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參數(shù)資料
| 型號： | 74VHC139T |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DUAL 2 TO 4 DECODER/DEMULTIPLEXER |
| 中文描述： | 雙2至4譯碼器/解復(fù)用器 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 73K |
| 代理商： | 74VHC139T |
www.fairchildsemi.com
2
74
V
HC139
Logic Symbols
IEEE/IEC
Functional Description
The VHC139 is a high-speed dual 2-to-4 decoder/demulti-
plexer. The device has two independent decoders, each of
which accepts two binary weighted inputs (A0–A1) and pro-
vides four mutually exclusive active-LOW outputs (O0–O3).
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 VHC139 generates all four minterms of
two variables. These four minterms are useful in some
applications, replacing multiple gate functions as shown in
Figure 1, and thereby reducing the number of packages
required in a logic network.
FIGURE 1. Gate Functions (Each Half)
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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參數(shù)描述 |
|---|---|
| 74VHC139TTR | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dual 2-to-4 Decoder 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 |
| 74VHC14 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HEX SCHMITT inverter |
| 74VHC14_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HEX SCHMITT inverter |
| 74VHC14_10 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:74VHC14 Hex Schmitt Inverter |
| 74VHC14_99 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Hex Schmitt Inverter |
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