Logic IC (Logic Integrated Circuit) 内部由海量的晶体管组成精密的“电子开关网络”。这些开关根据预设的规则（真值表）导通或闭合，接收到输入的电平信号后，立刻输出对应的结果，以此实现加法、比较、判断等功能。逻辑芯片是半导体产业中市场规模最大的一类，2025年全球销售额已达到3019亿美元。
| 型号 | 品牌 | Pin2PIN | 参数 | 封装 |
|---|---|---|---|---|
| EM74HC368PW | ENERGYMATH | 74HC368PW, SN74HC368PW, | Hex inverter/line driver (3-state) | TSSOP16L |
| EM74HC368D | ENERGYMATH | 74HC368D, SN74HC368D, | Hex inverter/line driver (3-state) | SOP-16L |
| EM74HC367PW | ENERGYMATH | 74HC367PW, SN74HC367PW, | Hex buffer/line driver; 3-state | TSSOP16L |
| EM74HC367D | ENERGYMATH | 74HC367D, SN74HC367D, | Hex buffer/line driver; 3-state | SOP-16L |
| EM74HC366PW | ENERGYMATH | 74HC366PW | Hex inverter/line driver (3-state) | TSSOP16L |
| EM74HC366D | ENERGYMATH | 74HC366D, SN74HC366D, | Hex inverter/line driver (3-state) | SOP-16L |
| EM74HC365PW | ENERGYMATH | 74HC365PW, SN74HC365PW, | Hex buffer/line driver; 3-state | TSSOP16L |
| EM74HC365D | ENERGYMATH | 74HC365D, SN74HC365D, | Hex buffer/line driver; 3-state | SOP-16L |
| EM74HC32PW | ENERGYMATH | 74HC32PW, SN74HC32PW, | Quad 2-input OR gate | TSSOP14L |
| EM74HC32D | ENERGYMATH | 74HC32D, SN74HC32D, | Quad 2-input OR gate | SOP-14L |
| EM74HC27PW | ENERGYMATH | 74HC27PW, SN74HC27PW, | Triple 3-input NOR gate | TSSOP14L |
| EM74HC27D | ENERGYMATH | 74HC27D, SN74HC27D, | Triple 3-input NOR gate | SOP-14L |
| EM74HC266PW | ENERGYMATH | Quad 2-Input XNOR Gates with Open-Drain Outputs | TSSOP14L | |
| EM74HC266D | ENERGYMATH | SN74HC266D, | Quad 2-Input XNOR Gates with Open-Drain Outputs | SOP-14L |
| EM74HC259PW | ENERGYMATH | 74HC259PW, SN74HC259PW, | 8-bit addressable latch | TSSOP16L |
| EM74HC259D | ENERGYMATH | 74HC259D, SN74HC259D, | 8-bit addressable latch | SOP-16L |
| EM74HC245PW | ENERGYMATH | 74HC245PW, SN74HC245PW, | Octal bus transceiver; 3-state | TSSOP20L |
| EM74HC245D | ENERGYMATH | 74HC245D, SN74HC245DW, | Octal bus transceiver; 3-state | SOP-20L |
| EM74HC244PW | ENERGYMATH | 74HC244PW, SN74HC244PW, | Octal buffer/line driver; 3-state | TSSOP20L |
| EM74HC244D | ENERGYMATH | 74HC244D, SN74HC244DW, | Octal buffer/line driver; 3-state | SOP-20L |