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 |
|---|---|---|---|---|
| EM74HCT573PW | ENERGYMATH | 74HCT573PW, SN74HCT573PW, RS573XTSS20 | Octal D-type transparent latch; 3-state; TTL input | TSSOP20L |
| EM74HCT573D | ENERGYMATH | 74HCT573D, SN74HCT573D, RS573XS20 | Octal D-type transparent latch; 3-state; TTL input | SOP-20L |
| EM74HC574PW | ENERGYMATH | 74HC574PW, SN74HC574PW, | Octal D-type flip-flop; positive edge-trigger; 3-state | TSSOP20L |
| EM74HC574D | ENERGYMATH | 74HC574D, SN74HC574D, | Octal D-type flip-flop; positive edge-trigger; 3-state | SOP-20L |
| EM74HCT574PW | ENERGYMATH | 74HCT574PW, SN74HCT574PW, | Octal D-type flip-flop; positive edge-trigger; 3-state; TTL input | TSSOP20L |
| EM74HCT574D | ENERGYMATH | 74HCT574D, SN74HCT574D, | Octal D-type flip-flop; positive edge-trigger; 3-state; TTL input | SOP-20L |
| EM74HC174PW | ENERGYMATH | 74HC174PW, SN74HC174PW, | Hex D-type flip-flop with reset; positive-edge trigger | TSSOP16L |
| EM74HC174D | ENERGYMATH | 74HC174D, SN74HC174D, | Hex D-type flip-flop with reset; positive-edge trigger | SOP-16L |
| EM74HCT174PW | ENERGYMATH | 74HCT174PW, SN74HCT174PW, | Hex D-type flip-flop with reset; positive-edge trigger; TTL input | TSSOP16L |
| EM74HCT174D | ENERGYMATH | 74HCT174D, SN74HCT174D, | Hex D-type flip-flop with reset; positive-edge trigger; TTL input | SOP-16L |
| EM74HC138PW | ENERGYMATH | 74HC138PW, SN74HC138PW, RS138XTSS16 | 3-to-8 line decoder/demultiplexer; inverting | TSSOP16L |
| EM74HC138D | ENERGYMATH | 74HC138D, SN74HC138D, RS138XS16-G | 3-to-8 line decoder/demultiplexer; inverting | SOP-16L |
| EM74HCT138PW | ENERGYMATH | 74HCT138PW, SN74HCT138PW, RS138TXTSS16-G | 3-to-8 line decoder/demultiplexer; inverting; TTL input | TSSOP16L |
| EM74HCT138D | ENERGYMATH | 74HCT138D, SN74HCT138D, RS138TXS16 | 3-to-8 line decoder/demultiplexer; inverting; TTL input | SOP-16L |
| EM74AHCT2G34GW | ENERGYMATH | 74HCT2G34GW | Dual buffer gate; TTL input | SOT363 |
| EM74AHCT2G34GV | ENERGYMATH | 74HCT2G34GV | Dual buffer gate; TTL input | SOT23-6L |
| EM74AHCT2G17GW | ENERGYMATH | 74HCT2G17GW | dual buffer; Schmitt-trigger; TTL input | SOT363 |
| EM74AHCT2G17GV | ENERGYMATH | 74HCT2G17GV | dual buffer; Schmitt-trigger; TTL input | SOT23-6L |
| EM74AHCT2G16GW | ENERGYMATH | 74HCT2G16GW | dual buffer gate; TTL input | SOT363 |
| EM74AHCT2G16GV | ENERGYMATH | 74HCT2G16GV | dual buffer gate; TTL input | SOT23-6L |