ZHCSQ55H April 2004 – March 2022 SN54HC148 , SN74HC148
PRODUCTION DATA
请参考 PDF 数据表获取器件具体的封装图。
The ’HC148 devices feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. These devices encode eight data lines to 3-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion without the need for external circuitry. Data inputs and outputs are active at the low logic level.