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 |
|---|---|---|---|---|
| EM74HCT367D | ENERGYMATH | 74HCT367D, SN74HCT367D, | Hex buffer/line driver; 3-state; TTL input | SOP-16L |
| EM74HCT366PW | ENERGYMATH | 74HCT366PW | Hex inverter/line driver (3-state); TTL input | TSSOP16L |
| EM74HCT366D | ENERGYMATH | 74HCT366D, SN74HCT366D, | Hex inverter/line driver (3-state); TTL input | SOP-16L |
| EM74HCT365PW | ENERGYMATH | 74HCT365PW, SN74HCT365PW, | Hex buffer/line driver; 3-state; TTL input | TSSOP16L |
| EM74HCT365D | ENERGYMATH | 74HCT365D, SN74HCT365D, | Hex buffer/line driver; 3-state; TTL input | SOP-16L |
| EM74HCT32PW | ENERGYMATH | 74HCT32PW, SN74HCT32PW, RS4GT32XQ | Quad 2-input OR gate; TTL input | TSSOP14L |
| EM74HCT32D | ENERGYMATH | 74HCT32D, SN74HCT32D, RS4GT32XP | Quad 2-input OR gate; TTL input | SOP-14L |
| EM74HCT27PW | ENERGYMATH | 74HCT27PW, SN74HCT27PW, | Triple 3-input NOR gate; TTL input | TSSOP14L |
| EM74HCT27D | ENERGYMATH | 74HCT27D, SN74HCT27D, | Triple 3-input NOR gate; TTL input | SOP-14L |
| EM74HCT266PW | ENERGYMATH | Quad 2-Input XNOR Gates with Open-Drain Outputs; TTL input | TSSOP14L | |
| EM74HCT266D | ENERGYMATH | SN74HCT266D, | Quad 2-Input XNOR Gates with Open-Drain Outputs; TTL input | SOP-14L |
| EM74HCT259PW | ENERGYMATH | 74HCT259PW, SN74HCT259PW, | 8-bit addressable latch; TTL-enabled | TSSOP16L |
| EM74HCT259D | ENERGYMATH | 74HCT259D, SN74HCT259D, | 8-bit addressable latch; TTL-enabled | SOP-16L |
| EM74HCT245PW | ENERGYMATH | 74HCT245PW, SN74HCT245PW, RS245TXTSS20 | Octal bus transceiver; 3-state; TTL-enabled | TSSOP20L |
| EM74HCT245D | ENERGYMATH | 74HCT245D, SN74HCT245DW, RS245TXS20 | Octal bus transceiver; 3-state; TTL-enabled | SOP-20L |
| EM74HCT244PW | ENERGYMATH | 74HCT244PW, SN74HCT244PW, RS244TXTSS20 | Octal buffer/line driver; 3-state; TTL-enabled | TSSOP20L |
| EM74HCT244D | ENERGYMATH | 74HCT244D, SN74HCT244DW, RS244TXS20 | Octal buffer/line driver; 3-state; TTL-enabled | SOP-20L |
| EM74HCT241PW | ENERGYMATH | 74HCT241PW, SN74HCT241PW, | Octal buffer/line driver; 3-state; TTL-enabled | TSSOP20L |
| EM74HCT241D | ENERGYMATH | 74HCT241D, SN74HCT241DW, | Octal buffer/line driver; 3-state; TTL-enabled | SOP-20L |
| EM74HCT240PW | ENERGYMATH | 74HCT240PW, SN74HCT240PW, RS240TXTSS20 | Octal buffer/line driver; 3-state; inverting; TTL-enabled | TSSOP20L |