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 |
|---|---|---|---|---|
| EM74HC00PW | ENERGYMATH | 74HC00PW, SN74HC00PW, | Quad 2-input NAND gate | TSSOP14L |
| EM74HC00D | ENERGYMATH | 74HC00D, SN74HC00D, | Quad 2-input NAND gate | SOP-14L |
| EM74HC273PW | ENERGYMATH | 74HC273PW, SN74HC273PW, RS273XTSS20 | Octal D-type flip-flop with reset; positive-edge trigger | TSSOP20L |
| EM74HC273D | ENERGYMATH | 74HC273D, SN74HC273D, RS273XS20 | Octal D-type flip-flop with reset; positive-edge trigger | SOP-20L |
| EM74HCT273PW | ENERGYMATH | 74HCT273PW, SN74HCT273PW, RS273XTSS20 | Octal D-type flip-flop with reset; positive-edge trigger; TTL input | TSSOP20L |
| EM74HCT273D | ENERGYMATH | 74HCT273D, SN74HCT273D, RS273XS20 | Octal D-type flip-flop with reset; positive-edge trigger; TTL input | SOP-20L |
| EM74HC373PW | ENERGYMATH | 74HC373PW, SN74HC373PW, RS373XTSS20 | Octal D-type transparent latch; 3-state | TSSOP20L |
| EM74HC373D | ENERGYMATH | 74HC373D, SN74HC373D, RS373XS20 | Octal D-type transparent latch; 3-state | SOP-20L |
| EM74HCT373PW | ENERGYMATH | 74HCT373PW, SN74HCT373PW, RS373XTSS20 | Octal D-type transparent latch; 3-state; TTL input | TSSOP20L |
| EM74HCT373D | ENERGYMATH | 74HCT373D, SN74HCT373D, RS373XS20 | Octal D-type transparent latch; 3-state; TTL input | SOP-20L |
| EM74HC374PW | ENERGYMATH | 74HC374PW, SN74HC374PW, | Octal D-type flip-flop; positive edge-trigger; 3-state | TSSOP20L |
| EM74HC374D | ENERGYMATH | 74HC374D, SN74HC374D, | Octal D-type flip-flop; positive edge-trigger; 3-state | SOP-20L |
| EM74HCT374PW | ENERGYMATH | 74HCT374PW, SN74HCT374PW, | Octal D-type flip-flop; positive edge-trigger; 3-state; TTL input | TSSOP20L |
| EM74HCT374D | ENERGYMATH | 74HCT374D, SN74HCT374D, | Octal D-type flip-flop; positive edge-trigger; 3-state; TTL input | SOP-20L |
| EM74HC377PW | ENERGYMATH | 74HC377PW, SN74HC377PW, | Octal D-type flip-flop with data enable; positive-edge trigger | TSSOP20L |
| EM74HC377D | ENERGYMATH | 74HC377D, SN74HC377D, | Octal D-type flip-flop with data enable; positive-edge trigger | SOP-20L |
| EM74HCT377PW | ENERGYMATH | 74HCT377PW, SN74HCT377PW, | Octal D-type flip-flop with data enable; positive-edge trigger; TTL input | TSSOP20L |
| EM74HCT377D | ENERGYMATH | 74HCT377D, SN74HCT377D, | Octal D-type flip-flop with data enable; positive-edge trigger; TTL input | SOP-20L |
| EM74HC573PW | ENERGYMATH | 74HC573PW, SN74HC573PW, RS573XTSS20 | Octal D-type transparent latch; 3-state | TSSOP20L |
| EM74HC573D | ENERGYMATH | 74HC573D, SN74HC573D, RS573XS20 | Octal D-type transparent latch; 3-state | SOP-20L |