2024年3月28日发(作者：太叔宛儿)
元器件交易网
TECHNICAL DATA
KK74HCT240A
Octal 3-State Inverting Buffer/Line
Driver/Line Receiver
High-Performance Silicon-Gate CMOS
The KK74HCT240A is identical in pinout to the LS/ALS240. The
KK74HCT240A may be used as a level converter for interfacing TTL or
NMOS outputs to High Speed CMOS inputs.
This octal inverting buffer/line driver/line receiver is designed to be
used with 3-state memory address drivers, clock drivers, and other bus-
oriented systems. The device has inverting outputs and two active-low
output enables.
ORDERING INFORMATION
• TTL/NMOS Compatible Input Levels
KK74HCT240AN P lastic
• Outputs Directly Interface to CMOS, NMOS, and TTL
KK74HCT240ADW SOIC
• Operating Voltage Range: 4.5 to 5.5 V
T
A
= -55° to 125° C for all packages
• Low Input Current: 1.0 µA
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs Outputs
PIN 20=V
CC
PIN 10 = GND
Enable A,
Enable B
A,B YA,YB
L L H
L H L
H X Z
X = don’t care
Z = high impedance
1
元器件交易网
KK74HCT240A
MAXIMUM RATINGS
*
Symbol Parameter
V
CC
V
IN
V
OUT
I
IN
I
OUT
I
CC
P
D
Tstg
T
L
*
Value Unit
-0.5 to +7.0
-1.5 to V
CC
+1.5
-0.5 to V
CC
+0.5
±20
±35
±75
750
500
-65 to +150
260
V
V
V
mA
mA
mA
mW
°C
°C
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Current, per Pin
DC Supply Current, V
CC
and GND Pins
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V
CC
V
IN
, V
OUT
T
A
t
r
, t
f
This device contains protection circuitry to guard against damage due to high static voltages or electric fields.
However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this
high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range GND≤(V
IN
or
V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
). Unused
outputs must be left open.
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Operating Temperature, All Package Types
Input Rise and Fall Time (Figure 1)
4.5
0
-55
0
5.5
V
CC
+125
500
V
V
°C
ns
2
2024年3月28日发(作者：太叔宛儿)
元器件交易网
TECHNICAL DATA
KK74HCT240A
Octal 3-State Inverting Buffer/Line
Driver/Line Receiver
High-Performance Silicon-Gate CMOS
The KK74HCT240A is identical in pinout to the LS/ALS240. The
KK74HCT240A may be used as a level converter for interfacing TTL or
NMOS outputs to High Speed CMOS inputs.
This octal inverting buffer/line driver/line receiver is designed to be
used with 3-state memory address drivers, clock drivers, and other bus-
oriented systems. The device has inverting outputs and two active-low
output enables.
ORDERING INFORMATION
• TTL/NMOS Compatible Input Levels
KK74HCT240AN P lastic
• Outputs Directly Interface to CMOS, NMOS, and TTL
KK74HCT240ADW SOIC
• Operating Voltage Range: 4.5 to 5.5 V
T
A
= -55° to 125° C for all packages
• Low Input Current: 1.0 µA
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs Outputs
PIN 20=V
CC
PIN 10 = GND
Enable A,
Enable B
A,B YA,YB
L L H
L H L
H X Z
X = don’t care
Z = high impedance
1
元器件交易网
KK74HCT240A
MAXIMUM RATINGS
*
Symbol Parameter
V
CC
V
IN
V
OUT
I
IN
I
OUT
I
CC
P
D
Tstg
T
L
*
Value Unit
-0.5 to +7.0
-1.5 to V
CC
+1.5
-0.5 to V
CC
+0.5
±20
±35
±75
750
500
-65 to +150
260
V
V
V
mA
mA
mA
mW
°C
°C
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Current, per Pin
DC Supply Current, V
CC
and GND Pins
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V
CC
V
IN
, V
OUT
T
A
t
r
, t
f
This device contains protection circuitry to guard against damage due to high static voltages or electric fields.
However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this
high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range GND≤(V
IN
or
V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
). Unused
outputs must be left open.
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Operating Temperature, All Package Types
Input Rise and Fall Time (Figure 1)
4.5
0
-55
0
5.5
V
CC
+125
500
V
V
°C
ns
2