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参数资料
| 型号： | SN74LS147D |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 算术逻辑单元 |
| 英文描述： | LS SERIES, 9-BIT ENCODER, PDSO16 |
| 文件页数： | 9/10页 |
| 文件大小： | 336K |
| 代理商： | SN74LS147D |
Product Folder: SN74LS148, 8-line to 3-line priority encoder
PRODUCT SUPPORT: TRAINING
SN74LS148, 8-line to 3-line priority encoder
DEVICE STATUS: ACTIVE
PARAMETER NAME SN54LS148 SN74LS148
Voltage Nodes (V) 5
5
Vcc range (V)
4.5 to 5.5
4.75 to 5.25
Input Level
TTL
Output Level
TTL
Output Drive (mA)
-0.4/8
Output
2S
From
8
To
3
FEATURES
q
'147, 'LS147
r
Encodes 10-Line Decimal to 4-Line BCD
r
Applications Include:
- Keyboard Encoding
- Range Selection
q
'148, 'LS148
r
Encodes 8 Data Lines to 3-Line Binary (Octal)
r
Applications Include:
- N-Bit Encoding
- Code Converters and Generators
DESCRIPTION
These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The '147 and 'LS147 encode nine data lines to four-line (8-4-2-1) BCD. The
implied decimal zero condition requires no input condition as zero is encoded when all nine data lines are at a high logic level. The '148 and 'LS148 encode eight data lines to three-line (4-2-1)
binary (octal). Cascading circuitry (enable input E1 and enable output E0) has been provided to allow octal expansion without the need for external circuitry. For all types, data inputs and outputs
are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54LS/74LS load, respectively.
TECHNICAL DOCUMENTS
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DATASHEET
APPLICATION NOTES
View Application Notes for Digital Logic
file:///H|/imaging/BITTING/cpl/20020930_1/09272002_10/TXII/09272002_HTML/sn74ls148.html (1 of 3) [Oct-04-2002 5:43:56 PM]
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS148D | 功能描述:编码器、解码器、复用器和解复用器 8 to 3 Priority RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS148DE4 | 功能描述:编码器、解码器、复用器和解复用器 8-line to 3-line Priority encoder RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS148DG4 | 功能描述:编码器、解码器、复用器和解复用器 8 Ln to 3 Ln Priority Encoder RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS148DR | 功能描述:编码器、解码器、复用器和解复用器 8 to 3 Priority RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| SN74LS148DR2 | 制造商:ON Semiconductor 功能描述:Encoder 8-to-3 Priority Bipolar 16-Pin SOIC T/R |
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