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參數(shù)資料
| 型號： | SN74LS138N |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | LOW POWER SCHOTTKY |
| 中文描述： | LS SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 124K |
| 代理商： | SN74LS138N |
SN74LS138
http://onsemi.com
4
FUNCTIONAL DESCRIPTION
The LS138 is a high speed 1-of-8 Decoder/Demultiplexer
fabricated with the low power Schottky barrier diode
process. The decoder accepts three binary weighted inputs
(A
0
, A
1
, A
2
) and when enabled provides eight mutually
exclusive active LOW Outputs (O
0
–O
7
). The LS138
features three Enable inputs, two active LOW (E
1
, E
2
) and
one active HIGH (E
3
). All outputs will be HIGH unless E
1
and E
2
are LOW and E
3
is HIGH. This multiple enable
function allows easy parallel expansion of the device to a
1-of-32 (5 lines to 32 lines) decoder with just four LS138s
and one inverter. (See Figure a.)
The LS138 can be used as an 8-output demultiplexer by
using one of the active LOW Enable inputs as the data input
and the other Enable inputs as strobes. The Enable inputs
which are not used must be permanently tied to their
appropriate active HIGH or active LOW state.
TRUTH TABLE
INPUTS
OUTPUTS
E
1
E
2
E
3
A
0
A
1
A
2
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
H
X
X
L
L
L
L
L
L
L
L
X
H
X
L
L
L
L
L
L
L
L
X
X
L
H
H
H
H
H
H
H
H
X
X
X
L
H
L
H
L
H
L
H
X
X
X
L
L
H
H
L
L
H
H
X
X
X
L
L
L
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
O
0
O
31
A
0
A
1
A
2
A
3
A
4
H
LS04
A
0
A
1
A
2
E
LS138
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
LS138
123
123
123
123
Figure a
LS138
LS138
A
0
A
1
A
2
E
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
A
0
A
1
A
2
E
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
A
0
A
1
A
2
E
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN74LS139 | LOW POWER SCHOTTKY |
| SN74LS139D | LOW POWER SCHOTTKY |
| SN74LS139N | LOW POWER SCHOTTKY |
| SN74LS13D | SCHMITT TRIGGERS DUAL GATE/HEX INVERTER |
| SN74LS13N | SCHMITT TRIGGERS DUAL GATE/HEX INVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LS138N | 制造商:Texas Instruments 功能描述:IC 74LS 74LS138 DIP16 5.25V |
| SN74LS138N | 制造商:Texas Instruments 功能描述:IC 74LS 74LS138 DIP16 5.25V |
| SN74LS138N3 | 制造商:Texas Instruments 功能描述: |
| SN74LS138NE4 | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 3-line to 8-line Decoder/Demltplxr RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| SN74LS138NMOT88 | 制造商:Motorola 功能描述:74LS138N |
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