Datasheet M74HC298 Datasheet (SGS Thomson Microelectronics)

QUAD 2 CHANNEL MULTIPLEXER/REGISTER

.HIGH SPEED

f

= 73 MHz(typ.) AT VCC=5V

MAX

.LOWPOWERDISSIPATION

ICC=4µA(MAX.) AT TA=25°C

.HIGH NOISEIMMUNITY

V

NIH=VNIL

=28%VCC(MIN.)

.OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.SYMMETRICALOUTPUT IMPEDANCE

IOH =IOL= 4 mA(MIN.)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.WIDE OPERATINGVOLTAGE RANGE

VCC(OPR)= 2V TO6 V

.PIN ANDFUNCTION COMPATIBLE

WITH 54/74LS298

DESCRIPTION

The M54/74HC298 isahighspeedCMOSQUAD2­CHANNEL MULTIPLEXER/REGISTER fabricated
in silicongate C2MOStechnology.

It has the same high speed performance of LSTTL
combined withtrue CMOSlowpower consumption.
Thesecircuits are controlled by the signals WORD
SELECT and CLOCK. When the WORD SELECT
input is taken low Word 1 (A1, B1, C1 and D1) is
presented to the input of the flip-flops, and when
WORDSELECT ishighWord 2(A2,B2,C2 and D2)
is presented to theinputs of theflip-flops. Theselect
wordis clockedtothe outputterminals onthe nega­tive edge oftheclockpulse. Allinputsare equipped
with protection circuitsagainst static discharge and
transient excess voltage.

M54HC298
M74HC298

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC 298F1R M74H C298M1R
M74HC 298B1R M74HC2 98C1R

PIN CONNECTIONS(top view)

F1R

(CeramicPackage)

C1R

(Chip Carrier)

INPUT AND OUTPUT EQUIVALENT CIRCUIT

October 1992

NC =
No Internal
Connection

1/11

M54/M74HC298

TRUTH TABLE

INPUTS OUTPUTS

WORD SELECT CLOCK QA QB QC QD

La1b1c1d1

Ha2b2c2d2

X : DON’T CARE(INCLUDINGTRANSITION)
a1, a2, ETC : THE LEVELOF STEAY STATEINPUT ATa1, a2,etc.
QA0, QB0,ETC: THE LEVEL OF QA, QB,ETC ENTEREDON THE MOSTRECENT NEGATIVETRANSITION OF THECLOCK INPUT.

LOGI C DI AGRAM

X QA0 QB0 QC0 QD0

2/11

M54/M74HC298

PIN DESC RIPTION

IEC LOGIC SYMBOL

PIN No SYMBOL NAME AND FUNCTION

1, 2, 5, 6 A2, B2,

Word 2 Data Inputs

C2, D2

3, 4, 7, 9 A1, B1,

Word 1 Data Inputs

C1, D1

12 to 15 QA to QD Outputs

10 WORD

Word Select Input

SELECT

11 CLOCK Clock Input (HIGH to

LOW, Edge-triggered)

8 GND Ground (0V)

16 V

CC

Positive Supply Voltage

ABSOLU TE M AXIMU M R AT 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

AbsoluteMaximumRatingsarethose valuesbeyond whichdamage to thedevice mayoccur.Functional operation under these conditionisnotimplied.
(*)500 mW: ≅ 65oC derateto300 mWby 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 (10sec) 300

L

o

C

o

C

RECO MM ENDED OPERATI N G CO NDI TIONS

Symbol Parameter Value Unit

V

V

T

t

V

r,tf

Supply Voltage 2 to 6 V

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature: M54HC Series

op

M74HC Series

CC
CC

-55 to +125

-40 to +85

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

V

= 4.5 V 0 to 500

CC

= 6 V 0 to 400

V

CC

V
V

o

C

o

C

3/11

M54/M74HC298

DC SPECIFICATIONS

Symbol Parameter

V

V

V

V

I

High Level Input

IH

Voltage

Low Level Input

IL

Voltage

High Level

OH

Output Voltage

Low Level Output

OL

Voltage

I

Input Leakage

I

Current
Quiescent Supply

CC

Current

Test Conditions Value

V

(V)

CC

=25oC

A

54HC and 74HC

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

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

T

2.0 1.5 1.5 1.5

4.5 3.15 3.15 3.15

6.0 4.2 4.2 4.2

2.0 0.5 0.5 0.5

4.5 1.35 1.35 1.35

6.0 1.8 1.8 1.8

2.0

4.5 4.4 4.5 4.4 4.4

6.0 5.9 6.0 5.9 5.9

4.5 I

6.0 I

2.0

4.5 0.0 0.1 0.1 0.1

6.0 0.0 0.1 0.1 0.1

4.5 I

6.0 I

6.0

=

V

I

IO=-20 µA

V

IH

or

V

IL

=-4.0 mA 4.18 4.31 4.13 4.10

O

=-5.2 mA 5.68 5.8 5.63 5.60

O

V

=

I

IO=20µA

V

IH

or

V

IL

= 4.0 mA 0.17 0.26 0.33 0.40

O

= 5.2 mA 0.18 0.26 0.33 0.40

O

VI=VCCor GND ±0.1 ±1 ±1 µA

1.9 2.0 1.9 1.9

0.0 0.1 0.1 0.1

6.0 VI=VCCor GND 4 40 80 µA

V

V

V

V

4/11

M54/M74HC298

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

Test Conditions Value

T

=25oC

Symbol Parameter

t
t

TLH
THL

Output Transition
Time

V

CC

(V)

2.0 30 75 95 110

4.5 8151922

A

54HC and 74HC

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

6.0 7131619

t

PLH

t

PHL

f

MAX

Propagation
Delay Time
(CLOCK - Q)

Maximum Clock
Frequency

2.0 45 125 155 190

4.5 15 25 31 38

6.0 13 21 26 32

2.0 7 22 5.6 4.6

4.5 35 67 28 23

6.0 41 79 33 25

t

W(H)

t

W(L)

Minimum Pulse
Width
(CLOCK)

Minimum Set-up

t

s

Time
(A, B, C, D)

t

Minimum Set-up

s

Time
(W. S.)

Minimum Hold

t

h

Time
(A, B, C, D)

Minimum Hold

t

h

Time
(W. S.)

C

C

PD

Input Capacitance 5 10 10 10 pF

IN

(*) Power Dissipation

2.0 18 75 95 110

4.5 6151922

6.0 6131619

2.0 12 50 65 75

4.5 3101315

6.0 2 9 11 13

2.0 30 75 95 110

4.5 8151922

6.0 6131619

2.0 25 30 40

4.5 5 6 8

6.0 4 5 7

2.0 0 0 0

4.5 0 0 0

6.0 0 0 0

39

Capacitance

(*) CPDisdefined as the value ofthe IC’sinternal equivalent capacitance which is calculated fromthe operatingcurrent consumption without load.
(Referto Test Circuit).Average operting currentcanbe obtained by the followingequation.ICC(opr) = CPD•VCC•fIN+ICC/4 (perbit),and theCPDfor
operating current can be obtained by the following equation: CPD= 27 +12 xn

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

ns

ns

MHz

ns

ns

ns

ns

ns

pF

5/11

M54/M74HC298

SWITCHING CHARACTERISTICS TEST WAVEFORM

TEST CIRCUIT

TRANSITIONTIME AND VIH,VILOFINPUTWAVEFORMIS THE SAMEAS THATIN CASEOFSWITCHINGCHARACTERISTICSTEST.

6/11

Plastic DIP16 (0.25) MECHANICAL DATA

M54/M74HC298

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/M74HC298

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

SO16 (Narrow) MECHANICAL DATA

M54/M74HC298

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/M74HC298

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/M74HC298

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consequences of useof suchinformation nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted byimplication or otherwiseunder any patentor patentrights ofSGS-THOMSON Microelectronics.Specificationsmentioned
in this publication are subjectto changewithout notice. This publication supersedes andreplaces all information previouslysupplied.
SGS-THOMSON Microelectronicsproducts are not authorized foruse ascritical componentsin life supportdevices or systems without express
written approval of SGS-THOMSON Microelectonics.

 1994SGS-THOMSON Microelectronics- All Rights Reserved

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11/11