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Unisonic Technologies |
UNISONIC TECHNOLOGIES CO., LTD
U74HC138
3-TO-8 LINE DECODERS /
DEMULTIPLEXERS
DESCRIPTION
The U74HC138 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.
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.
FEATURES
* Operate from 2.0V ~ 6.0V
* Low Input Current: 100nA Max
* Low Quiescent Current: 8μA Max
* Typ tPD=15ns
* Output Drive:4mA @ 5V
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74HC138L-D16-T
U74HC138G-D16-T
U74HC138L-S16-T
U74HC138G-S16-T
U74HC138L-S16-R
U74HC138G-S16-R
U74HC138L-R16-T
U74HC138G-R16-T
U74HC138L-R16-R
U74HC138G-R16-R
U74HC138L-P16-T
U74HC138G-P16-T
U74HC138L-P16-R
U74HC138G-P16-R
Package
DIP-16
SOP-16
SOP-16
SSOP-16
SSOP-16
TSSOP-16
TSSOP-16
CMOS IC
DIP-16
SOP-16
SSOP-16
TSSOP-16
Packing
Tube
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-614.E
http://www.Datasheet4U.com
U74HC138
PIN CONFIGURATION
A0 1
A1 2
A2 3
E1 4
E2 5
E3 6
Y7
GND
7
8
16 VCC
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9 Y6
CMOS IC
FUNCTION TABLE
INPUTS
OUTPUTS
E1 E2 E3 A0 A1 A2 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
HXXXXXHHHHHHHH
XHXXXXHHHHHHHH
XXL XXXHHHHHHHH
L LHL L L LHHHHHHH
L LHHL LHLHHHHHH
L LHLHLHHLHHHHH
L LHHHLHHHLHHHH
L LHL LHHHHHLHHH
L LHHLHHHHHHLHH
L LHLHHHHHHHHLH
L LHHHHHHHHHHHL
Note: H: High voltage level
L: Low voltage level
X: Don’t care
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R502-614.E
http://www.Datasheet4U.com
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