Datasheet M74HCT258, M74HCT257 Datasheet (SGS Thomson Microelectronics)

M54/M74HCT257
M54/M74HCT258

HCT257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

HCT258 QUAD 2 CHANNEL MULTIPLEXER (3-STATE,INVERTING)

.HIGH SPEED

tPD= 16 ns(TYP.) at VCC=5V

.LOWPOWER DISSIPATION

ICC=4µA(MAX.) atTA=25°C

.COMPATIBLE WITH TTL OUTPUTS

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

.OUTPUTDRIVECAPABILITY

15 LSTTLLOADS

B1R

(PlasticPackage)

F1R

(CeramicPackage)

.SYMMETRICALOUTPUT IMPEDANCE

IOH =IOL= 6 mA (MIN.)

.BALANCEDPROPAGATIONDELAYS

t

PLH=tPHL

.PIN AND FUNCTION COMPATIBLE

WITH 54/74LS257/258

M1R

(MicroPackage)

ORDER CODES :

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

C1R

(Chip Carrier)

DESCRIPTION

The M54/74HCT257 and the M54/74HCT258 are
highspeed CMOSMULTIPLEXERsfabricated with
silicongate C2MOS technology.

They have the same high speed performance of
LSTTL combined with true CMOS low power con­sumption.

These IC’s are composed of an independent 2­channelmultiplexer withcommonSELECT andEN­ABLE INPUT.

The M54/74HCT258 is an inverting multiplexer
while the M54/74HCT257 is a non-inverting multi­plexer. When the ENABLE INPUT is held ”High”,
outputs of both IC’sbecome high-impedance state.
IfSELECTINPUTisheld”Low”,”A”dataisselected,
when SELECT INPUT is high ”H”, ”B” data is
chosen.

All inputs are equipped with protection circuits
against static discharge and transient excess volt­age.

This integrated circuit has input and output charac­teristicsthat are fully compatible with 54/74 LSTTL
logic families. M54/74HCT devices are designed to
directly interface HSC2MOSsystems with TTLand
NMOS components. They are also plug in replace-

PIN CONNECTIONS(topview)

HCT257

HCT258

February 1993

1/12

M54/M74HCT257/258

INPUT AND OUTPUT EQUIVALENT CIRCUIT

CHIP CARRIER

HCT257 HCT258

NC = No Internal Connection

PIN DESCRIPTION ( HCT 257)

PIN No SYMBOL NAME AND FUNCTION

1 SELECT Common Data Select

Input
2, 5, 14, 11 1A to 4A Data Input From Source A
3, 6, 13, 10 1B to 4B Data Inputs from Source B

4, 7, 12, 9 1Y to 4Y 3 State Multiplexer

Outputs

15 OE 3 State Output Enable

Inputs (Active LOW)

8 GND Ground (0V)

16 V

CC

Positive Supply Voltage

PIN DESCRIPTION (HCT258)

PIN No SYMBOL NAME AND FUNCTION

1 SELECT Common Data Select

Input
2, 5, 14, 11 1A to 4A Data Input From Source A
3, 6, 13, 10 1B to 4B Data Inputs from Source B

4, 7, 12, 9 1Y to 4Y 3 State Multiplexer

Outputs

15 OE 3 State Output Enable

Inputs (Active LOW)

8 GND Ground (0V)

16 V

CC

Positive Supply Voltage

2/12

IEC LOGIC SYMBOL

LOGIC DIAGRAM

M54/M74HCT257/258

HCT258HCT257

HCT257 HCT258

TRUTH TABLE

OE SELECT A B Y (257) Y (258)

HXXXZZ

LLLXLH
LLHXHL
LHXLLH
LHXHHL

X =DON’TCARE Z = HIGHIMPEDANCE

INPUTS OUTPUTS

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M54/M74HCT257/258

ABSOLU TE MAXIMU M RAT I NG S

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

I

or I

CC

P

D

T

stg

T

AbsoluteMaximumRatingsarethosevalues beyondwhichdamagetothedevicemayoccur.Functionaloperationunder theseconditionisnotimplied.
(*)500 mW:≅ 65oC derateto 300mW by 10mW/oC: 65oCto85oC

RECO MM ENDED OPERATIN G CONDI TI O NS

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 ± 35 mA
DC VCCor Ground Current ± 70 mA

GND

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

L

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

4/12

DC SPECIFICATIO NS

Symbol Parameter

V

V

V

V

I

I

∆I

High Level Input

IH

Voltage

Low Level Input

IL

Voltage

High Level

OH

Output Voltage

Low Level Output

OL

Voltage

3-State Output

OZ

Off State Current

I

Input Leakage

I

Current
Quiescent Supply

CC

Current
Additional worst

CC

case supply
current

M54/M74HCT257/258

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

V

=

IO=20µA 0.0 0.1 0.1 0.1

I

V

IH

4.5

or

I

= 4.0 mA 0.17 0.26 0.33 0.4

O

V

IL

5.5 VI=VCCor GND ±0.5 ±5 ±10 µA

5.5 VI=VCCor GND ±0.1 ±1 ±1 µA

5.5 VI=VCCor GND 1 10 20 µA

5.5 Per Input pin

VI= 0.5V or

VI= 2.4V

Other Inputs at

VCCor GND

-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

5/12

M54/M74HCT257/258

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
(A, B - Y)

t
t

PLH
PHL

Propagation
Delay Time

V

CC

(V)

4.5 7121518ns

4.5

HCT257
HCT258 17 27 34 41

4.5 20 30 38 45 ns

A

54HC and 74HC

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

19 30 38 45 ns

(SELECT - Y)

t

PZL

t

PZH

t

PLZ

t

PHZ

C

C

Output Enable
Time

Output Disable
Time

Input Capacitance 5 10 10 10 pF

IN

Output

OUT

4.5 RL=1KΩ 18 30 38 45 ns

4.5 RL=1KΩ 16 30 38 45 ns

10

Capacitance

C

(*) Power Dissipation

PD

Capacitance

(*) CPDisdefinedas the value ofthe IC’s internal equivalent capacitance which is calculated fromthe operating current consumption withoutload.
(RefertoTest Circuit).Average operting current canbe obtainedby thefollowingequation. ICC(opr) = CPD•VCC•fIN+ICC/4(per Channel)

HCT257
HCT258

34
33

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

pF

pF

6/12

SWITCHING CHARACTERISTICS TEST WAVEFORM

M54/M74HCT257/258

TEST CIRCUIT ICC(Opr.)

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

CPDCALCULATION

CPDis to be calculated with the following
formula by using the measured value of
ICC (opr.) in the test circuit opposite.

I

(

opr

CPD=

f

CC
IN

)

×

V

CC

7/12

M54/M74HCT257/258

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

8/12

P001C

Ceramic DIP16/1 MECHANICAL DATA

M54/M74HCT257/258

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

P053D

9/12

M54/M74HCT257/258

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

10/12

P013H

PLCC20 MECHANICAL DATA

M54/M74HCT257/258

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

P027A

11/12

M54/M74HCT257/258

Information furnished is believed to be accurate and reliable.However, SGS-THOMSONMicroelectronics assumes no responsability for the
consequences of useof such information nor forany infringement of patents orother rights of third parties which may results from itsuse. No
license isgranted byimplication or otherwiseunder any patentor patentrights ofSGS-THOMSONMicroelectronics. Specificationsmentioned
in this publication aresubject to changewithout notice. Thispublication supersedes and replaces all informationpreviouslysupplied.
SGS-THOMSON Microelectronicsproducts arenot authorizedforuse ascritical componentsinlife supportdevices orsystemswithoutexpress
written approvalof SGS-THOMSON Microelectonics.

 1994 SGS-THOMSON Microelectronics- All RightsReserved

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