M74HCT240M1R [STMICROELECTRONICS]
OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT240: INVERTED - HCT241/244 NON INVERTED; 具有三态八路总线缓冲器输出HCT240 ：反转 - HCT241 / 244非反相
| 型号： | M74HCT240M1R |
| 厂家： | 
ST |
| 描述： | OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT240: INVERTED - HCT241/244 NON INVERTED |
| 文件： | 总12页 (文件大小：264K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54HCT240/241/244
M74HCT240/241/244
OCTAL BUS BUFFER WITH 3 STATE OUTPUTS
HCT240: INVERTED - HCT241/244 NON INVERTED
.
.
.
.
.
.
.
HIGH SPEED
PD = 13 ns (TYP.) at VCC = 5V
t
LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 oC
COMPATIBLE WITH TTL OUTPUTS
V
IH = 2V (MIN.) VIL = 0.8V (MAX)
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 6 mA (MIN)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS240/241/244
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCTXXXF1R
M74HCTXXXM1R
M74HCTXXXB1R
M74HCTXXXC1R
DESCRIPTION
The M54/74HCT240, HCT241 and HCT244 are
high speed CMOS OCTAL BUS BUFFERs
fabricated in silicon gate 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 of inverting and non-inverting outputs,
symmetrical G (active low output control) input, and
complementary G and G inputs. Each control input
governs four BUS BUFFERs.
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.
These devices are designed to be used with 3 state
memory address drivers, etc.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
This integrated circuit has input and output
PIN CONNECTION (top view)
HCT240
HCT241
HCT244
September 1993
1/12
M54/M74HCT240/241/244
CHIP CARRIER
HCT240
HCT241
HCT244
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION (HCT240)
PIN No
1
SYMBOL
NAME AND FUNCTION
1G
Output Enable Input
2, 4, 6, 8
9, 7, 5, 3
1A1 to 1A4 Data Inputs
2Y1 to 2Y4 Data Outputs
11, 13, 15, 2A1 to 2A4 Data Inputs
17
18, 16, 14, 1Y1 to 1Y4 Data Outputs
12
19
10
20
2G
GND
VCC
Output Enabel Input
Ground (0V)
Positive Supply Voltage
PIN DESCRIPTION (HCT241)
PIN DESCRIPTION (HCT244)
PIN No
1
SYMBOL
NAME AND FUNCTION
PIN No
1
SYMBOL
NAME AND FUNCTION
1G
Output Enable Input
1G
Output Enable Input
2, 4, 6, 8
9, 7, 5, 3
1A1 to 1A4 Data Inputs
2Y1 to 2Y4 Data Outputs
2, 4, 6, 8
9, 7, 5, 3
1A1 to 1A4 Data Inputs
2Y1 to 2Y4 Data Outputs
11, 13, 15, 2A1 to 2A4 Data Inputs
17
11, 13, 15, 2A1 to 2A4 Data Inputs
17
18, 16, 14, 1Y1 to 1Y4 Data Outputs
12
18, 16, 14, 1Y1 to 1Y4 Data Outputs
12
19
10
20
2G
GND
VCC
Output Enabel Input
Ground (0V)
19
10
20
2G
GND
VCC
Output Enabel Input
Ground (0V)
Positive Supply Voltage
Positive Supply Voltage
2/12
M54/M74HCT240/241/244
IEC LOGIC SYMBOLS
HCT240
HCT241
HCT244
TRUTH TABLE
INPUT
OUTPUT
G
L
G (HCT241)
An
L
Yn (HCT240)
Yn (HCT241)
Yn (HCT244)
H
H
L
H
L
L
H
Z
L
H
Z
L
H
H
X
Z
X: ”H” or ”L”
Z: High impedance
CIRCUIT SCHEMATIC (1/8 PACKAGE)
HCT240
HCT241/244
3/12
M54/M74HCT240/241/244
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Parameter
Value
-0.5 to +7
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
Unit
V
Supply Voltage
DC Input Voltage
V
VO
DC Output Voltage
V
IIK
DC Input Diode Current
DC Output Diode Current
DC Output Source Sink Current Per Output Pin
mA
mA
mA
mA
mW
oC
IOK
± 20
IO
± 35
ICC or IGND DC VCC or Ground Current
± 70
PD
Tstg
TL
Power Dissipation
500 (*)
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
oC
Absolute MaximumRatingsare those values beyond whichdamage tothe device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
Parameter
Value
4.5 to 5.5
0 to VCC
0 to VCC
Unit
V
Supply Voltage
Input Voltage
Output Voltage
V
VO
V
Top
Operating Temperature: M54HC Series
M74HC Series
-55 to +125
-40 to +85
oC
oC
tr, tf
Input Rise and Fall Time (VCC = 4.5 to 5.5V)
0 to 500
ns
4/12
M54/M74HCT240/241/244
DC SPECIFICATIONS
Test Conditions
VCC
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
TA = 25 oC
54HC and 74HC
Symbol
VIH
Parameter
Unit
V
(V)
Min. Typ. Max. Min. Max. Min. Max.
High Level Input
Voltage
4.5
to
2.0
2.0
2.0
5.5
VIL
Low Level Input
Voltage
4.5
to
0.8
0.8
0.8
V
5.5
VOH
High Level
VI = IO=-20 µA
4.4
4.5
4.4
4.4
Output Voltage
VIH
or
VIL
4.5
V
V
IO=-6.0 mA 4.18 4.31
4.13
4.10
VOL
Low Level Output
Voltage
VI = IO= 20 µA
VIH
or
VIL
0.0
0.1
0.1
0.33
±1
0.1
0.4
±1
4.5
5.5
IO= 6.0 mA
0.17 0.26
II
Input Leakage
Current
VI = VCC or GND
±0.1
4
µA
µA
ICC
Quiescent Supply 5.5 VI = VCC or GND
Current
40
80
∆ICC
Additional worst
case supply
current
5.5
Per Input pin
VI = 0.5V or 2.4V
Other Inputs at
VCC or GND
2.0
2.9
3.0
mA
5/12
M54/M74HCT240/241/244
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
Value
TA = 25 oC
54HC and 74HC
-40 to 85 oC -55 to 125 oC
Symbol
Parameter
Unit
VCC CL
(V) (pF)
74HC
54HC
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
tPLH
tPHL
Output Transition
Time
4.5
50
7
12
15
18
ns
Propagation
Delay Time
4.5
50
15
21
15
21
17
23
16
22
30
25
33
30
38
30
28
38
31
41
38
48
38
33
45
38
50
45
57
45
ns
ns
ns
ns
ns
ns
ns
4.5 150
4.5 50
4.5 150
tPLH
tPHL
Propagation
Delay Time
tPZL
tPZH
Output Enable
Time
4.5
50 RL = 1KΩ
4.5 150 RL = 1KΩ
tPLZ
tPHZ
Output Disable
Time
4.5
50 RL = 1KΩ
CIN
Input Capacitance
5
10
10
10
pF
pF
COUT
Output
10
Capacitance
CPD (*) Power Dissipation
Capacitance
HCT240
HCT241/244
33
31
pF
(*) CPD isdefined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the followingequation. ICC(opr) = CPD • VCC • fIN + ICC/8 (per circuit)
TEST CIRCUIT ICC (Opr.)
HCT240
6/12
M54/M74HCT240/241/244
SWITCHING CHARACTERISTICS TEST WAVEFORM
7/12
M54/M74HCT240/241/244
Plastic DIP20 (0.25) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
0.254
1.39
TYP.
MAX.
MIN.
0.010
0.055
MAX.
a1
B
b
1.65
0.065
0.45
0.25
0.018
0.010
b1
D
E
e
25.4
1.000
8.5
2.54
22.86
0.335
0.100
0.900
e3
F
7.1
0.280
0.155
I
3.93
L
3.3
0.130
Z
1.34
0.053
P001J
8/12
M54/M74HCT240/241/244
Ceramic DIP20 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
25
MIN.
MAX.
0.984
0.307
A
B
7.8
D
E
3.3
0.130
0.900
0.5
1.78
0.020
0.070
e3
F
22.86
2.29
0.4
2.79
0.55
1.52
0.31
1.27
0.090
0.016
0.050
0.009
0.020
0.110
0.022
0.060
0.012
0.050
G
I
1.27
0.22
0.51
L
M
N1
P
4° (min.), 15° (max.)
7.9
8.13
5.71
0.311
0.320
0.225
Q
P057H
9/12
M54/M74HCT240/241/244
SO20 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
2.65
0.20
2.45
0.49
0.32
MIN.
MAX.
0.104
0.007
0.096
0.019
0.012
A
a1
a2
b
0.10
0.004
0.35
0.23
0.013
0.009
b1
C
0.50
0.020
c1
D
45° (typ.)
12.60
10.00
13.00
10.65
0.496
0.393
0.512
0.419
E
e
1.27
0.050
0.450
e3
F
11.43
7.40
0.50
7.60
1.27
0.75
0.291
0.19
0.299
0.050
0.029
L
M
S
8° (max.)
P013L
10/12
M54/M74HCT240/241/244
PLCC20 MECHANICAL DATA
mm
inch
DIM.
MIN.
9.78
8.89
4.2
TYP.
MAX.
10.03
9.04
MIN.
0.385
0.350
0.165
TYP.
MAX.
0.395
0.356
0.180
A
B
D
4.57
d1
d2
E
2.54
0.56
0.100
0.022
7.37
8.38
0.290
0.330
0.004
e
1.27
5.08
0.38
0.050
0.200
0.015
e3
F
G
0.101
M
M1
1.27
1.14
0.050
0.045
P027A
11/12
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 for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsin life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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12/12
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