Datasheet M74HCT241PU, M74HCT240PU Datasheet (SGS Thomson Microelectronics)

M54HCT240/241/244PU

M74HCT240/241/244PU

OCTAL BUS BUFFERSWITH PULL-UP INPUT NETWORK

B1R

(PlasticPackage)

ORDER CODES :

M54HCTXXXPUF1R M74HC T XXXPUM1R
M74HCT XXXPUB1R

F1R

(Ceramic Package)

M1R

(Micro Package)

PIN CONNECTION (top view)

.HIGH SPEED

t

PD

= 14 ns(TYP.) at VCC=5V

.LOWPOWER DISSIPATION

I

CCH

= 200 µA (TYP.)at TA=25oC

.COMPATIBLEWITH TTL OUTPUTS

V

IH

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

.CURRENT SOURCES ON DATA INPUTS

ELIMINATETHE NEED OF EXTERNAL PULL­UP RESISTORS

.OUTPUTDRIVECAPABILITY

15 LSTTL LOADS

.SYMMETRICALOUTPUT IMPEDANCE

|I

OH

|=IOL= 6 mA (MIN)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.PIN AND FUNCTIONCOMPATIBLE

WITH 54/74LS240/241/244

DESCRIPTION

The M54/74HCT240PU, HCT241PU and
HCT244PU are high speed CMOS OCTAL BUS
BUFFERs fabricated in silicon gate C

2

MOS
technology.
Theyhave thesamehighspeedperformance oftheir
non-PU counterpart, plus a unique input topology
which incorporates a constant current source for
eachdatainput. This resultsis in asmall I

IL

(-150µA
Typ.)wich can fix any data inputin the HIGH Logic
Levelwhenitisleftfloating,thuseliminatingtheneed
of external pull-up resistor network.

This feature makes these devices particularly
suitableinallapplications wherea databus needsto
beinterfacedtomanualcontrolslike:rotaryselectors,
keyboards, dip-switches, etc. The inputs are
compatible with TTL, NMOS and CMOS output
voltage levels. They achieve the high speed
operation similar to equivalent LSTTL while
maintaining the CMOS lowpower dissipation.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.

HCT 244PUHCT241PUHCT240PU

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION (HCT240PU)

PIN No SYMBOL NAME AND FUNCTION

1 1G Output Enable Input
2, 4, 6, 8 1A1 to 1A4 Data Inputs
9, 7, 5, 3 2Y1 to 2Y4 Data Outputs

11, 13, 15,172A1 to 2A4 Data Inputs

18, 16, 14,121Y1 to 1Y4 Data Outputs

19 2G Output Enabel Input
10 GND Ground (0V)
20 V

CC

Positive SupplyVoltage

PIN DESCRIPTION (HCT244PU)

PIN No SYMBOL NAME AND FUNCTION

1 1G Output Enable Input
2, 4, 6, 8 1A1 to 1A4 Data Inputs
9, 7, 5, 3 2Y1 to 2Y4 Data Outputs

11, 13, 15,172A1 to 2A4 Data Inputs

18, 16, 14,121Y1 to 1Y4 Data Outputs

19 2G Output Enabel Input
10 GND Ground (0V)
20 V

CC

Positive SupplyVoltage

PIN DESCRIPTION(HCT241PU)

PIN No SYMBOL NAME AND FUNCTION

1 1G Output Enable Input
2, 4, 6, 8 1A1 to 1A4 Data Inputs
9, 7, 5, 3 2Y1 to 2Y4 Data Outputs

11, 13, 15,172A1 to 2A4 Data Inputs

18, 16, 14,121Y1 to 1Y4 Data Outputs

19 2G Output Enabel Input
10 GND Ground (0V)
20 V

CC

PositiveSupply Voltage

IEC LOGIC SYMBOLS

HCT 244PUHCT241PUHCT240PU

M54/M74HCT240PU/241PU/244PU

TRUTH TABLE

INPUT OUTPUT

G G(HCT241PU) An Yn(HCT240PU) Yn (HCT241PU) Yn(HCT244PU)

LHLHLL
LHHLHH

HLXZZZ

X: ”H” or”L”
Z: Highimpedance

CIRCUIT SCHEMATIC (1/8 PACKAGE)

HCT2 40PU HCT 241/244PU

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

SupplyVoltage -0.5 to +7 V

V

I

DC Input Voltage -0.5 to VCC+ 0.5 V

V

O

DC Output Voltage -0.5 to VCC+ 0.5 V

I

IK

DC Input Diode Current ± 20 mA

I

OK

DC Output Diode Current ± 20 mA

I

O

DC Output Source Sink CurrentPer OutputPin ± 35 mA

ICCor I

GND

DC VCCor Ground Current ± 70 mA

P

D

PowerDissipation 500 (*) mW

T

stg

StorageTemperature -65 to +150

o

C

T

L

Lead Temperature (10 sec) 300

o

C

AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamagetothedevicemayoccur.Functionaloperationundertheseconditionisnotimplied.
(*)500 mW:≅ 65

o

C derateto300mW by 10mW/oC: 65oCto85oC

M54/M74HCT240PU/241PU/244PU

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

CC

SupplyVoltage 4.5 to 5.5 V

V

I

Input Voltage 0 to V

CC

V

V

O

OutputVoltage 0 to V

CC

V

T

op

OperatingTemperature: M54HC Series

M74HCSeries

-55 to +125

-40 to +85

o

C

o

C

tr,t

f

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

DC SPECIFICATIONS

Symbol Parameter

TestConditions Value

Unit

V

CC

(V)

TA=25oC

54HC and 74HC

-40 to 85oC
74HC

-55 to 125oC
54HC

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

V

IH

High Level Input
Voltage

4.5
to

5.5

2.0 2.0 2.0 V

V

IL

Low Level Input
Voltage

4.5
to

5.5

0.8 0.8 0.8 V

V

OH

High Level
OutputVoltage

4.5

VI=

V

IH

or

V

IL

IO=-20 µA 4.4 4.5 4.4 4.4

V

IO=-6.0 mA 4.18 4.31 4.13 4.10

V

OL

Low Level Output
Voltage

4.5

VI=

V

IH

or

V

IL

IO=20µA 0.0 0.1 0.1 0.1

V

IO= 6.0 mA 0.17 0.26 0.33 0.4

I

IL

Input Low Current 4.5

VI= 0.4 V

-50 -130 -250 -30 -350 -20 -400
mA

5.5 -50 -180 -300 -30 -400 -20 -450

I

IN

inputLeakage
Current (EN inp.)

5.5 VIN=VCCor GND ±0.1 ±1.0 ±1.0 µA

I

OZ

3 State Output
Off State Current

5.5 VIN=VIHor V

IL

VO=VCCor GND

±0.5 ±5.0 ±10 µA

I

CCH

QuiescentSupply
Current

5.5 VI=V

CC

200 600 800 1000 µA

∆I

CC

Additionalworst
case supply
current

5.5 Per Input pin
VI= 0.5V or 2.4V

OtherInputs at

VCCor GND

3.0 3.9 4.0 mA

M54/M74HCT240PU/241PU/244PU

AC ELECTRICAL CHARACTERISTICS(Input tr=tf=6ns)

Symbol Parameter

TestConditions Value

Unit

V

CC

(V)

C

L

(pF)

TA=25oC

54HC and 74HC

-40 to 85oC
74HC

-55 to 125oC
54HC

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

t

TLH

t

THL

OutputTransition
Time

4.5 50 7 12 15 18 ns

t

PLH

t

PHL

Propagation
Delay Time
(for 240)

4.5 50 18 28 35 42 ns

4.5
150

22 34 43 51

ns

t

PLH

t

PHL

Propagation
Delay Time
(for241/244)

4.5 50 20 31 39 47 ns

4.5
150

24 37 46 56

ns

t

PZL

t

PZH

OutputEnable
Time

4.5 50 RL=1KΩ 22 34 43 51 ns

4.5 150 RL=1KΩ 26 40 50 60 ns

t

PLZ

t

PHZ

OutputDisable
Time

4.5 50 RL=1KΩ 25 36 45 54 ns

C

IN

InputCapacitance 5 10 10 10 pF

CPD(*) PowerDissipation

Capacitance

100

pF

TEST CIRCUI T ICC(Opr.)

HCT 240PU

M54/M74HCT240PU/241PU/244PU

SWITCHING CHARACTERISTICS TEST WAVEFORM

M54/M74HCT240PU/241PU/244PU

Plastic DIP20 (0.25) MECHANICAL DATA

DIM.

mm inch

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

a1 0.254 0.010

B 1.39 1.65 0.055 0.065

b 0.45 0.018

b1 0.25 0.010

D 25.4 1.000
E 8.5 0.335

e 2.54 0.100

e3 22.86 0.900

F 7.1 0.280

I 3.93 0.155

L 3.3 0.130

Z 1.34 0.053

P001J

M54/M74HCT240PU/241PU/244PU

Ceramic DIP20 MECHANICAL DATA

DIM.

mm inch

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

A 25 0.984
B 7.8 0.307
D 3.3 0.130
E 0.5 1.78 0.020 0.070

e3 22.86 0.900

F 2.29 2.79 0.090 0.110

G 0.4 0.55 0.016 0.022

I 1.27 1.52 0.050 0.060

L 0.22 0.31 0.009 0.012

M 0.51 1.27 0.020 0.050

N1 4° (min.), 15° (max.)

P 7.9 8.13 0.311 0.320

Q 5.71 0.225

P057H

M54/M74HCT240PU/241PU/244PU

SO20 MECHANICAL DATA

DIM.

mm inch

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 12.60 13.00 0.496 0.512

E 10.00 10.65 0.393 0.419

e 1.27 0.050

e3 11.43 0.450

F 7.40 7.60 0.291 0.299

L 0.50 1.27 0.19 0.050

M 0.75 0.029

S8°(max.)

P013L

M54/M74HCT240PU/241PU/244PU

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consequences ofuse of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is grantedbyimplication or otherwiseunderany patentorpatentrights ofSGS-THOMSON Microelectronics.Specificationsmentioned
in this publicationare subject to change without notice. This publication supersedes andreplaces all informationpreviously supplied.
SGS-THOMSONMicroelectronicsproducts arenotauthorizedfor useas criticalcomponents in life support devicesorsystemswithoutexpress
written approval ofSGS-THOMSON Microelectonics.

 1994SGS-THOMSON Microelectronics -All Rights Reserved

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M54/M74HCT240PU/241PU/244PU