SGS Thomson Microelectronics M74HC7244, M74HC7241, M74HC7240 Datasheet
OCTAL BUS BUFFERWITH3 STATE OUTPUTS
HC7240: INVERTED - HC7241/7244 NON INVERTED
.HIGH SPEED
tPD= 15 ns(TYP.) at VCC=5V
.LOWPOWER DISSIPATION
ICC=4µA (MAX.) at TA=25oC
.HIGH NOISE IMMUNITY
VH= 1.1 V(TYP.) at VCC=5V
.OUTPUTDRIVE CAPABILITY
15 LSTTL LOADS
.SYMMETRICALOUTPUT IMPEDANCE
|IOH|=IOL=6 mA (MIN)
.BALANCEDPROPAGATIONDELAYS
t
PLH=tPHL
.WIDE OPERATINGVOLTAGERANGE
VCC(OPR)= 2V to 6V
.PIN AND FUNCTION COMPATIBLE
WITH 54/74LS240/241/244
DESCRIPTION
TheM54/74HC7240, HC7241andHC7244arehigh
speed CMOSOCTAL BUS BUFFERsfabricated in
silicongate C2MOS technology.
They have the same high speed performance of
LSTTL combined with true CMOS low power
consumption.
The designerhas a choise of select combination of
inverting and non-inverting outputs, symmetricalG
(active low output control) input, and
complementary G andG inputs. Each controlinput
M54HC7240/7241/7244
M74HC7240/7241/7244
B1R
(PlasticPackage)
M1R
(MicroPackage)
ORDER CODE S :
M54HC XXXXF1R M74H CX XXXM1 R
M74HC XXXXB1R M74 HCXXXXC1R
governsfour BUS BUFFERs.
The HC7240,HC7241 and HC7244 have the same
pinconfigurationandfunctionastheHC240,HC241
and HC244 and they have a hysteresis
characteristics with each input so can be used as a
line receiver, etc.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
F1R
(CeramicPackage)
C1R
(Chip Carrier)
PIN CONNECTION (top view)
October 1993
HC7244HC724 1HC7240
1/12
M54/M74HC7240/7241/7244
CHIP CARRIER
HC7244HC724 1HC7240
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION (HC7240)
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 (HC7241)
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 DESCR IPTION (HC7 244)
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
2/12
IEC LOGIC SYMBOLS
TRUTH TABLE
M54/M74HC7240/7241/7244
HC7244HC724 1HC7240
INPUT OUTPUT
G G (HC7241) An Yn (HC7240) Yn (HC7241) Yn (HC7244)
LHLHLL
LHHLHH
X: ”H” or ”L”
Z: Highimpedance
HLXZZZ
CIRCUIT SCHEMATIC (1/8 PACKAGE)
HC724 0 HC7244
3/12
M54/M74HC7240/7241/7244
ABSOLU TE MAXI MU 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
AbsoluteMaximumRatingsarethose values beyond whichdamage tothedevicemayoccur. Functional operation under these condition isnotimplied.
(*)500 mW:≅ 65oC derate to300 mW by 10mW/oC: 65oCto85oC
RECO MM ENDED OPERAT IN G CO NDITIONS
Symbol Parameter Value Unit
V
CC
V
I
V
O
T
op
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 (10sec) 300
L
Supply Voltage 2 to 6 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
o
C
o
C
V
V
o
C
o
C
4/12
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