Datasheet M74HC154B1 Specification

4 TO 16 LINE DECODER/DEMULTIPLEXER

.HIGH SPEED

.t

= 15 ns(TYP.) at VCC=5V

PD

.LOWPOWERDISSIPATION

ICC=4µA(MAX.) at TA=25°C

.HIGH NOISEIMMUNITY

V

NIH=VNIL

=28%VCC(MIN.)

.OUTPUT DRIVE CAPABILITY

15 LSTTL LOADS

.SYMMETRICALOUTPUT IMPEDANCE

IOH =IOL= 4 mA (MIN.)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.WIDE OPERATINGVOLTAGE RANGE

VCC(OPR)= 2V to 6 V

.PIN ANDFUNCTION COMPATIBLE

WITH 54/74LS154

M74HC154

B1R

(PlasticPackage)

ORDER CODES :

M74HC 154B1R M74H C154M1R

M1R

(Micro Package)

DESCRIPTION

The74HC154 is ahigh speedCMOS4 TO 16-LINE
DECODER/DEMULTIPLEXER fabricated in silicon
gateC2MOStechnology. Ithasthe same high speed
performanceofLSTTLcombinedwithtrueCMOSlow
power consumption.

A binary code applied to the fourinputs (A toD) pro­vides alow levelattheselectedoneofsixteenoutputs
excluding the other fifteen outputs, when both the
strobe inputs, G1 andG2, areheldlow. When either
strobe input isheldhigh,the decording function is in­hibited to keep all outputs high. The strobe function
makes it easytoexpand the decoding lines through
cascading, and simplifies the design of address de­coding circuits in memory controlsystems.

Allinputsareequipped withprotectioncircuitsagainst
staticdischarge and transient excess voltage.

NC =
No Internal
Connection

PIN CONNECTIONS(top view)

October 1993

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M74HC154

TRUTH TABLE

INPUTS SELECTED

G1 G2 D C B A

LLLLLL Y0
LLLLLH Y1
LLLLHL Y2
LLLLHH Y3
LLLHLL Y4
LLLHLH Y5
LLLHHL Y6
LLLHHH Y7
LLHLLL Y8
LLHLLH Y9
L L H L H L Y10
L L H L H H Y11
LLHHLL Y12
L L H H L H Y13
L L H H H L Y14
LLHHHH Y15
X H X X X X NONE

H X X X X X NONE

X: Don’t Care

OUTPUT (L)

LOGIC DIAGRAM

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M74HC154

INPUT AND OUTPUT EQUIVALENT CIRCUIT

IEC LOGIC SYMBOLS

PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

1, 2, 3, 4, 5,

6, 7, 8, 9, 10,

11, 13, 14,

15, 16, 17

18, 19 G1, G2 Enable Inputs (Active

23, 22, 21, 20 A to D Address Inputs

12 GND Ground (0V)
24 V

Y0 to Y15 Outputs (Active LOW)

LOW)

CC

Positive Supply Voltage

ABSOLU TE MAXIMU M RAT INGS

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

or I

I

CC

P

D

T

stg

T

L

AbsoluteMaximumRatingsarethose values beyond whichdamage tothedevicemayoccur. Functional operation under these conditionisnotimplied.
(*)500 mW: ≅ 65oC derateto300mWby 10mW/oC: 65oCto85oC

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

o

C

o

C

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M74HC154

RECO MM ENDED OPERATIN G CONDI TIONS

Symbol Parameter Value Unit

V

V

V
T
t

r,tf

DC SPECIFICATIO NS

Symbol Parameter

V

IH

V

V

OH

V

OL

I

I

CC

Supply Voltage 2 to 6 V

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature: -40 to +85

op

CC
CC

Input Rise and Fall Time VCC= 2 V 0 to 1000 ns

V

= 4.5 V 0 to 500

CC

V

= 6 V 0 to 400

CC

Test Conditions Value

=25oC -40 to 85oC

V

(V)

CC

T

A

Min. Typ. Max. Min. Max.

High Level Input Voltage 2.0 1.5 1.5

4.5 3.15 3.15

6.0 4.2 4.2

Low Level Input

IL

Voltage

2.0 0.5 0.5

4.5 1.35 1.35

6.0 1.8 1.8

High Level Output Voltage 2.0

Low Level Output Voltage 2.0

Input Leakage Current 6.0 VI=VCCor GND ±0.1 ±1 µA

I

V

=

I

V

IH

or

V

IL

V

I

V

IH

or

V

IL

IO=-20 µA

=-4.0 mA 4.18 4.31 4.13

O

=-5.2 mA 5.68 5.8 5.63

O

=

IO=20µA

= 4.0 mA 0.17 0.26 0.33

O

= 5.2 mA 0.18 0.26 0.33

O

4.5 4.4 4.5 4.4

6.0 5.9 6.0 5.9

4.5 I

6.0 I

4.5 0.0 0.1 0.1

6.0 0.0 0.1 0.1

4.5 I

6.0 I

1.9 2.0 1.9

0.0 0.1 0.1

Quiescent Supply Current 6.0 VI=VCCor GND 4 40 µA

V
V

o

C

Unit

V

V

V

V

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M74HC154

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

Test Conditions Value

Symbol Parameter

t
t

TLH
THL

Output Transition Time 2.0 30 75 95

V

(V)

CC

TA=25oC -40 to 85oC

Min. Typ. Max. Min. Max.

4.5 8 15 19

6.0 7 13 16

t
t

PLH
PHL

Propagation Delay Time
(A, B, C, D - Y)

2.0 65 175 220

4.5 19 35 44

6.0 16 30 37

t
t

PLH
PHL

Propagation Delay Time
(G1, G2 - Y)

2.0 55 160 200

4.5 17 32 40

6.0 15 27 34

C

C

PD

(*) CPDisdefined as the value ofthe IC’sinternal equivalent capacitance whichis calculated fromthe operatingcurrentconsumption without load.
(Referto Test Circuit). Average operting current canbe obtained by the followingequation. ICC(opr) = CPD•VCC•fIN+I

Input Capacitance 5 10 10 pF

IN

(*) Power Dissipation Capacitance 57 pF

CC

Unit

ns

ns

ns

SWITCHING CHARACTERISTICS TEST
CIRCUIT

TEST CIRCUIT ICC(Opr.)

INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHINGCHARACTERISTICSTEST.

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M74HC154

Plastic DIP24 (0.25) MECHANICAL DATA

DIM.

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

a1 0.63 0.025

b 0.45 0.018

b1 0.23 0.31 0.009 0.012

b2 1.27 0.050

D 32.2 1.268

E 15.2 16.68 0.598 0.657

e 2.54 0.100

e3 27.94 1.100

F 14.1 0.555

I 4.445 0.175

L 3.3 0.130

mm inch

6/8

P043A

SO24 MECHANICAL DATA

M74HC154

DIM.

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

A 2.65 0.104
a1 0.10 0.20 0.004 0.007
a2 2.45 0.096

b 0.35 0.49 0.013 0.019

b1 0.23 0.32 0.009 0.012

C 0.50 0.020
c1 45° (typ.)

D 15.20 15.60 0.598 0.614

E 10.00 10.65 0.393 0.420

e 1.27 0.05

e3 13.97 0.55

F 7.40 7.60 0.291 0.299
L 0.50 1.27 0.19 0.050

S8°(max.)

mm inch

L

A

a2

b

e3

D

24 13

112

e

F

s

a1

c1

b1

C

E

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M74HC154

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consequences of useof suchinformation nor forany infringement ofpatents or other rights of third parties which may results from its use. No
license is granted byimplication or otherwiseunder any patentor patent rights ofSGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subjectto changewithout notice. This publication supersedes andreplaces all information previously supplied.
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written approval of SGS-THOMSON Microelectonics.

 1994SGS-THOMSON Microelectronics- All Rights Reserved

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