Philips 74hc hct4351 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

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

Product specification
File under Integrated Circuits, IC06

December 1990

Philips Semiconductors Product specification

8-channel analog
multiplexer/demultiplexer with latch

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.

74HC/HCT4351

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

to

0

QUICK REFERENCE DATA

VEE= GND = 0 V; T

=25°C; tr=tf= 6 ns

amb

SYMBOL PARAMETER CONDITIONS

/ t

t

PZH

t

/ t

PHZ

C

I

C

PD

C

S

turn “ON” time E1, E2or Snto V

PZL

turn “OFF” time E1, E2or Snto V

PLZ

os

os

CL= 15 pF; RL=1 kΩ; VCC=5 V2735ns

input capacitance 3.5 3.5 pF
power dissipation capacitance per switch notes 1 and 2 25 25 pF
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

2

× fi+∑ {(CL+ C

CC

S

)

× V

CC

where:
fi= input frequency in MHz
fo= output frequency in MHz

2

× fo}

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

ORDERING INFORMATION

See

“74HC/HCT/HCU/HCMOS Logic Package

Information”

CL= output load capacitance in pF
CS= max. switch capacitance in pF

)

∑ {(CL+ C

S

× V

2

× fo} = sum of outputs

CC

VCC= supply voltage in V

TYPICAL

UNIT

HC HCT

21 23 ns

CC

.

December 1990 2

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

PIN DESCRIPTION

PIN NO. SYMBOL NAME AND FUNCTION

4 Z common
3, 14 n.c. not connected
7
8E
9V
10 GND ground (0 V)
11
15, 13, 12 S
17, 18, 19, 16, 1, 6, 2, 5 Y
20 V

E

1
2
EE

enable input (active LOW)
enable input (active HIGH)
negative supply voltage

LE latch enable input (active LOW)

0
0
CC

to S
to Y

2
7

select inputs
independent inputs/outputs
positive supply voltage

74HC/HCT4351

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

FUNCTION TABLE

INPUTS

E

H
X

L
L
L
L

L
L
L
L

L
X

E

1

X
L

H
H
H
H

H
H
H
H

H
X

2

LE S

X
X

H
H
H
H

H
H
H
H

L

↓

2

X
X

L
L
L
L

H
H
H
H

X
X

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

S

1

X

X

X

X

L

L

L

H

H

L

H

H

L

L

L

H

H

L

H

H

X

X

X

X

S

0

CHANNEL

ON

none
none

Y

0

Y

1

Y

2

Y

3

Y

4

Y

5

Y

6

Y

7

(1)
(2)

74HC/HCT4351

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

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

V

CC

±I

IK

±I

SK

±I

S

±I

EE

±I

CC;±IGND

T

stg

P

tot

P

S

DC supply voltage −0.5 +11.0 V
DC digital input diode current 20 mA for VI<−0.5 V or VI> VCC+ 0.5 V
DC switch diode current 20 mA for VS<−0.5 V or VS> VCC+ 0.5 V
DC switch current 25 mA for −0.5 V < VS< VCC+ 0.5 V
DC VEE current 20 mA
DC VCCor GND current 50 mA
storage temperature range −65 +150 °C
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
power dissipation per switch 100 mW

74HC/HCT4351

Note to ratings

1. To avoid drawing V

current out of terminal Z, when switch current flows in terminals Yn, the voltage drop across

CC

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

74HC 74HCT

SYMBOL PARAMETER

UNIT CONDITIONS

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

V

CC

V

CC

V

I

V

S

T

amb

T

amb

t

, t

r

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

EE

DC input voltage range GND V
DC switch voltage range V

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

EE

CC

V

CCVEE

GND V

V

CC

V

V

CC

operating ambient temperature range −40 +85 −40 +85 °C see DC and AC
operating ambient temperature range −40 +125 −40 +125 °C
input rise and fall times

f

6.0

1000
500
400
250

6.0 500 ns

CHARACTERISTICS
VCC= 2.0 V

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

December 1990 5

Philips Semiconductors Product specification

8-channel analog multiplexer/demultiplexer
with latch

MBA334

VCC- VEE(V)

(V)

10

8

6

4

2

0

0246810

operating area

handbook, halfpage

VCC- GND

Fig.6 Guaranteed operating area as a function

of the supply voltages for 74HC4351.

DC CHARACTERISTICS FOR 74HC/HCT

For 74HC: V
For 74HCT: V

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

CC

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

CC

74HC/HCT4351

Fig.7 Guaranteed operating area as a function of

the supply voltages for 74HCT4351.

T

amb

(°C)

TEST CONDITIONS

74HC/HCT

SYMBOL PARAMETER

+25 −40 to +85

−40 to

+125

UNIT

V

CC

(V)

V

(V)

EE

I

S

(µA)

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

R

R

R

∆R

ON

ON

ON

ON

ON resistance
(rail)

ON resistance
(rail)

ON resistance
(rail)

maximum ∆ ON
resistance
between any two
channels

−

100
90
70

150
80
70
60

150
90
80
65

−

9
8
6

−

180
160
130

−

140
120
105

−

160
140
120

−

225
200
165

−

175
150
130

−

200
175
150

−

270
240
195

−

210
180
160

−

240
210
180

Ω
Ω
Ω
Ω

Ω
Ω
Ω
Ω

Ω
Ω
Ω
Ω

Ω
Ω
Ω
Ω

2.0

4.5

6.0

4.5

2.0

4.5

6.0

4.5

2.0

4.5

6.0

4.5

2.0

4.5

6.0

4.5

0
0
0

−4.5
0

0
0

−4.5
0

0
0

−4.5
0

0
0

−4.5

100
1000
1000
1000

100
1000
1000
1000

100
1000
1000
1000

Notes to DC characteristics

1. At supply voltages (V

− VEE) approaching 2.0 V, the analog switch ON-resistance becomes extremely non-linear.

CC

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.

V

is

V

CC

to
V

EE

V

EEVIH

V

CCVIH

V

CC

to
V

EE

V
or
V

or
V

or
V

V
or
V

V

I

IN

IL

IL

IL

IH

IL

December 1990 6