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?? HC148器件具有输入的优先级解码功能，可确保只编码最高阶数据线。这些器件将8条数据线编码为3线（4-2-1）二进制（八进制）。提供级联电路（使能输入EI和使能输出EO）以允许八进制扩展而无需外部电路。数据输入和输出在低逻辑电平下有效。
| Function |
| Technology Family |
| VCC (Min) (V) |
| VCC (Max) (V) |
| Channels (#) |
| Voltage (Nom) (V) |
| F @ Nom Voltage (Max) (Mhz) |
| ICC @ Nom Voltage (Max) (mA) |
| tpd @ Nom Voltage (Max) (ns) |
| Configuration |
| Type |
| IOL (Max) (mA) |
| IOH (Max) (mA) |
| Rating |
| Operating Temperature Range (C) |
| Package Group |
| Package Size: mm2:W x L (PKG) |
| Bits (#) |
| Digital input leakage (Max) (uA) |
| ESD Charged Device Model (kV) |
| ESD HBM (kV) |
| SN74HC148 | SN54HC148 |
|---|---|
| Encoder Multiplexer | Encoder/Multiplexer |
| HC | HC |
| 2 | 2 |
| 6 | 6 |
| 1 | 1 |
| 3.3 5 | 3.3 5 |
| 28 | 28 |
| 0.08 | 0.08 |
| 49 | 49 |
| 8:3 | 8:3 |
| Standard | Standard |
| 5.2 | 5.2/-5.2 |
| -5.2 | |
| Catalog | Military |
| -40 to 85 | -55 to 125 |
| PDIP SO SOIC | CDIP LCCC |
| See datasheet (PDIP) 16SO: 80 mm2: 7.8 x 10.2(SO) 16SOIC: 59 mm2: 6 x 9.9(SOIC) | See datasheet (CDIP) 20LCCC: 79 mm2: 8.89 x 8.89(LCCC) |
| 8 | 8 |
| 5 | 5 |
| 0.75 | 0.75 |
| 2 | 2 |
| 无样片 |
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