Datasheet M74HCT158, M74HCT157 Datasheet (SGS Thomson Microelectronics)

HCT157QUAD 2 CHANNEL MULTIPLEXER

HCT158 QUAD2 CHANNEL MULTIPLEXER (INV.)

.HIGH SPEED

tPD= 21 ns (TYP.) AT VCC=5V

.LOWPOWER DISSIPATION

ICC=4 µA (MAX.) AT TA=25 °C

.COMPATIBLE WITHTTL OUTPUTS

VIH= 2V (MIN.) VIL= 0.8V (MAX)

.OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.SYMMETRICAL OUTPUT IMPEDANCE

IOH =IOL= 4 mA (MIN.)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.PIN AND FUNCTION COMPATIBLE

WITH 54/74LS157/158

M54HCT157/158
M74HCT157/158

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC TXXX F 1R M74H CTXXXM1R
M74HC TXXX B1R M74HCT XXX C1R

F1R

(CeramicPackage)

C1R

(Chip Carrier)

DESCRIPTION

The M54/74HCT157 and the M54/74HCT158 are
high speed CMOS QUAD 2-CHANNEL MULTI­PLEXERs fabricated withsilicongate C2MOStech­nology. They achieve the high speed operation
similar to equivalent LSTTL while maintaining the
CMOS low power dissipation.

These devices consist of four 2-input digital multi­plexerswith common select and strobe inputs.The
HCT158 is an inverting multiplexer while the
HCT157 is a non-inverting multiplexer. When the
STROBEinput is held High, selection of data is in­hibited and all the outputs become Low in the
M74HCT157 and High in theM74HCT158. TheSE­LECT decoding determines whether the A or B in­puts get routed to theircorresponding Y outputs.All
inputs are equipped with protection circuits against
static discharge and transient excess voltage.
M54/74HCT devices are designed to directlyinter­faceHSC2MOSsystemswith TTLandNMOScom­ponents. They are also plug in replacements for
LSTTL devices giving a reduction of power con­sumption.

PIN CONNECTIONS(top view)

HCT157

HCT158

NC =
No Internal
Connection

April1993

1/11

M54/M74HCT157 M54/M74HCT158

CHIP CARRIER

HCT157 HCT158

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION (for HCT157)

PIN No SYMBOL NAME AND FUNCTION

1 SELECT Common Data Select

Input

2, 5, 11, 14 1A to 4A Data Inputs From

Source A

3, 6, 10, 13 1B to 4B Data Inputs From

Source B

4, 7, 9, 12 1Y to 4Y Multiplexer Output

15 STROBE StrobeInput

8 GND Ground (0V)

16 V

2/11

CC

Positive Supply Voltage

PIN DESCRIPTIO N (for HCT158)

PIN No SYMBOL NAME AND FUNCTION

1 SELECT Common Data Select

Input

2, 5, 11, 14 1A to 4A Data Inputs From

Source A

3, 6, 10, 13 1B to 4B Data Inputs From

Source B

4, 7, 9, 12 1Y to 4Y Multiplexer Output

15 STROBE Strobe Input

8 GND Ground (0V)

16 V

CC

Positive Supply Voltage

M54/M74HCT157 M54/M74HCT158

TRUTH TABLE

INPUTS OUTPUTS

STROBE SELECT A B Y (HCT157) Y (HCT158)

HXXXLH

LLLXLH
LLHXHL
LHXLLH
LHXHHL

X:DON’TCARE

IEC LOGIC SYMBOL

HCT157 HCT158

LOGIC DIAGRAM

HCT157 HCT158

3/11

M54/M74HCT157 M54/M74HCT158

ABSOLU TE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

I

or I

CC

P

D

T

stg

T

L

AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamagetothedevicemayoccur.Functionaloperationunder theseconditionisnotimplied.
(*)500 mW:≅65oC derate to300 mW by 10mW/oC: 65oCto85oC

RECO MM ENDED OPERAT I N G CONDI TI ONS

Symbol Parameter Value Unit

V

CC

V

I

V

O

T

op

t

r,tf

Supply Voltage -0.5 to +7 V
DC Input Voltage -0.5 to VCC+ 0.5 V

I

DC Output Voltage -0.5 to VCC+ 0.5 V
DC Input Diode Current ± 20 mA
DC Output Diode Current ± 20 mA
DC Output Source Sink Current Per Output Pin ± 25 mA
DC VCCor Ground Current ± 50 mA

GND

Power Dissipation 500 (*) mW
Storage Temperature -65 to +150
Lead Temperature (10 sec) 300

Supply Voltage 4.5 to 5.5 V
Input Voltage 0 to V
Output Voltage 0 to V
Operating Temperature: M54HC Series

M74HC Series

CC
CC

-55 to +125

-40 to +85

Input Rise and Fall Time (VCC= 4.5 to 5.5V) 0 to 500 ns

o

C

o

C

V
V

o

C

o

C

4/11

DC SPECIFICATIO NS

Symbol Parameter

V

V

V

V

I

∆I

High Level Input

IH

Voltage

Low Level Input

IL

Voltage

High Level

OH

Output Voltage

Low Level Output

OL

Voltage

Input Leakage

I

I

Current
Quiescent Supply

CC

Current
Additional worst

CC

case supply
current

M54/M74HCT157 M54/M74HCT158

Test Conditions Value

T

=25oC

V

(V)

4.5

CC

A

54HC and 74HC

Min. Typ. Max. Min. Max. Min. Max.

2.0 2.0 2.0 V

to

5.5

4.5
to

5.5

VI=

IO=-20 µA 4.4 4.5 4.4 4.4

V

IH

4.5

or

I

=-4.0 mA 4.18 4.31 4.13 4.10

O

V

IL

VI=

IO=20µA 0.0 0.1 0.1 0.1

V

IH

4.5

or

I

= 4.0 mA 0.17 0.26 0.33 0.4

O

V

IL

VI=VCCor GND ±0.1 ±1 ±1 µA

5.5

5.5 VI=VCCor GND 4 40 80 µA

5.5 Per Input pin

VI= 0.5V or

V

= 2.4V

I

Other Inputs at

VCCor GND

IO=0

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

0.8 0.8 0.8 V

2.0 2.9 3.0 mA

V

V

5/11

M54/M74HCT157 M54/M74HCT158

AC ELECTRICAL CHARACTERISTICS (CL=50pF,Inputtr=tf=6ns)

Test Conditions Value

T

=25oC

Symbol Parameter

t

TLH

t

THL

t

PLH

t

PHL

Output Transition
Time

Propagation
Delay Time

V

CC

(V)

4.5 8151922ns

4.5 16 25 31 38 ns

A

54HC and 74HC

Min. Typ. Max. Min. Max. Min. Max.

(A, B - Y)

t
t

PLH
PHL

Propagation
Delay Time

4.5 19 30 38 45 ns

(SELECT - Y)

t
t

PLH
PHL

Propagation
Delay Time

4.5 17 27 34 41 ns

(STROBE - Y)

C

C

PD

(*) CPDisdefinedas the value ofthe IC’s internal equivalent capacitance which is calculatedfromthe operatingcurrent consumption withoutload.
(RefertoTestCircuit).Average opertingcurrent can be obtained bythe followingequation. ICC(opr) = CPD•VCC•fIN+ICC/4(per channel)

Input Capacitance 5 10 10 10 pF

IN

(*) Power Dissipation

Capacitance

HCT157 50 pF
HCT158 60 pF

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

SWITCHING CHARACTERISTICS TEST CIR­CUIT

TEST CIRCUIT ICC(Opr.)

INPUTWAVEFORM ISTHE SAME AS THATIN CASEOF
SWITCHINGCHARACTERISTICSTEST.

6/11

M54/M74HCT157 M54/M74HCT158

Plastic DIP16 (0.25) MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

a1 0.51 0.020

B 0.77 1.65 0.030 0.065

b 0.5 0.020

b1 0.25 0.010

D 20 0.787
E 8.5 0.335

e 2.54 0.100

e3 17.78 0.700

F 7.1 0.280

I 5.1 0.201

L 3.3 0.130

Z 1.27 0.050

mm inch

P001C

7/11

M54/M74HCT157 M54/M74HCT158

Ceramic DIP16/1 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 20 0.787
B 7 0.276
D 3.3 0.130
E 0.38 0.015

e3 17.78 0.700

F 2.29 2.79 0.090 0.110
G 0.4 0.55 0.016 0.022
H 1.17 1.52 0.046 0.060

L 0.22 0.31 0.009 0.012
M 0.51 1.27 0.020 0.050
N 10.3 0.406

P 7.8 8.05 0.307 0.317

Q 5.08 0.200

mm inch

8/11

P053D

M54/M74HCT157 M54/M74HCT158

SO16 (Narrow) MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.75 0.068
a1 0.1 0.2 0.004 0.007
a2 1.65 0.064

b 0.35 0.46 0.013 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.019

c1 45° (typ.)

D 9.8 10 0.385 0.393

E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 8.89 0.350

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M 0.62 0.024

S8°(max.)

mm inch

P013H

9/11

M54/M74HCT157 M54/M74HCT158

PLCC20 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 9.78 10.03 0.385 0.395

B 8.89 9.04 0.350 0.356

D 4.2 4.57 0.165 0.180
d1 2.54 0.100
d2 0.56 0.022

E 7.37 8.38 0.290 0.330

e 1.27 0.050

e3 5.08 0.200

F 0.38 0.015
G 0.101 0.004
M 1.27 0.050

M1 1.14 0.045

mm inch

10/11

P027A

M54/M74HCT157 M54/M74HCT158

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents orother rights of third parties which may results from its use. No
license is grantedby implication or otherwise underany patentor patent rights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publicationare subject to changewithout notice. This publication supersedes andreplaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsin life supportdevices or systemswithout express
written approval of SGS-THOMSON Microelectonics.

 1994 SGS-THOMSON Microelectronics- All RightsReserved

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11/11