U74HCT138G-R16-R [UTC]
3-TO-8 LINE DECODERS DEMULTIPLEXERS;
| 型号： | U74HCT138G-R16-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | 3-TO-8 LINE DECODERS DEMULTIPLEXERS 光电二极管 逻辑集成电路 |
| 文件： | 总5页 (文件大小：222K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
U74HCT138
CMOS IC
3-TO-8 LINE DECODERS /
DEMULTIPLEXERS
SOP-16
DESCRIPTION
The U74HCT138 decodes a three−bit Address to 1−of−8
active−low outputs.
This device features three Chip Select inputs, two active−low and
one active−high, to facilitate the demultiplexing, cascading and
chip−selecting functions.
SSOP-16
The demultiplexing function is accomplished by using the
Address inputs to select the desired device output. One of the Chip
Selects is used as a data input while the other Chip Selects are held
in their active states.
TSSOP-16
FEATURES
* Operate from 4.5V to 5.5V
* Low Input Current:1.0uA Max
* Low Power Consumption: 8μA Max
* Typical tPD=15ns
* Inputs are TTL voltage compatible
ORDERING INFORMATION
Ordering Number
Lead Free
Package
Packing
Halogen Free
U74HCT138L-S16-T
U74HCT138L-S16-R
U74HCT138L-R16-T
U74HCT138L-R16-R
U74HCT138L-P16-T
U74HCT138L-P16-R
U74HCT138G-S16-T
U74HCT138G-S16-R
U74HCT138G-R16-T
U74HCT138G-R16-R
U74HCT138G-P16-T
U74HCT138G-P16-R
SOP-16
SOP-16
Tube
Tape Reel
Tube
SSOP-16
SSOP-16
TSSOP-16
TSSOP-16
Tape Reel
Tube
Tape Reel
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Copyright © 2014 Unisonic Technologies Co., Ltd
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U74HCT138
CMOS IC
PIN CONFIGURATION
VCC
Y0
A0
A1
A2
E1
E2
1
2
3
4
5
16
15
14
Y1
13 Y2
Y3
Y4
Y5
Y6
12
11
E3
Y7
6
7
8
10
9
GND
FUNCTION TABLE
INPUTS
OUTPUTS
E3
A0
A1
A2
Y0
H
H
H
L
Y3
H
H
H
H
H
H
L
Y5
H
H
H
H
H
H
H
H
L
Y6
H
H
H
H
H
H
H
H
H
L
E1
E2
X
H
X
L
Y1
H
H
H
H
L
Y2
Y4
H
H
H
H
H
H
H
L
Y7
H
H
H
H
H
H
H
H
H
H
L
H
X
X
L
L
L
L
L
L
L
L
X
X
L
X
X
X
L
X
X
X
L
X
X
X
L
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
L
L
L
H
H
H
H
H
H
H
L
H
H
L
L
H
H
H
H
H
H
X
L
H
L
L
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
L
L
H
H
H
L
H
H
H
H
L
H
H
Note:H : High voltage level
L
: Low voltage level
: Don’t care
UNISONIC TECHNOLOGIES CO., LTD
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U74HCT138
CMOS IC
LOGIC SYMBOL
LOGIC DIAGRAM
E1
Y0
E2
E3
Y1
Y2
Y3
Y4
A0
Y5
Y6
A1
A2
Y7
UNISONIC TECHNOLOGIES CO., LTD
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U74HCT138
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VCC
IIK
RATINGS
-0.5 ~ 7.0
±20
UNIT
V
Supply Voltage
Input Clamp Current(VI<0 or VI>VCC
Output Clamp Current(VO<0 or VO>VCC
)
mA
mA
mA
mA
℃
)
IOK
±20
Continuous Output Current(VO=0 to VCC
)
IO
±25
VCC or GND Current
ICC
±50
Storage Temperature
TSTG
-65 ~ + 150
Note: 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 CONDITIONS
PARAMETER
SYMBOL
VCC
TEST CONDITIONS
Operating
MIN TYP MAX UNIT
Supply Voltage
Input Voltage
Output Voltage
4.5 5.0 5.5
V
V
VIN
0
0
VCC
VCC
+85
500
VOUT
TA
V
Operating Temperature
Input Rise or Fall Times
-40
°C
ns
tR, tF
VCC=4.5V~5.5V
THERMAL CHARACTERISTICS
PARAMETER
SOP-16
SYMBOL
RATINGS
UNIT
°C/W
73
Junction to Ambient
θJA
TSSOP-16
108
ELECTRICAL CHARACTERISTICS(TA=25°C)
PARAMETER
SYMBOL
VIH
TEST CONDITIONS
VCC=4.5V~5.5V
VCC=4.5V~5.5V
CC=4.5V, IOH=-20μA
VCC=4.5V, IOH=-4mA
CC=4.5V, IOL=20μA
MIN TYP MAX UNIT
High-Level input voltage
Low-Lever output voltage
2.0
V
V
V
V
V
V
VIL
0.8
V
4.4 4.499
3.98 4.3
High-Level Output Voltage
Low-Level Output Voltage
VOH
VOL
V
0.001 0.1
0.17 0.26
VCC=4.5V, IOL=4mA
Input Leakage Current
II(LEAK)
ICC
VCC=5.5V, VIN= VCC or GND
±0.1 ±100 nA
Quiescent Supply Current
VCC=5.5V, VIN=VCC or GND, IOUT=0
One input at 0.5V or 2.4V,other
inputs at 0 or Vcc
8
μA
mA
pF
△ICC
Additional Quiescent Supply Current
Input Capacitance
1.4
3
2.4
10
CI
VCC=4.5V~5.5V
SWITCHING CHARACTERISTICS(TA=25°C, see TEST CIRCUIT AND WAVEFORMS)
PARAMETER
SYMBOL
TEST CONDITIONS
VCC =4.5V, CL=50pF
MIN TYP MAX UNIT
Propagation delay from input
23
17
22
18
12
11
36
32
33
30
15
14
ns
ns
ns
ns
ns
ns
tPLH/tPHL
VCC =5.5V, CL=50pF
VCC =4.5V, CL=50pF
VCC =5.5V, CL=50pF
(An) to output( Yn )
Propagation delay from input
(En) to output( Yn )
tPLH/tPHL
tTLH/tTHL
VCC =4.5V, CL=50pF
Output Transition Time
VCC =5.5V, CL=50pF
OPERATING CHARACTERISTICS
PARAMETER
Power Dissipation Capacitance
SYMBOL
CPD
TEST CONDITIONS
MIN TYP MAX UNIT
No load
85
pF
UNISONIC TECHNOLOGIES CO., LTD
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U74HCT138
CMOS IC
TEST CIRCUIT AND WAVEFORMS
Test Circuit
3V
1.3V
1.3V
Input
GND
VOH
tPHL
tPLH
90%
90%
Output
1.3V
10%
1.3V
10%
VOL
tTLH
tTHL
tTLH
tTHL
VOH
90%
1.3V
90%
1.3V
tPHL
Output
10%
10%
VOL
tPLH
Propagation Delay and Output Tansition Times
Note: CL includes probe and jig capacitance.
All input pulses are supplied by generators having the following characteristics: Zo = 50Ω, tR =6ns, tF =6ns.
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.
UNISONIC TECHNOLOGIES CO., LTD
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