Datasheet M74HCT244, M74HCT241, M74HCT240 Datasheet (SGS Thomson Microelectronics)

OCTAL BUS BUFFERWITH3 STATE OUTPUTS

HCT24 0: INVERTED-H CT241 /244 NON INVER TED

.HIGH SPEED

tPD= 13 ns(TYP.) at VCC=5V

.LOWPOWER DISSIPATION

ICC=4µA (MAX.) at TA=25oC

.COMPATIBLE WITH TTL OUTPUTS

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

.OUTPUT DRIVE CAPABILITY

15 LSTTLLOADS

.SYMMETRICALOUTPUT IMPEDANCE

|IOH|=IOL=6 mA (MIN)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.PIN AND FUNCTION COMPATIBLE

WITH 54/74LS240/241/244

DESCRIPTION

M54HCT240/241/244

M74HCT240/241/244

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC TXXXF 1R M74HCTXXXM1R
M74HC TXXXB1R M74HCTXXX C1R

F1R

(CeramicPackage)

C1R

(Chip Carrier)

The M54/74HCT240, HCT241 and HCT244 are
high speed CMOS OCTAL BUS BUFFERs
fabricated in silicongate C2MOS technology.
They have the same high speed performance of
LSTTL combined with true CMOS low power
consumption. The designer has a choise of select
combination ofinverting and non-inverting outputs,
symmetrical G (active lowoutputcontrol) input, and
complementary G and G inputs. Each controlinput
governs four BUS BUFFERs.
This integrated circuit has input and output

PIN CONNECTION (top view)

characteristics that are fully compatible with 54/74
LSTTL logic families. M54/74HCT devices are
designed to directly interface HSC2MOS systems
with TTL and NMOS components.
They are also plug in replacements for LSTTL
devices giving a reduction of power consumption.
Thesedevicesaredesigned to be used with3 state
memory address drivers, etc.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.

HCT244HCT241HCT240

September 1993

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M54/M74HCT240/241/244

CHIP CARRIER

HCT244HCT241HCT240

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION (HC T240)

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

PIN DESCRIPTION (HCT241)

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 Supply Voltage

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

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

CC

Positive Supply Voltage

PIN DESCRIPTION (HCT244)

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 Supply Voltage

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IEC LOGIC SYMBOLS

TRUTH TABLE

M54/M74HCT240/241/244

HCT244HCT241HCT240

INPUT OUTPUT

G G (HCT241) An Yn (HCT240) Yn (HCT241) Yn (HCT244)

LHLHLL
LHHLHH

X: ”H” or ”L”
Z: High impedance

HLXZZZ

CIRCUIT SCHEMATIC (1/8 PACKAGE)

HCT240 HCT241/244

3/12

M54/M74HCT240/241/244

ABSOLU TE MAXI MU M RAT INGS

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 beyondwhichdamageto thedevicemayoccur.Functionaloperationunder thesecondition isnotimplied.
(*)500 mW:≅ 65oC derateto 300 mW by 10mW/oC: 65oCto85oC

RECO MM ENDED OPERAT IN G CO NDI TIONS

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 SPECIFICATIONS

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/M74HCT240/241/244

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

=-6.0 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

= 6.0 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 2.4V

Other Inputs at

V

or GND

CC

-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/M74HCT240/241/244

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

Test Conditions Value

T

=25oC

Symbol Parameter

t

TLH

t

THL

t

PLH

t

PHL

t

PLH

t

PHL

t

PZL

t

PZH

t

PLZ

t

PHZ

C

C

Output Transition
Time

Propagation
Delay Time

Propagation
Delay Time

Output Enable
Time

Output Disable
Time

Input Capacitance 5 10 10 10 pF

IN

Output

OUT

V

C

CC

(V)

L

(pF)

4.5 50 7 12 15 18 ns

4.5 50 15 22 28 33 ns

4.5 150 21 30 38 45 ns

4.5 50 15 25 31 38 ns

4.5 150 21 33 41 50 ns

4.5 50 RL=1KΩ 17 30 38 45 ns

4.5 150 R

=1KΩ 23 38 48 57 ns

L

4.5 50 RL=1KΩ 16 30 38 45 ns

A

54HC and 74HC

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

10 pF

Capacitance

(*) Power Dissipation

C

PD

Capacitance

(*) CPDisdefined as the valueof the IC’s internal equivalent capacitance which is calculated fromthe operating current consumption withoutload.
(Referto Test Circuit).Average opertingcurrentcan be obtained bythefollowingequation. ICC(opr) = CPD•VCC•fIN+ICC/8(per circuit)

HCT240

HCT241/244

33
31

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

pF

TEST CIRCUIT ICC(Opr.)

HCT240

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SWITCHING CHARACTERISTICS TEST WAVEFORM

M54/M74HCT240/241/244

7/12

M54/M74HCT240/241/244

Plastic DIP20 (0.25) MECHANICAL DATA

DIM.

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

mm inch

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P001J

M54/M74HCT240/241/244

Ceramic DIP20 MECHANICAL DATA

DIM.

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

mm inch

P057H

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M54/M74HCT240/241/244

SO20 MECHANICAL DATA

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 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.)

mm inch

10/12

P013L

PLCC20 MECHANICAL DATA

M54/M74HCT240/241/244

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

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M54/M74HCT240/241/244

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 forany infringementof patents or other rights of third parties which mayresults from its use. No
license is granted byimplication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to changewithout notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproducts are not authorized foruse ascritical componentsin life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

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