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 |
|---|---|---|---|---|
| EM74HCT597D | ENERGYMATH | 74HCT597D, CD74HCT597D, | 8-bit shift register with input flip-flops; TTL-enabled | SOP-16L |
| EM74HCT595PW | ENERGYMATH | 74HCT595PW, SN74HCT595PW, RS595TXTSS16-G | 8-bit serial-in, serial or parallel-out shift register with output latches; 3-state; TTL-enabled | TSSOP16L |
| EM74HCT595DB | ENERGYMATH | SN74HCT595DB, | 8-bit serial-in, serial or parallel-out shift register with output latches; 3-state; TTL-enabled | SSOP-16L |
| EM74HCT595D | ENERGYMATH | 74HCT595D, SN74HCT595D, RS595TXS16 | 8-bit serial-in, serial or parallel-out shift register with output latches; 3-state; TTL-enabled | SOP-16L |
| EM74HCT594PW | ENERGYMATH | 74HCT594PW | 8-bit shift register with output register; TTL-enabled | TSSOP16L |
| EM74HCT594DB | ENERGYMATH | 74HCT594DB | 8-bit shift register with output register; TTL-enabled | SSOP-16L |
| EM74HCT594D | ENERGYMATH | 74HCT594D, SN74HCT594D, | 8-bit shift register with output register; TTL-enabled | SOP-16L |
| EM74HCT541PW | ENERGYMATH | 74HCT541PW, SN74HCT541PW, RS541TXTSS20 | Octal buffer/line driver; 3-state; TTL-enabled | TSSOP20L |
| EM74HCT541D | ENERGYMATH | 74HCT541D, SN74HCT541DW, RS541TXS20 | Octal buffer/line driver; 3-state; TTL-enabled | SOP-20L |
| EM74HCT540PW | ENERGYMATH | 74HCT540PW, SN74HCT540PW, RS540TXTSS20-G | Octal buffer/line driver; 3-state; inverting; TTL-enabled | TSSOP20L |
| EM74HCT540D | ENERGYMATH | 74HCT540D, SN74HCT540DW, RS540TXS20 | Octal buffer/line driver; 3-state; inverting; TTL-enabled | SOP-20L |
| EM74HCT4094PW | ENERGYMATH | 74HCT4094PW, CD74HCT4094PW, | 8-stage shift-and-store bus register; TTL-enabled | TSSOP16L |
| EM74HCT4094D | ENERGYMATH | 74HCT4094D, CD74HCT4094D, | 8-stage shift-and-store bus register; TTL-enabled | SOP-16L |
| EM74HCT4075D | ENERGYMATH | 74HCT4075D, CD74HCT4075D, | Triple 3-input OR gate; TTL input | SOP-14L |
| EM74HCT4075PW | ENERGYMATH | 74HCT4075PW, CD74HCT4075PW, | Triple 3-input OR gate; TTL input | TSSOP14L |
| EM74HCT4002PW | ENERGYMATH | 74HCT4002PW | Dual 4-input NOR gate; TTL input | TSSOP14L |
| EM74HCT4002D | ENERGYMATH | 74HCT4002D | Dual 4-input NOR gate; TTL input | SOP-14L |
| EM74HCT368PW | ENERGYMATH | 74HCT368PW, SN74HCT368PW, | Hex inverter/line driver (3-state); TTL input | TSSOP16L |
| EM74HCT368D | ENERGYMATH | 74HCT368D, SN74HCT368D, | Hex inverter/line driver (3-state); TTL input | SOP-16L |
| EM74HCT367PW | ENERGYMATH | 74HCT367PW, SN74HCT367PW, | Hex buffer/line driver; 3-state; TTL input | TSSOP16L |