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參數資料
| 型號： | MC74AC139N |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | DUAL 1-OF-4 DECODER/DEMULTIPLEXER |
| 中文描述： | AC SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數： | 2/12頁 |
| 文件大小： | 108K |
| 代理商： | MC74AC139N |
MC74AC139, MC74ACT139
http://onsemi.com
2
E
A
0
A
1
O
0
O
1
O
2
O
3
DECODER a
Figure 2. Logic Symbol
E
A
0
A
1
O
0
O
1
O
2
O
3
DECODER b
E
a
A
0a
A
1a
E
b
A
0b
A
1b
0
0a
0
1a
0
2a
0
3a
0
0b
0
1b
0
2b
0
3b
NOTE:
This diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation
delays.
Figure 3. Logic Diagram
FUNCTIONAL DESCRIPTION
The MC74AC139/74ACT139 is a high–speed dual
1–of–4 decoder/demultiplexer. The device has two
independent decoders, each of which accepts two binary
weighted inputs (A
0
–A
1
) and provides four mutually
exclusive active–LOW outputs (O
0
–O
3
). Each decoder has
an active–LOW enable (E). When E is HIGH all outputs are
forced HIGH. The enable can be used as the data input for
a 4–output demultiplexer application. Each half of the
MC74AC139/74ACT139 generates all four minterms of
two variables. These four minterms are useful in some
applications, replacing multiple gate functions as shown in
Figure 4, and thereby reducing the number of packages
required in a logic network.
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
E
A
0
A
1
O
0
O
0
O
1
O
1
O
2
O
2
O
3
O
3
Figure 4. Gate Functions (Each Half)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC74AC139NG | 功能描述:編碼器、解碼器、復用器和解復用器 2-6V Dual 1-of-13 Decoder/DeMux RoHS:否 制造商:Micrel 產品:Multiplexers 邏輯系列:CMOS 位數: 線路數量（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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| MC74AC14 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:HEX INVERTER SCHMITT HEX INVERTER SCHMITT TRIGGER |
| MC74AC14_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Hex Inverter Schmitt Trigger |
| MC74AC14D | 功能描述:變換器 2-6V CMOS Hex RoHS:否 制造商:NXP Semiconductors 電路數量:6 邏輯系列:74ABT 邏輯類型:BiCMOS 高電平輸出電流:- 15 mA 低電平輸出電流:20 mA 傳播延遲時間:2.2 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 工作溫度范圍: 封裝 / 箱體:DIP-14 封裝:Tube |
| MC74AC14DG | 功能描述:變換器 2-6V CMOS Hex Schmitt Trigger RoHS:否 制造商:NXP Semiconductors 電路數量:6 邏輯系列:74ABT 邏輯類型:BiCMOS 高電平輸出電流:- 15 mA 低電平輸出電流:20 mA 傳播延遲時間:2.2 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 工作溫度范圍: 封裝 / 箱體:DIP-14 封裝:Tube |
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