIONS

74HCT

V

CC

(V)

V

EE

(V)

V

I

OTHER+25 −40 to +85 −40 to +125

min. typ. max. min. max. min. max.

V

IH

HIGH level input
voltage

2.0 1.6 2.0 2.0 V 4.5
to

5.5

V

IL

LOW level input
voltage

1.2 0.8 0.8 0.8 V 4.5
to

5.5

±I

I

input leakage
current

0.1 1.0 1.0 µA 5.5 0 V

CC

or
GND

±I

S

analog switch
OFF-state current
per channel

0.1 1.0 1.0 µA 10.0 0V

IH

or
V

IL

VS =
V

CC

− V

EE

(see
Fig.10)

±I

S

analog switch
OFF-state current
all channels

0.4 4.0 4.0 µA 10.0 0V

IH

or
V

IL

VS =
V

CC

− V

EE

(see
Fig.10)

±I

S

analog switch
ON-state current

0.4 4.0 4.0 µA 10.0 0 V

IH

or
V

IL

VS =
V

CC

− V

EE

(see
Fig.11)

I

CC

quiescent supply
current

8.0

16.0

80.0

160.0

160.0

320.0

µA 5.5

5.0

0

−5.0

V

CC

or
GND

V

is=VEE

or VCC;
V

os=VCC

or V

EE

∆I

CC

additional
quiescent supply
current per input
pin for unit load
coefficient is 1
(note 1)

100

360 450 490 µA 4.5

to

5.5

0 V

CC

−2.1 V

other
inputs
at V

CC

or

GND

INPUT UNIT LOAD COEFFICIENT

E1, E

2

S

n

LE

0.50

0.50

1.5

December 1990 11

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

AC CHARACTERISTICS FOR 74HCT

GND = 0 V; t

r=tf

= 6 ns; CL= 50 pF

SYMBOL PARAMETER

T

amb

(°C)

UNIT

TEST CONDITIONS

74HCT

V

CC

(V)

V

EE

(V)

OTHER+25 −40 to +85 −40 to +125

min. typ. max. min. max. min. max.

t

PHL

/ t

PLH

propagation delay

Visto V

os

6
4

12
8

15
10

18
12

ns 4.5

4.50−4.5

RL= ∞;
CL= 50 pF
(see Fig.17)

t

PZH

/ t

PZL

turn “ON” time

E1to V

os

403175

60

94
75

11390ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PZH

/ t

PZL

turn “ON” time

E2to V

os

352670

50

88
63

10575ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PZH

/ t

PZL

turn “ON” time

LE to V

os

423775

60

94
75

11390ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PZH

/ t

PZL

turn “ON” time

Snto V

os

393075

60

94
75

11390ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

E1 to V

os

272055

40

69
50

83
60

ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

E2 to V

os

322660

50

75
63

90
75

ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

LE to V

os

333060

55

75
69

90
83

ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

PHZ

/ t

PLZ

turn “OFF” time

Sn to V

os

332965

55

81
69

98
83

ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.18)

t

su

set-up time

Snto LE

12146

7

15
18

18
21

ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.19)

t

h

hold time

Snto LE

5
5

−1

−2

5
5

5
5

ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.19)

t

W

LE minimum
pulse width HIGH

252513

13

31
31

38
38

ns 4.5

4.50−4.5

RL=1 kΩ;
CL= 50 pF
(see Fig.19)

December 1990 12

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.

December 1990 13

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; T

amb

=25°C

Notes to AC characteristics

1. Adjust input voltage V

is

to 0 dBm level (0 dBm = 1 mW into 600 Ω).

2. Adjust input voltage Visto 0 dBm level at Vosfor 1 MHz (0 dBm = 1 mW into 50 Ω).

Visis the input voltage at a Yn or Z terminal, whichever is assigned as an input.
Vosis the output voltage at a Yn or Z terminal, whichever is assigned as an output.

SYMBOL PARAMETER typ. UNIT

V

CC

(V)

V

EE

(V)

V

is(p−p)

(V)

CONDITIONS

sine-wave distortion

f = 1 kHz

0.04

0.02%%

2.25

4.5

−2.25

−4.5

4.0

8.0

R

L

= 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

R

L

= 10 kΩ; CL= 50 pF

(see Fig.14)

switch “OFF” signal

feed-through

−50

−50dBdB

2.25

4.5

−2.25

−4.5

note 1 R

L

= 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
220mVmV

4.5

4.5

0

−4.5

RL= 600 Ω; CL= 50 pF;
f = 1 MHz (E1, E2or Sn,
square-wave between V

CC

and GND, tr=tf= 6 ns)
(see Fig.16)

f

max

minimum frequency response

(−3dB)

160
170

MHz
MHz

2.25

4.5

−2.25

−4.5

note 2 RL=50Ω; CL= 10 pF

(see Figs 13 and 14)

C

S

maximum switch capacitance

independent (Y)
common (Z)

5
25pFpF

Fig.12 Typical switch “OFF” signal feed-through as a function of frequency.

Test conditions:
V

CC

= 4.5 V; GND = 0 V; VEE= −4.5 V;

R

L

=50Ω; R

source

=1 kΩ.

December 1990 14

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

Fig.13 Typical frequency response.

Test conditions:
V

CC

= 4.5 V; GND = 0 V; VEE= −4.5 V;

R

L

=50Ω; R

source

=1 kΩ.

Fig.14 Test circuit for measuring sine-wave

distortion and minimum frequency response.

Fig.15 Test circuit for measuring switch “OFF”

signal feed-through.

Fig.16 Test circuit for measuring crosstalk between control and any switch.

The crosstalk is defined as follows
(oscilloscope output):

December 1990 15

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

AC WAVEFORMS

Fig.17 Waveforms showing the input (Vis) to output

(Vos) propagation delays.

Fig.18 Waveforms showing the turn-ON and

turn-OFF times.

HC : VM= 50%; VI= GND to VCC.

HCT: V

M

= 1.3 V; VI= GND to 3 V.

Fig.19 Waveforms showing the set-up and hold

times from Sninputs to LE input, and
minimum pulse width of LE.

HC : VM= 50%; VI= GND to VCC.

HCT: V

M

= 1.3 V; VI= GND to 3 V.

December 1990 16

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

TEST CIRCUIT AND WAVEFORMS

Fig.20 Test circuit for measuring AC performance.

Conditions

TEST SWITCH V

is

t

PZH

V

EE

V

CC

t

PZL

V

CC

V

EE

t

PHZ

V

EE

V

CC

t

PLZ

V

CC

V

EE

others open pulse

FAMILY AMPLITUDE V

M

tr; t

f

f

max

;

PULSE WIDTH

OTHER

74HC V

CC

50%

< 2 ns 6 ns

74HCT 3.0 V 1.3 V < 2 ns 6 ns

C

L

= load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values).

R

T

= termination resistance should be equal to the output impedance ZO of the pulse generator.

t

r

=tf= 6 ns; when measuring f

max

, there is no constraint on tr, tf with 50% duty factor.

Conditions

TEST SWITCH V

is

t

PZH

V

EE

V

CC

t

PZL

V

CC

V

EE

t

PHZ

V

EE

V

CC

t

PLZ

V

CC

V

EE

others open pulse

FAMILY AMPLITUDE V

M

tr; t

f

f

max

;

PULSE WIDTH

OTHER

74HC V

CC

50%

< 2 ns 6 ns

74HCT 3.0 V 1.3 V < 2 ns 6 ns

C

L

= load capacitance including jig and probe capacitance (see AC CHARACTERISTICS for values).

R

T

= termination resistance should be equal to the output impedance ZO of the pulse generator.

t

r

=tf= 6 ns; when measuring f

max

, there is no constraint on tr, tf with 50% duty factor.

Fig.21 Input pulse definitions.

December 1990 17

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

74HC/HCT4351

PACKAGE OUTLINES

See

“74HC/HCT/HCU/HCMOS Logic Package Outlines”

.