U74HC240G-P20-T [UTC]
Bus Driver, HC/UH Series, 2-Func, 4-Bit, Inverted Output, CMOS, PDSO20, HALOGEN FREE, TSSOP-20;
| 型号： | U74HC240G-P20-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | Bus Driver, HC/UH Series, 2-Func, 4-Bit, Inverted Output, CMOS, PDSO20, HALOGEN FREE, TSSOP-20 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总7页 (文件大小：175K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
U74HC240
CMOS IC
OCTAL BUFFERS AND LINE
DRIVERS WITH 3-STATE OUTPUTS
DESCRIPTION
The U74HC240 is a octal buffer and line driver with 3-state outputs.
It is organized as two 4-bit buffers/drivers with separate
output-enable ( OE ) inputs. When OE is high, the Y outputs are
in a high-impedance state and the outputs neither load nor drive
the bus lines. When OE is low, the device passes inverted data
from the A inputs to the Y outputs.
The U74HC240 is designed to improve the performance and
density of 3-state memory address drivers, clock drivers and
bus-oriented receivers and transmitters.
To ensure the high-impedance state during power up or power
down, OE should be tied to VCC through a pull-up resistor; and
the minimum value of the resistor is determined by the
current-sinking capability of the driver.
FEATURES
* Wide supply voltage range from 2V to 6V
* Max tpd of 9 ns from A to Y at 6V
* Low power consumption, ICC = 8 μA (Max.) at 6V
* ±6 mA output driver at 5V
* Low Input Current of 1 μA Max
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
U74HC240L-P20-R
U74HC240L-P20-T
U74HC240G-P20-R
U74HC240G-P20-T
TSSOP-20
TSSOP-20
Tape Reel
Tube
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Copyright © 2010 Unisonic Technologies Co., Ltd
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U74HC240
CMOS IC
PIN CONFIGURATION
VCC
19 2OE
1
2
20
1OE
1A1
2Y4
18
17
16
15
14
13
12
11
3
1Y1
2A4
1Y2
4
1A2
2Y3
5
2A3
1Y3
2A2
1Y4
2A1
6
1A3
2Y2
7
8
1A4
2Y1
9
10
GND
FUNCTION TABLE (each buffer)
INPUTS
OUTPUT
Y
OE
A
L
L
H
H
L
X
L
H
Z
LOGIC DIAGRAM (positive logic)
1
19
11
1OE
2OE
2A1
18
16
14
12
9
2
4
6
8
1A1
1A2
1A3
1A4
1Y1
2Y1
7
13
15
17
1Y2 2A2
1Y3 2A3
1Y4 2A4
2Y2
5
2Y3
3
2Y4
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U74HC240
CMOS IC
ABSOLUTE MAXIMUM RATING (unless otherwise specified)
PARAMETER
SYMBOL
VCC
RATINGS
-0.5 ~ 7
±20
UNIT
V
Supply Voltage
Input Clamp Current (VIN<0, or VIN>VCC
)
IIK
mA
mA
mA
mA
°C
Output Clamp Current (VOUT<0, or VOUT>VCC
)
IOK
±20
Output Current
IOUT
ICC
±35
VCC or GND Current
±70
Storage Temperature
TSTG
-65 ~ +150
Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING COMDITIONS
PARAMETER
SYMBOL
CONDITIONS
MIN
2
TYP
MAX
UNIT
Supply Voltage
VCC
5
6
V
VCC = 2V
1.5
3.15
4.2
High-Level Input Voltage
VIH
VIL
V
V
VCC = 4.5V
VCC = 6V
VCC = 2V
VCC = 4.5V
VCC = 6V
0.5
1.35
1.8
Low-Level Input Voltage
Input Voltage
VIN
0
0
VCC
VCC
1000
500
400
85
V
V
Output Voltage
VOUT
VCC = 2V
Input Transition Rise or Fall
Rate
Δt/Δv
ns/V
°C
VCC = 4.5V
VCC = 6V
Operating Temperature
TA
-40
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U74HC240
CMOS IC
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
IOH = -20 μA, VCC = 2V
IOH = -20 μA, VCC = 4.5V
IOH = -20 μA, VCC = 6V
IOH = -6 mA, VCC = 4.5V
IOH = -7.8 mA, VCC = 6V
IOL = 20 μA, VCC = 2V
IOL = 20 μA, VCC = 4.5V
IOL = 20 μA, VCC = 6V
IOL = 6 mA, VCC = 4.5V
MIN
1.9
TYP(1) MAX UNIT
1.998
4.499
4.4
High-Level Output Voltage
Low-Level Output Voltage
VOH
V
V
5.9
5.999
4.3
3.98
5.48
5.8
0.002
0.001
0.001
0.17
0.15
0.1
0.1
VOL
0.1
0.26
0.26
I
OL = 7.8 mA, VCC = 6V
VIN = VCC or GND,
CC = 6V
VO = VCC or GND, VCC = 6V
I(OE) = VIL or VIH
VIN = VCC or GND,
OUT = 0, VCC = 6V
VIN = VCC or GND,
CC = 2V to 6V
Input Leakage Current
(A or OE inputs)
II(LEAK)
IOZ
±0.1
±100
±0.5
8
μA
μA
μA
pF
V
High-impedance state Current
Quiescent Supply Current
Input Capacitance
±0.01
V
ICC
I
CIN
3
10
V
SWITCHING CHARACTERISTICS (TA =25°C)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VCC=2V, CL=50pF, RL=1kΩ
VCC=4.5V, CL=50pF, RL=1kΩ
VCC=6V, CL=50pF, RL=1kΩ
VCC=2V, CL=150pF, RL=1kΩ
VCC=4.5V, CL=150pF, RL=1kΩ
VCC=6V, CL=150pF, RL=1kΩ
VCC=2V, CL=50pF, RL=1kΩ
VCC=4.5V, CL=50pF, RL=1kΩ
VCC=6V, CL=50pF, RL=1kΩ
VCC=2V, CL=150pF, RL=1kΩ
VCC=4.5V, CL=150pF, RL=1kΩ
VCC=6V, CL=150pF, RL=1kΩ
VCC=2V, CL=50pF, RL=1kΩ
VCC=4.5V, CL=50pF, RL=1kΩ
VCC=6V, CL=50pF, RL=1kΩ
VCC=2V, CL=50pF, RL=1kΩ
VCC=4.5V, CL=50pF, RL=1kΩ
VCC=6V, CL=50pF, RL=1kΩ
VCC=2V, CL=150pF, RL=1kΩ
VCC=4.5V, CL=150pF, RL=1kΩ
VCC=6V, CL=150pF, RL=1kΩ
50
10
9
100
20
ns
ns
ns
ns
ns
ns
ns
Propagation delay from input A to
output Y, tpd
17
tPLH / tPHL
75
15
13
75
15
13
100
20
17
44
22
21
28
8
150
30
26
150
30
Propagation delay from input OE
to output Y, ten
26
tPZH / tPZL
tPHZ / tPLZ
tr / tf
200
40
34
150
30
Propagation delay from input OE
to output Y, tdis
26
60
12
6
10
Propagation of rise or fall, tt
45
17
13
210
42
36
OPERATING CHARACTERISTICS (TA =25°C)
PARAMETER
Power dissipation capacitance per buffer/driver
SYMBOL
TEST CONDITIONS
TYP UNIT
Cpd
No load
35
pF
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U74HC240
CMOS IC
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U74HC240
CMOS IC
TEST CIRCUIT AND WAVEFORMS
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
GND
Inputs
VM
VLOAD
CL
RL
VIN
tr, tf
VCC
≤ 6ns
VCC/2
VCC
50 or 150pF
500Ω
VCC
90%
90%
Input
10%
10%
0V
tr
tf
VOLTAGE WAVEFORMS
INPUT RISE AND FALL TIMES
V
IN
VM
Input
VM
0V
tPHL
tPLH
VOH
90%
VM
90%
Output
VM
10%
10%
VOL
tr
tf
tPLH
tPHL
VOH
90%
90%
VM
Output
VM
10%
10%
VOL
tr
tf
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
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U74HC240
CMOS IC
V
IN
Input
VM
VM
0V
tPLZ
tPZL
VLOAD
Output
VM
S1at VLOAD
10%
90%
V
OL
tPZH
tPHZ
VOH
Output
S1 at GND
VM
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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